Journal of Northeastern University Natural Science ›› 2015, Vol. 36 ›› Issue (1): 63-67.DOI: 10.12068/j.issn.1005-3026.2015.01.014

• Materials & Metallurgy • Previous Articles     Next Articles

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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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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