International Journal of Earth Sciences and Engineering

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The grade of nickel and copper in Cu-Ni ore, which is the primary sulfide ore in Huangshan deposit in Hami, Xinjiang, is 0.39% and 0.26%, respectively. The dominating metal minerals in it are pyrrhotite, chalcopyrite, pentlandite, magnetite, while gangue minerals are steatite, serpentine, and carbonate. Without depriving steatite prior to mixed-selecting copper and nickel to transfer some suspensible steatite and serpentine into rough concentrate, a series of problems will occur, i.e. the productivity of middling will be high, the efficiency of concentration will be low, the amount of beneficiation reagent will be large, badly exacerbating flotation environment. During metal concentrates some suspensible steatite and serpentine can't be easily suppressed, causing the amount of magnesia high in nickel after separation. To reduce the influence of steatite and serpentine on selecting process, these minerals must be selected out first by good floatability.

Keywords

Cu-Ni Sulfide Deposit, Magnesia, Low Grade, Ore Dressing Experiment, Xinjiang.
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