Usage: An important raw material in the production of magnesium carbonate,magnesium sulphate,magnesium oxide ,magnesium hydroxide and other magnesium compounds in chemical industry. Used as the adhesive of fireproof materials and it is also raw materials fo the production of No.2 melting agent and metal magnesium.The important raw material in the production of light building materials such as ,fiber glass tile ,ommental plate, sanitary, ware ceiling,floor brick ,magnesium cement and other materials that used in building .The solidifying agent for protein in food industry and used as fireproof agent for coal mine in coal industry. It is also used as freeze proof agent and dirty proof agent..