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Gold Science and Technology ›› 2013, Vol. 21 ›› Issue (2): 86-89.

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Experimental Study on the Process of Adoption Roasting Cyanidation Ex-traction of Gold，Silver and Copper in the Copper Concentrate

XUE Guang1，YU Yongjiang2   

  1. 1.No.7 Gold Geological Party of the CAPF，Yantai   264004，Shandong，China；
    2.Yantai Jinhui Mining and Metallurgy Technology Co.，Ltd.，Yantai   264001，Shandong，China
  • Received:2012-12-20 Revised:2013-02-04 Online:2013-04-28 Published:2013-09-17

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Abstract:

This paper has studied the process methods of adoption roasting cyanidation extraction of gold，silver and copper in a flotation copper concentrate.The results show that roasting flotation gold concentrate （0.074 mm more than 90 %）under the 600 °C，and the by-product SO2 is used in preparation of acid.The calcine was leach-ed with 5% H2SO4，and recovering copper.Tuning solution pH≈9.5 with the new modifier（NH4HCO3+NaOH）， and leaching the acid Leaching residue with the cyanidation.The extraction ratio for gold，silver and copper reached 98.18%，32.17% and 93.6%，respectively.It has an obvious economic benefits and social effectiveness，and provides an effective technique method for copper concentrate extraction process.

Key words: Roasting cynidation, Copper concentrate, Gold, Silver and Copper

CLC Number: 

  • TF831

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