coal grinding mill, coal pulverizer machine, coal powder
Coal is mainly composed of carbon, hydrogen, oxygen, nitrogen, sulfur and phosphorus and other elements, it is very important energy, but also metallurgy, an important raw material in the chemical industry, coal is mainly used in power generation, steel, cement, fertilizer, system of oil fields. It can be divided into lignite coal, bituminous coal, anthracite, semianthracite and other types.