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Metal Mine ›› 2015, Vol. 44 ›› Issue (10): 173-177.

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Recovering Gold and Iron from Cyanide Tailing by One-step Process of Chloridizing Volatilization and Reduction Roasting

Li Zhengyao,Wang Weiwei,Yue Kun   

  1. School of Civil and Environmental Engineering,University of Science and Technology Beijing,Beijing 100083,China
  • Online:2015-10-15 Published:2015-11-20

Abstract: Chlorinated volatile-reduction roasting experiment was conducted in order to find the feasibility of one-step recovery gold and iron from cyanide tailing,using cyanide tailing(assaying 4.57 g/t gold,and 42.95% iron) from a gold smelting enterprises in Henan Province as research object,calcium chloride and sodium chloride as chlorination agents  (w(CaCl2)∶w(NaCl) = 4∶1 mixture),bituminous coal as reductant.Results show that on the dosage of chlorination agent is 10%,dosage of bituminous coal is 10%,calcination temperature is 1 000 ℃,the roasting time is 80 min,grinding fineness of calcined products is 75% -0.043 mm,magnetic field intensity is 106 kA/m,gold volatilize rate of 85.19%,iron concentrate with iron grade and recovery of 74.16% and 87.75% is obtained.Test results provide a new way for the recovery of gold and iron from cyanide tailing.

Key words: Cyanide tailing, Chloridizing volatilization-reduction roasting, Gold, Iron