SULFIDE CONCENTRATION PROCESS Russian patent published in 2007 - IPC B03B7/00 

FIELD: ore-dressing.

SUBSTANCE: invention relates to a sedimentation/flotation system wherein mineral flow, such as concentrate after pre-flotation or cleaner flotation, is subjected to two-step separation. In the first step, riddle allows creating flow of coarse particles, above 110 μm, and flow of particles lesser than 110 μm. In the second step, small particle flow is subjected to further separation, wherein cyclone produces flow of superfine particles/slimes having p80 value lower than about 25 μm and flow of intermediate-size particles with p80 value higher than about 25 μm. Intermediate-size particle flow is subjected to flotation to recover nickel sulfide, which is sent to final concentration and removal or sedimentation of magnesium oxide, which is subjected to gravitational separation to concentrate MgO. Nickel sulfide and magnesium oxide minerals possess significantly differing densities that can be utilized to employ gravitational separation equipment to achieve separation of magnesium oxide.

EFFECT: enabled efficient separation of magnesium oxide.

16 cl, 2 dwg, 2 tbl