Extraction of low-grade silver from a refractory Au-Ag ore in cyanidation by pretreatment with reductive alkaline leaching
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- 作者：Wei Lia ; Zhiqiang Liua ; Qingyuan Huanga ; Yali Tangb ; Xianyang Qiua ; qiuxygz@163.com" class="auth_mail" title="E-mail the corresponding author
- 关键词：Manganese-silver ore ; Cyanidation ; Reductive leaching ; Alkaline leaching
- 刊名：Hydrometallurgy
- 出版年：2016
- 出版时间：September 2016
- 年：2016
- 卷：164
- 期：Complete
- 页码：257-264
- 全文大小：1010 K
文摘
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Occurrence state of the low-grade silver (30.7 ppm) in limonite ore from Beiya (Yunnan, China) is characterized.
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A pretreatment process of reductive leaching by cuprous in the ammonia-ammonium sulfate alkaline solution is reported.
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Metal-Cu was employed to reduce cupric to cuprous in site, based on the Cu2 + content observed in the ore.
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The best leaching ratio of silver was 78.96%.
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This work developed a comprehensive recovery process for the manganese-silver resource with low silver content.