Some standard content:
ICS73.120
Machinery Industry Standard of the People's Republic of China
JB/T1386—1999
Ball mill for coal grinding
Issued on 1999-06-28
State Bureau of Machinery Industry
Implementation on 2000-01-01
JB/T1386-1999
This standard is a revision of JB1386-74 "Ball mill for coal grinding". Compared with JB1386-74, the main technical content of this standard has been changed as follows: - According to the progress of technology and the needs of the development of the power industry, the specifications and models of coal mills have been expanded: the model representation method has been standardized in accordance with the provisions of JB/T1604-1998 "Method for Compiling Models of Mining Machinery Products": the detailed and rigid provisions that restrict the development of technology, such as the specific structural form, size, tolerance, roughness, and heat treatment hardness of parts, have been greatly reduced in accordance with 4.1.2 of GB/T1.3-1997. This standard replaces JB1386-74 from the date of implementation. This standard is proposed and managed by the National Technical Committee for Standardization of Mining Machinery. The drafting unit of this standard: Jiaozuo Mining Machinery Co., Ltd. (Jiaozuo Mining Machinery Factory). The main drafters of this standard: Yin Yucai, Deng Yunwan, Li Mingxian, Guo Ming. 1 Scope
Machinery Industry Standard of the People's Republic of China
Ball mill for coal grinding
JB/T 13861999
Replaces JB[386—74
This standard specifies the type and basic parameters, technical requirements, test methods, inspection rules, marking, packaging, transportation, storage and manufacturing guarantee of ball mills.
This standard applies to ball mills (hereinafter referred to as coal mills) in the intermediate storage silo type pulverizing system for grinding coals of various hardness, but does not apply to double-inlet and double-outlet ball mills.
2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest versions of the following standards. GB 191—1990
GB/T 700—1988
GB/T 1174—1992
GB/T 3077--1988
GB/T 3323—1987
GB/T 3768—1996
GB/T 5680—1998
GB/T 7233—1987
GB/T9439—1988
GB/T 9443—1988
GB/T 9444-1988
GB/T10095—1988
GB/T11345—1989
GB/T 11352—1989
GB/T 13306—1991
GB/T 13384-1992
JB/T 16041998
JB/T 7031-1993
JB/T 7128—1993
Packaging, storage and transportation pictorial symbols
Carbon structural steel
Casting bearing alloys
Technical conditions for alloy structural steel
Radiography and quality classification of steel fusion welded butt jointsAcousticsDetermination of sound power level of noise source by sound pressure methodSimple method of measuring surface by envelope above reflecting surfaceHigh manganese steel castings
Ultrasonic flaw detection and quality rating standard for steel castingsGray iron castings
Method for rating of flaw indication marks for steel castingsMagnetic particle flaw detection and quality rating method for steel castingsPrecision of involute cylindrical gearsWww.bzxZ.net
Method for manual ultrasonic flaw detection of steel welds and classification of flaw detection resultsCasting carbon steel parts for general engineering
Machine General technical conditions for packaging of electrical products
Comprehensive method for model formulation of mining machinery products
Large mill end cover steel castings
Technical conditions for three-phase asynchronous motors for YTM, YHP and YMPS series coal mills Approved by the State Bureau of Machinery Industry on 1999-06-28 and implemented on 2000-01-01
3 Types and basic parameters
3.1 Type
JB/TI386-1999
3.1.1 The type of coal mill is shown in Figure 1, which does not specify its specific structure. 1 - Feeding part: 2 - Bearing part; 3 - Transmission part: - Rotating part: 5 - End energy pipe: 6 - Discharging part: 7 Reducer: 8 - Motor diagram!
3.1.2 The transmission arrangement of the coal mill can be divided into left-mounted, right-mounted, internal transmission and external transmission from the feed end to the discharge end (see Figure 2). The arrangement of the transmission must be indicated when ordering.
! 1) Left-mounted external transmission
3) Right-mounted external transmission
? 》Left-mounted internal transmission
1 Right-mounted internal transmission
3.2 Basic parameters
JB/T 13861999
The basic parameters of the coal mill shall comply with the provisions of Table 1. Table 1
Basic parameters of coal mill
MG-1722
MG-1725
MG-2126
MG-2133
MG2532
MG-2539
MG-2935
MG2941
MG-2947
MG-3247
MG3258
MG-3560
MG G-3570
MG-3865
MG-3872
MG3879
MG-3886
Production capacity
Simplified volume
Upper speed
Maximum ball loading
Electrical average rate
Machine weight
1The production capacity in the table is the approximate production capacity when the coal grindability index Kvm=1.0, total moisture M=10%, external moisture M=7%, air-dried basic moisture M. -2%, coal particle size R, -20%, coal powder fineness R. =8%, and maximum ball loading. 2The motor power refers to the maximum power of the installed motor selected in accordance with JB/T7128. 3The machine weight is the reference weight excluding the motor, electronic control and grinding body (steel ball) 3. 3
Model indication method
The coal mill model shall comply with the provisions of JB/T1604, and the model indication method is as follows: M
Effective length of cylinder, dm
Effective diameter of cylinder, dm
Steel ball (steel)
Coal mill (mill)
Note: The effective diameter of cylinder refers to the average point diameter of the wave crest and trough of the cylinder lining; the effective length of cylinder refers to the length between the flange planes at both ends of the cylinder 3
3.4 Marking example
JB/T1386-1999
The steel ball coal mill with an effective diameter of 3500mm and an effective length of 6000mm is indicated as MG-3560 steel ball coal mill
4 Technical requirements
4.1 The coal mill shall comply with the provisions of this standard and be manufactured according to the drawings and technical documents approved by the prescribed procedures. 4.2 The structure of the coal mill should ensure:
a) Long-term normal operation within the ambient temperature range of +45~-20℃; b) The seals of the coal mill feed port and bearings should be able to ensure the use of desiccants below 450℃; c) The joint surfaces of the coal mill should be well sealed and must not leak oil or coal powder; d) The simplified part of the coal mill should have sound insulation and heat preservation devices; e) The bearing linings, inlet and outlet end covers, transmission gears, spiral pipes, etc. of coal mills with the same diameter but different lengths should be interchangeable; f) The lubrication device of the coal mill should be safe and reliable. When the oil volume, oil pressure and oil temperature do not reach the set values, there should be an interlocking device and automatic alarm or shutdown;
g) The rotating part of the coal mill transmission device should be equipped with a protective cover; h) If there are special requirements, the supply and demand parties can negotiate and supplement the regulations. 4.3 The performance of the main bearing lining material shall not be lower than the requirements of HT200 in GB/T9439, and the performance of the bearing alloy shall not be lower than the requirements of ZSnSb11Cu6 or ZPbSb16Sn16Cu2 in GB/T1174. 4.4 The performance of the cylinder steel plate material shall not be lower than the requirements of Q235-B in GB/T700. The strength of the cylinder weld shall not be lower than that of the parent material, and non-destructive testing shall be carried out. The weld quality shall not be lower than Grade II B in GB/T11345 or Grade III in GB/T3323. 4.5. The inlet and outlet covers shall comply with the provisions of JB/T7031. The shaft neck and transition arc area shall be subjected to non-destructive testing. The quality shall not be lower than Grade III in GB/T7233 and Grade II in GB/T9443 or GB/T9444. 4.6 The material performance of the small gear shall not be lower than the provisions of 35SiMn in GB/T3077. 4.7 The material performance of the large gear shall not be lower than the provisions of ZG310~ZG570 in GB/T11352. 4.8 The gear accuracy shall not be lower than the provisions of Grade 9-8-8 in GB/T10095. 4.9 The material performance of the lining shall not be lower than the provisions of ZGMn13-1 in GB/T5680. 4.10 The cooling water channel of the main bearing shall be subjected to a water pressure test and there shall be no leakage. 4.11 The high-pressure lubrication system of the main bearing shall be subjected to an oil pressure test and there shall be no leakage. 4.12 The main bearing operating temperature shall not exceed 60℃, the return oil temperature shall not exceed 50℃, and the return water temperature shall not exceed 40℃. 4.13 The noise of the coal mill when it is running without load (without lining, steel balls and sound insulation and heat preservation devices), its sound pressure level shall not exceed 85dB (A) 4.14 The service life of the coal mill before the first overhaul shall not be less than 16000h. 4.15 The complete set supply scope of the coal mill shall include the machine body, transmission device, motor and basic parts (see Figure 1). 4.16 The manufacturer shall be able to provide slow transmission, screen unloading ball and top tank device, thin oil station and injection lubrication device and external sound insulation protective cover for coal mills above 2900mm, but they are not included in the complete set supply. : 4.17 Each coal mill shall be randomly provided with technical documents such as certificate of conformity, instruction manual, installation drawing, foundation drawing and packing list. 5 Test method
5.1 The coal mill shall be tested according to the test method approved by the prescribed procedure. 4
JB/T1386—1999
5.2 The cooling water channel of the main bearing is tested with a water pressure of not less than 0.5MPa, and the pressure holding time is not less than 30min. 5.3 The high-pressure lubrication system of the main bearing is tested with 1.25 times the rated working oil pressure, and the pressure holding time is not less than 20min. 5.4 The noise of the coal mill during no-load operation shall be tested in accordance with the provisions of GB/T3768. 5.5 The no-load test of the coal mill shall be carried out in sections according to the prescribed procedures, and the continuous operation time shall not be less than 8h. 5.6 Each coal mill can only be tested with load after the user passes the no-load test. The load test shall adopt a step-by-step loading method: first load 20%~30% of the rated load, and then increase the load by 10%~20% every 30min until it is fully loaded and continuously operated for 24h.
6 Inspection rules
6.1 Coal mills shall be shipped after passing the inspection, and documents proving the quality of the products shall be attached when leaving the factory. 6.2 During the no-load test run conducted at the manufacturer, 20% (at least one) of each batch shall be sampled for inspection. If there are any unqualified products, 50% of the batch shall be sampled for further inspection. If there are still unqualified products, all products shall be inspected. 6.3 The no-load test run shall comply with the provisions of a), c), f) of 4.2 and 4.10~4.13. 6.4 The load test run shall comply with the provisions of 5.6, 6.3 and Table 1. 6.5 In the following cases, coal mills shall be subjected to type inspection: a) identification of new products developed or during production conversion; b) after normal production, when there are major changes in structure, materials or processes that may affect performance; c) when the national quality inspection agency proposes type inspection requirements. 6.6 The content of type inspection shall include all requirements of this standard. 7 Marking, packaging, transportation and storage
7.1 Each coal mill shall have a product label fixed in a prominent position. The type and size of the label shall comply with the provisions of GB/T13306, and its contents are as follows: a) Product model and name;
b) Main technical parameters:
c) Factory number;
d) Manufacturing date;
e) Manufacturer name.
7.2 Product packaging shall comply with the provisions of GB/T13384. Each box shall have a label, and its contents are as follows: a) Receiving unit and address:
b) Product name and model:
c) Manufacturer name:
d) Packing box number, external dimensions, gross weight, etc.: e) Lifting operation mark.
7.3 Coal mills shall be packed in boxes according to the packing list. The packaging shall meet the requirements of water and land transportation. 7.4 Storage and transportation signs shall comply with the provisions of GB191. 7.5 During the storage period, the coal mill should be placed in a well-ventilated room or under a shed. Electrical equipment should be protected from moisture, and the product should be placed to prevent extrusion deformation and gravity deformation. Regular inspection and maintenance should be carried out during the storage period to prevent parts from rusting and damage. 5
Manufacturing guarantee
JB/T1386-1999
8.1 The manufacturer shall ensure that the product complies with the provisions of this standard. 8.2 Under the condition that the user complies with this standard and the instruction manual, if the product cannot work normally due to poor manufacturing quality within 18 months from the date of shipment, or within 6 months from the date of production during this period, the manufacturer shall repair or replace damaged parts (excluding wearing parts) for the user free of charge.2 Product packaging shall comply with the provisions of GB/T13384. Each box shall be marked with the following contents: a) Receiving unit and address:
b) Product name and model:
c) Manufacturer name:
d) Packing box number, overall dimensions, gross weight, etc.: e) Lifting operation mark.
7.3 Coal mill shall be packed in boxes according to the packing list. The packaging shall meet the requirements of water and land transportation. 7.4 Storage and transportation marks shall comply with the provisions of GB191. 7.5 During the storage period, the coal mill shall be placed in a well-ventilated room or under a shed. Electrical equipment shall be prevented from moisture. The product shall be placed to prevent extrusion deformation and self-gravity deformation. During the storage period, regular inspection and maintenance shall be carried out to prevent rust and damage of parts. 5
Manufacturing guarantee
JB/T1386-1999
8.1 The manufacturer shall ensure that the product complies with the provisions of this standard. 8.2 Under the condition that the user complies with this standard and the instruction manual, if the product fails to work properly due to poor manufacturing quality within 18 months from the date of delivery, or within 6 months from the date of production during this period, the manufacturer shall repair or replace damaged parts (excluding wearing parts) for the user free of charge.2 Product packaging shall comply with the provisions of GB/T13384. Each box shall be marked with the following contents: a) Receiving unit and address:
b) Product name and model:
c) Manufacturer name:
d) Packing box number, overall dimensions, gross weight, etc.: e) Lifting operation mark.
7.3 Coal mill shall be packed in boxes according to the packing list. The packaging shall meet the requirements of water and land transportation. 7.4 Storage and transportation marks shall comply with the provisions of GB191. 7.5 During the storage period, the coal mill shall be placed in a well-ventilated room or under a shed. Electrical equipment shall be prevented from moisture. The product shall be placed to prevent extrusion deformation and self-gravity deformation. During the storage period, regular inspection and maintenance shall be carried out to prevent rust and damage of parts. 5
Manufacturing guarantee
JB/T1386-1999
8.1 The manufacturer shall ensure that the product complies with the provisions of this standard. 8.2 Under the condition that the user complies with this standard and the instruction manual, if the product fails to work properly due to poor manufacturing quality within 18 months from the date of delivery, or within 6 months from the date of production during this period, the manufacturer shall repair or replace damaged parts (excluding wearing parts) for the user free of charge.
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