Application examples of new technology for separation of copper and lead from sulfide ore
In order to eliminate pollution, improve process indicators, and gradually develop a method. The first with steam mixed Cu-Pb concentrate was warmed to about 60 ℃, in acidic and neutral pulp, brass can be improved floating mine, galena is suppressed. There is no need to add other chemicals during the sorting process. The obtained copper concentrate has high grade and low Pb and Zn. It can reduce environmental pollution because it does not need to be added with chemicals. The mechanism of heating and sorting is considered to selectively desorb the surface of galena. The collector and make its surface oxygen hydrophilic.
In addition to the warming separation without dosing, there is also a warm separation of the inhibitor. When such a mixture of copper and lead concentrates mineral separation plant, steam heating of pulp, added Na 2 CrO 4 as inhibitor. The control conditions are: temperature 60 ° C, pH = 7.5 ~ 8. Na 2 CrO 4 1.5 kg/t.
Dai concentrator within Japan Kosaka complex of zinc sulfide ores of copper and lead, which separation of copper and lead concentrate by mixing warming method. The production process is shown in Figure 1. The copper-lead mixed concentrate is steamed in a stirred tank for 10 min, the temperature is 60-70 ° C, and its pH is controlled by sulfuric acid and lime = 5 to 5.5. The copper concentrate obtained by adding no agent during copper flotation contains Cu 28.80%. Lead concentrate contains 52.68% Pb. Copper concentrates are of higher quality and lead concentrates are of lower quality because this process causes zinc in the mixed concentrate to enter the lead concentrate.
Figure 1 Copper and lead separation process of antimony ore in Japan
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