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Metal Mine ›› 2015, Vol. 44 ›› Issue (08): 173-177.

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Gold and Silver Recovering from Cyanide Tailings by Chloridizing Volatilization Method

Li Zhengyao,Deng Wenxiang,Wang Weiwei,Yue Kun   

  1. School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China
  • Online:2015-08-15 Published:2015-11-19

Abstract: There is 5.82 g/t gold,22.95 g/t silver,and 26.23% SiO2 in a oxidize roasted Cyanide Tailings in Shandong Province.For the recycling of gold and silver in the tailings,chlorination volatilization roasting tests were conducted.The results show that the higher of the SiO2 content in tailings and moisture content in charging pellet,gold and silver chloride volatile is the more unfavorable;chloride volatilization rates of gold and silver is 93.21% and 61.61% respectively with calcium chloride dosage of 8%,moisture content in charging pellet is 0.95%,chloridizing roasting temperature is 1 000 ℃,the roasting time is 40 min.Chlorinated volatile method can realize effective recovery of gold and silver from the cyanide tailings.

Key words: Cyanide tailings, SiO2, Gold, Silver, Chloridizing volatilization