Some standard content:
Chemical Industry Standard of the People's Republic of China
HG/T 2470-93
Disc-type airflow mill
Published on 1993-06-30
Implemented on 1994-01-01
Published by the Ministry of Chemical Industry of the People's Republic of China. Standards on the website of m.bzzo
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Chemical Industry Standard of the People's Republic of China
Disc-type airflow mill
HG/T2470-93
This standard specifies the design, manufacture, test methods, inspection rules, marking, packaging, transportation and storage of disc-type airflow mills. This standard applies to disc-type airflow mills (hereinafter referred to as disc-type airflow mills) for ultra-fine grinding of materials with a Mohs hardness of no more than 9 Referred to as crusher),
2 Reference standards
GB1800
GB3768
GB6388
ZBG90005
HG2-538
HG2-539
Terms and symbols
Grinding chamber
Packaging storage and transportation pictorial symbols
Standard tolerance and basic deviationbzxz.net
Simple method for determining the sound power level of noise source
Transport packaging receiving and shipping marks
Terms and terms of ultra-fine grinding machinery
PTFE plates, rods and filler products
Size range and use of PTFE parts Cavity for crushing and grading materials.
3.2 Working medium
Compressed gas or superheated steam used to generate high-speed airflow, also known as energy carrier, 3.3 Classification circle
The jet flow axes of each working medium in the pulverizer are tangent to the same circle, which is called the classification circle. 3.4 Internal classification and return material structure
The material particles crushed in the pulverizing chamber are classified by the classification chamber, and the fine particles are discharged from the outlet pipe and collected as finished products; the coarser particles enter the nozzle outlet of the pulverizing chamber or the supersonic nozzle diffusion section under the action of centrifugal force and are crushed again. This structure is called the internal classification and return material structure.
4 Design
4.1 Schematic diagram of the structure of the pulverizer
1993-06-30 approved by the Ministry of Chemical Industry of the People's Republic of China.
D.com-All kinds of standard industry information are free to download 1994-01-01 implementation
247093
Wei products and gases
(into the capture system)
1-jet feeder; 2-crushing Chamber; 3 nozzle; 4-gas and powder outlet; 5-nozzle seat ring, upper cover, lower cover and inner village; 6-grading circle 4.2 Model representation method
Inner lining material code
Grinding chamber diameter mm
Including internal grading and returning material structure is represented by N
No internal grading and returning material structure is not represented
Indicates disc type
Air flow mill code
Basic parameters (see Table 1)
QY1 000
Design pressure
Air consumption
Nm/min
Processing capacity
-C Engineering ceramics
Polytetrafluoroethylene
G Alloy steel or carbon steel
-B Stainless steel
A Polyurethane
T Other materials
Feed particle size
Note: ① If other working fluids are used or materials with special requirements are crushed, the following table Parameters can be changed② Feed and finished product particle size refers to the weight median diameter d50 or weight average particle size.4.4 Working conditions
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Finished product particle size
4.4.1 Material to be crushed (hereinafter referred to as material) HG/T2470-93
8. The particle size of the material shall comply with the provisions of feed particle size in Table 1 of 4.3, b. The moisture content of the material shall not exceed 3%.
C. Materials that do not meet the above two provisions shall be tested to determine whether they are applicable. 4.4.2 Working fluid
a. The working fluid should be dry and clean, with a water content of no more than 1g/Nm2 (excluding superheated steam); oil content of no more than 5mg/Nm; dust content of no more than 5mg/Nm2.
b. The pressure should remain stable during operation, and the fluctuation range should not exceed 0.03MPa. 4.4.3 Supporting equipment
, the feeder must ensure that the material can enter the crusher continuously and evenly, and can adjust the feed amount steplessly. b. The air compressor must ensure that the exhaust volume and exhaust pressure are stable. The air dryer must ensure that the working fluid at its outlet meets the requirements of Article 4.4.2, and the pressure drop of the inlet and outlet working fluid is no more than C
d. The total collection rate of the finished products of the cyclone separator and bag collector is above 99%, and the dust content of the final gas emission must be lower than the relevant provisions of the national emission standards.
c. The pressure drop of the inlet and outlet working fluid of the bag collector should be lower than 0.002MPa. 4.5 Basic requirements
The design and manufacture of the pulverizer shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.6 Materials
4.6.1 The inner lining of the nozzle seat ring, upper cover, lower cover, jet feeder and discharge pipe of the pulverizer can be made of engineering ceramics, polytetrafluoroethylene, polyurethane, stainless steel, alloy steel, high-quality carbon steel, etc., depending on the different materials to be pulverized, or the surface of the parts in contact with the material can be sprayed (or welded) with hard alloy.
4.6.2 The nozzle of the pulverizer can be made of stainless steel, alloy steel, tool steel, high-quality carbon steel and engineering ceramics, etc. 4.6.3 When using high-temperature gas (superheated steam, hot air, etc.) as the working medium, the material's decomposition performance and the sealing of the parts connection must be considered.
4.7 Purchased parts
4.7.1 The operating valve should be flexible and leak-free. 4.7.2 The control and measuring instruments should be sensitive and accurate within the adjustment range. 5 Manufacturing and assembly
5.1 Appearance quality
. The non-machined surface should not have appearance defects such as nodules, depressions and pores. b. The non-machined outer surface of stainless steel should be polished or pickled and passivated. c. For parts with painted (or sprayed with powder coating), the paint layer or powder coating layer should be firmly bonded, the surface should be flat, smooth and of uniform color.
d. The weld seam of welded parts should be flat and smooth, and slag and spatter should be removed. 5.2 Main components
. The dimensional tolerance grade of the nozzle throat diameter shall not be lower than IT12 grade in GB1800. b. The inner surface roughness of metal nozzles shall not exceed Ra1.6μm; the inner surface roughness of non-metallic nozzles shall not exceed Ra3.2um. c The axis of each nozzle installation hole in the seat ring should be located in the same plane, and the parallelism of the axis relative to the reference plane for a length of 100mm from the exit of the hole should not exceed 0.5mm
d. The dimensional tolerance grade of the diameter of the grading circle in the crushing chamber shall not be lower than IT11 grade in GB1800, and the standard is HG/T2470-93
e. The working surface of the lining shall not have defects such as cracks, pores, slag inclusions, and gaps. The hardness of the corundum lining shall not be less than HRA85.
When the surface of a part is sprayed with cemented carbide, the tungsten carbide content of the spray layer shall not be less than 45%; the surface hardness of the spray layer shall not be less than HRC50
h. The hardness of the polyurethane lining shall not be less than Shore (A) 95.1 The polytetrafluoroethylene lining shall comply with the provisions of HG2-538 and HG2-539. 5.3 Water pressure test
The working fluid storage and distribution components of the pulverizer must be subjected to a water pressure test (non-welded parts are not required). 5.4 Air tightness test
After the pulverizer is assembled, the entire machine must be subjected to an air tightness test. 5.5. Material experiment
When testing the material of the crusher, calcite powder (purity not less than 99%) is used as the calibration material to determine its processing capacity and the particle size of the finished product. 5.6 Noise
When the crusher is working normally, the noise (sound power level) should not be greater than 80dB (A). 5.7 Life
Under normal working conditions, the calibration material calcite powder is crushed with a crusher equipped with corundum lining (must comply with the relevant data in Table 1 of 4.3). The working life of the crusher (excluding the replacement of wearing parts) is not less than 6000h. 6 Test method
6.1 The supporting equipment (including various requirements for working fluids) must have various quality certification documents provided by the manufacturer. 6.2 The particle size of the feed material and the finished product shall be tested by sieving, sedimentation or resistance change measurement; the moisture content of the material shall be measured by a moisture meter.
6.3 Materials and purchased parts must have a quality guarantee.6.4 Visual quality measurement of appearance,
6.5 Measurement of main parts.
6.5.1 The nozzle throat diameter shall be measured by a standard core rod calibrated regularly by the metrology department,6.5.2 The roughness of the inner surface of the nozzle shall be determined by comparison with a sample block6.5.3. The parallelism measurement method of the axis of each nozzle installation hole in the seat ring: put the seat ring on the flat plate, insert the standard mandrel regularly calibrated by the metrology department into the nozzle installation hole, and measure the parallelism of the axis of each nozzle installation hole ten by ten.
6.5.4. The measurement method of the diameter of the grading circle in the crushing chamber: according to the method in 6.5.3, after inserting the standard mandrel into the spray installation hole, use a vernier caliper to measure the distance between the outer (or inner) of the two symmetrical mandrels, and then subtract (or add) the diameter of the standard mandrel, which is the diameter of the grading circle. 6.5.5. In addition to the quality certificate provided by the manufacturer, the surface quality of the working surface is visually determined. 6.5.6. The hardness of the corundum lining is measured by a Rockwell hardness tester, and the surface hardness of the carbide spray layer is measured by a Rockwell hardness tester. 6.5.8. The hardness of the polyurethane lining is measured by a Rockwell hardness tester. 6.5.9. The quality certificate of the polytetrafluoroethylene lining is provided by the manufacturer. 6.6 Water pressure test
It shall be carried out at 1.25 times of the design pressure (including using superheated steam or other compressed gas as the working fluid), and the pressure shall be maintained for 30 minutes. No leakage and abnormal noise are allowed.
6.7 Air tightness test method
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Under the design pressure, use soap solution or other leakage inspection liquid to check the sealing surfaces of the grinder. No leakage is allowed. When the air tightness test of the pulverizer is carried out, it is also necessary to check whether there is negative pressure at the feed port of the jet feeder. If there is no negative pressure, the position of the feed nozzle in the jet feeder must be adjusted or other relevant measures must be taken. 6.8 Material test method
Calcite powder is used as the calibration material. Under various working conditions (except the finished product particle size) that meet the requirements of Table 1 in 4.3 and Article 4.4, the pulverizer is subjected to material test. The normal operation time is not less than 20 minutes. The particle size of the calcite powder after crushing should not be greater than 20um (ds or d). 6.9 The determination of pulverizer noise shall be carried out in accordance with the provisions of GB3768. 6.10 The assessment method for the life of the pulverizer is user visit or quality tracking of the manufacturing unit. 7 Inspection rules
7.1 Factory inspection
7.1.1 Each crusher shall be inspected and certified by the quality inspection department of the manufacturer in accordance with the standards and relevant technical documents before it can be shipped
7.1.2 Factory inspection shall be carried out in accordance with the requirements of 4.6~4.7, 5.1~5.4 and 5.6. 7.2 Type inspection
7.2.1 The product shall be subjected to type inspection in any of the following situations: a. When a new product is trial-produced, finalized or identified; b. When the design, process or key materials are changed and may affect its performance; c. When production is resumed after being suspended for more than one year; d. When the national quality supervision department proposes to conduct type inspection. 7.2.2 In addition to the contents of Article 7.1.2, the type inspection items shall also be carried out in accordance with the contents of Articles 5.5 and 5.6. 7.2.3 Sampling method
Each type inspection shall be sampled from the qualified products of the factory inspection. The number of samples shall not be less than 10%, and at least one unit shall be sampled. 7.2.4 Judgment rules
If there are unqualified items in the sampled samples, the batch of products shall be doubled and the unqualified items shall be rechecked. If they are still unqualified, the batch of products shall be unqualified products.
8 Marking, packaging, transportation and storage
8.1 Marking
8.1.1 Product nameplate
A nameplate should be installed at a conspicuous position of the crusher, and the content should include: product model and name;
Design pressure MPa;
Air consumption
Nm2/min;
Manufacturer name;
f. Factory number;
g. Manufacturing date;
h. Trademarks,
8.1.2 Packaging marks
Should comply with the requirements of GB191 and GB6388,
8.2 Packaging
Standards.bzsonn.cem Various standards industry information free download 1 Packaging materials and requirements
HG/T2470-93
The product is packed in wooden boxes or other strong boxes. The crusher must be fixed in the box and covered with plastic bags. All the inner surfaces of the box are covered with oil felt. The bottom of the box must have feet and positions for lifting or shoveling. 8.2.2 Random documents
8. Qualified manual (the name, code and number of the implementation standard should be marked); b. Instructions for use (including installation, operation, maintenance, list of wearing parts, etc.); c. Packing list
The random documents should be covered with plastic bags and placed in the box. 8.3 Transportation
8.3.1 The crusher should be protected from rain, snow and mechanical collision during transportation. 8.3.2 Severe shaking should be avoided during transportation.
8.4 Storage
8.4.1 The crusher should be stored in a rainproof warehouse, which should be kept dry. 8.4.2
The non-stainless steel connecting parts of the crusher should be coated with anti-rust grease during storage. Additional remarks:
This standard was proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the Chemical Machinery Research Institute of the Ministry of Chemical Industry. This standard was drafted by Shanghai Chemical Machinery Plant No. 3, and the main drafter of this standard is Li Songbiao.
Standards.com ba.cem All kinds of standard industry data are available for free download People's Republic of China
Chemical Industry Standards
Disc Airflow Mill
HG/T2470-93
Editor China Chemical Equipment Corporation
Postal Code 100011
Printed by Beijing Institute of Chemical Technology Printing Factory
Copyright reserved
, no reproduction allowed
Format 880×1230
First edition in June 1994
Printing sheet 0.5
12 thousand words
First printing in June 1994
Standards.com mbzaim All kinds of standard industry data are available for free download3 Sampling method
Each type inspection shall be sampled from qualified products of factory inspection, the number of sampled shall not be less than 10%, and at least one machine shall be sampled. 7.2.4 Judgment rules
If there are unqualified items in the sampled samples, the batch of products shall be doubled for sampling and rechecking the unqualified items. If it is still unqualified, the batch of products shall be unqualified products.
8 Marking, packaging, transportation and storage
8.1 Marking
8.1.1 Product nameplate
A nameplate shall be installed in a conspicuous position of the crusher, and the content shall include: product model and name;
Design pressure MPa;
Gas consumption
Nm2/min;
Manufacturer name;
f. Factory number;
g. Manufacturing date;
h. Trademarks,
8.1.2 Packaging marks
Should comply with the requirements of GB191 and GB6388,
8.2 Packaging
Standards.bzsonn.cem Various standards industry information free download 1 Packaging materials and requirements
HG/T2470-93
The product is packed in wooden boxes or other strong boxes. The crusher must be fixed in the box and covered with plastic bags. All the inner surfaces of the box are covered with oil felt. The bottom of the box must have feet and positions for lifting or shoveling. 8.2.2 Random documents
8. Qualified manual (the name, code and number of the implementation standard should be marked); b. Instructions for use (including installation, operation, maintenance, list of wearing parts, etc.); c. Packing list
The random documents should be covered with plastic bags and placed in the box. 8.3 Transportation
8.3.1 The crusher should be protected from rain, snow and mechanical collision during transportation. 8.3.2 Severe shaking should be avoided during transportation.
8.4 Storage
8.4.1 The crusher should be stored in a rainproof warehouse, which should be kept dry. 8.4.2
The non-stainless steel connecting parts of the crusher should be coated with anti-rust grease during storage. Additional remarks:
This standard was proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the Chemical Machinery Research Institute of the Ministry of Chemical Industry. This standard was drafted by Shanghai Chemical Machinery Plant No. 3, and the main drafter of this standard is Li Songbiao.
Standards.com ba.cem All kinds of standard industry data are available for free download People's Republic of China
Chemical Industry Standards
Disc Airflow Mill
HG/T2470-93
Editor China Chemical Equipment Corporation
Postal Code 100011
Printed by Beijing Institute of Chemical Technology Printing Factory
Copyright reserved
, no reproduction allowed
Book size 880×1230
First edition in June 1994
Printing sheet 0.5
12 thousand words
First printing in June 1994
Standards.com mbzaim All kinds of standard industry data are available for free download3 Sampling method
Each type inspection shall be sampled from qualified products of factory inspection, the number of sampled shall not be less than 10%, and at least one machine shall be sampled. 7.2.4 Judgment rules
If there are unqualified items in the sampled samples, the batch of products shall be doubled for sampling and rechecking the unqualified items. If it is still unqualified, the batch of products shall be unqualified products.
8 Marking, packaging, transportation and storage
8.1 Marking
8.1.1 Product nameplate
A nameplate shall be installed in a conspicuous position of the crusher, and the content shall include: product model and name;
Design pressure MPa;
Gas consumption
Nm2/min;
Manufacturer name;
f. Factory number;
g. Manufacturing date;
h. Trademarks,
8.1.2 Packaging marks
Should comply with the requirements of GB191 and GB6388,
8.2 Packaging
Standards.bzsonn.cem Various standards industry information free download 1 Packaging materials and requirements
HG/T2470-93
The product is packed in wooden boxes or other strong boxes. The crusher must be fixed in the box and covered with plastic bags. All the inner surfaces of the box are covered with oil felt. The bottom of the box must have feet and positions for lifting or shoveling. 8.2.2 Random documents
8. Qualified manual (the name, code and number of the implementation standard should be marked); b. Instructions for use (including installation, operation, maintenance, list of wearing parts, etc.); c. Packing list
The random documents should be covered with plastic bags and placed in the box. 8.3 Transportation
8.3.1 The crusher should be protected from rain, snow and mechanical collision during transportation. 8.3.2 Severe shaking should be avoided during transportation.
8.4 Storage
8.4.1 The crusher should be stored in a rainproof warehouse, which should be kept dry. 8.4.2
The non-stainless steel connecting parts of the crusher should be coated with anti-rust grease during storage. Additional remarks:
This standard was proposed by China National Chemical Equipment Corporation. This standard is under the jurisdiction of the Chemical Machinery Research Institute of the Ministry of Chemical Industry. This standard was drafted by Shanghai Chemical Machinery Plant No. 3, and the main drafter of this standard is Li Songbiao.
Standards.com ba.cem All kinds of standard industry data are available for free download People's Republic of China
Chemical Industry Standards
Disc Airflow Mill
HG/T2470-93
Editor China Chemical Equipment Corporation
Postal Code 100011
Printed by Beijing Institute of Chemical Technology Printing Factory
Copyright reserved
, no reproduction allowed
Book size 880×1230
First edition in June 1994
Printing sheet 0.5
12 thousand words
First printing in June 1994
Standards.com mbzaim All kinds of standard industry data are available for free download
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