用于铜铅浮选分离的新型组合抑制剂研究

Study on Combination Depressants for Flotation Separation of a Copper-lead Bulk Concentrate

针对铜铅硫化矿可浮性相近和精矿铜铅互含选矿难题,研究新型组合抑制剂(LY和硫代硫酸钠)在不同浮选条件下对黄铜矿和方铅矿的抑制作用,并与传统抑制剂重铬酸钾、羧甲基纤维素、亚硫酸钠等进行了对比。试验结果表明,在矿浆自然pH至弱碱性条件下,新型组合抑制剂(LY和硫代硫酸钠)对方铅矿具有良好的抑制作用,而对黄铜矿抑制作用较弱。人工混合矿物浮选试验取得良好的分离效果。在选矿厂铜铅混合精矿闭路验证试验中,获得的铜精矿含Cu 28.05%、含Pb 6.88%、Cu回收率84.16%、Pb回收率3.79%,铅精矿含Pb 65.54%、含Cu 1.98%,Pb回收率96.21%,Cu回收率15.84%,表明该药剂制度是合理的。

There are the separation problems of chalcopyrite and galena with similar floatability in bulk concentrate. we studied the inhibition and separation of chalcopyrite and galena by new combination depressant (LY and sodium thiosulfate) under different flotation conditions, and compared them with traditional depressants such as potassium dichromate, carboxymethyl cellulose and sodium sulfite. The results showed that the new combined depressant (LY and sodium thiosulfate) has a good inhibition effect on galena and a weak inhibition effect on chalcopyrite under the condition from natural pH of slurry to weak alkalinity. The artificial mixed ore achieved good separation results. In the closed-circuit verification test of Cu-Pb bulk concentrate, the copper concentrate contain Cu 28.05% with recovery is 84.16%, contain Pb 6.88% with recovery is 3.79%, the lead concentrate contain Pb 65.54% with recovery is 96.21%, contain Cu 1.98% with recovery is 15.84%.