Journal of Northeastern University Natural Science ›› 2014, Vol. 35 ›› Issue (12): 1742-1745.DOI: 10.12068/j.issn.1005-3026.2014.12.016

• Materials & Metallurgy • Previous Articles     Next Articles

Investigation on Effect of MgO on Reduction Metallurgical Properties of Iron Ore Pellet

GAO Qiang-jian, SHEN Feng-man, ZHENG Hai-yan, WEI Guo   

  1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2013-11-15 Revised:2013-11-15 Online:2014-12-15 Published:2014-09-12
  • Contact: GAO Qiang-jian
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Abstract: The effect of MgO on reduction metallurgical properties of pellets were investigated, such as low-temperature reduction degradation index(RDI), reduction index(RI)and reduction swelling index(RSI). The results show that, with the addition of MgO-bearing additive from 0 to 2.0% in pelletizing, the RDI and RSI decrease gradually, and the value of RDI and RSI decrease by 6.46% and 6.21% respectively, which means that the reduction degradation phenomenon and reduction swelling phenomenon are inhibited. The RI of pellets increased by 4.66% with the addition of MgO bearing additive from 0 to 2.0% in pellets, and therefore the addition of MgO is favorable to improve the reduction metallurgical properties of pellets. Based on the pore space analysis and mineral composition analysis of different MgO-bearing pellets, the reasons for the variation of metallurgical properties of pellets were clarified.

Key words: MgO, iron ore pellet, reduction degradation, reduction index, reduction swelling

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