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Gold Science and Technology ›› 2014, Vol. 22 ›› Issue (4): 93-98.doi: 10.11872/j.issn.1005-2518.2014.04.093

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Research on the Chloride Ions’ Effect on the Bacteria Pre-oxidation Process of Arsenic-containing Gold Concentrates

YANG Wei1,LIU Ruiqiang2,REN Yunchao3   

  1. 1.College of Materials & Mineral Resources,Xi’an University of Architecture and Technology,Xi’an   710055,Shaanxi,China;
    2.The Refinery of Shandong Gold Mining Co.,Ltd.,Laizhou   261441,Shandong,China;
    3.Engineering Design & Research Co.,Ltd.,Shandong Gold Group,Yantai   264006,Shandong,China
  • Received:2014-06-18 Revised:2014-07-04 Online:2014-08-28 Published:2014-12-24

Abstract:

The paper mainly studies the pre-oxidation process of bacteria of Arsenic-containing gold concentrates under different chloride ion concentrations.The results show that TCJ bacteria can adapt to the changes of water quality in water-head sources to meet the production requirements.On the present producing conditions,the critical value of TCJ bacterial tolerance concentration of chloride ions is 2.7 g/L.The experiment shows that the adaptability and the extent of tolerance of bacteria on Cl is different in different raw materials and leaching system.Appropriate chloride ion is conducive to bacterial oxidation to some extent,while high chloride ions will inhibit bacterial activity and affect the pre-oxidation effect.

Key words: microbial metallurgy, arsenic-containing gold concentrate, pre-oxidation, bacterial adaptation, critical concentration, Thiobacillus ferrooxidans

CLC Number: 

  • TF831

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