Abstract: In view of the problems in conventional flotation process for the preparation of 57% molybdenum in Jinduicheng Molybdenum Group, studies on new technology and its design and the industrial tests of machine-column joint flotation are carried out.Through process optimization with joint of machine-column flotation, the advantages of high separation efficiency and high recovery by machine-column joint can be fully played, and all molybdenum concentrate grading at Mo≥57% is produced with no low-grade by-product concentrate and more than 98% of recovery rate.

Key words: Molybdenum concentration, Machine-column joint flotation, 57% of molybdenum concentrate