亚硫酸氢钠-空气法处理氰化尾渣试验研究  

Test Research on Cyanidation Tailings Treatment by NaHSO_(3)-Air Method

作　　者：豆娜 赵福财 李玉玺 王苹 DOU Na;ZHAO Fu-cai;LI Yu-xi;WANG Ping

机构地区：[1]山东招金科技有限公司,山东烟台265400

出　　处：《有色冶金节能》2021年第4期20-24,共5页Energy Saving of Nonferrous Metallurgy

摘　　要：针对氰化尾渣除氰后滤渣毒性浸出液的总氰化合物浓度较高,无法满足技术规范要求的问题,采用亚硫酸氢钠-空气法处理氰化尾渣。本文通过试验,研究亚硫酸氢钠-空气法的最佳反应条件。结果表明,NaHSO3除氰最佳反应条件为NaHSO3用量6.00 kg/t,初始pH值为9.5,五水硫酸铜用量300 mg/L,不曝气,反应时间2 h,反应温度19℃。在最佳反应条件下闭路循环13次后,滤渣毒性浸出液总氰化合物浓度小于5 mg/L,满足规范中氰渣尾矿库处置标准。The leachate of the residue from filtration of cyanidation tailings contains high concentration of total cyanide and can’t meet the requirement of relevant technical specification.Therefore,the NaHSO3-air method is proposed for treating cyanidation tailings.In this paper,the optimal reaction conditions of the NaHSO3-air method were studied based on test.The study showed that the best cyanide removal effect occurs under such conditions as NaHSO3 dosage 6.00 kg/t,initial pH value 9.5,CuSO4·5 H2O dosage 300 mg/L,no aeration,reaction lasting 2 h and reaction temperature at 19℃.After 13 times of closed-circuit circulation under the optimal reaction conditions,the total cyanide in the toxic leachate was less than 5 mg/L,meeting the cyanidation tailings treatment standard of TSF in the technical specification.

关 键 词：全泥氰化-炭浆吸附 NaHSO_(3)-空气法 氰化尾渣 毒性浸出液 总氰化合物 危险废物 黄金 

分 类 号：TF831[冶金工程—有色金属冶金] X758[环境科学与工程—环境工程]