Coal Mill

Coal mill is an important auxiliary equipment for coal-powder furnace

Coal Mill

Coal mill, which is also known as coal grinding mill or coal milling machine, is used to pulverize and dry coal before it is blown into the power plant furnace in the coal-fired power plants. Coal mill is an important auxiliary equipment for coal-powder furnace, it has three methods to crush the coal lump and grind them into powder,it is crushing, impacting and grinding.

Coal mill is used to grind, pulverize and dry coal before the coal is transmitted the boiler. The coal is feed into the coal mill via a inlet pipe so that the roller coal mill such as ball mill or vertical mill can pulverize the coal into particles.

Air swept coal mill is the main equipment in cement plant for both drying and grinding of the powders. Compared with the ordinary ball mill, it has advantages of higher capacity, more convenient operation, safer usage, and more reliable performance.

Besides, Zenith's coal mills can be installed with other assistant equipment, such as the bag-type dust collector and electric magnetic iron mover, to meet the requirements of any industry.

Coal Mill Main Benefits And Features

  1. Higher yield;
  2. Convenient operation;
  3. Safer usage;
  4. Reliable performance

How Does The Coal Mill Work?

The raw coal enters the mill via an airtight feed screw and is discharged onto the centre of the rotating grinding table. The rotation of the table accelerates the flow of material towards the grinding track where the coal is ground between the table and the three rollers. The coal then continues over the dam ring and is entrained in the hot drying air that enters the mill house through the nozzle ring.

The air lifts the coarser particles back onto the grinding table and sweeps the finer particles up to the separator that lets the final product proceed to the mill outlet while returning the coarse fraction to the table for further grinding.Having left the mill at the top, the final product continues with the air to a cyclone or a bag filter where it is collected.

Technical Data

Coal Mill
Model specification (m) Capacity (t/h) Rotating speed
(r/min)
Transmission type Motor Reducer Weight(t)
Remark Model Power
(kw)
Model Reduction ratio
φ2.2×3 5-6 22 Edge YR355M-8 185 ZD50 5 37  
φ2.2×4.4 8-9 22 Edge YR355M-6 220 ZDH50 6.3 46  
φ2.4×4.75 14 20.4 Edge YR400-8 280 ZD60 4.5 54  
φ2.4×4+2 10-12 20.2 Edge YRKK450-8 250 ZDY35580 4.5 59  
φ2.4×4.5+2 16-17 20.4 Edge YR4005-8 280 JDX-450 4.5 76  
φ2.6×4.8+2 9-10 20 Edge YRKK5002-8 400 RZD75 4.5 91  
φ2.6×5.25+2.25 13-14 19.7 Edge YRKK500-8 400 ZDY400-4.5-11 4.5 98  
φ2.8×5+3 8-10 18.9 Edge JRQ1512-10 480 MCD-70 3.55 107  
φ3×9 18-20 18.3 Edge YBKK5560-8 630 MBY560 5 124  
φ3.2×9.5 28 17 Edge YR800-8/1180 800 NFM710 6.3 140  
φ3.4×5.25+2.8 30 17.47 Edge YRKK-56-6 900 JDX-800 7.157 169 Exclude main transmission
φ3.8×7.25+3.5 41-43 16.7 Edge YR630-8 1400 MBY800 5.6 220  

Related Grinding Mill: