欢迎访问过程工程学报, 今天是

›› 2015, Vol. 15 ›› Issue (1): 62-67.

• 反应与分离 • 上一篇    下一篇

钙钛矿含量对钒钛磁铁矿烧结性能的影响

刘然 刘朝卿 刘小杰 郄亚娜 吕庆   

  1. 河北联合大学冶金与能源学院河北省现代冶金技术重点实验室 河北联合大学冶金与能源学院河北省现代冶金技术重点实验室 东北大学材料与冶金学院 河北联合大学冶金与能源学院 河北联合大学冶金与能源学院
  • 收稿日期:2015-02-12 修回日期:1900-01-01 出版日期:2015-03-13 发布日期:2015-03-13
  • 通讯作者: 刘朝卿

Effect of Perovskite Content on the Properties of Vanadium-Titanium Magnetite Sinter

LIU Ran LIU Chao-qing LIU Xiao-jie QIE Na-ya LV Qing   

  1. College of Metallurgy & Energy, Hebei Key Laboratory for Advanced Metallurgy Technology, Hebei United University College of Metallurgy & Energy, Hebei Key Laboratory for Advanced Metallurgy Technology, Hebei United University Material and metallurgy college of Northeastern University College of Metallurgy & Energy, Hebei United University College of Metallurgy & Energy, Hebei United University
  • Received:2015-02-12 Revised:1900-01-01 Online:2015-03-13 Published:2015-03-13
  • Contact: LIU Chao-qing

摘要: 通过烧结实验,并结合FactSage6.0热力学软件研究钒钛烧结矿中各液相和钙钛矿的生成情况与温度的关系. 结果表明,钒钛烧结矿的转鼓指数为55.20%,低温还原粉化指数仅为25.92%. XRD和矿相结构分析表明,烧结矿冶金性能差的主要原因是钙钛矿的存在破坏了液相黏结作用,骸晶状结构和树枝状钙钛矿明显增加,严重加剧裂纹的扩散,造成烧结矿质量明显下降. 热力学计算得出,低温有利铁酸钙和硅酸钙等液相物质的生成,高温有利于钙钛矿的生成,当温度超过800℃时,钙钛矿含量基本保持稳定,铁酸钙和硅酸钙含量明显降低.

关键词: 钒钛烧结矿, 还原, 钙钛矿, 显微结构, 冶金性能

Abstract: The relationship between the formation of liquid and perovskite in vanadium-titanium magnetite sinter with temperature was studied by experiments and calculation with FactSage6.0 to verify the thermodynamic analysis data. The results show that the tumbler index of vanadium-titanium magnetite sinter is 55.2% and RDI only 25.92%. By XRD pattern and mineral phase structure analysis, the poor metallurgical properties of sinter is mainly due to the presence of perovskite undermining the role of liquid phase bonding, the skeletal structure and dendritic perovskite noticeably increase, which seriously aggravate the proliferation of crack, and result in significantly lower quality of sinter. Thermodynamic calculation shows that the low temperature is advantageous to the formation of liquid-phase calcium ferrite and calcium silicate, but the high temperature to the formation of perovskite. When the temperature is greater than 800℃, the content of perovskite is basically stable, but the content of calcium ferrite and calcium silicate decreases obviously.

Key words: vanadium-titanium magnetite sinter, reduction, perovskite, microstructure, metallurgical property

中图分类号: