GB17269-2003 Safety regulations for dust explosion prevention during aluminum and magnesium powder processing
Some standard content:
5.2.2.5.2.6 and 3.3 of this standard are recommended, and the rest are mandatory. CB172692003
This standard is based on the actual experience of aluminum iron powder processing in China, and refers to the American Fire Protection Association NFPA1X Iron Particles, Iron Powder Storage and Handling Standard (1998 Edition) and NFPA651 Aluminum Four Post, Ground and Aluminum Powder Production and Handling Standard 1999 Edition. This standard replaces Gn17369-1998 Aluminum Powder Processing Air Explosion Safety Regulations. Compared with G172691998, this standard has the following major changes: some chapters and sections have been adjusted (5.7, 8, 9, 1 of the 1998 edition) corresponding to 73.10.9, 6 of this edition respectively); some clauses have been added according to the production practice of my country (7.7 of this edition), and some original clauses (6.3.4 of the 199R edition) have been added according to NFTA480 (1998 edition) and NFPA651 (1998 edition). This standard was proposed by the National Safety Supervision Administration. This standard was approved by the National Powder Bull The explosion-proof standard is under the jurisdiction of the Technical Committee of the State Council, and the basic units of the standard are: Wuhan Safety and Environmental Protection Research Institute, Northeast Light Metal Powder Industry Company, and Beijing Lihua Powder Research Institute. The drafters of this standard are: Tong Jia, Yu Yongfang, Deng Shufan, Wu Changhai, Gong Hongjin, Li Xiaofei, and Cai An. This standard was first issued in 1993.
1 Scope
Safety regulations for dust explosion prevention in aluminum and magnesium powder processing
This standard defines the explosion-proof safety requirements during the production and transportation of aluminum and magnesium powder. This standard is applicable to the equipment of aluminum and magnesium material processing plants (workshops). 2 Normative reference documents
GB17269—2003
The clauses in the following documents become the clauses of this standard through reference in this standard. For the referenced documents with a date of month, all subsequent amendments (excluding corrections) or revisions are not applicable to this standard. However, the latest versions of these documents are applicable to the final bid. GB1247 6.1 Electrical apparatus for use in potentially explosive dust environments Part 1: Electrical apparatus protected by enclosures with limited surface protection GB/1560: Guide to dust explosion protection
GB/T1791S Guide to dust collectors for use in dust explosion hazardous locations GB0057 Specification for design of buildings
GB50D58 Specification for electrical installations in explosive and fire hazardous environments GB11S Specification for fire protection design of buildings
3 Technical requirements and definitions
The following terms and definitions apply to the following standards, 3. 1
Aluminum-magnesium powder lumimand/ormagnestpmpawder refers to lead in the air or gaseous state, and lead-magnesium alloy particles. 3.2
Aluminum-iron powder processing refers to the process of processing metal aluminum, magnesium or aluminum alloy into particles using a specific process and its transportation within the factory. 4 Management
4.1 The main person in charge of the enterprise shall master the management flow of all hazardous places of magnesium powder combustion and explosion in the enterprise, and take effective safety technical measures to control aluminum powder explosion.
4.2 Based on the characteristics of aluminum powder combustion hazardous places in the enterprise, combined with this standard: formulate the implementation details of the enterprise's dust with coal Plan safety standards checklist and conduct regular inspections according to safety standards checklist. 4.3 Gas, temperature, pressure and other measuring instruments should be regularly inspected and calibrated. 4.4 Enterprises should do a good job in production safety and dust explosion education, popularize dust explosion prevention knowledge and related safety regulations, so that workers can understand the explosiveness of aluminum parts, switches, production costs, emergency specifications, the location, use, use methods and disaster prevention routes of all facilities. Employees at special posts should undergo regular safety training and pass the examination before they can go up to work. 4.5 All facilities such as air barriers, partitions and vents must be complete and effective and must not be used without the approval of relevant departments. 4.6 There must be no non-productive open flames in workshops and warehouses. 4.7 Materials that are incompatible with magnesium powder or gasoline, kerosene and other flammable materials should not be stored in workshops and finished product warehouses. CB17269—2003
4,8 The south wind and other atmospheric conditions should be closed. 1. The doors and windows of the warehouse should be closed to prevent the product from being blown away and the powder from flying. 4.9 The construction, modification or expansion of the aluminum lock powder processing plant <workshop> should be subject to safety pre-evaluation. 5 Factory layout and workshop (warehouse) structure
5.1 Factory office
5.1.1 Specifications 1. The distance between the factory's warehouse and the civil building should be within 25 meters: the distance from the public building should be within 1 meter,
5.1.2 The internal distance of the lead powder processing plant should be greater than 1 meter. 5.1.3 The factory should use the currency of the factory to communicate with the staff, 5.1.4 The factory area should take necessary safety measures, and the relevant personnel are not allowed to enter, 5.2 Building structure
5.2.1 Know the money and money. 1. The factory's warehouse should be set up according to the fire protection requirements of 15. 5.2.2 The building used for processing, transportation or storage should be a single-story pure building without a basement, 5.2.3 The wall surface of the room should only use a half-complete structure that is not easy to weave dust and easy to sweep, and should not be connected upward. Non-constructed materials should be wiped off, and lightning should not be allowed, 5.2.4 The ground working platform of the three rooms and the finished room should be made of hard anti-static non-combustible materials, and there should be no dust.
In terms of rate The room is not suitable for the project or the company avoids the problem of indoor and external water flow: 5.2.6 II. Warehouse rhinoceros top hole uses light structure 5.3 Door and window structure
5.3.1 All doors and window frames of the workshop and finished product warehouse shall be made of materials. 5.3.2 The cabinet shall be equipped with barrier-type window inspection 5.3.3 The door shall be opened outward and shall not be set with thresholds. 5.4 Fire protection requirements
According to the Class A fire hazard of ammonium powder, the area of the warehouse shall comply with the relevant provisions of (T16 for full evacuation. 6 Electricity and lightning protection devices
6.1 The factory area shall be divided into explosive dust environment hazardous areas according to GB5008. 6.2 Electrical equipment for explosive powder cattle ring All equipment and operation shall be in accordance with GB50058 and GB12476.1.6.3 The shearing room of the workshop shall meet the requirements of UH0C57. 7.1 General provisions 7.1.1 During the dust production and loading and unloading process, measures shall be taken to prevent sparks and large sparks. 7.1.2 When welding, moving and other open flame operations are carried out in the workshop: The following provisions shall be observed: With the approval of the person in charge of the work permit: At the beginning of the operation, the equipment shall be turned on and the dust and flammable materials in the workplace shall be cleaned up. Before the operation, the barrels (packaging) containing the product shall be transported out of the workshop: The area where the open flame operation is carried out shall be separated from the room at a high altitude. During open flame operations, there must be measures to prevent the burning of combustible materials or explosions caused by flying sparks; during open flame operations, there must be safety personnel on site to supervise; during the cooling period after the open flame operation, dust is not allowed to enter the open flame workplace. 7.1.3 During the work, there should be no dust flying or leaking into the air. 7.2 Equipment requirements
7.2.1 Aluminum-iron powder processing equipment shall comply with the following provisions: - It shall be accompanied by an equipment safety manual,
and an air defense device +
and an overload protection device:
- The inside and outside are easy to clean, and there is no dust; - Good grounding:
- The equipment is well grounded, and there is no dust leakage.
GR 17269—2003
7.2.2 Permanent separators, wind separators or screening machines should be installed at places where metal or other foreign objects may enter. 7.2.3 The explosion venting system should be implemented in accordance with the requirements of GB/T15605. 7.2.4 The enterprise should stipulate the equipment regular inspection period, shutdown and maintenance standards according to the equipment operation situation, and strictly implement them. 7.2.5 The construction unit of the inspection equipment should formulate safety technical measures; 7.2. The materials, materials, oils, etc. used for maintenance should comply with relevant safety regulations. 7.2. The tools used should be pre-explosion tools. 7.2. The inspection parts should be cleaned before daily inspection and maintenance. During maintenance, except for dismantling the designated equipment suction parts, other equipment that has not been handled by the safety enterprise should not be touched. At the same time, the maintenance parts should be separated from non-inspection parts. 7.2.9 When inspecting the dust terminal, empty the dust collector and remove the dust after combustion. Remove and seal the dust collector.
7.2.10 The construction unit of the equipment maintenance shall formulate the construction network and strictly follow the procedures. It is not allowed to inspect multiple parts in one workshop or one system.
7.3 Startup and operation
7.3.1 During the feeding and operation, the equipment and material connection surface shall be cleaned and wiped with water. 7.3.2 Lead powder, aluminum and magnesium alloy powder coal mill dry grinding should comply with the following provisions: - The system should be filled with nitrogen for protection. When the equipment is running, the oxygen content of the protective gas should be 3%~5%. After a period of operation, the oxygen content in the protective gas should be 2%~6% for lead powder and 2%~6% for aluminum and magnesium powder. If it cannot reach this number after repeated adjustments, it should be stopped immediately for processing;
The temperature of the mixed gas and dust at the outlet of the ball mill shall not exceed 0℃, and the grinding temperature of the aluminum and alloy powder shall not exceed 30℃.
When the blower of the ball mill system is running, the temperature of the population should be 2CP:~1500P. When it still cannot reach the specified number after repeated adjustments, it should be stopped immediately for processing.
Before starting the powder making equipment, all relevant personnel should be notified. After normal operation, the temperature should be 30-6Cin The operation should be checked once. When the humidity, pressure or gas concentration is not in compliance with the standard, it should be adjusted in time. If the adjustment is ineffective, the machine should be stopped immediately for processing:
When the ball mill is started, no one is allowed to work in the ball mill room: When the machine system is in use, check if there are any abnormalities on the rotor and shell of the powder selector. The starting sequence of the equipment is: selector, blower, pump, ball mill, feeder, storage tank: mill, install fan seal head. Material temperature: lead powder should not exceed 75, aluminum alloy powder should not exceed 5: before replacing the seal, the equipment should be stopped, and the packing should be replaced when the system temperature drops to room temperature. When replacing the material, the stator oil or machine flushing should be cleaned, and the taken out packing should be put into the oil immediately; when the ball mill system needs to be opened for work such as material blockage in the ball mill system, the ball mill system should be The temperature drop rate should be carried out at room temperature. When handling the blockage, the dust should be stopped and explosion-proof tools should be used. 7.3.3 The powdering and polishing of magnesium alloy powder should comply with the relevant provisions of 7.3.2. 7.3.4 The granulation of aluminum powder should comply with the following provisions:
GB17269—2003
-Do not add smoke-soaked bait into the furnace: During the printing process, no flame should be emitted around the melting point; - Before granulation, the pressure should be tested and the granulation chamber should be inspected. After confirming safety, the dust on the diffusion plate should be blown off, and then the fan of the granulation chamber should be turned on for granulation:
-No positive energy is generated in the granulation chamber;
When sparks are found, granulation should be stopped immediately. 7.3.5 When producing magnesium powder by milling, the temperature of the milled magnesium ring should not exceed 120℃. 7.3.6 High-speed continuous magnesium powder unit During processing, the following regulations shall be observed: 1. The equipment startup sequence is fan, cooling water valve, magnesium powder machine, elevator, milling machine, and the order of storage is the opposite; when the equipment is not running, when the temperature of the magnesium powder machine fan rises more than 40 or the exhaust gas and powder mixer temperature rises more than 5, the equipment should be stopped and then production can be resumed!
1. When the equipment is running, the unit should be observed at any time, and the unit should be stopped immediately for processing when abnormalities are found. 7.4 Loading and unloading
7.4.1 The packaging or containers used to hold aluminum and magnesium powder should be made of conductive materials that do not produce incineration. 7.4.2 During loading and unloading, the entire powder packaging container should be electrically connected to the equipment and statically grounded. 8. In-plant transportation
B.1 Wheeled containers and carts for loading and unloading
All standard containers and technical containers, automatic loading vehicles, etc. should be statically grounded. 2.2 Pneumatic conveying
2.2.1 When air is used as the conveying gas, the concentration of aluminum and aluminum alloy powder in the conveying system should be lower than the lower explosion limit of 5°C, and the concentration of magnesium powder should be lower than the lower explosion concentration.
2.2 When the concentration of lead and lead-magnesium alloy powder conveyed by the drum is close to reaching the lower explosion concentration, the ambient gas such as argon should be used as the conveying medium. The oxygen concentration in the ambient gas should meet the requirements of 7.3.2, and the oxygen concentration in the ambient gas should be monitored by the line. B.2.3 If the conveying gas comes from a relatively cold environment, and the temperature of the pipeline and the dust collector is relatively constant, measures should be taken to prevent the water vapor in the conveying gas from condensing.
B.2.4 To prevent aluminum and magnesium powder from depositing in the pipeline: the conveying gas should have a high flow rate. Among them, the pressure of the aluminum alloy powder should be greater than 19mF/m/m
B.3 Pneumatic conveying pipeline
8.3.1 When air is used as the bulk medium, the conveying pipeline should be opened with a vent. The specific opening position must comply with the provisions of GB/T1C5.
8.3.2 In areas where pipeline rupture may cause damage to equipment or personnel but cannot be fully depressurized through the vent, the pipeline should be able to withstand the internal pressure (gauge pressure): aluminum alloy powder 6!P, aluminum powder 860kPE. If the pipeline rupture does not cause a real risk of damage to equipment or personnel, a pipeline with a lower internal pressure can be used as an auxiliary vent. 8.3.3 The pipeline should be made of conductive materials that do not produce combustion and non-conductive materials should not be used. 8.3.4 The pipeline should be connected to the ground with equal potential. 8.3.5 When installing a conveying pipeline in a tower or in an open environment, the air should not enter the tower. 8.4 Pneumatic tower fan
8.4.1 The blades of the fan should be made of conductive and spark-free materials and the fan should meet the dust protection requirements. 8.4.2 The fan should be interlocked with the aluminum and magnesium powder handling equipment. When the fan is stopped, the handling equipment should be able to stop automatically. 8.5 Storage
8.5.1 The packaged aluminum powder should be stored in a dry place. 8.5.2 The packaging or container containing aluminum powder should be placed 1m away from the door and heat source. A small passage of 0.01 m should be left between each row of devices. The safety door or fire passage should be blocked. GB17269-2003
8.5.3 In order to prevent the product from being heated locally and causing fire, regular inspections should be carried out (such as inspection by hand). If the temperature rises, the product should be immediately disinfected and moved to a safe place until the temperature rises. 9 Ventilation and dust removal
9.1 General requirements
The workshop should have appropriate ventilation equipment to ensure good ventilation: 9.2 Dust removal
9.2.1 The dust collection area should be equipped with a dust collection area. 9.2.2 The dust explosion-proof type fan should be used and the fan should be installed with dust collector. 9.2.3 The dust collector should meet the following requirements:
The dust collector should be located at an appropriate location in the workshop. If it is located in the process, corresponding explosion-proof measures should be taken: When the dust removal equipment is used, the dust collector should meet the requirements of GI3/T_7919. 9.2.4 The dust removal system should be implemented in accordance with 3.3.
9.2.5 The entire dust collector system should maintain good electrical connections and be reliable. 9.2.6 The dust collector should be equipped with an internal flag sensor and a display instrument. The alarm value should be 5 times lower than the minimum temperature of the dust cloud or dust source. 9.3 Accumulation cleaning
9.3.1 The system should be cleaned regularly when the system is shut down and the power supply is cut off. The floor cleaning should be carried out according to 9.3.2. The dust in the dust collector should be emptied regularly: 9.3.2 plus 1 and The dust just discharged should be collected into a special metal container with a non-sparking conductive shovel and soft broom or natural fiber hard brush. 9.3.3 Do not use water directly in the production area. When cleaning dust, the following conditions should be met. Once approved by the person in charge of the project and the cleaning time is determined: 1. The staff has been trained!
The county should use a good ventilation system with a gas concentration of less than the lower explosion limit: The water used to clean the dust must be discharged to a safe place. 9.3.4 Do not use compressed air to sweep the dust. 9.4 Basic requirements
Regularly take measures to clean the dust. The dust inside the equipment should be removed when the production equipment is idling. 10 Heating
10.1 The workshop should be heated by indirect heating, water heater or steam heater. 10.2 The following provisions should be observed when using a water heater as a heat exchanger: The heating pipes should be clear: The steam or hot water pipes and heat exchange devices should not be placed in workshops with explosion hazards: The pipes and radiators and their joints should not be filled with water or air. 10.3 When using direct heating, the following provisions should be observed: The heat source should be located in a dust-free area
The fan that transports hot air should be dust-free all year round: Low heat The air outside the workshop should be dust-free and ensure that the hot air will not be cold when it contacts the magnesium powder. 11. Physical protection bZxz.net
11.1 Production personnel should use labor protection products according to the relevant provisions of the State Council, GB17269-2003
11.2 In the process flow, the place where the air is used should be equipped with a re-absorption protection device or strengthen the wind. 11.3 The clothes of system operators should be made of cloth that is resistant to static electricity and is not easy to generate static electricity. At the same time, they should be clean and taken off immediately. 11.4 System operators should wear casual shoes and socks 12 Fire
2. 1. Fire personnel should be trained and fire equipment and fire extinguishers should be readily available. Fire extinguishing methods that cause dust accumulation should not be used. 12. 4. Water foam or oxygen extinguishing belts should not be used quickly. Enterprises should formulate fire and disaster relief plans and conduct regular exercises under the cooperation and guidance of local fire departments. 12. 5.2. Lead powder, aluminum alloy powder coal mill dry grinding should comply with the following regulations: - The system should be filled with nitrogen for protection. When the equipment is running, the oxygen content of the protective gas should be 3%~5%. After a period of operation, the oxygen content in the protective gas should be 2%~6% for lead powder and 2%~6% for aluminum magnesium powder. If it cannot reach this number after repeated adjustments, it should be stopped immediately for processing;
The temperature of the mixed gas and dust at the outlet of the ball mill should not exceed 0℃, and the grinding temperature of the aluminum alloy powder should not exceed 10℃.
When the blower of the ball mill system is running, the temperature of the population should be 2CP:~1500P. When it still cannot reach the specified number after repeated adjustments, it should be stopped immediately for processing.
Before starting the powder making equipment, all relevant personnel should be notified. After normal operation, it should be inspected at 30itt--6Cin Check the operation status. If the humidity, pressure or gas concentration is not as required, adjust it in time. If the adjustment is ineffective, stop the machine immediately for processing: When the ball mill is started, no one is allowed to work in the ball mill room. When the machine system is in use, check if there are any abnormalities on the rotor and shell of the powder selector. The starting sequence of the equipment is: selector, blower, pump, ball mill, feeder, storage tank, mill, install fan seal head. Material temperature: lead powder should not exceed 75, aluminum alloy powder should not exceed 5: before replacing the seal, stop the equipment and wait until the system temperature drops to room temperature to replace the packing. When replacing the material, the stator oil or machine flush should be cleaned and the taken out packing should be put into the oil immediately. When the ball mill system needs to be opened for work such as ball mill system blockage, the ball mill system temperature should be lowered. The room temperature should be reduced to the standard: when handling the blockage, the dust should be stopped and explosion-proof tools should be used. 7.3.3 The powdering and grinding of magnesium alloy powder should comply with the relevant provisions of 7.3.2. 7.3.4 The granulation of aluminum powder should comply with the following provisions:
GB17269—2003
-Do not add smoke-soaked bait into the furnace: During the melting process, no flame should be emitted around the melting point; - Before granulation, the pressure should be tested and the granulation chamber should be inspected. After confirming safety, the dust on the diffusion plate should be blown away, and then the fan of the granulation chamber should be turned on to pull:
-No positive energy is generated in the granulation chamber;
When sparks are found, granulation should be stopped immediately. 7.3.5 When producing magnesium powder by milling, the temperature of the milled magnesium ring should not exceed 120℃. 7.3.6 High-speed continuous magnesium powder unit heating During the working hours, the following regulations shall be observed: 1. The equipment startup sequence is fan, cooling water valve, magnesium powder machine, elevator, milling machine, and the order of storage is the opposite; when the equipment is not running, when the temperature of the magnesium powder machine fan rises more than 40 or the exhaust gas and powder mixer temperature rises more than 5, the equipment should be stopped and then production can be resumed!
1. When the equipment is running, the unit should be observed at any time, and the unit should be stopped immediately for processing when abnormalities are found. 7.4 Loading and unloading
7.4.1 The packaging or containers used to contain aluminum and magnesium powder should be made of conductive materials that do not produce incineration. 7.4.2 When loading and unloading, the entire powder packaging container should be electrically connected to the equipment and statically grounded. 8 In-plant transportation
B.1 Wheeled containers and carts for loading and unloading
All standard containers and technical containers, automatic loading vehicles, etc. should be statically grounded. 2.2 Pneumatic conveying
2.2.1 When air is used as the conveying gas, the concentration of aluminum and aluminum alloy powder in the conveying system should be lower than the lower explosion limit of 5°C, and the concentration of magnesium powder should be lower than the lower explosion concentration.
2.2 When the concentration of lead and lead-magnesium alloy powder conveyed by the drum is close to reaching the lower explosion concentration, the ambient gas such as argon should be used as the conveying medium. The oxygen concentration in the ambient gas should meet the requirements of 7.3.2, and the oxygen concentration in the ambient gas should be monitored by the line. B.2.3 If the conveying gas comes from a relatively cold environment, and the temperature of the pipeline and the dust collector is relatively constant, measures should be taken to prevent the water vapor in the conveying gas from condensing.
B.2.4 To prevent aluminum and magnesium powder from depositing in the pipeline: the conveying gas should have a high flow rate. Among them, the pressure of the aluminum alloy powder should be greater than 19mF/m/m
B.3 Pneumatic conveying pipeline
8.3.1 When air is used as the bulk medium, the conveying pipeline should be opened with a vent. The specific opening position must comply with the provisions of GB/T1C5.
8.3.2 In areas where pipeline rupture may cause damage to equipment or personnel but cannot be fully depressurized through the vent, the pipeline should be able to withstand the internal pressure (gauge pressure): aluminum alloy powder 6!P, aluminum powder 860kPE. If the pipeline rupture does not cause a real risk of damage to equipment or personnel, a pipeline with a lower internal pressure can be used as an auxiliary vent. 8.3.3 The pipeline should be made of conductive materials that do not produce combustion and non-conductive materials should not be used. 8.3.4 The pipeline should be connected to the ground with equal potential. 8.3.5 When installing a conveying pipeline in a tower or in an open environment, the air should not enter the tower. 8.4 Pneumatic tower fan
8.4.1 The blades of the fan should be made of conductive and spark-free materials and the fan should meet the dust protection requirements. 8.4.2 The fan should be interlocked with the aluminum and magnesium powder handling equipment. When the fan is stopped, the handling equipment should be able to stop automatically. 8.5 Storage
8.5.1 The packaged aluminum powder should be stored in a dry place. 8.5.2 The packaging or container containing aluminum powder should be placed 1m away from the door and heat source. A small passage of 0.01 m should be left between each row of devices. The safety door or fire passage should be blocked. GB17269-2003
8.5.3 In order to prevent the product from being heated locally and causing fire, regular inspections should be carried out (such as inspection by hand). If the temperature rises, the product should be immediately disinfected and moved to a safe place until the temperature rises. 9 Ventilation and dust removal
9.1 General requirements
The workshop should have appropriate ventilation equipment to ensure good ventilation: 9.2 Dust removal
9.2.1 The dust collection area should be equipped with a dust collection area. 9.2.2 The dust explosion-proof type fan should be used and the fan should be installed with dust collector. 9.2.3 The dust collector should meet the following requirements:
The dust collector should be located at an appropriate location in the workshop. If it is located in the process, corresponding explosion-proof measures should be taken: When the dust removal equipment is used, the dust collector should meet the requirements of GI3/T_7919. 9.2.4 The dust removal system should be implemented in accordance with 3.3.
9.2.5 The entire dust collector system should maintain good electrical connections and be reliable. 9.2.6 The dust collector should be equipped with an internal flag sensor and a display instrument. The alarm value should be 5 times lower than the minimum temperature of the dust cloud or dust source. 9.3 Accumulation cleaning
9.3.1 The system should be cleaned regularly when the system is shut down and the power supply is cut off. The floor cleaning should be carried out according to 9.3.2. The dust in the dust collector should be emptied regularly: 9.3.2 plus 1 and The dust just discharged should be collected into a special metal container with a non-sparking conductive shovel and soft broom or natural fiber hard brush. 9.3.3 Do not use water directly in the production area. When cleaning dust, the following conditions should be met. Once approved by the person in charge of the project and the cleaning time is determined: 1. The staff has been trained!
The county should use a good ventilation system with a gas concentration of less than the lower explosion limit: The water used to clean the dust must be discharged to a safe place. 9.3.4 Do not use compressed air to sweep the dust. 9.4 Basic requirements
Regularly take measures to clean the dust. The dust inside the equipment should be removed when the production equipment is idling. 10 Heating
10.1 The workshop should be heated by indirect heating, water heater or steam heater. 10.2 The following provisions should be observed when using a water heater as a heat exchanger: The heating pipes should be clear: The steam or hot water pipes and heat exchange devices should not be placed in workshops with explosion hazards: The pipes and radiators and their joints should not be filled with water or air. 10.3 When using direct heating, the following provisions should be observed: The heat source should be located in a dust-free area
The fan that transports hot air should be dust-free all year round: Low heat The air outside the workshop should be dust-free and ensure that the hot air will not be cold when it contacts the magnesium powder. 11. Physical protection
11.1 Production personnel should use labor protection products according to the relevant provisions of the State Council, GB17269-2003
11.2 In the process flow, the place where the air is used should be equipped with a re-absorption protection device or strengthen the wind. 11.3 The clothes of system operators should be made of cloth that is resistant to static electricity and is not easy to generate static electricity. At the same time, they should be clean and taken off immediately. 11.4 System operators should wear casual shoes and socks 12 Fire
2. 1. Fire personnel should be trained and fire equipment and fire extinguishers should be readily available. Fire extinguishing methods that cause dust accumulation should not be used. 12. 4. Water foam or oxygen extinguishing belts should not be used quickly. Enterprises should formulate fire and disaster relief plans and conduct regular exercises under the cooperation and guidance of local fire departments. 12. 5.2. Lead powder, aluminum alloy powder coal mill dry grinding should comply with the following regulations: - The system should be filled with nitrogen for protection. When the equipment is running, the oxygen content of the protective gas should be 3%~5%. After a period of operation, the oxygen content in the protective gas should be 2%~6% for lead powder and 2%~6% for aluminum magnesium powder. If it cannot reach this number after repeated adjustments, it should be stopped immediately for processing;
The temperature of the mixed gas and dust at the outlet of the ball mill should not exceed 0℃, and the grinding temperature of the aluminum alloy powder should not exceed 10℃.
When the blower of the ball mill system is running, the temperature of the population should be 2CP:~1500P. When it still cannot reach the specified number after repeated adjustments, it should be stopped immediately for processing.
Before starting the powder making equipment, all relevant personnel should be notified. After normal operation, it should be inspected at 30itt--6Cin Check the operation status. If the humidity, pressure or gas concentration is not as required, adjust it in time. If the adjustment is ineffective, stop the machine immediately for processing: When the ball mill is started, no one is allowed to work in the ball mill room. When the machine system is in use, check if there are any abnormalities on the rotor and shell of the powder selector. The starting sequence of the equipment is: selector, blower, pump, ball mill, feeder, storage tank, mill, install fan seal head. Material temperature: lead powder should not exceed 75, aluminum alloy powder should not exceed 5: before replacing the seal, stop the equipment and wait until the system temperature drops to room temperature to replace the packing. When replacing the material, the stator oil or machine flush should be cleaned and the taken out packing should be put into the oil immediately. When the ball mill system needs to be opened for work such as ball mill system blockage, the ball mill system temperature should be lowered. The room temperature should be reduced to the standard: when handling the blockage, the dust should be stopped and explosion-proof tools should be used. 7.3.3 The powdering and grinding of magnesium alloy powder should comply with the relevant provisions of 7.3.2. 7.3.4 The granulation of aluminum powder should comply with the following provisions:
GB17269—2003
-Do not add smoke-soaked bait into the furnace: During the melting process, no flame should be emitted around the melting point; - Before granulation, the pressure should be tested and the granulation chamber should be inspected. After confirming safety, the dust on the diffusion plate should be blown away, and then the fan of the granulation chamber should be turned on to pull:
-No positive energy is generated in the granulation chamber;
When sparks are found, granulation should be stopped immediately. 7.3.5 When producing magnesium powder by milling, the temperature of the milled magnesium ring should not exceed 120℃. 7.3.6 High-speed continuous magnesium powder unit heating During the working hours, the following regulations shall be observed: 1. The equipment startup sequence is fan, cooling water valve, magnesium powder machine, elevator, milling machine, and the order of storage is the opposite; when the equipment is not running, when the temperature of the magnesium powder machine fan rises more than 40 or the exhaust gas and powder mixer temperature rises more than 5, the equipment should be stopped and then production can be resumed!
1. When the equipment is running, the unit should be observed at any time, and the unit should be stopped immediately for processing when abnormalities are found. 7.4 Loading and unloading
7.4.1 The packaging or containers used to contain aluminum and magnesium powder should be made of conductive materials that do not produce incineration. 7.4.2 When loading and unloading, the entire powder packaging container should be electrically connected to the equipment and statically grounded. 8 In-plant transportation
B.1 Wheeled containers and carts for loading and unloading
All standard containers and technical containers, automatic loading vehicles, etc. should be statically grounded. 2.2 Pneumatic conveying
2.2.1 When air is used as the conveying gas, the concentration of aluminum and aluminum alloy powder in the conveying system should be lower than the lower explosion limit of 5°C, and the concentration of magnesium powder should be lower than the lower explosion concentration.
2.2 When the concentration of lead and lead-magnesium alloy powder conveyed by the drum is close to reaching the lower explosion concentration, the ambient gas such as argon should be used as the conveying medium. The oxygen concentration in the ambient gas should meet the requirements of 7.3.2, and the oxygen concentration in the ambient gas should be monitored by the line. B.2.3 If the conveying gas comes from a relatively cold environment, and the temperature of the pipeline and the dust collector is relatively constant, measures should be taken to prevent the water vapor in the conveying gas from condensing.
B.2.4 To prevent aluminum and magnesium powder from depositing in the pipeline: the conveying gas should have a high flow rate. Among them, the pressure of the aluminum alloy powder should be greater than 19mF/m/m
B.3 Pneumatic conveying pipeline
8.3.1 When air is used as the bulk medium, the conveying pipeline should be opened with a vent. The specific opening position must comply with the provisions of GB/T1C5.
8.3.2 In areas where pipeline rupture may cause damage to equipment or personnel but cannot be fully depressurized through the vent, the pipeline should be able to withstand the internal pressure (gauge pressure): aluminum alloy powder 6!P, aluminum powder 860kPE. If the pipeline rupture does not cause a real risk of damage to equipment or personnel, a pipeline with a lower internal pressure can be used as an auxiliary vent. 8.3.3 The pipeline should be made of conductive materials that do not produce combustion and non-conductive materials should not be used. 8.3.4 The pipeline should be connected to the ground with equal potential. 8.3.5 When installing a conveying pipeline in a tower or in an open environment, the air should not enter the tower. 8.4 Pneumatic tower fan
8.4.1 The blades of the fan should be made of conductive and spark-free materials and the fan should meet the dust protection requirements. 8.4.2 The fan should be interlocked with the aluminum and magnesium powder handling equipment. When the fan is stopped, the handling equipment should be able to stop automatically. 8.5 Storage
8.5.1 The packaged aluminum powder should be stored in a dry place. 8.5.2 The packaging or container containing aluminum powder should be placed 1m away from the door and heat source. A small passage of 0.01 m should be left between each row of devices. The safety door or fire passage should be blocked. GB17269-2003
8.5.3 In order to prevent the product from being heated locally and causing fire, regular inspections should be carried out (such as inspection by hand). If the temperature rises, the product should be immediately disinfected and moved to a safe place until the temperature rises. 9 Ventilation and dust removal
9.1 General requirements
The workshop should have appropriate ventilation equipment to ensure good ventilation: 9.2 Dust removal
9.2.1 The dust collection area should be equipped with a dust collection area. 9.2.2 The dust explosion-proof type fan should be used and the fan should be installed with dust collector. 9.2.3 The dust collector should meet the following requirements:
The dust collector should be located at an appropriate location in the workshop. If it is located in the process, corresponding explosion-proof measures should be taken: When the dust removal equipment is used, the dust collector should meet the requirements of GI3/T_7919. 9.2.4 The dust removal system should be implemented in accordance with 3.3.
9.2.5 The entire dust collector system should maintain good electrical connections and be reliable. 9.2.6 The dust collector should be equipped with an internal flag sensor and a display instrument. The alarm value should be 5 times lower than the minimum temperature of the dust cloud or dust source. 9.3 Accumulation cleaning
9.3.1 The system should be cleaned regularly when the system is shut down and the power supply is cut off. The floor cleaning should be carried out according to 9.3.2. The dust in the dust collector should be emptied regularly: 9.3.2 plus 1 and The dust just discharged should be collected into a special metal container with a non-sparking conductive shovel and soft broom or natural fiber hard brush. 9.3.3 Do not use water directly in the production area. When cleaning dust, the following conditions should be met. Once approved by the person in charge of the project and the cleaning time is determined: 1. The staff has been trained!
The county should use a good ventilation system with a gas concentration of less than the lower explosion limit: The water used to clean the dust must be discharged to a safe place. 9.3.4 Do not use compressed air to sweep the dust. 9.4 Basic requirements
Regularly take measures to clean the dust. The dust inside the equipment should be removed when the production equipment is idling. 10 Heating
10.1 The workshop should be heated by indirect heating, water heater or steam heater. 10.2 The following provisions should be observed when using a water heater as a heat exchanger: The heating pipes should be clear: The steam or hot water pipes and heat exchange devices should not be placed in workshops with explosion hazards: The pipes and radiators and their joints should not be filled with water or air. 10.3 When using direct heating, the following provisions should be observed: The heat source should be located in a dust-free area
The fan that transports hot air should be dust-free all year round: Low heat The air outside the workshop should be dust-free and ensure that the hot air will not be cold when it contacts the magnesium powder. 11. Physical protection
11.1 Production personnel should use labor protection products according to the relevant provisions of the State Council, GB17269-2003
11.2 In the process flow, the place where the air is used should be equipped with a re-absorption protection device or strengthen the wind. 11.3 The clothes of system operators should be made of cloth that is resistant to static electricity and is not easy to generate static electricity. At the same time, they should be clean and taken off immediately. 11.4 System operators should wear casual shoes and socks 12 Fire
2. 1. Fire personnel should be trained and fire equipment and fire extinguishers should be readily available. Fire extinguishing methods that cause dust accumulation should not be used. 12. 4. Water foam or oxygen extinguishing belts should not be used quickly. Enterprises should formulate fire and disaster relief plans and conduct regular exercises under the cooperation and guidance of local fire departments. 12. 5.55555555~1500P, when it still cannot reach the desired value after multiple adjustments, the machine should be stopped immediately for processing. Before starting the powder making equipment, all relevant personnel should be notified. After normal operation, the operation should be checked once every 30itt--6Cin. When the humidity, pressure or gas concentration at the specified point is not in compliance with the standard, it should be adjusted in time. If the adjustment is ineffective, the machine should be stopped immediately for processing: When the ball mill is started, no one is allowed to work in the ball mill room: When the machine system uses the powder selection ceremony, check if there are any abnormalities on the rotor and shell of the powder selection machine. The general sequence of starting the equipment is: selector, blower, pump, ball mill, feeder, storage car: grinder, fan seal head material temperature: lead powder grinding is not more than 75, aluminum alloy powder grinding is not more than 5: ": The equipment should be stopped before replacing the seal, and the cumulative temperature should be kept When the temperature drops to room temperature, replace the filler. When changing materials, the stator oil or machine flushing should be done. The taken out filler should be put into the oil immediately. When the ball mill system needs to be opened to deal with the blockage of the ball mill system, the temperature of the ball mill system should be reduced to room temperature. When dealing with the blockage, the dust should be stopped and explosion-proof tools should be used. 7.3.3 The powder treatment of magnesium alloy powder should comply with the relevant provisions of 7.3.2. 7.3.4 The granulation of aluminum powder should comply with the following provisions:
GB17269—2003
- Do not add smoke and wet bait into the furnace: During the printing process, no flame should be emitted around the melting point; - Before granulation, the pressure should be tested and the granulation chamber should be inspected. After confirming safety, the dust on the diffusion plate should be blown clean, and then the fan of the granulation chamber should be turned on for granulation:
- No positive gas is generated in the granulation chamber. ;
When sparks are found, granulation should be stopped immediately. 7.3.5 When milling to produce magnesium powder, the temperature of the milled magnesium ring should not exceed 120℃. 7.3.6 When processing high-speed continuous volute magnesium powder unit, the following regulations should be observed: 1. The starting equipment sequence is fan, cooling water valve, magnesium powder machine, elevator, milling machine, and the storage sequence is the opposite; when the equipment is not running, when the temperature of the magnesium powder machine fan rises by more than 40 or the exhaust gas and powder mixer temperature rise by more than 5 degrees, the equipment should be stopped and production should resume!
When the equipment is running, the unit should be observed at any time, and if any abnormality is found, it should be stopped immediately for processing. 7.4 Loading and discharging
7.4.1 The packaging or containers used to hold aluminum-magnesium powder should be made of non-flammable conductive materials. 7.4.2 When loading and discharging, the entire powder packaging container should be electrically connected to the equipment and connected statically 8. In-factory transportation
B.1 Wheeled containers and carts for loading eggs
All types of compact and technical containers, automatic loading vehicles, etc. should be grounded electrostatically. 2.2 Pneumatic conveying
2.2.1 When air is used as the conveying gas, the concentration of aluminum and aluminum alloy powder in the conveying system should be lower than the lower explosion limit of 5°C, and the concentration of magnesium powder should be lower than the lower explosion concentration.
2.2 When the concentration of lead and lead-magnesium alloy powder conveyed by the drum is close to reaching the lower explosion concentration, the ambient gas such as argon should be used as the conveying medium. The oxygen concentration in the ambient gas should meet the requirements of 7.3.2, and the oxygen concentration in the ambient gas should be monitored by the line. B.2.3 If the conveying gas comes from a relatively cold environment, and the temperature of the duct and the dust collector is relatively constant, measures should be taken to prevent the water vapor in the conveying gas from condensing.
B.2.4 To avoid the deposition of aluminum and magnesium powder in the pipeline: the conveying gas should have a high flow rate. The aluminum and magnesium alloy powder should be greater than 19mF/m3
B.3 Pneumatic conveying pipeline
8.3.1 When air is used as the bulk medium, the conveying pipeline should be opened with a vent. The specific opening position must comply with the provisions of GB/T1C5.
8.3.2 In areas where pipeline rupture may cause damage to equipment or personnel but cannot be fully depressurized through the vent, the pipeline should be able to withstand the following internal pressure (gauge pressure): 60kPE for aluminum and magnesium alloy powder, 860kPE for aluminum and magnesium alloy powder. If the pipeline rupture does not cause a serious risk to equipment or personnel, a pipeline with a lower internal pressure can be used as an auxiliary vent. 8.3.3 The pipeline should be made of conductive materials that do not produce combustion and non-conductive materials should not be used. 8.3.4 The pipelines should be connected to the ground at the same potential. 8.3.5 When installing the conveying pipeline in the tower or in the environment of the tower, the air should be prevented from entering. 8.4 Pneumatic tower fan
8.4.1 The blades of the fan should be made of conductive and spark-free materials and the fan should meet the dust protection requirements. 8.4.2 The fan should be interlocked with the aluminum and magnesium powder handling equipment. When the fan stops, the handling equipment should be able to stop automatically. 8.5 Storage
8.5.1 The packaged aluminum powder should be stored in a dry place. 8.5.2 The packaging or containers containing explosives should be placed 1m away from the door and heat source. A small passage of 0.00m should be left between every two rows of containers. The safety door or fire passage should be blocked. GB17269-2003
8.5.3 In order to prevent local heating of products from causing fire, regular inspections should be carried out (such as inspection by hand). If the temperature rises, the product should be immediately disinfected and moved to a safe place until it is refrigerated. 9 Ventilation and dust removal
9.1 General requirements
The workshop should have a suitable ventilation area to ensure good ventilation: 9.2 The dust removal area should be equipped with a dust collector. 9.2.2 Dust explosion-proof fans should be used and the fan should be equipped with dust removal. 9.2.3 The dust collector shall meet the following requirements:
The dust collector should be located at an appropriate position in the workshop. If it is located in the process, appropriate explosion-proof measures should be taken: When the sawing and alloy dust removal adopts a cross-type dust removal device, the dust collector shall meet the requirements of GI3/T-7919. 9.2.4 The dust removal system shall be implemented in accordance with 3.3.
9.2.5 The entire dust collector system should maintain good electrical connections and be reliable. 9.2.6 The dust collector should be equipped with an internal flag sensor and a display instrument. The alarm value should be 5 times lower than the minimum temperature of the dust cloud or dust source. 9.3 Accumulation cleaning
9.3.1 The system should be cleaned regularly when the system is shut down and the power supply is cut off. The floor cleaning should be carried out according to 9.3.2. The dust in the dust collector should be emptied regularly: 9.3.2 plus 1 and The dust just discharged should be collected into a special metal container with a non-sparking conductive shovel and soft broom or natural fiber hard brush. 9.3.3 Do not use water directly in the production area. When cleaning dust, the following conditions should be met. Once approved by the person in charge of the project and the cleaning time is determined: 1. The staff has been trained!
The county should use a good ventilation system with a gas concentration of less than the lower explosion limit: The water used to clean the dust must be discharged to a safe place. 9.3.4 Do not use compressed air to sweep the dust. 9.4 Basic requirements
Regularly take measures to clean the dust. The dust inside the equipment should be removed when the production equipment is idling. 10 Heating
10.1 The workshop should be heated by indirect heating, water heater or steam heater. 10.2 The following provisions should be observed when using a water heater as a heat exchanger: The heating pipes should be clear: The steam or hot water pipes and heat exchange devices should not be placed in workshops with explosion hazards: The pipes and radiators and their joints should not be filled with water or air. 10.3 When using direct heating, the following provisions should be observed: The heat source should be located in a dust-free area
The fan that transports hot air should be dust-free all year round: Low heat The air outside the workshop should be dust-free and ensure that the hot air will not be cold when it contacts the magnesium powder. 11. Physical protection
11.1 Production personnel should use labor protection products according to the relevant provisions of the State Council, GB17269-2003
11.2 In the process flow, the place where the air is used should be equipped with a re-absorption protection device or strengthen the wind. 11.3 The clothes of system operators should be made of cloth that is resistant to static electricity and is not easy to generate static electricity. At the same time, they should be clean and taken off immediately. 11.4 System operators should wear casual shoes and socks 12 Fire
2. 1. Fire personnel should be trained and fire equipment and fire extinguishers should be readily available. Fire extinguishing methods that cause dust accumulation should not be used. 12. 4. Water foam or oxygen extinguishing belts should not be used quickly. Enterprises should formulate fire and disaster relief plans and conduct regular exercises under the cooperation and guidance of local fire departments. 12. 5.~1500P, when it still cannot reach the desired value after multiple adjustments, the machine should be stopped immediately for processing. Before starting the powder making equipment, all relevant personnel should be notified. After normal operation, the operation should be checked once every 30itt--6Cin. When the humidity, pressure or gas concentration at the specified point is not in compliance with the standard, it should be adjusted in time. If the adjustment is ineffective, the machine should be stopped immediately for processing: When the ball mill is started, no one is allowed to work in the ball mill room: When the machine system uses the powder selection ceremony, check if there are any abnormalities on the rotor and shell of the powder selection machine. The general sequence of starting the equipment is: selector, blower, pump, ball mill, feeder, storage car: grinder, fan seal head material temperature: lead powder grinding is not more than 75, aluminum alloy powder grinding is not more than 5: ": The equipment should be stopped before replacing the seal, and the cumulative temperature should be kept When the temperature drops to room temperature, replace the filler. When changing materials, the stator oil or machine flushing should be done. The taken out filler should be put into the oil immediately. When the ball mill system needs to be opened to deal with the blockage of the ball mill system, the temperature of the ball mill system should be reduced to room temperature. When dealing with the blockage, the dust should be stopped and explosion-proof tools should be used. 7.3.3 The powder treatment of magnesium alloy powder should comply with the relevant provisions of 7.3.2. 7.3.4 The granulation of aluminum powder should comply with the following provisions:
GB17269—2003
- Do not add smoke and wet bait into the furnace: During the printing process, no flame should be emitted around the melting point; - Before granulation, the pressure should be tested and the granulation chamber should be inspected. After confirming safety, the dust on the diffusion plate should be blown clean, and then the fan of the granulation chamber should be turned on for granulation:
- No positive gas is generated in the granulation chamber. ;
When sparks are found, granulation should be stopped immediately. 7.3.5 When milling to produce magnesium powder, the temperature of the milled magnesium ring should not exceed 120℃. 7.3.6 When processing high-speed continuous volute magnesium powder unit, the following regulations should be observed: 1. The starting equipment sequence is fan, cooling water valve, magnesium powder machine, elevator, milling machine, and the storage sequence is the opposite; when the equipment is not running, when the temperature of the magnesium powder machine fan rises by more than 40 or the exhaust gas and powder mixer temperature rise by more than 5 degrees, the equipment should be stopped and production should resume!
When the equipment is running, the unit should be observed at any time, and if any abnormality is found, it should be stopped immediately for processing. 7.4 Loading and discharging
7.4.1 The packaging or containers used to hold aluminum-magnesium powder should be made of non-flammable conductive materials. 7.4.2 When loading and discharging, the entire powder packaging container should be electrically connected to the equipment and connected statically 8. In-factory transportation
B.1 Wheeled containers and carts for loading eggs
All types of compact and technical containers, automatic loading vehicles, etc. should be grounded electrostatically. 2.2 Pneumatic conveying
2.2.1 When air is used as the conveying gas, the concentration of aluminum and aluminum alloy powder in the conveying system should be lower than the lower explosion limit of 5°C, and the concentration of magnesium powder should be lower than the lower explosion concentration.
2.2 When the concentration of lead and lead-magnesium alloy powder conveyed by the drum is close to reaching the lower explosion concentration, the ambient gas such as argon should be used as the conveying medium. The oxygen concentration in the ambient gas should meet the requirements of 7.3.2, and the oxygen concentration in the ambient gas should be monitored by the line. B.2.3 If the conveying gas comes from a relatively cold environment, and the temperature of the duct and the dust collector is relatively constant, measures should be taken to prevent the water vapor in the conveying gas from condensing.
B.2.4 To avoid the deposition of aluminum and magnesium powder in the pipeline: the conveying gas should have a high flow rate. The aluminum and magnesium alloy powder should be greater than 19mF/m3
B.3 Pneumatic conveying pipeline
8.3.1 When air is used as the bulk medium, the conveying pipeline should be opened with a vent. The specific opening position must comply with the provisions of GB/T1C5.
8.3.2 In areas where pipeline rupture may cause damage to equipment or personnel but cannot be fully depressurized through the vent, the pipeline should be able to withstand the following internal pressure (gauge pressure): 60kPE for aluminum and magnesium alloy powder, 860kPE for aluminum and magnesium alloy powder. If the pipeline rupture does not cause a serious risk to equipment or personnel, a pipeline with a lower internal pressure can be used as an auxiliary vent. 8.3.3 The pipeline should be made of conductive materials that do not produce combustion and non-conductive materials should not be used. 8.3.4 The pipelines should be connected to the ground at the same potential. 8.3.5 When installing the conveying pipeline in the tower or in the environment of the tower, the air should be prevented from entering. 8.4 Pneumatic tower fan
8.4.1 The blades of the fan should be made of conductive and spark-free materials and the fan should meet the dust protection requirements. 8.4.2 The fan should be interlocked with the aluminum and magnesium powder handling equipment. When the fan stops, the handling equipment should be able to stop automatically. 8.5 Storage
8.5.1 The packaged aluminum powder should be stored in a dry place. 8.5.2 The packaging or containers containing explosives should be placed 1m away from the door and heat source. A small passage of 0.00m should be left between every two rows of containers. The safety door or fire passage should be blocked. GB17269-2003
8.5.3 In order to prevent local heating of products from causing fire, regular inspections should be carried out (such as inspection by hand). If the temperature rises, the product should be immediately disinfected and moved to a safe place until it is refrigerated. 9 Ventilation and dust removal
9.1 General requirements
The workshop should have a suitable ventilation area to ensure good ventilation: 9.2 The dust removal area should be equipped with a dust collector. 9.2.2 Dust explosion-proof fans should be used and the fan should be equipped with dust removal. 9.2.3 The dust collector shall meet the following requirements:
The dust collector should be located at an appropriate position in the workshop. If it is located in the process, appropriate explosion-proof measures should be taken: When the sawing and alloy dust removal adopts a cross-type dust removal device, the dust collector shall meet the requirements of GI3/T-7919. 9.2.4 The dust removal system shall be implemented in accordance with 3.3.
9.2.5 The entire dust collector system should maintain good electrical connections and be reliable. 9.2.6 The dust collector should be equipped with an internal flag sensor and a display instrument. The alarm value should be 5 times lower than the minimum temperature of the dust cloud or dust source. 9.3 Accumulation cleaning
9.3.1 The system should be cleaned regularly when the system is shut down and the power supply is cut off. The floor cleaning should be carried out according to 9.3.2. The dust in the dust collector should be emptied regularly: 9.3.2 plus 1 and The dust just discharged should be collected into a special metal container with a non-sparking conductive shovel and soft broom or natural fiber hard brush. 9.3.3 Do not use water directly in the production area. When cleaning dust, the following conditions should be met. Once approved by the person in charge of the project and the cleaning time is determined: 1. The staff has been trained!
The county should use a good ventilation system with a gas concentration of less than the lower explosion limit: The water used to clean the dust must be discharged to a safe place. 9.3.4 Do not use compressed air to sweep the dust. 9.4 Basic requirements
Regularly take measures to clean the dust. The dust inside the equipment should be removed when the production equipment is idling. 10 Heating
10.1 The workshop should be heated by indirect heating, water heater or steam heater. 10.2 The following provisions should be observed when using a water heater as a heat exchanger: The heating pipes should be clear: The steam or hot water pipes and heat exchange devices should not be placed in workshops with explosion hazards: The pipes and radiators and their joints should not be filled with water or air. 10.3 When using direct heating, the following provisions should be observed: The heat source should be locate
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