Copper nickel bismuth (high ice nickel) flotation

The rich copper- nickel ore or copper-nickel mixed concentrate which is difficult to separate by flotation is firstly smelted in an electric furnace to obtain a low nickel niobium containing about 14% nickel, and then blown by a converter to obtain a Ni content of 45% to 46%. Containing 20% ​​to 30% of high nickel bismuth. High nickel matte belonging artificial copper-nickel sulfide, which is the basic ingredient, nickel sulfide (Ni 3 S 2), copper sulfide (Cu 2 S), and copper-nickel alloys.

The molten and blown copper-nickel crucible is slowly cooled, and after cooling from 800 ° C to 200 ° C, a copper-nickel sulfide having a coarse crystal grain size, stable properties, and good selectivity can be obtained.

Characteristics of copper-nickel bismuth floatation: copper-nickel bismuth is crushed and ground to copper, nickel sulfide monomer dissociation and suitable flotation particle size, and then copper-nickel separation flotation (still nickel-free float copper). Due to the high copper content in copper and nickel bismuth, and the partial nickel-nickel alloy, the density of the material is large, so the concentration of the flotation pulp should be higher than that of the ore flotation, the coarse selection concentration is about 50%, and the sweeping is 30%~ 35%. In order to increase the concentration, sometimes the concentration before the sweeping; the amount of the drug is large, the dosage of Dinghuang is 1~2kg/t, and the amount of sodium hydroxide (also available as lime) is often 1~3kg/t, pH=11～13; Often in the grinding and grading circuit, in the sand returning of the classifier, the copper-nickel alloy is first selected by a magnetic separator.

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