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›› 2001, Vol. 1 ›› Issue (1): 0-0.

• 1 •    

硫杆菌浸出低品位镍铜硫化矿

陈泉军，方兆珩   

  1. 中国科学院化工冶金研究所，北京 100080
  • 出版日期:2001-02-20 发布日期:2001-02-20

Kinetics of Leaching RE from Panxi Mn-containing Mud with Hydrochloric Acid

TIAN Jun1, 2, CHI Ru-an1, ZHU Guo-cai1, XU Sheng-ming1   

  1. 1. Institute of Nuclear Energy Technology, Tuinghua University, Beijing 102201, China;2. Institute of Applied Chemistry, Jiangxi Academy of Sciences, Nanchang, Jiangxi 330029, China
  • Online:2001-02-20 Published:2001-02-20

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摘要： 阐述了氧化亚铁硫杆菌(TF5)和氧化硫硫杆菌(TT)在摇瓶中浸出金川低品位含钴、镍、铜硫化矿的工艺条件实验. 结果表明，浸出过程的pH值应控制在2.0左右；细菌的接种量应控制在3.0?109个/ml左右；低矿浆浓度有利于浸出的进行；氧化亚铁硫杆菌和氧化硫硫杆菌混合浸出，以2:1的比例混合比1:1的比例浸出率要高.

关键词: 氧化亚铁硫杆菌, 氧化硫硫杆菌, 硫杆菌浸出, 低品位镍铜硫化矿

Abstract: The kinetics of leaching RE from Panxi Mn-containing mud with hydrochloric acid was investigated. The effects of reaction temperature, particle size and HCl concentration on the leaching rate were determined. The apparent activation energy is 9.59 kJ/mol as calculated from the experimental data. The results show that the leaching process can be described by the shrinking core model as HCl concentration is below 2.0 mol/L and the leaching rate is controlled by diffusion of reacting reagents and leached products in the porous solid layer. When HCl concentration is above 2.0 mol/L, the leaching mechanism changes from inner diffusion control to mixed control mechanism because the original ore structure is destroyed.

Key words: leaching kinetics, rare earth, Mn-containing mud

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