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锌冶炼渣中有价金属回收工艺研究

  • 作者:
  • 郭建东|欧海涛|王敏杰|赵军|薛希刚
  • 作者单位:
  • 山东国大黄金股份有限公司|山东国大黄金股份有限公司|山东国大黄金股份有限公司|山东国大黄金股份有限公司|山东国大黄金股份有限公司
  • 基金项目:

  • isnull
  • 详细信息:

  • 作者简介:
  • 郭建东(1977—),男,高级工程师,从事金银治炼、硫酸生产、金银选矿工艺技术研究应用与生产过程管理工作;E-mail:guojiandong08@126.com
  • 通讯作者:
  • isnull
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Study on recovery process of valuable metals in zinc smelting slag

  • English Author:
  • Shandong Guoda Gold Co.,Ltd.|Shandong Guoda Gold Co.,Ltd.|Shandong Guoda Gold Co.,Ltd.|Shandong Guoda Gold Co.,Ltd.|Shandong Guoda Gold Co.,Ltd.
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  • 摘要
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  • 参考文献

摘要:

回收利用锌冶炼渣中有价金属,对冶金行业可持续发展具有重要意义。某锌冶炼渣中锌、铅、金、银含量较高,试验采用酸浸—碱浸—氰化浸出湿法梯级浸出工艺回收锌、铅、金、银。试验结果表明:在硫酸质量分数20 %,液固比2∶1,浸出温度80 ℃,浸出时间2 h的条件下,锌浸出率为90.31 %;在氢氧化钠质量分数10 %,液固比2∶1,浸出温度80 ℃,浸出时间2 h的条件下,铅浸出率为93.37 %;在氰化钠质量分数0.20 %,液固比2∶1,浸出时间16 h的条件下,金、银浸出率分别为82.61 %、92.39 %。该湿法梯级浸出工艺实现了锌冶炼渣的综合回收。

关键词:

锌冶炼渣;湿法梯级浸出工艺;酸浸;碱浸;氰化浸出

Abstract:

The recovery and utilization of valuable metals in zinc smelting slag are of great significance to the sustainable development of the metallurgical industry.In this study,a wet step leaching process,including acid leaching-alkaline leaching-cyanidation leaching,was used to recover zinc,lead,gold and silver with high contents of the above metals.The experimental results showed that under the conditions of sulfuric acid mass fraction of 20 %,liquid-solid ratio of 2∶1,leaching temperature of 80 ℃,and leaching time of 2 h,the zinc leach-ing rate was 90.31 %;under the conditions of sodium hydroxide mass fraction of 10 %,liquid-solid ratio of 2∶1,leach-ing temperature of 80 ℃,and leach-ing time of 2 h,the lead leaching rate was 93.37 %;under the conditions of sodium cyanide mass fraction of 0.20 %,liquid-solid ratio of 2∶1,and leaching time of 16 h,the gold and silver leaching rates were 82.61 % and 92.39 %,respectively.The wet step leaching process realized the comprehensive recovery of the zinc smelting slag.

Keywords:

zinc smelting slag;wet step leaching process;acid leaching;alkaline leaching;cyanidation leaching