Molybdenum
Molybdenum reserves on the earth are relatively small, accounting for only 0.001% of the weight of the earth's crust. The total molybdenum reserves are about 15 million tons, mainly distributed in the United States, China, Chile, Russia, Canada and other countries. The proven molybdenum reserves in China are 1.72 million tons and the basic reserves are 3.43 million tons, ranking second only to the United States in the world. Molybdenum deposits are concentrated in Shaanxi, Henan, Jilin and Liaoning provinces. There are six super large molybdenum mines with metal reserves of more than 500000 tons in the world. China's three major molybdenum mines are Luanchuan in Henan, Daheishan in Jilin and JINDUICHENG in Shanxi.
Rich molybdenum resources provide favorable conditions and solid foundation for the development of molybdenum smelting and processing and the promotion of Molybdenum Application in China.
Molybdenum, like tungsten, is a refractory rare metal. The melting point of molybdenum is 2620 ℃. Due to the strong bonding force between atoms, the strength of molybdenum is very high at room temperature and high temperature. It has small expansion coefficient, high conductivity and good thermal conductivity. It does not react with hydrochloric acid, hydrofluoric acid and alkali solution at room temperature, but only dissolves in nitric acid, aqua regia or concentrated sulfuric acid. It is also quite stable for most liquid metal, nonmetal slag and molten glass.
Therefore, molybdenum and its alloys have a wide range of applications and good prospects in metallurgy, agriculture, electricity, chemical industry, environmental protection, aerospace and other important departments, and become an important raw material and irreplaceable strategic material in the national economy.
