含氰废水酸化工艺优化与应用  

Optimization and application of acidification process for cyanide-containing wastewater

作　　者：姜凯文 李寿江 王兆平 杨新华 秦广林 Jiang Kaiwen;Li Shoujiang;Wang Zhaoping;Yang Xinhua;Qin Guanglin(Shandong Gold Smelting Co.,Ltd.;Smelting Laboratory Branch of Shandong Gold Group Mining Technology Co.,Ltd.)

机构地区：[1]山东黄金冶炼有限公司 [2]山东黄金矿业科技有限公司选冶实验室分公司

出　　处：《黄金》2023年第9期123-127,共5页Gold

摘　　要：某黄金冶炼公司氰化提金过程中产生的含氰废水采用酸化工艺处理,回收其中的铜和氰化物后,返回氰化水系利用。通过对酸化工艺pH条件进行优化,铜回收率提高至98.81%,同时提高了硫氰根离子脱除率;通过研发氯化钙快速沉淀技术,降低了返回氰化水系中的硫酸根离子质量浓度。优化后酸化工艺应用后,氰化水系中硫酸根离子质量浓度降低了49.35%,硫氰根离子质量浓度降低了16.86%,明显改善了氰化浸出工艺的生产条件,尤其是硫酸根离子质量浓度降低至23.5 g/L,缓解了硫酸钠结晶对冬季生产的影响。In the cyanide extraction process of a gold smelting company,the cyanide-containing wastewater is treated through an acidification process to recover copper and cyanide,which are then returned to the cyanide water system for reuse.By optimizing the pH conditions of the acidification process,the copper recovery rate is increased to 98.81%,while improving the removal rate of thiocyanate ions.Through the development of rapid precipitation technology using calcium chloride,the mass concentration of sulfate ions in the returned cyanide water system is reduced.After application of the optimized acidification process,the mass concentration of sulfate ions in the cyanide water system is reduced by 49.35%,and the mass concentration of thiocyanate ions is reduced by 16.86%.This significantly improves the production conditions of the cyanide leaching process,particularly reducing the sulfate ion mass concentration to 23.5 g/L,alleviating the impact of sodium sulfate crystallization on winter production.

关 键 词：含氰废水 氰化水系 酸化 氯化钙 硫酸根离子 硫氰根离子 

分 类 号：TD926.5[矿业工程—选矿]