Every coal mill is designed with a particular fuel grinding capacity or throughput at a certain Hardgrove grindability index (HGI), based on a defined raw coal size, moisture content, and desired fineness level. It may also be used to confirm the influence of coal fineness on combustion performance and to evaluate carbon loss.
Coal powder after grinding by coal mill enter in to the rotary kiln with each other with cement raw meal for burning. Coal powder has unique strict demand in fineness. The completed size is 0.0445mm. Coal mill is major equipment of cement plant and used for drying and grinding coal. The equipment is mainly consisted of feed device, main bearings, rotating parts, drive device, selling device, high-voltage start-up device and lubrication system. So coal grinding mill is widely used in cement plant.
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