东北大学学报（自然科学版）

东北大学学报:自然科学版 ›› 2014, Vol. 35 ›› Issue (1): 64-66.DOI: 10.12068/j.issn.1005-3026.2014.01.015

• 材料与冶金 • 上一篇    下一篇

耐火材料对钢中氧含量影响的实验研究

刘家占，于景坤   

  1. (东北大学 材料与冶金学院， 辽宁 沈阳110819)
  • 收稿日期:2013-04-09 修回日期:2013-04-09 出版日期:2014-01-15 发布日期:2013-07-09
  • 通讯作者: 刘家占
  • 作者简介:刘家占(1986-)，男，辽宁盖州人，东北大学博士研究生；于景坤(1960-)，男，辽宁康平人，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(51274059).

Experimental Study of Effects of Refractory on Oxygen Content in Molten Steel

LIU Jiazhan， YU Jingkun   

  1. School of Materials & Metallurgy， Northeastern University， Shenyang 110819， China.
  • Received:2013-04-09 Revised:2013-04-09 Online:2014-01-15 Published:2013-07-09
  • Contact: YU Jingkun
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摘要： 通过实验研究MgO-Cr2O3，MgO-Al2O3，Al2O3和MgO-C系耐火材料对钢中氧含量和夹杂物的影响，以及采用热力学原理分析耐火材料向钢中的传氧机理.结果表明:在1600℃下，上述4种耐火材料向钢中的传氧能力依次为MgO-Cr2O3>MgO-Al2O3>Al2O3>MgO-C；耐火材料中闭口气孔内氧化物组分分解所产生的平衡氧分压大于钢中的平衡氧分压，是耐火材料向钢中传氧的根本原因；MgO-C系耐火材料内部生成的CO在钢水界面处发生分解反应并溶入到钢中.

关键词: 耐火材料, 闭口气孔, 钢水, 氧含量, 夹杂

Abstract: The effects of MgOCr2O3， MgOAl2O3， Al2O3 and MgOC refractories on the oxygen content and inclusions of the molten steel were investigated. Based on the thermodynamic theory， the mechanism of oxygen transfer from the refractory to the molten steel was also researched. The results showed that the ability of oxygen transfer of the refractories ranks in a descending order as MgOCr2O3， MgOAl2O3， Al2O3 and MgOC refractories at 1600℃. The main reason of the oxygen transferred from the refractory to the molten steel was that the equilibrium partial pressure of O2 in closed pores of the refractory produced by the decomposition of the oxide contents was much higher than that of in the molten steel. The CO formed inside MgOC refractory decomposed at the interface and dissolved in the molten steel.

Key words: refractory, closed pores, molten steel, oxygen contents, inclusions

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