Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (2): 241-244.DOI: 10.12068/j.issn.1005-3026.2014.02.020

• Materials & Metallurgy • Previous Articles     Next Articles

Pyrolusite Leaching Reactions in FeS2MnO2H2SO4 System

FENG Yali1, ZHANG Xu1, LI Haoran2, YANG Zhichao1   

  1. 1. Civil and Environmental Engineering School, University of Science and Technology Beijing, Beijing 100083, China; 2. National Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China.
  • Received:2013-05-06 Revised:2013-05-06 Online:2014-02-15 Published:2013-11-22
  • Contact: LI Haoran
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Abstract: The process of pyrolusite leaching in FeS2MnO2H2SO4 system and the effect of FeS2 reaction pattern on leaching efficiency of MnO2 were experimentally studied. The concentrations of Mn2+,Fe2+,Fe3+ and pulp potential were monitored, and the process was divided into some phases and then analyzed. The results show that the leaching rate ratio of Mn2+ to Fe3+ is different in different phases, which shows that different reactions occurred in the pulp in different phases, leading to obvious difference in the utilization ratio of pyrite. The monitoring of pulp potential shows that high potential is favorable to the leaching of pyrite and also speeding up the leaching rate of MnO2.

Key words: pyrolusite, pyrite, leaching efficiency, leaching rate, reaction process

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