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微细浸染型金矿强化湿法预处理研究

微细浸染型金矿强化湿法预处理研究

Enhanced Hydrometallurgical Pretreatment of Micro-disseminated Gold Ore

Enhanced Hydrometallurgical Pretreatment of Micro-disseminated Gold Ore

doi:
10.3969/j.issn.1004-0676.2017.04.009
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.
Abstract:
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 [1] 唐云 [1] 唐立靖 [1] 王珏 [1] 王红星 [2]
Author: YANG Dianqi[1] TANG Yun[1] TANG Lijing[1] WANG Jue[1] WANG Hongxin[2]
作者单位
  1. 贵州大学矿业学院,贵阳,550025
  2. 黔西南金龙黄金矿业有限责任公司,贵州黔西南州,552405
期 刊: 贵金属 ISTIC EI SCI PKU CSSCI
Journal: Precious Metals
年,卷(期) 2017, 38(4)
分类号 TD953 TF831
关键词: 有色金属冶金 知识脉络 微细浸染型金矿 知识脉络 充气 知识脉络 两段预处理 知识脉络 非氰浸出 知识脉络
Keywords: nonferrous metallurgy the micro-disseminated gold ore air inflation two-stage pretreatment non-cyanide leaching
机标分类号
基金项目 贵州省科技计划项目,十二五科技支撑计划,贵州大学研究生创新基金
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