4.4 Article

Cleaner recovery of multiple valuable metals from cyanide tailings via chlorination roasting

期刊

SEPARATION SCIENCE AND TECHNOLOGY
卷 56, 期 12, 页码 2113-2123

出版社

TAYLOR & FRANCIS INC
DOI: 10.1080/01496395.2020.1812650

关键词

Cyanide tailings; valuable metals; simultaneous recycling; thermodynamics research

资金

  1. National Natural Science Foundation of China [51604135]
  2. Liupanshui Key Laboratory of Metallurgical Energy Saving, Environmental Protection and Recycling Economy [52020-2018-0304]
  3. Science and Technology Innovation Group of Liupanshui Normol University [LPSSYKJTD201801]
  4. Key cultivation disciplines of Liupanshui Normol University [LPSSYZDPYXK201708]

向作者/读者索取更多资源

In this study, a process for the clean recovery of multiple valuable metals from cyanide tailings was proposed using chlorination roasting, achieving high recovery rates. Experiments identified optimal conditions, such as chlorinated agent dosage and roasting temperature, for maximum recovery of valuable metals.
Recovery of valuable metals is hindered by sulfur in cyanide tailings. In this work, a process for the clean recovery of multiple valuable metals through chlorination roasting was proposed. HSC software was used to find that the process of dissociation of chlorides is further accelerated by sulfur in the tailings. Experiments were carried out to study temperature variables and chlorinated agent variables. The optimum conditions were identified to be a CaCl(2)dosage of 4%, roasting temperature of 1323 K, achieved maximum recovery of 84% of Au, 71% of Ag, 72% of Cu, 92% of Pb, and 69% of Zn.

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