NOUFERROUS METALLURGICAL EQUIPMENT

Molybdenum is an important strategic rare metal, widely used in steel, chemical, aerospace and other fields. Molybdenite is the most important raw material for molybdenum smelting, and its oxidation roasting process has always been the mainstream process in China and other countries. The molybdenum oxide obtained by roasting is mainly used as an additive in the steel industry and is also the main raw material for the production of ferromolybdenum and ammonium molybdate chemical products. With the increasing consumption of high-quality molybdenite resources, the proportion of low-grade complex molybdenite is getting larger and larger, and the traditional process is facing many problems such as difficult flue gas treatment and low comprehensive recovery rate. Therefore, this paper summarizes the research on molybdenite smelting processes carried out in recent years, such as the addition of additives for roasting, chlorination process, direct reduction process and vacuum thermal decomposition process, nitric acid atmospheric oxidation method, sodium hypochlorite decomposition method, acid-base medium oxygen pressure decomposition method and electro-oxidation decomposition method, analyzes and compares the characteristics of each process, and looks forward to the main development directions of molybdenum metallurgy in the future.