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氰化堆浸循环液中杂质离子去除试验研究

Experimental study on impurity ions removal from the cyanide heap leaching circulating solution
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摘要 长山壕金矿氰化堆浸贫液随着循环次数的增加,杂质离子铜、铁、镍等质量浓度逐渐增加,与氰离子形成难解离的络合物,直接影响氰化提金效率和提金流程。试验采用负载Na3TMT复合絮凝剂的重金属选择性树脂吸附-洗脱方法,在不干扰金回收的前提下,达到了降低堆浸循环液中杂质离子的目的。该重金属选择性树脂对堆浸循环液中铜、镍、铁的去除率均可达到90%以上,且铜和镍达到工业污水排放标准;洗脱液中富集的铜质量浓度约3 000 mg/L,具有一定的回收经济价值。 The mass concentration of impurity ions such as copper,iron and nickel increases with the circulation times of cyanide heap leaching barren solutions in Changshanhao Gold Mine,leading to the complexation with cyanogen ions difficult to disassociate and directly affecting the cyanide gold extraction efficiency and flowsheet. The experiment chose the adsorption-elution method using the Na3 TMT composite flocculant-loaded resin selective for heavy metals and achieved the goal of reducing impurity ions in the heap leaching circulating solution without interfering with gold extraction. The heavy metals selective resin can remove more than 90 % of the copper,nickel and iron from the heap leaching circulating solution,and the copper and nickel content meets the industrial wastewater emission standards;the mass concentration of copper enriched in the eluted solution is about 3 000 mg/L,making the copper worth recovering.
作者 孙中建 孟庆秋 黄易周 Sun Zhongjian;Meng Qingqiu;Huang Yizhou(Inner Mongolia Taiping Mining Co. ,Ltd.)
出处 《黄金》 CAS 2019年第10期68-71,共4页 Gold
关键词 氰化堆浸 循环液 重金属 三巯基均三嗪 树脂 吸附 洗脱 cyanide heap leaching circulating solution heavy metal triterpene s-triazine resin adsorption elution
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