某金铜矿2种废水中和回收利用铜试验研究  

Experimental study on neutralization and copper recovery from^(2) types of wastewater in a gold-copper mine

作　　者：王梅君 Wang Meijun(State Key Laboratory of Comprehensive Utilization of Low-grade Refractory Gold Ores;Xiamen Zijin Mining and Metallurgy Technology Co.,Ltd.)

机构地区：[1]低品位难处理黄金资源综合利用国家重点实验室 [2]厦门紫金矿冶技术有限公司

出　　处：《黄金》2024年第11期116-120,共5页Gold

摘　　要：针对某金铜矿含铜含氰废水和含铜酸性废水,开展了HCN挥发性试验、中和条件试验、铜资源回收试验、普鲁士蓝制备试验研究,考察了铁沉淀率、总氰化合物去除率和铜回收情况。结果表明:一段中和除氰除铁控制pH值为4.0,HCN挥发率为0.04%,铁沉淀率大于98%,总氰化合物去除率大于97%;二段过氧化氢破氰后,总氰化合物质量浓度小于5.0 mg/L。废水年处理量按87万m^(3)计算,经济效益高于4000万元。该研究为金精矿生物槽浸工艺除氰提供了思路,可大幅度降低破氰成本,同时为普鲁士蓝染料和电化学能源相关领域的电池前驱体材料制备提供参考。This study targets 2 types of wastewater from a gold-copper mine,namely copper-and cyanide-containing wastewater and acidic copper-containing wastewater.Tests were conducted on HCN volatilization,neutralization conditions,copper resource recovery,and Prussian blue preparation.The study examined the iron precipitation rate,the removal rate of total cyanides,and copper recovery.Results indicated that during the first neutralization stage,controlling the pH at 4.0 resulted in an HCN volatilization rate of 0.04%,an iron precipitation rate exceeding 98%,and a total cyanide removal rate of over 97%.After two-stage cyanide breakdown with hydrogen peroxide,the mass concentration of total cyanides was reduced to below 5.0 mg/L.With an annual wastewater treatment volume of 870000 m^(3),the economic benefits surpass 40 million yuan.This research provides insights into cyanide removal in bio-oxidation tanks for gold concentrate processing,significantly reducing the cost of cyanide breakdown.Additionally,it offers a reference for the preparation of Prussian blue dyes and precursor materials for electrochemical energy-related batteries.

关 键 词：含铜含氰废水 含铜酸性废水 中和 铜回收 普鲁士蓝 综合回收 

分 类 号：TD926.5[矿业工程—选矿]