Molybdenum, like tungsten, is a refractory rare metal. Since 1778, the Swedish scientist C.W.SCHEELE discovered molybdenum, after more than ten years of hard work, M.MOISSAN used an electric furnace to produce metal molybdenum, making it the first time for humans to obtain this metal with many excellent physical, chemical and mechanical properties. Molybdenum has a melting point of 2620 ° C., and its strength is very high at room temperature and high temperature due to its extremely strong interatomic bonding force. It has small expansion coefficient, large electrical conductivity and good thermal conductivity. At room temperature, it does not react with hydrochloric acid, hydrofluoric acid and alkali solution, only soluble in nitric acid, aqua regia or concentrated sulfuric acid, and is quite stable for most liquid metals, non-metallic slag and molten glass. Therefore, molybdenum and its alloys in metallurgy, agriculture, electrical, chemical, environmental protection and aerospace and other important sectors have a wide range of applications and good prospects, become an important raw material in the national economy and irreplaceable strategic material. The reserves of molybdenum on the earth are small, and its content accounts for only 0.001 of the weight of the earth's crust. The total reserves of molybdenum ore are about 15 million tons, mainly distributed in the United States, China, Chile, Russia, Canada and other countries. China has proven molybdenum metal reserves of 1.72 million tons, basic reserves of 3.43 million tons, second only to the United States and second 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 in Luanchuan, Henan, Daheishan, Jilin and Jinduicheng, Shaanxi are on the list. The abundant molybdenum resources provide extremely favorable conditions and solid foundation for the development of molybdenum smelting and processing in China and the promotion of molybdenum application. In recent years, China's molybdenum mining, smelting and processing has been rapid development. According to data, in 2001, China actually produced 72000 tons of molybdenum concentrate, 33000 tons of molybdenum oxide, 7600 tons of ferromolybdenum, 9500 tons of various ammonium molybdate, 1183 tons of molybdenum strip, 1200 tons of molybdenum slab, 150 tons of molybdenum plate, more than 40 tons of molybdenum disc, about 50 tons of molybdenum plug and other special-shaped products, 3.15 billion meters of electric light source industry and mechanically processed molybdenum wire, and hundreds of tons of chemical products such as lubricants, catalysts and pigments. Not only that, my country occupies a pivotal position in the world molybdenum market. According to customs statistics, in 2001, my country exported as much as 70274 tons of molybdenum calcine, molybdate, ferromolybdenum and other molybdenum products, earning US $0.262 billion. The consumption form of molybdenum is mainly industrial molybdenum trioxide, accounting for about 70%, ferromolybdenum accounting for about 20%, metal molybdenum and molybdenum chemicals each accounting for 5%. Its application areas and distribution proportions are roughly as follows: steel smelting consumption accounts for about 80% (including about 43% for alloy steel, about 23% for stainless steel, about 8% for tool steel and high-speed steel, about 6% for cast iron and rolls), chemical products account for about 10%, metal molybdenum products account for about 6%, high-temperature high-strength alloys and special alloys account for about 3%, and other molybdenum products account for about 1%. It can be seen that the development of the iron and steel industry plays a decisive role in the consumption of molybdenum, but with the development of science and technology, the application of molybdenum in high-tech and other fields will continue to expand and develop.