Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (1): 47-51.DOI: 10.12068/j.issn.1005-3026.2015.01.011

• Materials & Metallurgy • Previous Articles     Next Articles

Experimental Study on Separation of Iron from Low m(Cr)/m(Fe) Chromite

ZHAO Qing1, 2, ZHANG Bo1, LIU Cheng-jun1, JIANG Mao-fa1   

  1. 1. Key Laboratory for Ecological Metallurgy of Multimetallic Ores,Ministry of Education, Northeastern University, Shenyang 110819, China; 2.Thermal and Flow Engineering Laboratory, bo Akademi University, Turku 20500, Finland.
  • Received:2013-11-27 Revised:2013-11-27 Online:2015-01-15 Published:2014-11-07
  • Contact: ZHAO Qing
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Abstract: Based on thermodynamic analysis, some experiments on separation of iron from low m(Cr)/m(Fe) South Africa chromite by carbothermic reduction were conducted. It was found that the separation result of iron from chromite was notably influenced by reduction temperature, and the experimental optimum reduction temperature was 1100℃. Below 1100℃, the reduction precipitation and matrix interacted by embedding.Above 1100℃, the reduction degree of chromium rose sharply, leading the recovery yield of chromium get worse. Metallurgical-grade chromite was obtained from chemical-grade chromite by 0.5h reduction at 1100℃ and an acid leaching treatment. Furthermore, the m(Cr)/ m(Fe) was elevated from 1.7 to 5.8 with only a minor loss of chromium after 2h reduction at 1100℃. The study on the separation of iron from low m(Cr)/m(Fe) chromite may provide a new idea for comprehensive utilization of chromite.

Key words: chromite, m(Cr)/ m(Fe), separation of iron, carbothermic reduction, spinel

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