东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (2): 223-227.DOI: 10.12068/j.issn.1005-3026.2015.02.015

• 材料与冶金 • 上一篇    下一篇

添加硅铁对钛精矿直接还原-渣铁分离的影响

吕学伟1, 宋兵1, 韩可喜2, 张凯1   

  1. (1.重庆大学 材料科学与工程学院, 重庆400044; 2.攀钢集团钢铁研究院, 四川 攀枝花600017)
  • 收稿日期:2013-10-09 修回日期:2013-10-09 出版日期:2015-02-15 发布日期:2014-11-07
  • 通讯作者: 吕学伟
  • 作者简介:吕学伟(1982-),男,山东莱芜人,重庆大学副教授,博士.
  • 基金资助:
    国家重点基础研究发展计划项目(2013CB632603).

Effect of Ferrosilicon Addition on Direct Reduction of Ilmenite Concentrate and Its Separation Between Iron and Slag

LYU Xue-wei, SONG Bing, HAN Ke-xi, ZHANG Kai   

  1. 1. School of Materials Science and Engineering, Chongqing University, Chongqing 400044, China; 2. Panzhihua Iron & Steel Research Institute, Panzhihua 600017, China.
  • Received:2013-10-09 Revised:2013-10-09 Online:2015-02-15 Published:2014-11-07
  • Contact: LYU Xue-wei
  • About author:-
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摘要: 利用碳热还原方法研究了硅铁添加对钛精矿还原及渣铁分离效果的影响.结界表明:硅铁可提高还原反应速率和铁的金属化率,在1380℃还原30min的金属化率达到84.5%.添加硅铁还可明显缩短还原球团冶炼周期,降低渣中金属铁含量,提高渣铁分离效率及钛渣品位(TiO2的质量分数为84.75%).同时运用FactSage软件对钛渣液相线及黏度进行了理论计算,结果表明:添加硅铁对钛渣黏度影响不大,但可增大钛渣的液相区域,从而有利于金属铁的聚集长大及分离.理论计算很好地解释了实验结果.

关键词: 硅铁, 直接还原, 渣铁分离, FactSage

Abstract: The influence of Fe-Si additive for the reduction of ilmenite and its separation between iron and slag after smelting were discussed by the carbotherme reduction method. The results show that Fe-Si can improve the reduction rate and metallization. 84.5% of the metallization can be achieved after reduction of 30min at 1380℃. The reduction pellets’ smelting cycle can be shorten, and the separation efficiency of slag with iron and the titanium slag’s grade can be improved if adding Fe-Si. The TiO2 in the titanium slag can be reached 84.75%. The titanium slag liquidus and viscosity were calculated by FactSage software, and the result shows that the viscosity of the titanium slag has no obvious change, but the liquid area of titanium slag can be increased, which is beneficial to the accumulation, growing up and separation of metallic iron. Theoretical calculations well explain the experimental results.

Key words: ferrosilicon, direct reduction, separation between iron and slag, FactSage

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