Abstract
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 NameAffiliationE-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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