氢氧化钠替代重铬酸盐浮选分离俄罗斯某铜铅混合精矿

发布时间：2018-07-08 17:19

本文选题：铜铅混合精矿 + 抑铅浮铜　；参考：《金属矿山》2017年12期

【摘要】：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。
[Abstract]:The mixed concentrate of copper and lead in Kizil Kashitke copper-lead-zinc polymetallic ore concentrator used dichromate as the depressant of lead mineral to separate copper, lead, copper and lead concentrate by flotation. In order to solve the problem that the field separation index is not ideal and the dichromate is harmful to the environment, the copper and lead separation experiments with sodium hydroxide as a lead mineral inhibitor are carried out, and the field process optimization and production practice are carried out. The results showed that: (1) with sodium hydroxide as lead mineral inhibitor, copper concentrate with copper grade of 22.41%, silver content of 11.75 g / t, silver content of 667.10 g / t, lead content of 3.67%, copper recovery rate of 85.23%, gold recovery rate of 96.68% and silver recovery rate of 46.13% were obtained by using the process of 1 coarse 2 fine 2 sweep. Lead grade is 50.14%, silver is 656.97 g / t, gold is 0.34 g / t, copper is 3.28, lead recovery is 94.18%, silver recovery is 53.87%. The lead grade and lead recovery rate of lead concentrate are 52.44% and 94.27% respectively, which are 2.31% and 6.71% higher than those before revamping. (3) the field modification not only improves the concentrate index, but also reduces the variety and dosage of chemicals. The cost of raw ore reagents per ton is reduced from 9.39 yuan to 7.16 yuan, and the cost of ore reagents is reduced by 2.23 yuan per ton, which can save about 3 million yuan per year. The economic and social benefits are remarkable.
【作者单位】：北京科技大学土木与环境工程学院;低品位难处理黄金资源综合利用国家重点实验室;厦门紫金矿冶技术有限公司;
【分类号】：TD923;TD952

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