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Ningxia Carbon Coal is the dominant mineral resource in Ningxia. The distribution area of coal-bearing strata in this area is 17,000 square kilometers, accounting for a quarter of the total area of Ningxia. coal has been hailed as black gold, industrial food. Elements that form the coal's organic matter are mainly carbon, hydrogen, oxygen, nitrogen and sulfur, in addition, there is a very small amount of phosphorus, fluorine, chlorine and arsenic and other elements.