METHOD OF FLOTATION OF PENTLANDITE FROM PYRROHOTINE-CONTAINING PRODUCTS Russian patent published in 2005 - IPC

FIELD: mineral dressing.

SUBSTANCE: the invention is pertaining to the mineral dressing, in particular, to the methods of flotation of pentlandite and associate with it minerals of non-ferrous metals and precious metals from pyrrohotine-containing raw materials and may be used at a flotation dressing of sulfide copper-nickel ores and middlings. The invention allows to separate selectively pentlandite into the nickel and pyrrohotine concentrates at simultaneous increase of its separation and reduction of irretrievable losses of valuable components together with the common tailings at much lower consumption of the collector. The method provides for a collective nickel- pyrrohotine floatation at presence of an organic sulfur-containing additive and collectors: dithiocarbamate, xanthogenate and dithiophosphate, the subsequent selective separation of pentlandite and pyrrohotine into the target concentrates at presence of dithiocarbamate and the collector. As the collector in the cycle of the pyrrohotine flotation use a mixture containing a polyglycol-alkyl ether, dialkyldithiophosphate and 1-(ethylthio)octane at its mass ratio with xanthogenate ions equal to 1: (0.23 ÷ 0. 45). In the cycle of a control nickel-pyrrohotine flotation they use a mixture containing polyglycol alkyl ether, dialkyldithiophosphate and 1 -( ethylthio)octane at its optimum ratio with ions of xanthogenate equal to 1 : (0.8 ÷ 2.1).

EFFECT: the invention ensures selective separation of pentlandite into the nickel and pyrrohotine concentrates, its increased separation, reduction of irretrievable losses of valuable components at much lower consumption of the collector.

2 cl, 4 ex, 1 tbl