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Gold Science and Technology ›› 2013, Vol. 21 ›› Issue (2): 82-85.

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Roasting-acid Leaching-cyanidation of Refractory Gold Concentrate Containing Copper

ZHONG Shuiping   

  1. Zijin Mining Group Co.,Ltd.,Shanghang   364200, Fujian,China
  • Received:2012-11-27 Revised:2013-01-07 Online:2013-04-28 Published:2013-09-17

Abstract:

Focusing on refractory gold concentrate containing copper,the technology of roasting-acid leaching-cyanidation was studied and the optimized condition was obtained.Experimentation results show that Cu leaching rate is above 95% and copper grade of acid-leach residue is low of 0.3% when concentrate roasted 2 hours at temperature of 540 ℃,roasted product is leached with sulfuric acid of 30 g/L under conditions of 3 of liquid-solid ratio,90 ℃ of temperature and time of 1.5 hours.The recovery rate of Au is above 96% when decoppering slag is leached with the densities of sodium cyanide of 4‰ under conditions of 30% of pulp density and time of 24 hours.This process realizes recovery Au and Cu in high efficiency.

Key words: Gold concentrate containing copper, Roasting, Acid leaching, Pretreatment, Cyanidation

CLC Number: 

  • TF831

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