东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (12): 1742-1745.DOI: 10.12068/j.issn.1005-3026.2014.12.016

• 材料与冶金 • 上一篇    下一篇

MgO对铁矿球团还原冶金性能的影响

高强健， 沈峰满， 郑海燕， 魏国   

  1. (东北大学 材料与冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2013-11-15 修回日期:2013-11-15 出版日期:2014-12-15 发布日期:2014-09-12
  • 通讯作者: 高强健
  • 作者简介:高强健(1987-)，男，辽宁阜新人，东北大学博士研究生； 沈峰满(1958-)，男，黑龙江密山人，东北大学教授，博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51374061，51074040).

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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摘要： 研究考察了MgO对铁矿球团低温还原粉化率(RDI)、还原性(RI)以及还原膨胀率(RSI)等几种冶金性能的影响.结果表明:当MgO添加剂质量分数由0增加至2.0%时，铁矿球团的低温还原粉化率(RDI)和还原膨胀率(RSI)都逐渐下降，分别下降了6.46%与6.21%，还原粉化和还原膨胀现象得到抑制；同时，铁矿球团的还原性(RI)呈现逐渐上升趋势，升高了4.66%；故适量添加MgO有利于改善铁矿球团的冶金性能.通过分析配加MgO添加剂后铁矿球团的微孔情况及矿物组成的变化，研究解明了MgO对铁矿球团冶金性能的影响原因.

关键词: MgO, 铁矿球团, 还原粉化, 还原性, 还原膨胀

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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