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Electric-oxidation extraction of molybdenite concentrate in alkaline NaCl electrolyte

Abstract

The dissolution of molybdenite concentrate in NaCl electrolyte was investigated. The results show that the dissolution rate increases with the increase in liquid-to-solid ratio, stirring speed, NaCl concentration and temperature. When the liquid-to-solid ratio is 30:1, stirring speed is 400 r/min, concentration of NaCl is 4 mol/L at pH=9 and room temperature, the leaching efficiency of molybdenite concentrate will reach 99.5% in 240 min. Molybdenite concentrate cannot be electro-oxidized directly on the anode. The kinetic studies show that the dissolution of molybdenite concentrate is represented by shrinking core model with diffusion through a porous product layer of element sulfur, and the apparent activation energy for the dissolution reaction is 8.56 kJ/mol.

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References

  1. ANTONIJEVIC M M, PACOVIC N V. Investigation of molybdenite oxidation by sodium dichromate [J]. Minerals Engineering, 1992, 5(2): 223–233

    Article  Google Scholar 

  2. FU Jian-gang, ZHONG Hong. A good-prospect hydrometallurgical process for molybdenite [J]. Rare Metals and Cemented Carbides, 2003, 31(4): 22–26. (in Chinese)

    Google Scholar 

  3. VICLOR J. Pressure oxidation process for the production of molybdenum trioxide from molybdnite: USA, 6149883[P]. 2000-11-21.

  4. MANOJ K, MANKHAND T R, MURTHY D S R. Refining of a low-grade molybdenite concentrate [J]. Hydrometallurgy, 2007, 86(3): 56–62.

    Google Scholar 

  5. CAO Zhan-fang, ZHONG Hong, LIU Guang-yi, ZHAO Shu-juan. Techniques of copper recovery from Mexican copper oxide ore [J]. Mining Science and Technology, 2009, 19(1): 45–48.

    Google Scholar 

  6. GERHARDT N I, PALANT A A, PETROVA V A. Solvent extraction of molybdenum, tungsten and vanadium by diisododecylamine from leach liquors [J]. Hydrometallurgy, 2001, 60(3): 1–5.

    Article  Google Scholar 

  7. JUNEJA J M, SOHAN S, BOSE D K. Investigations on the extraction of molybdenum and rhenium values from low-grade molybdenite concentrate [J]. Hydrometallurgy, 1996, 41: 201–209.

    Article  Google Scholar 

  8. FU Jian-gang, ZHONG Hong. Electro-oxidation process for molybdenum concentrates [J]. Journal of Central South University of Technology, 2005, 12(2): 134–140.

    Google Scholar 

  9. ROMANO P. Comparative study on the selective chalcopyrite bioleaching of a molybdenite concentrate with mesophilic and thermophilic bacteria [J]. FZMS Microbiology Letters, 2001, 196(1): 71–75.

    Article  Google Scholar 

  10. CHEN Yun, FENG Qi-ming, SHAO Yan-hai, ZHANG Guo-fan, OU Le-ming, LU Yi-ping. Investigations on the extraction of molybdenum and vanadium from ammonia leaching residue of spent catalyst [J]. Int J Miner Process, 2006, 79: 42–48.

    Article  Google Scholar 

  11. CAO Zhan-fang, ZHONG Hong, QIU Zhao-hui. Solvent extraction of rhenium from molybdenum in alkaline solution [J]. Hydrometallurgy, 2009, 97: 153–157.

    Article  Google Scholar 

  12. QIU Ding-fan. Slurry electrolysis [M]. Beijing: Metallurgical Industry Press, 1999: 133. (in Chinese)

    Google Scholar 

  13. YANG Bao-jun, YU Shao-ming, SHAN Cheng-xiang. Study on kinetics of serpentine leaching in sulfuric acid [J]. Journal of the Chinese Ceramic Society, 1999, 27(1): 65–71. (in Chinese)

    Google Scholar 

  14. SOUZA A D. The leaching kinetics of a zinc sulphide concentrate in acid ferric sulphate [J]. Hydrometallurgy, 2007, 89: 72–81.

    Article  Google Scholar 

  15. SHAO Qing, LAN Yao-zhang. Comprehensive leaching kinetics by sulfuric acid from zinc hydrometallurgy residue [J]. Nonferrous Metal, 2006, 2(3): 11–15. (in Chinese)

    Google Scholar 

  16. JIANG Han-ying. Physical chemistry of hydrometallurgy [M]. Beijing: Metallurgical Industry Press, 1984: 89–116. (in Chinese)

    Google Scholar 

Download references

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Correspondence to Hong Zhong.

Additional information

Foundation item: Project(2007BAB22B01) supported by the 11th Five-Year Plan of National Science and Technology of China; Project(50704036) supported by the National Natural Science Foundation of China

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Cao, Zf., Zhong, H., Liu, Gy. et al. Electric-oxidation extraction of molybdenite concentrate in alkaline NaCl electrolyte. J. Cent. South Univ. Technol. 17, 480–484 (2010). https://doi.org/10.1007/s11771-010-0510-8

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  • DOI: https://doi.org/10.1007/s11771-010-0510-8

Key words

  • wet leaching
  • molybdenite
  • electric-oxidation
  • kinetics
  • dissolution