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| 微细浸染型金矿强化湿法预处理研究 |
| Enhanced Hydrometallurgical Pretreatment of Micro-disseminated Gold Ore |
| 投稿时间：2016-09-20 |
| DOI： |
| 中文关键词: 有色金属冶金 微细浸染型金矿 充气 两段预处理 非氰浸出 |
| 英文关键词: nonferrous metallurgy the micro-disseminated gold ore air inflation two-stage pretreatment non-cyanide leaching |
| 基金项目: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)。 |
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| 中文摘要: |
| 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。 |
| 英文摘要: |
| 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. |
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