Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (2): 223-227.DOI: 10.12068/j.issn.1005-3026.2015.02.015

• Materials & Metallurgy • Previous Articles     Next Articles

Effect of Ferrosilicon Addition on Direct Reduction of Ilmenite Concentrate and Its Separation Between Iron and Slag

LYU Xue-wei, SONG Bing, HAN Ke-xi, ZHANG Kai   

  1. 1. School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 2. Panzhihua Iron & Steel Research Institute, Panzhihua 600017, China.
  • Received:2013-10-09 Revised:2013-10-09 Online:2015-02-15 Published:2014-11-07
  • Contact: LYU Xue-wei
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Abstract: The influence of Fe-Si additive for the reduction of ilmenite and its separation between iron and slag after smelting were discussed by the carbotherme reduction method. The results show that Fe-Si can improve the reduction rate and metallization. 84.5% of the metallization can be achieved after reduction of 30min at 1380℃. The reduction pellets’ smelting cycle can be shorten, and the separation efficiency of slag with iron and the titanium slag’s grade can be improved if adding Fe-Si. The TiO2 in the titanium slag can be reached 84.75%. The titanium slag liquidus and viscosity were calculated by FactSage software, and the result shows that the viscosity of the titanium slag has no obvious change, but the liquid area of titanium slag can be increased, which is beneficial to the accumulation, growing up and separation of metallic iron. Theoretical calculations well explain the experimental results.

Key words: ferrosilicon, direct reduction, separation between iron and slag, FactSage

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