东北大学学报:自然科学版 ›› 2015, Vol. 36 ›› Issue (12): 1757-1760.DOI: 10.12068/j.issn.1005-3026.2015.12.019

• 资源与土木工程 • 上一篇    下一篇

鲕状赤铁矿深度还原过程中温度对磷分布规律的影响

李治杭, 韩跃新, 孙永升, 高鹏   

  1. (东北大学 资源与土木工程学院, 辽宁 沈阳110819)
  • 收稿日期:2014-11-04 修回日期:2014-11-04 出版日期:2015-12-15 发布日期:2015-12-07
  • 通讯作者: 李治杭
  • 作者简介:李治杭(1990-),男,陕西安康人,东北大学博士研究生; 韩跃新(1961-),男,内蒙古赤峰人,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(51134002); “十二五”国家科技支撑计划项目(2012BAB14B05).

Effect of Temperature on Phosphorus Distribution During Coal-based Reduction of Oolitic Iron Ore

LI Zhi-hang, HAN Yue-xin, SUN Yong-sheng, GAO Peng   

  1. School of Resources & Civil Engineering, Northeastern University, Shenyang 110819, China.
  • Received:2014-11-04 Revised:2014-11-04 Online:2015-12-15 Published:2015-12-07
  • Contact: HAN Yue-xin
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摘要: 针对鲕状赤铁矿石深度还原过程中有害元素磷在金属相中富集的问题,对深度还原过程中磷富集过程进行了研究.在配碳系数为2.0,还原时间80min,还原温度分别为1200,1225,1250和1275℃条件下,分析了磷元素在还原物料中的分布规律及还原过程中磷元素的迁移路径.试验结果表明:在1225℃以下时,磷元素含量由渣相内部到相界面逐渐升高,由相界面到金属相内部逐渐降低;1250℃以上时,磷含量由渣相到金属相内部逐渐升高.此外,还原过程中磷元素的走向为:磷元素最初主要存在于磷酸盐中,反应开始后磷酸盐与C反应,磷元素被还原为单质磷溶入铁,并在金属相中富集.

关键词: 鲕状赤铁矿, 磷, 分布规律, 迁移路径

Abstract: As harmful element phosphorus concentrated in iron particles during reduction of oolitic iron ore, the reaction process of phosphorus migration was investigated. During the reaction process, reaction time is 80 min and reaction temperature are 1200, 1225, 1250 and 1275℃, respectively. Phosphorus distribution are analyzed in slag phase and metal phase and phosphorus migration route is also discussed. The results show below 1225℃ phosphorus content gradually increases from slag phase to phase interface, but decreases from phase interface to inner metal phase, and phosphorus content increases from phase interface to inner metal phase while temperature increases above 1250℃. Phosphorus migration route is also confirmed eventually. Firstly phosphorus exists in phosphate, phosphate reacts with carbon when the reaction begins, and then simple substance phosphorus is created and migrates into metal phase.

Key words: oolitic iron ore, phosphorus, distribution regularities, migration route

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