Journal of Northeastern University Natural Science ›› 2019, Vol. 40 ›› Issue (2): 207-211.DOI: 10.12068/j.issn.1005-3026.2019.02.011

• Materials & Metallurgy • Previous Articles     Next Articles

Comparative Study on Metallurgical Performance of Different Vanadium-Titanium Magnetite Burdens

HE Zhan-wei, XUE Xiang-xin   

  1. School of Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2017-12-04 Revised:2017-12-04 Online:2019-02-15 Published:2019-02-12
  • Contact: XUE Xiang-xin
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Abstract: The phase composition and microstructure of sinter and pellet of two typical vanadium-titanium magnetites were studied. The softening-smelting-dripping properties of burden(sinter+pellet)were measured through simulation in laboratory. The results show that high chromium vanadium-titanium magnetite sinter is mainly composed of magnetite, hematite and a small amount of calcium ferrite and silicate, while high titanium vanadium-titanium magnetite sinter contains more calcium ferrite, silicate and perovskite. However, there are no significant differences in phase composition and microstructure between the two pellets. Compared with high titanium vanadium-titanium magnetite burden, high chromium vanadium-titanium magnetite burden has higher melting temperature and narrower melting range, which are beneficial to blast furnace. The matrix phase of non-dripped slag of high chromium vanadium-titanium magnetite is melilite, but the non-dripped slag of high titanium vanadium-titanium magnetite contains pyroxene as matrix phase and TiC around metallic iron.

Key words: vanadium-titanium magnetite, softening-melting-dripping, microstructure, sinter, pellet

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