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对含有次生铜矿物的秘鲁劳拉复杂铜 -铅 -锌矿石进行了试验 ,以研究提高铜铅混合精矿铜铅分离指标的可能性。正像处理铜 -铅 -锌矿石的秘鲁选矿厂一样 ,劳拉选矿厂原来用单一重铬酸盐法 ,由于矿石中存在次生铜矿物 ,该法效果不好。由于选矿厂位于海拔高 (4 3 0 0m)的地区 ,其它铜铅分离方法 (如SO2 -淀粉法和加热法 )应用受到了限制。本研究中提出了一种新的铜铅分离方法 ,该法用于选矿厂后 ,选矿指标得到大幅度改善。该法用羧甲基纤维素 (CMC)和磷酸盐 (Na2 HPO4 )与重铬酸盐的络合物作为铅矿物的新型抑制剂。除了选矿指标大幅度提高外 ,选矿厂尾矿溢流中六价铬离子含量降至选矿厂原来的 1/10。本文简单地叙述了新抑制剂的实验室试验和选矿厂工业试验结果
The Peruvian Lara complex copper-lead-zinc ore containing secondary copper minerals was tested to investigate the possibility of improving the copper-lead separation index of the copper-lead mixed concentrate. Like the Peru concentrator that deals with copper-lead-zinc ores, the single mineral dichromate was used at Laura concentrator, which is ineffective because of the presence of secondary copper minerals in the ore. As the concentrator is located at an elevation of 4300m, other copper-lead separation methods such as SO2-starch method and heating method are limited. In this study, a new copper-lead separation method was proposed. After the method was applied to the concentrator, the beneficiation index was greatly improved. This method uses carboxymethyl cellulose (CMC) and phosphate (Na2 HPO4) complexes with dichromate as novel lead minerals inhibitors. In addition to a substantial increase in beneficiation indicators, beneficiation plant tailings overflow hexavalent chromium ion content dropped to 10% of the original concentrator. This article briefly describes the laboratory tests of new inhibitors and the results of industrial tests at the concentrator