氰化贫液再利用提高银浸出率试验研究  

The experiment on reusing the cyanide barren solution for improving the leaching rate of silver

作　　者：邱建森 

机构地区：[1]紫金铜业有限公司,福建上杭364204

出　　处：《世界有色金属》2017年第11期11-13,共3页World Nonferrous Metals

摘　　要：本文在氰化贫液水质分析的基础上,研究了氰化贫液三种处理方式对生产系统的影响,结果表明氰化贫液直接循环使用于氰化浸出系统对金银浸出对金银浸出不利,必须定期开路部分氰化贫液;采用硫酸亚铁化学络合法处理氰化贫液存在氰化物处理深度不够,需进行二次处理;而氰化贫液采用硫酸亚铁化学络合法消除大部分氰化物的情况下,所得处理后液用于金精矿调浆时,残余氰化物通过高温(焙烧温度达650℃)分解,降低了氰化贫液处理环保风险,还充分利用所含有的大量硫酸钠、碳酸钠等钠盐成分,在原生产工艺加入氢氧化钠作为焙烧预处理剂的基础上,可再提高银浸出率约6%,而对金、铜浸出效果影响很小。The paper is research on cyanide barren solution of three kinds of treatment effect on the production system, it is on the basis of water quality analysis. The results showed that cyanide barren solution should be opened on a regular basis part of cyanide barren solution, It was because that cyanide barren solution is directly recycling used in cyanide leaching system against the leaching of gold and silver .and the ferrous sulfate chemical complexation of cyanide treatment depth is not enough, it is difficult to achieve the emission standard, combined with the actual production, Using ferrous sulfate chemical complex legal handling cyanide barren solution existence cyanide treatment depth is not enough, need to secondary processing. And cyanide barren solution by ferrous sulfate chemical ways to eliminate most of the cyanide case, after the treatment fluid return charging mixing process of gold concentrate then were pasted into roasting furnace, Through the furnace temperature , which can been reached 650qC ,the cyanide was decomposed into harmless substances, It can achieve the closed cycle of cyanide barren solution integrated management , At the same time, with the effective ingredient of the filtrate, such as Sodium sulfate, sodium carbonate optimized the effection of the gold concentrate It can improve the leaching rate of silver about 6% which Compared to the original production process to join sodium hydroxide as roasting pretreatment agents, And little impact on gold, copper leaching.

关 键 词：氰化贫液 再利用 金 银 铜 

分 类 号：TD953[矿业工程—选矿]