东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (1): 63-67.DOI: 10.12068/j.issn.1005-3026.2015.01.014

• 材料与冶金 • 上一篇    下一篇

钒钛磁铁矿直接还原试验研究

孙瑜, 董越, 郑海燕, 沈峰满   

  1. (东北大学 材料与冶金学院, 辽宁 沈阳110819)
  • 收稿日期:2013-12-06 修回日期:2013-12-06 出版日期:2015-01-15 发布日期:2014-11-07
  • 通讯作者: 孙瑜
  • 作者简介:孙瑜(1985-),女,辽宁营口人,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(51074040); 辽宁省自然科学基金资助项目(201202064); 中央高校基本科研业务费专项资金资助项目(N120402004).

Experimental Study on Direction Reduction of Vanadium-Bearing Titanomagnetite

SUN Yu, DONG Yue, ZHENG Hai-yan, SHEN Feng-man   

  1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2013-12-06 Revised:2013-12-06 Online:2015-01-15 Published:2014-11-07
  • Contact: ZHENG Hai-yan
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摘要: 在热力学分析的基础上研究了实验室条件下钒钛磁铁矿配煤直接还原的特点,考察了还原机理及还原温度、反应时间和配碳量对金属化率的影响.结果表明:采用直接还原可使钒钛磁铁矿中铁的氧化物优先还原为金属铁,钛仍以氧化物的形态存在;随着温度升高,球团金属化率呈上升趋势,且上升趋势随之减缓;在xC/xO=0.9∶1时,延长反应时间金属化率增加,但反应时间过长金属铁会被再氧化,反应时间控制在20min为宜;在xC/xO=1.1∶1时,40min内未出现再氧化现象;低配碳(xC/xO=0.8∶1)时,球团的金属化率随还原时间、还原温度的增加而增加,1300℃下还原10min后金属化率即达到了90 %以上.

关键词: 钒钛磁铁矿, 直接还原, 热力学分析, 金属化率, 含碳球团

Abstract: The direct reduction behavior of vanadium-bearing titanomagnetite pellets containing coal was experimentally studied in laboratory based on thermodynamic analysis. The reduction mechanism and influences of reduction temperature, reduction time,and the xC/xO on metallization ratio were investigated. The results showed that direct reduction iron (DRI) can be obtained in this process, while titanium exists as the form of titanium oxide in the slag. With the increase of reduction temperature, the metallization ratio increases quickly first and then slowly. For carbon-containing pellets with 0.9 of xC/xO, the metallization ratio reached the highest at 20min and DRI was re-oxidized after 20 min. When the xC/xO in the pellets was 1.1∶1, no re-oxidization happened within 40min. With less coal addition (0.8 of xC/xO), there were similar phenomena with that of 1.1 of xC/xO and the metallization ratio was up to 90 % at 1300℃ after 10min.

Key words: vanadium-bearing titanomagnetite, direction reduction, thermodynamic analysis, metallization ratio, pellets containing coal

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