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| 预浸-氰化浸出回收湿法炼锌渣中的银和金 |
| Recovery of silver and gold in zinc hydrometallurgy residue by preleaching-cyanide leaching |
| Received:May 11, 2021 |
| DOI： |
| 中文关键词: 有色金属冶金 锌浸出渣 金银回收 预浸 氰化浸出 |
| 英文关键词: nonferrous metal metallurgy zinc leaching residue recovery of gold and silver preleaching cyanide leaching |
| 基金项目: |
| Author Name | Affiliation | E-mail | | ZHANG Ji-wen* | Lingbao Lingjin technology Co. Ltd., Lingbao 472500, Henan, China | 13663983955@139.com | | ZHANG Wei-xiao* | Lingbao Lingjin technology Co. Ltd., Lingbao 472500, Henan, China | | | LÜ Juan-sha* | Lingbao Lingjin technology Co. Ltd., Lingbao 472500, Henan, China | | | DU Cheng-gang* | Lingbao Lingjin technology Co. Ltd., Lingbao 472500, Henan, China | |
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| 中文摘要: |
| 某冶炼厂的锌浸出渣中银勘布粒度细，含银、金分别为381.3、1.02 g/t，可采用预浸-预浸渣氰化浸出工艺回收。重点研究了预浸条件对银、金浸出效率的影响。条件实验表明，药剂A比酸浸、氨浸具有更好的预浸效果；最佳预浸条件为药剂A浓度200 g/L、浸出液固比2:1、在50℃浸出3 h。综合条件实验得到的预浸渣渣率为66.2%，金、银的氰化浸出回收率分别为85.7%、92.9%。 |
| 英文摘要: |
| The zinc leaching residue of a smelter has fine sliver particle size, and the silver and gold contents are 381.3 g/t and 1.02 g/t, respectively. They can be recovered by the preleaching - solution sulfide precipitation - cyanide leaching of pre-leaching residue - zinc powder replacement of leaching solution processes. The effects of pre-leaching conditions on leaching efficiency of silver and gold were studied. The condition experiment shows that agent A has better preleaching efficiency than acid leaching and ammonia leaching. The optimum pre leaching conditions are as follows: 200 g/L of Agent A , leaching liquid-solid ratio of 2:1, leaching at 50℃ for 3 hours. The pre leaching residue rate obtained from the comprehensive condition experiment is 66.2%. The leaching recovery of gold and silver is 85.7% and 92.9%, respectively. |
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