Air-swept Coal Mill

Feeding Granularity: Φ2.2×4.4m-Φ3.8×7.25+3.5m

Production Capacity: 8-43t/h

Application Range: Widely used in cement building materials, thermal power, metallurgical industry, chemical industry, etc

Features

Brief Introduction

The air-swept coal mill is a kind of equipment that is often used for grinding and drying coal of various hardness. Widely used in cement industry, thermal power, metallurgical industry, chemical industry, the wind-swept coal mill with reasonable structure and high grinding efficiency is the ideal equipment for coal preparation.

Working Principle

This mill is an edge driving system. It is driven by the electromotor through auxiliary support of the speed reducer and different sizes of gears.The grinding machine adopts the air-swept type with drying silos, making the grinding machine more adaptable to the moisture hidden in the crude coal. The combined configuration of the ladder lining board, the double-ladder lining board, corrugated lining board respectively improves the grinding capacity. The feeding device adopts shutter structure in the form of oblique inlet flow, strengthening the heat transfer ability and effectively preventing the feed port plugging. The crude coal gets into the feed port. Meanwhile, the hot air with the temperature of 300 ℃ goes to the same device. The special spread boards in the drying silo lift the coal and through heat exchange, the coal is dried. Then the coal gets into the grinding silo, which is equipped with the grinding medium(steel balls)by the double-deck partition panel. The coal lumps are then crushed into powders. At the same time, the powders will be carried out by the special induced draft fan. The more coarse particles will be withdrawn to the grinding silo for further crushing.

Parameter of Air-swept Coal Mill

Spec. （m）Item	Φ1.7×2.5	Φ2.2×4.4	Φ2.4×4.75	Φ2.4×4.5+2	Φ2.6×5.25+2.25	Φ2.8×5+3	Φ3.0×6.5+2.5	Φ3.2×6.75+2	Φ3.4×6+3	Φ3.8×7+2.5
Speed(r/min)	24.5	22.4	20.4	20.4	19.7	18.3	18.3	16.9	17.5	16.4
Capacity(t/h)	3-5	8-9	12-14	11-12	13-14	16-17	19-20	25-30	28-30	38-40
Feeding Size(mm)	＜25	＜25	＜25	＜25	＜25	＜25	＜25	＜25	＜25	＜25
Grinding Media Loading(t)	7.5	20	22	22.5	28	32	43	50	55	80
Main Reducer	ZD40	ZD60	ZD60	ZD60	ZD70 MBY450	ZD70 MBY500	ZD80 MBY560	JDX560	JDX710	MBY800
Main Motor(kw)	95	250	280	315	400	500	630	710	800	1250
Weight(t)	29	46	54	76	98	107	124	148	162	215

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