摘要
采用两段充气预处理-非氰化工艺浸出微细浸染型金矿,研究了浸出条件对金浸出效率的影响。结果表明,在氧化和碱浸预处理2个阶段充气可提高金浸出率;氧化预处理2 h后,加入氢氧化钠(20 kg/t)碱浸预处理4 h,加入氧化钙(40 kg/t)替代氢氧化钠,用TY-3浸出剂(8 kg/t)浸出4 h,金浸出率可达87.21%。浸出渣的物相分析、扫描电镜观察及X射线能谱分析结果显示,硅酸盐、碳酸盐中的金可被有效浸出,浸出渣中的石英、黄铁矿表面发生腐蚀,部分黄铁矿氧化。
The effects of leaching conditions on gold recovery from a micro-disseminated gold ore were studied by following a non-cyanide leaching procedure with two-stage impregnation during inflation. The results showed the gold leaching rate can be increased by air inflation in 2 stages of oxidation and alkali pretreatment. After oxidation pretreatment for 2 hours, sodium hydroxide （20 kg/t） was added for ensuing alkali leaching pretreatment for 4 hours, and then the calcium oxide （40 kg/t） was added to replace the sodium hydroxide. Finally the TY-3 leaching agent （8 kg/t） was used to leach for 4 hours. An overall gold leaching rate of up to 87.21% was achieved. Phase analysis, SEM and X-ray energy spectrum of the resulting residues showed that the gold in silicate and carbonate could be effectively leached out. The quartz and pyrite surface in leaching residues had been corroded, and also part of pyrite was oxidized.
作者
杨典奇
唐云
唐立靖
王珏
王红星
YANG Dianqi;TANG Yun;TANG Lijing;WANG Jue;WANG Hongxin(Mining College, Guizhou University, Guiyang 550025, China;Qianxinan JinLong Gold Mining Limited Liability Company, Qianxinan 562405, Guizhong, China)
出处
《贵金属》
CAS
CSCD
北大核心
2017年第4期44-48,55,共6页
Precious Metals
基金
贵州省科技计划项目(黔科合基础[2017]1404)
十二五科技支撑计划(No.2012BAB08B06)
贵州大学研究生创新基金(研理工2016080)
关键词
有色金属冶金
微细浸染型金矿
充气
两段预处理
非氰浸出
nonferrous metallurgy
the micro-disseminated gold ore
air inflation
two-stage pretreatment
non-cyanide leaching
