Sawdust is also known as wood chips, which is the foam shaped objects fall down from the wood during the wood processing process.
Ball mill is also called grinding ball mill, which is widely used for grinding raw materials or finished products in mining, cement, refractory, building materials, ore dressing, chemical industry,
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.