Abstract: Process mineralogy of a refractory molybdenum ore is studied. The results show that the constituent of metallic minerals in the ore are relatively simple，and the gangue minerals are various in kind; Molybdenum ore is the only recoverable value element.  Molybdenum disulfide occupies 90.26% of the total molybdenum，mainly in the form of molybdenite. Molybdenite mainly occurs in the fractures with features of incomplete development of molybdenite particles，smaller particle size，the uneven distribution，difficulty in liberation and concentration. Molybdenum recovery by stage grinding and separation process can not only reduce the consumption of grinding and reagents，but also improve the separation indexes.

Key words: Molybdenite, Process mineralogy, Occurrence