某金精矿冶炼厂氰化尾矿浆综合处理试验研究

Experimental research on comprehensive treatment of cyanide tailings pulp in a gold concentrate smeltery

根据某金精矿冶炼厂氰化尾矿浆中氰化物质量浓度较高的特点,开展综合处理试验研究。采用3R-O法、Colt’s法和臭氧氧化法组合工艺回收处理氰化尾矿浆中的氰化物和SCN^-,并对试验条件进行了优化。试验结果表明:氰化尾矿浆中的总氰化合物质量浓度降至2. 86 mg/L,去除率达99. 82%,SCN^-质量浓度降至2. 04 mg/L,去除率达99. 95%,压滤液可回用到氰化浸出工艺;处理后的氰渣达到了HJ 943-2018 《黄金行业氰渣污染控制技术规范》尾矿库处置标准要求,可实现尾矿库堆存。该研究为氰化尾矿浆无害化处理工程化应用提供数据参考。

In light of the high cyanide mass concentration of cyanide tailings pulp in a gold concentrate smeltery,experimental research on the comprehensive treatment is carried out. The joint 3R-O, Colt’s and ozone oxidation process is adopted to recover the cyanide and SCN^-,and the test conditions are optimized. The results show that the mass concentration of total cyanide decreases to 2. 86 mg/L and the removal rate from the cyanide tailings pulp reaches99. 82 %. The mass concentration of SCN^- decreases to 2. 04 mg/L and the removal rate reaches 99. 95 %. The filtrate can be recycled back to cyanidation process;the treated cyanide slag meets the requirement of HJ 943-2018 Technical Specification for Pollution Control of Cyanide Leaching Residue in Gold Industry,realizing stockpiling in tailings pond.The research can provide data reference for the industrial cyanide tailings pulp detoxification application.