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| 某微细粒砷黄铁矿包裹金矿的非氰浸出研究 |
| Study on Non-cyanide Extraction for a Ore Micro-fine Gold Enclosed by Arsenopyrite |
| 投稿时间：2018-12-13 |
| DOI： |
| 中文关键词: 有色金属冶金 难浸金矿 非氰浸出 边磨边浸 预氧化 |
| 英文关键词: nonferrous metallurgy refractory gold ore non-cyanide leaching leaching-grinding pre-oxidation |
| 基金项目:国家自然科学基金项目(51574146) |
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| 中文摘要: |
| 采用非氰浸化剂(石硫合剂)对含金为2.47 g/t的甘肃某微细粒砷黄铁矿包裹金矿进行浸出试验，研究预处理方式和浸出工艺对金浸出率的影响。结果表明，石硫合剂对金的直接搅拌浸出率低于30%，该矿属难浸金矿石；采用边磨边浸-搅拌浸出的方式，浸出率可提升至68.4%；增加碱式预氧化处理，可将金的浸出率进一步提升到80%以上。采用最优的工艺，边磨边碱式预氧化36 h，经石硫合剂搅拌浸出5 h，金的浸出率可达到91.5%。 |
| 英文摘要: |
| The effect of pre-oxidation and leaching technology on leaching rate of gold was studied by using lime sulfur agent as extraction agent to leach a micro-arsenopyrite coated gold ore with a gold content of 2.47 g/t in Gansu province. The results showed that direct agitation leaching rate of gold was less to 30% by lime sulfur agent. The ore was refractory gold ore. The leaching rate of gold was improved to 68.4% by stirring-grinding-leaching method. The extraction rate of gold was enhanced to over 80% by adding alkaline pre-oxidation treatment. The leaching rate of gold was 91.5% by alkaline pre-oxidation for 36 h and grinding-leaching for 5 h using lime sulfur agent. |
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