| 摘要 |
<p>In a method for separating copper sulphides from lead sulphides contained in particulate copper lead sulphide concentrates by a flotation process, an aqueous alkali metal silicate-alkali metal dichromate reagent solution is added in the flotation step to depress the lead bearing sulphides together with a collector for collecting the copper sulphides. The copper lead sulphide concentrate may be obtained from a complex copper-lead-zinc ore, in which case the majority of the zinc is first removed by conventional flotation techniques and the copper lead sulphide concentrate treated with activated carbon prior to addition of the silicate-dichromate reagent solution. <IMAGE></p> |
