某金矿氰化尾矿脱氰试验研究  

Experimental research on the decyanidation of cyanide tailings from a gold mine

作　　者：毕廷涛 何力为 赵海亮 赵云霞 Bi Tingtao;He Liwei;Zhao Hailiang;Zhao Yunxia(Yunnan Research Academy of Eco-environmental Sciences;Faculty of Environmental Science and Engineering of Kunming University of Science and Technology;Kunming University;Kunming Dianchi(Lake)Environmental Protection Collaborative Research Center;Ecological Environment Monitoring Station of Department of Ecology and Environment of Yunnan Province in Yuxi City;Ecological Environment Monitoring Station of Department of Ecology and Environment of Yunnan Province in Wenshan Prefecture)

机构地区：[1]云南省生态环境科学研究院 [2]昆明理工大学环境科学与工程学院 [3]昆明学院 [4]昆明滇池(湖泊)污染防治合作研究中心 [5]云南省生态环境厅驻玉溪市生态环境监测站 [6]云南省生态环境厅驻文山州生态环境监测站

出　　处：《黄金》2022年第10期82-85,共4页Gold

基　　金：云南省重点研发计划项目(2018BC004);云南省污染土壤修复关键技术研究与应用示范项目。

摘　　要：对某金矿氰化尾矿分别采用碱氯法、过氧化氢氧化法、固液分离法进行脱氰试验研究,3种方法处理后尾渣毒性浸出液中总氰化合物质量浓度均低于5 mg/L,但固液分离法总氰化合物去除率相对较高,且无需使用药剂,采用其进行工业规模验证试验。试验结果表明:该工艺运行稳定,处理后尾渣平均含水率为18.56%,总氰化合物质量分数低于1500 mg/kg,毒性浸出液中总氰化合物质量浓度稳定低于5 mg/L,可降低氰化尾矿再利用处置环境风险,拓宽处置途径。The decyanation of cyanide tailings from a gold mine was studied through the alkali chlorine method,the hydrogen peroxide oxidation method,and the solid-liquid separation method.After the cyanide tailings are treated by these 3 methods,the mass concentration of the total cyanide compound in the toxic leaching solution is<5 mg/L.In comparison,the solid-liquid separation method had a higher removal rate of total cyanide compounds and did not require the use of chemicals.The method was subsequently used in industrial-scale validation tests.The results showed that the solid-liquid separation process was stable,the average water content of the treated tailings was 18.56%,and the mass fraction of total cyanide compounds was less than 1500 mg/kg,the mass concentration of total cyanide compounds in the toxic leaching solution is steadily<5 mg/L,which can lower the environmental risks to reuse cyanide tailings and extend disposal pathways.

关 键 词：氰化尾矿 脱氰 过氧化氢氧化法 碱氯法 固液分离法 

分 类 号：TD926.4[矿业工程—选矿]