东北大学学报(自然科学版) ›› 2013, Vol. 34 ›› Issue (4): 536-540.DOI: -

• 材料与冶金 • 上一篇    下一篇

预氧化对钒钛磁铁矿球团矿相及内部结构的影响

陈双印,储满生,唐珏,吴祥龙   

  1. (东北大学材料与冶金学院,辽宁沈阳110819)
  • 收稿日期:2012-10-23 修回日期:2012-10-23 出版日期:2013-04-15 发布日期:2013-06-19
  • 通讯作者: 陈双印
  • 作者简介:陈双印(1984-),男,湖南衡阳人,东北大学博士研究生;储满生(1973-),男,安徽岳西人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金重大资助项目(51090384);国家高技术研究发展计划项目(2012AA062302,2012AA062304);中央高校基本科研业务费专项资金资助项目(N110202001).

Effects of Preoxidation on Phase Composition and Microstructure of Vanadium TitanoMagnetite

CHEN Shuangyin, CHU Mansheng, TANG Jue, WU Xianglong   

  1. School of Materials & Metallurgy, Northeastern University, Shenyang 110819, China.
  • Received:2012-10-23 Revised:2012-10-23 Online:2013-04-15 Published:2013-06-19
  • Contact: CHU Mansheng
  • About author:-
  • Supported by:
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摘要: 以钒钛磁铁矿为原料制备氧化球团,利用XRD和SEM等手段,考察室温至500,700,900,1000,1100,1200,1250℃7种情况下预氧化球团的物相组成和微观结构.结果表明,当预氧化温度低于500℃时,球团内部发生γ-Fe2O3向α-Fe2O3的转变,未发生氧化反应;当预氧化温度高于500℃时,随着预氧化温度的升高,球团内部的TTM和FeTiO3氧化生成TTH和Fe2TiO5,白色物相(含Fe,V,Ti)聚合长大与黑色物相(Mg,Al,Si相)逐渐分离,且晶型由较为分散的颗粒状向紧密互联、结构力强的互联状转变.

关键词: 钒钛磁铁矿, 预氧化, 物相组成, 微观结构, 晶型

Abstract: Oxidized pellets were prepared with vanadium titaniummagnetite ores. The effects of preoxidation temperature from room temperature to 500, 700, 900, 1000, 1100, 1200, 1250℃ on phase composition and microstructure of the pellets were studied using XRD and SEM. When the preoxidation temperature was under 500℃, the transformation of γFe2O3 to αFe2O3 occurred within the pellets without oxidizing reaction. While the preoxidation temperature was above 500℃, with the increase of the temperature, TTM and FeTiO3 within the pellets were oxidized and formed TTH and Fe2TiO5, the white phase (consisting of Fe, V, Ti) gathered and gradually separated from the black phase(consisting of Mg, Al, Si), and the crystal form transformed from relatively dispersive particles to a form with close interconnection and strong structure force.

Key words: vanadium titaniummagnetite ores, preoxidation, phase composition, microstructure, crystal types

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