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J4 ›› 2011, Vol. 19 ›› Issue (5): 40-44.

• article • Previous Articles     Next Articles

Research on the Mechanism of Pressure Oxidation Leaching Process

ZHANG Wenbo   

  1. Xiamen Zijin Mining and Metallurgy Technology Co.,Ltd.,Xiamen 361101,Fujian,China
  • Received:2011-08-25 Revised:2011-09-16 Online:2011-10-29 Published:2012-05-29

Abstract:

Pressure leaching method,which is an effective method of pretreatment in gold ore or concentrate with sulfur and arsenic,has many advantages:shorten the process,improve leaching rate,not produce the sulfur dioxide. The main reactions of sulfide,iron and arsenic compounds in high temperature oxidation include three approaches:the full oxidation of sulfur to be sulfide or sulfate,divalent iron during the reaction to be ferric,arsenic to be arsenate. As the decreasing resources of easy ore processing,pressure leaching method has been used more and more widely in industrial applications while the research of leaching mechanism is relatively less.We reviewed the chemical reactions of arsenic,sulfur and iron in the pressure leaching process.

Key words: Gold, Arsenic, Sulfur, Iron, Pressure leaching, Hot-pressure oxidation, Chemical reaction

CLC Number: 

  • TD 953

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