俄罗斯克孜尔—喀什特克铜铅锌多金属矿选矿厂的铜铅混合精矿以重铬酸盐为铅矿物抑制剂浮选分离铜、铅,铜、铅精矿质量指标均不理想.为解决现场分离指标不理想,且重铬酸盐对环境危害较大的问题,以氢氧化钠为铅矿物抑制剂进行了铜铅分离试验,并据此进行了现场工艺优化与生产实践.结果表明:①以氢氧化钠为铅矿物抑制剂,采用1粗2精2扫流程抑铅浮铜,获得了铜品位为22.41％、含金11.75 g/t、含银667.10 g/t、含铅3.67％、铜回收率为85.23％、金回收率为96.68％、银回收率为46.13％的铜精矿,铅品位为50.14％、含银656.97 g/t、含金0.34 g/t、含铜3.28％、铅回收率为94.18％、银回收率为53.87％的铅精矿.②工艺优化后的现场铜精矿铜品位和铜回收率分别达21.85％和83.61％,较改造前分别提高了4.04、9.23个百分点;铅精矿铅品位和铅回收率分别达52.44％和94.27％,较改造前分别提高了2.31、6.71个百分点.③现场改造不仅使精矿指标显著改善,而且药剂品种及用量大大降低,吨原矿药剂费用由改造前的9.39元降至7.16元,每吨矿石药剂费用降低2.23元,每年可节省药剂成本约300万元,经济和社会效益显著.%To treat mixed copper and lead concentrate from Kizil-Kashiturk copper-lead-zinc polymetallic concentrator in Russia,dichromate are usually adopted as inhibitor of lead minerals to realize the separation of copper and lead. But copper and lead concentrate quality indicators are not ideal. In order to solve the issues that the separation index is not ideal and dichro-mate greatly harms to the environment,the process of copper and lead separation with sodium hydroxide as lead mineral inhibi-tors are tested,and applied into the on-site process optimization and production practice. The results showed:① with sodium hydroxide as inhibitor,copper concentrate with Cu grade of 22. 41％,Au grade of 11. 75 g/t,Ag grade of 667. 10 g/t,Pb grade of 3. 67％,Cu recovery of 85. 23％,Au recovery of 96. 68％,Ag recovery of 46. 13％,and lead concentrate with Pb grade of 50. 14％,Ag grade of 656. 97 g/t,Au grade of 0. 34 g/t,Cu grade of 3. 28％,Pb recovery of 94. 18％,Ag recovery of 53. 87％were obtained separately through the process of one roughing,two cleaning and two scavenging.② After process optimization, copper grade and recovery in the field reached 21. 85％ and 83. 61％ increasing by 4. 04 and 9. 23 percentage points respec-tively compared with original process. Lead grade and recovery of lead concentrate reached 52. 44％ and 94. 27％,increasing by 2. 31 and 6. 71 percentage points respectively.③The process optimization in the field significantly improved the separation performances and largely lowered the numbers and dosages of flotation reagents. Reagent cost per ton raw ore was reduced from RMB 9. 39 yuan to 7. 16 yuan,decreasing by 2. 23 yuan,and thus about RMB 3 million yuan of reagent cost yearly could be saved with remarkable economic and social benefits gained.
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