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Air-swept Coal Mill

Air-swept Coal Mill

Production Capacity: 8–43 t/h

Feeding size: <25 mm

Main motor: 250–1250 kw

Weight: 46–220 t



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Overview

Air-swept Coal Mill Introduction

Air-swept coal mill is used to grind and dry various coals; mainly composed of feeding device, main bearing, rotating part, gear, discharging equipment, high-voltage start-up device and lubrication system. Air-swept coal mill is widely used in industries of cement, power generation, metallurgy industry, chemical industry, etc., with reasonable structure and high grinding efficiency; it is the ideal equipment for coal preparation.

Air-swept Coal Mill Features

Coal mill is with rim drive, motor drives the grinding mill to rotate through reducer and gears. Grinding storehouse adopts modular layout so that coal mill has greater adaptability to the moisture of raw coal, improving the mill's grinding capacity. Feeding device is with oblique blinds structure which enhances the heat exchange capacity of grinding mill and effectively prevents materials blocking inlet.

Air-swept Coal Mill Working Principle

The raw coal goes into the feeding device of the grinding mill from the feeding equipment, and at the same time, the hot air with the temperature about 300℃ also goes into the feeding device through the air line. The lifting board specially set inside the drying cabin lifts the raw coal, and the raw coal will conduct strong heat exchange here and be dried, and the dried coal sheet goes into the grinding cabin through the double-deck partition board with lifting board.

Inside the grinding cabin, there are grinding media (steel balls), and the coal sheet will be crushed and ground to coal powders here. While the coal sheet is crushed, the specialized draft fan will bring the crushed coal powders and air through the discharging device of the grinding mill out of the grinding mill, and the coarse particles will be returned by the returning spiral of the discharging device to the grinding cabin to be crushed again.

Technical Datas of Air-swept Coal Mill

Spec.£¨m£©
Item
Φ2.2×4.4 Φ2.4×4.75 Φ2.4×4.5+2 Φ2.5×3.9 Φ2.6×5.25+2.25 Φ2.8×5+3 Φ2.9×4.1 Φ3.0×6+3 Φ3.2×6.75+2 Φ3.4×6+3 Φ3.8×7+2.5 Φ3.8×7.25+3.5
Speed(r/min) 22.4 20.4 20.4 20 19.7 18.3 18.8 17.3 16.9 17.5 16.4 16.4
Capacity(t/h) 8¡«9 12¡«14 11¡«12 10 13¡«14 16¡«17 14¡«16 19¡«20 27¡«29 28¡«30 38¡«40 41¡«43
Fineness R80 £¨%) 10-12 8-10 8-10 8-10 8-10 8-10 8-10 8-10 8-10 12 12 12
Feeding Size(mm) £¼25 £¼25 £¼25 £¼25 £¼25 £¼25 £¼25 £¼25 £¼25 £¼25 £¼25 £¼25
Grinding Media Loading£¨t£© 20 22 22.5 22 28 32 35 43 50 55 80 85
Mositure£¨%£© Inlet £¼10 £¼10 £¼10 £¼10 £¼10 £¼12 £¼10 £¼10 £¼10 £¼12 £¼12 £¼12
Outlet £¼2 £¼2 £¼2 £¼2 £¼2 £¼2 £¼2 £¼2 £¼2 £¼2 £¼2 £¼2
Temp.£¨¡æ£© Inlet £¼350 £¼350 £¼350 £¼350 £¼350 £¼350 £¼350 £¼350 £¼350 £¼350 £¼350 £¼350
Outlet 60¡«80 60¡«80 60¡«80 70¡«90 70¡«90 60¡«80 60¡«80 70¡«90 80¡«90 60¡«80 60¡«80 60¡«80
Main Reducer ZD60 ZD60 ZD60

ZD60 MBY450

ZD70
MBY450

ZD70 MBY500 ZD80 MBY560 ZD80 MBY560 JDX630 JDX710 MBY710 MBY800
Main Motor£¨kw) 250 280 315 315 400 500 500 630 710 800 1250 1400
Weight£¨t£© 46 54 76 62 98 107 78 124 148 162 178 220

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Tel: +86-21-58386176 Email: [email protected]

Add: No.416 Jianye Road, South Jinqiao Area,Pudong New Area, Shanghai, China.   Site Map