摘要
针对某黄金生产企业氰化尾矿的特点,充分利用现有设备进行氰化尾矿无害化处理,以氰化尾矿毒性浸出指标达到一般工业固体废物标准为主要研究目的,采用因科法对该企业的氰化尾矿进行综合治理,并对试验条件进行了优化。结果表明,焦亚硫酸钠投加量为2.5 g/L,五水硫酸铜投加量为0.05 g/L,反应时间为3 h,气液比为5∶1,氰化尾矿温度为40℃条件下,处理后的氰化尾矿液相中总氰化合物质量浓度低于23.4 mg/L时,氰化尾矿(含水率约20%)毒性浸出液中总氰化合物质量浓度低于0.5 mg/L,且处理后的氰化尾矿回水对企业选矿指标无影响。
According to the cyanide tailings characteristics of a gold production enterprise,the existing equipment is made full use of to detoxify cyanide tailings,with the goal that the toxicity index after leaching reach the common industrial solid waste standard.Inco method is employed for comprehensive treatment of cyanide tailings and the experiment conditions are optimized.The results showed that the optimum treatment parameters were as follows:the dosage of sodium pyrosulfite was 2.5 g/L,the dosage of copper sulfate pentahydrate was 0.05 g/L,the reaction time was 3 h,the gas-liquid ratio was 5∶1,the cyanide tailings temperature was 40℃;under these conditions,the total cyanide mass concentration in the cyanide tailings liquid phase was less than 23.4 mg/L,and the total cyanide mass concentration in the toxic leachate of cyanide tailings(about 20%moisture content)is less than 0.5 mg/L and the return water from cyanide tailings treatment has no side effect on mineral processing indexes.
作者
兰馨辉
张化武
武胜魁
叶锦娟
高飞翔
任辉
初一
Lan Xinhui;Zhang Huawu;Wu Shengkui;Ye Jinjuan;Gao Feixiang;Ren Hui;Chu Yi(Changchun Gold Research Institute Co.,Ltd.;Sunite Jinxi Gold Mining Co.,Ltd.)
出处
《黄金》
CAS
2018年第4期68-70,74,共4页
Gold
关键词
因科法
氰化尾矿
无害化处理
总氰化合物质量浓度
焦亚硫酸钠
Inco method
cyanide tailings
detoxification
total cyanide mass concentration
sodium pyrosulfite
作者简介
兰馨辉(1987—),男,山西阳泉人,工程师,主要从事矿山环境保护研究工作;长春市南湖大路6760号,长春黄金研究院有限公司环境保护研究所,130012;E-mail:xinhui98765@163.com
