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某金矿氰化尾矿脱氰试验研究
- 毕廷涛|何力为|赵海亮|赵云霞
- 作者单位：
- 云南省生态环境科学研究院&昆明理工大学环境科学与工程学院|昆明学院&昆明滇池(湖泊)污染防治合作研究中心|云南省生态环境厅驻玉溪市生态环境监测站|云南省生态环境厅驻文山州生态环境监测站
基金项目：
- 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
详细信息：
- 作者简介：
- 毕廷涛（1988—），男，彝族，云南楚雄人，高级工程师，从事环境工程研究工作；昆明市气象路王家坝23号，云南省生态环境科学研究院，650093；E-mail:btt317@qq.com
- 通讯作者：
- E-mail:847595685@qq.com,13508760687
- PDF下载
Experimental research on the decyanidation of cyanide tailings from a gold mine
- English Author：
- 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
- Unit：
- 摘要
- 在线预览
- 参考文献
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1 500 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。
关键词:
氰化尾矿；脱氰；过氧化氢氧化法；碱氯法；固液分离法
Abstract:
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 1 500 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.
Keywords:
cyanide tailings;decyanation;hydrogen peroxide oxidation method;alkali chlorine method;solid-liquid separation method
