Research Status on the Effect of Oxidation on Flotation of Copper-Sulfide Minerals
The surfaces of most copper-sulfide minerals are easily oxidized,which have a significant effect on the flotation of the minerals and the adsorption of reagents on the surface of minerals.At present,researchers have conducted extensive re-search on the effect of oxidation on the flotation of copper-sulfide minerals,and have obtained remarkable achievements.Based on the factors affecting the surface oxidation of copper-sulfide minerals,this paper focuses on analyzing factors such as solution properties,mineral lattice defects on the surface oxidation of copper-sulfide minerals.The difficulty of the flotation of copper-sulfide minerals after oxidized increased and the reasons are analyzed.On one hand,the metal ions increased generated from the oxidation and dissolution,which will cause serious interaction effect of copper-sulfide minerals,thus making it difficult to realize the flotation separation of copper-sulfide minerals.One the other hand,the strong hydrophilic metal oxides and hydrox-ides generated from the surface oxidation of copper-sulfide minerals will seriously weaken the effective adsorption of collectors,resulting in a decrease in the floatability of copper-sulfide minerals.Based on this,the flotation strengthening measurements and mechanism of copper-sulfide minerals after oxidized are discussed from two aspects:the shedding method of the oxidation layer and the surface regulation method of copper-sulfide minerals after oxidized.At last,the relevant suggestions were proposed a-bout the flotation strengthening measurements of oxidized copper-sulfide minerals.This could provide reference for achieving the effective flotation recovery of oxidized copper-sulfide minerals.
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