journal6 ›› 2010, Vol. 31 ›› Issue (2): 97-100.

• Information and Engineering • Previous Articles     Next Articles

Research on Leaching  Process of  Copper,Zinc and Cadmium from Copper-Cadmium Slag


  1. (College of Chemistry and Chemical Engineer,Jishou University,Jishou 416000,Hunan China)
  • Online:2010-03-25 Published:2012-04-18

Abstract: Aimig at the low leaching rate of the traditional ammonium leaching process,the oxidizing ammonium leaching process of extracting cadmium,zinc,and copper from copper-cadmium slag is adopted.The effect of copper-cadmium slag was studied by orthogonal tests in laboratory in order to find out the optimum ammonia leaching conditions with oxidants.The optimum conditions obtained are as follows:ammonia concentration 3.7 mol/L,ammonium ion concentration 5.0 mol/L,(NH4)2S2O8 concentration 30 g/L,and liquid to solid ratio 6∶1.Under the optimum conditions,the leaching rate of Cd and Cu can reach 99%,and at the same time the leaching rate of Zn and Cd can reach 96%.The leaching rate of the oxidizing ammonium leaching process is obviously higher than that of the traditional ammonium leaching process.

Key words: copper-cadmium slag, oxidizing ammonium leaching, cadmium, zinc, copper

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