Coal Mill

Overview
Coal mill is a kind of ball mill, which is often used to crush and grind coal bricks into powder, so it is also called coal grinding mill. Coal mill is the main equipment in cement plant, which is used for drying and grinding of coal. It has wide applications such as coal mill in power plant, metallurgical, building materials and chemical industry also has wide application, which is o suitable for making coal and mineral material powder. Coal mill has reasonable structure and high grinding efficiency, which is the ideal equipment for coal preparation.
In coal-fired power plants coal mills are used to pulverize and dry to coal before it is blown into the power plant furnace. The coal is feed into the coal mill through a central inlet pipe where gravity is used to lead the coal to the bottom of the mill, where the grinding table and some heavy rollers pulverizes the coal to particles.

Principle
Coal mill is mainly composed of feeding device, main bearing, rotating part, transmission device, discharging device, high pressure starting device and lubrication system. Raw material enters into the mill by feeding device, then hot air enters into the mill from the through the air inlet pipe. With the rotation of cylinder, heat exchange will occur between the coal and hot air in the mill. When the coal is being ground, fine powder will be discharged out of the mill through the feeding device by the hot air.

Feature
1. High grinding efficiency.
Coal mill has combination design of the grinding liner, which adopts different lining board structure according to different stages of the coal mill, so the grinding efficiency has been greatly improved.
2. On-demand design, flexible configuration.
According to different types, coal mill can adopts edge transmission or center transmission, which has flexible configuration.
3. The yield is 12~38t/h and fineness can reach 80 μm.
The output of Dewo coal mill is 12~38t/h, and the fineness can reach 80 μmR to achieve high yield and high fineness, which provides high efficiency and energy saving coal grinding equipment for the production of high quality coal.