夏家店金矿含氰尾矿无害化处理实验

针对夏家店金矿含氰尾矿特点，开展了过氧化氢氧化法、过碳酸钠（固体双氧水）氧化法破氰效果实验研究，旨在使破氰尾矿满足 HJ 943-2018《黄金行业氰渣污染控制技术规范》回填利用要求。结果表明，过碳酸钠（固体双氧水）氧化法破氰效果不如过氧化氢，而将含氰尾矿浆pH值调节至9，不添加催化剂CuSO₄的条件下采用2 g/L过氧化氢破氰1 h，尾渣总氰含量可降低至0.9 mg/kg以下，尾渣浸出毒性指标满足规范回填利用要求。 

Study on Harmless Treatment of Cyanide Tailings in Xiadian Gold Mine

According to the characteristics of cyanine tailings in Xiajiadian gold ore, hydrogen peroxide oxidation method and sodium percarbonate (solid hydrogen peroxide solution) oxidation method were carried out to test and study the effect of cyanogen-breaking tailings, aiming to make the cyanogen-breaking tailings meet the backfilling and utilization requirements of HJ 943-2018 《Technical Specification for The Control of Cyanide Residue pollution in the Gold Industry》. The results showed that the cyanide breaking effect of sodium percarbonate (solid hydrogen peroxide) oxidation method was not as good as that of hydrogen peroxide, but the pH value of cyanogen-containing tailings slurry was adjusted to 9, and 2 g/L hydrogen peroxide was used to break the cyanide for 1 h without adding the catalyst CuSO₄. The total cyanide content of tailings could be reduced to less than 0.9 mg/kg, and the leaching toxicity index of tailings could meet the requirements of standard backfill utilization.