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某高砷金精矿预处理后焙砂硫代硫酸盐浸出研究
- 作者：
- 潘志刚|谢锋|郑钟伟|陈俊南|王伟
- 作者单位：
- 安徽超威电源有限公司|东北大学冶金学院|东北大学冶金学院|东北大学冶金学院|东北大学冶金学院
基金项目：
- 中央高校基本科研业务费项目(N182502044)
详细信息：
- 作者简介：
- 潘志刚（1978—），男，高级工程师，从事废铅膏短流程绿色回收工作；E-mail：845823695@qq.com
- 通讯作者：
- 谢锋(1970—)，男，教授，博士，研究方向为重贵金属冶金；E-mail：xief@smm.neu.edu.cn
- PDF下载
Study on thiosulfate leaching of the roasting slag after the pretreatment of the gold concentrates with high arsenic content
- English Author：
- Anhui Chaowei Power Source Co.,Ltd.|School of Metallurgy,Northeastern University|School of Metallurgy,Northeastern University|School of Metallurgy,Northeastern University|School of Metallurgy,Northeastern University
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
硫代硫酸盐法浸金具有反应速率快，毒性低，适于处理含铜、砷、碳质等难处理金矿石等优点，被认为是最有希望取代氰化提金的非氰浸金技术之一。国内某黄金企业高砷难处理金精矿经过两段焙烧预处理获得的焙砂中含金104 g/t、砷0.74 %、硫0.87 %，通过单因素条件试验，确定了铜-氨-硫代硫酸盐法提取该焙砂中金的最佳浸出条件：Cu2＋浓度0.10 mol/L、NH3·H2O浓度2.0 mol/L、Na2S2O3浓度0.10 mol/L、溶液pH值11、温度50 ℃、浸出时间7 h。在此条件下，金浸出率可达75.1 %，表明该焙砂应用硫代硫酸盐工艺浸金仍有待进一步优化和强化。
关键词:
硫代硫酸盐；难处理金矿；高砷；焙烧；非氰
Abstract:
Thiosulfate leaching of gold has many advantages,such as a fast leaching rate,low toxicity,is applicable to dealing with refractory gold ores containing copper,arsenic,and carbon,and is considered the most promising non-cyanide leaching technology to replace cyanide gold extraction.In this paper,the slag obtained from a two-stage roasting pretreatment of the refractory gold concentrates with high arsenic content in a domestic gold enterprise contains 104 g/t Au,0.74 % As,and 0.87 % S.The completely randomized design decided the adoption of the copper-ammonia-thiosulfate method to extract gold from the slag.The optimal leaching conditions for thiosulfate leaching are as follows:0.10 mol/L Cu2＋,2.0 mol/L NH3·H2O,0.10 mol/L Na2S2O3,solution pH of 11,temperature of 50 ℃ and leaching time of 7 h.Under these conditions,the maximum gold leaching rate is 75.1 %,indicating that the application of the thiosulfate leaching process to this slag still needs to be further optimized and strengthened.
Keywords:
thiosulfate;refractory gold ore;high arsenic content;roasting;non-cyanide
