次氯酸钠-碘化物浸金的实验研究

Experimental Study on Gold Leaching with Sodium Hypochlorite-iodide

针对辽宁五龙金矿四道沟分矿的金矿石，研究了影响OCl^- -I^-浸金体系的主要因素。得出了OCl^- -I^-体系浸出的最佳条件是：次氯酸钠的用量占矿浆体积的7％-9％，碘化钾浓度不小于0．25mol／L，pH值为偏酸性至中性，浸出时间为4h，在此条件下金浸出率可达85％以上。

For the gold-bearing ores of sidaogou submine of Wulong Gold Mine in liaoning province, major factors affecting gold leaching system with OCl^- -I^- were investigated. Optimum conditions obtained for OCl^- -I^- leaching system were that the dosage of sodium hypochlorite accounted for 7% -9% of pulp volume, the concentration of potassium io- dide was not less than 0.25 tool/L, the pH value was acidic to neutral and leaching time was 4 h. Under these conditions the leaching rate of gold was above 85%.