Zoucheng Hao Ze Trading Company is a large coal sales company, which sells coal, coal, coal washing, Southwest is the largest in the center of a coal sales, coal, referred to coal, is ancient plant remains, buried in the formation, through the crust isolated from the air under pressure and temperature conditions role carbonation fossil generated primarily by human exploitation as fuel. For modern industrial coal, whether it is heavy industry, light industry or; whether it is the energy industry, metallurgy industry, chemical industry, machinery industry, or the textile industry, food industry, transportation, have played an important role in a variety of industries departments are to some extent, to consume a certain amount of coal, coal is therefore called "real food" industry. Is one of the main energy sources since the eighteenth century, the use of the human world. Although now an important position has been replaced by coal oil, but in the future for a long period of time, due to the gradual depletion of oil is bound to decline, but because of the huge coal reserves, combined with the rapid development of science and technology, new technologies such as coal vaporization matures, and has been widely used in coal production will become human life can not be replaced energy sources. Depending on the raw material and conditions as coal, natural coal can be divided into three categories, namely humic coal, coal and residual plant SAPROPELIC. .