东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2016, Vol. 37 ›› Issue (10): 1407-1410.DOI: 10.12068/j.issn.1005-3026.2016.10.009

• 材料与冶金 • 上一篇    下一篇

MgO对铁矿球团矿还原后强度的影响

高强健， 魏国， 姜鑫， 沈峰满   

  1. (东北大学 冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2015-06-30 修回日期:2015-06-30 出版日期:2016-10-15 发布日期:2016-10-14
  • 通讯作者: 高强健
  • 作者简介:高强健(1987-)，男，辽宁阜新人，东北大学师资博士后研究人员； 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(51604069); 国家自然科学基金-辽宁联合基金资助项目(U1508213)；中国博士后科学基金资助项目(2016M591445).

Effect of MgO on Compressive Strength of Reduced Iron Ore Pellet

GAO Qiang-jian， WEI Guo， JIANG Xin， SHEN Feng-man   

  1. School of Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2015-06-30 Revised:2015-06-30 Online:2016-10-15 Published:2016-10-14
  • Contact: GAO Qiang-jian
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摘要： 在实验室条件下，研究了MgO对铁矿球团还原后强度的影响.结果表明:当MgO质熔剂质量分数由0增加至2.0%时，铁矿球团矿还原后强度得到提升；经还原后，铁矿球团矿的孔径和孔隙度都相应增大，但相比普通球团矿(MgO质熔剂质量分数为0)，含MgO球团矿(MgO质熔剂质量分数为2.0%)还原前、后孔径及孔隙度变化幅度相对较小，孔径分布相对集中；还原膨胀是决定铁矿球团矿还原后强度的主要因素；还原膨胀率越低，铁矿球团还原后的强度相对越大.

关键词: MgO, 铁矿球团, 还原强度, 还原膨胀, 孔隙度

Abstract: The effect of MgO on compressive strength of the reduced iron ore pellets was investigated in a lab condition. The experimental results showed that with increasing the mass fraction of MgO-bearing flux from 0 to 2.0%， the compressive strength of the reduced pellets increases. In the meantime， the pore size and porosity of the reduced pellets increase as well. However， compared with that of the non-MgO-bearing pellets (i.e.，the mass fraction of MgO-bearing flux is 0)， the increasing magnitude of the pore size and porosity of the MgO-bearing pellets (the mass fraction of MgO-bearing flux is 2.0%) becomes relatively less and the distribution of pore size is relatively closer before and after reduction. It is found that the reduction swelling is a main factor for governing the compressive strength of the reduced pellets and the reduction compressive strength (RCS) is higher with a lower reduction swelling index(RSI).

Key words: MgO, iron ore pellet, reduction strength, reduction swelling, porosity

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