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氰化贫液脱除锌铜与循环浸出利用试验研究
- 作者：
- 王建政|孔令强|王敏杰|欧海涛
- 作者单位：
- 山东国大黄金股份有限公司|山东国大黄金股份有限公司|山东国大黄金股份有限公司|山东国大黄金股份有限公司
基金项目：
- isnull
详细信息：
- 作者简介：
- 王建政（1977—），男，山东招远人，高级工程师，从事金银冶炼工艺技术研究应用与生产过程管理工作；山东省烟台市招远市国大路668号，山东国大黄金股份有限公司，265406；E-mail：wjz@sdguoda.com
- 通讯作者：
- isnull
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Experimental research on zinc and copper removal from cyanide barren solution and its recycled leaching utilization
- English Author：
- Shandong Guoda Gold Co.,Ltd.|Shandong Guoda Gold Co.,Ltd.|Shandong Guoda Gold Co.,Ltd.|Shandong Guoda Gold Co.,Ltd.
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
某白银生产企业氰化浸银系统产出的氰化贫液长期循环利用，由于铜、锌等杂质金属离子不断积累，导致银浸出率降低，生产指标波动。采用三级工艺（一级酸化脱锌、二级酸化脱铜、三级石灰中和）进行处理，并对试验条件等进行优化。在最佳条件下，氰化贫液中锌、铜的平均脱除率分别约为94.06 %、98.90 %；脱铜后液经石灰粉中和至pH值为7.0~7.5，碳酸钠调整pH值至10.0~10.5的三级处理液返回银精矿氰化浸出流程，获得了较好效果，氰化渣银品位平均下降了53.00 g/t，解决了氰化贫液循环浸出和综合回收利用的难题，具有较好的经济效益和环境效益。
关键词:
氰化贫液；酸化；脱铜;脱锌；石灰中和;循环浸出
Abstract:
Due to accumulating impurities such as metal ions of copper and zinc in the long-term recycled cyanide barren solution generated from cyanide silver leaching systems in a silver production enterprise,the silver leaching rate decrease and the production index fluctuates.So,the test uses three-stage process(zinc removal by acidification for the first stage,copper removal by acidification for the second stage,lime neutralization for the third stage) for the treatment and optimizes the test conditions.Under optimal conditions,the average zinc and copper removal rates from cyanide barren solution are about 94.06 % and 98.90 % respectively;the solution with copper removed is neutralized with lime to pH 7.0-7.5 and the third-stage treatment solution adjusted by sodium carbonate to pH 10.0-10.5 is recycled to the silver concentrates cyanidation leaching flowsheet,achieving good effect:silver grade in cyanide residue decreases by 53.00 g/t on average.The process solves the challenge of cyanide barren solution recycling and comprehensive recovery and can achieve good economic and environmental benefits.
Keywords:
cyanide barren solution;acidification;copper removal;zinc removal;lime neutralization;recycled leaching
