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Journal of Central South University of Technology

, Volume 11, Issue 4, pp 405–409 | Cite as

Electrogenerative leaching of nickel sulfide concentrate with ferric chloride

  • Wang Shao-fen Email author
  • Fang Zheng 
  • Wang Yun-yan 
  • Chen Yang-guo 
Article

Abstract

In order to utilize the chemical energy in hydrometallurgical process of sulfide minerals reasonably and to simplify the purifying process, the electrogenerative process was applied and a dual cell system was introduced to investigate FeCl3 leaching of nickel sulfide concentrate. Some factors influencing the electrogenerative leaching, such as electrode structure, temperature and solution concentration were studied. The results show that a certain quantity of electrical energy accompanied with the leached products can be acquired in the electrogenerative leaching process. The output current and power increase with the addition of acetylene black to the electrode. Varying the components of electrode just affects the polarization degree of anode. Increasing FeCl3 concentration results in a sharp increase in the output of the leaching cell when c(FeCl3) is less than 0.1 mol/L. The optimum value of NaCl concentration for electrogenerative leaching nickel sulfide concentrate with FeCl3 is 3.0 mol/L. Temperature influences electrogenerative leaching by affecting anodic and cathodic polarization simultaneously. The apparent activation energy is determined to be 34. 63 kJ/mol in the range of 298 K to 322 K. The leaching rate of Ni2+ is 29.3% after FeCl3 electrogenerative leaching of nickel sulfide concentrate for 620 min with a filter bag electrode.

Key words

nickel sulfide concentrate FeCl3 electrogenerative leaching 

CLC number

F111.3 TG146.1+

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Copyright information

© Central South University 2004

Authors and Affiliations

  • Wang Shao-fen 
    • 1
    • 2
    Email author
  • Fang Zheng 
    • 2
  • Wang Yun-yan 
    • 3
  • Chen Yang-guo 
    • 2
  1. 1.School of Chemistry and Environmental EngineeringChangsha University of Science and TechnologyChangshaChina
  2. 2.School of Chemistry and Chemical EngineeringCentral South UniversityChangshaChina
  3. 3.School of Metallurgical Science and EngineeringCentral South UniversityChangshaChina

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