某金矿热压氧化后氰化浸金氰化钠消耗实验研究  

Research on the Dosage of Sodium Cyanide Used for Leaching Refractory Gold Ore after Pressure Oxidation Procedure

作　　者：罗星[1] 李尽善 周卫宁[1] 冯吉福[1] 马荣锴[1] 

机构地区：[1]中国有色桂林矿产地质研究院有限公司,广西桂林541004

出　　处：《贵金属》2015年第4期51-55,62,共6页Precious Metals

基　　金：中国有色集团科技计划项目(2014KJJH02);广西科学研究与技术开发计划项目(桂科攻14122006-25)

摘　　要：简要介绍了我国难处理金矿资源现状、难选冶原因、预处理方法,详细分析了该类资源中有害元素热压氧化过程的化学过程。针对某金矿热压氧化渣进行了炭浸氰化实验,考察了p H、调浆时间、底炭浓度、浸出时间对氰化钠消耗量的影响。实验证明,经过热压氧化,能够降低炭浸氰化过程中的氰化钠消耗量及氰化时间。针对实验样,氰化钠消耗量仅为0.27~0.29 kg/t,浸出时间为2~4 h,浸出率为95.34%。The current situation of resource of refractory gold ore in China is briefly described, the reasons for difficulty in leaching and mineral processing, and pretreatment methods. The chemical process of harmful elements in the hot pressure oxidation is also discussed. Cyanide leaching tests of the refractory gold ore after the pressure oxidation were carried out, and the effects of the consumption of sodium cyanide, p H, pulping time, bottom carbon concentration and leaching time were investigated. The results show the pressure oxidation can reduce consumption of sodium cyanide and save the time in carbon leaching process. The leaching percentage of gold increased to 95.34% even when sodium cyanide consumption was 0.27~0.29 kg/t and the leaching time was 2~4 h.

关 键 词：有色金属冶金 难处理金矿 热压氧化 氰化钠 炭浸法 

分 类 号：TF831[冶金工程—有色金属冶金]