东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (2): 207-211.DOI: 10.12068/j.issn.1005-3026.2019.02.011

• 材料与冶金 • 上一篇    下一篇

不同钒钛磁铁矿炉料冶金性能的对比研究

何占伟, 薛向欣   

  1. (东北大学 冶金学院, 辽宁 沈阳110819)
  • 收稿日期:2017-12-04 修回日期:2017-12-04 出版日期:2019-02-15 发布日期:2019-02-12
  • 通讯作者: 何占伟
  • 作者简介:何占伟(1989-),男,甘肃张掖人,东北大学博士研究生; 薛向欣(1954-),男,辽宁沈阳人,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(51604065).

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
  • About author:-
  • Supported by:
    -

摘要: 取两种典型的钒钛磁铁矿对应的烧结矿和球团矿,研究其物相组成和微观结构并进行比较分析.模拟现场高炉条件,在实验室测定炉料软熔滴落性能,并对未滴落渣进行物相分析和微观结构分析.结果表明:高铬钒钛磁铁矿烧结矿以磁铁矿、赤铁矿为主,有少量的铁酸钙和硅酸盐,而高钛钒钛磁铁矿烧结矿铁酸钙和硅酸盐较多,还出现明显的钙钛矿;两种钒钛磁铁矿球团矿没有明显差异.相比高钛钒钛磁铁矿炉料,高铬钒钛磁铁矿炉料有高的熔化温度,较窄的熔化区间,其更有利于高炉的顺行.高铬钒钛磁铁矿未滴落渣以黄长石为基质相,而高钛钒钛磁铁矿未滴落渣以辉石为基质相,在金属铁周围遍布较多粒状TiC.

关键词: 钒钛磁铁矿, 软熔滴落, 微观结构, 烧结矿, 球团矿

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

中图分类号: