耐火材料向钢液中的传氧机理及影响因素

Oxygen Transfer Mechanism from Refractory to Molten Steel and Influencing Factors on It

根据相平衡和热力学理论,并通过热力学计算,研究了耐火材料向钢液中的传氧机理以及影响因素·研究结果表明,在钢液深脱氧的情况下,耐火材料中闭口气孔内的氧化物组分分解所产生的平衡氧分压要明显高于钢液中的平衡氧分压,这是使耐火材料向钢液中传氧的主要原因;根据耐火材料的种类和组成配比的不同,耐火材料向钢液中的传氧能力亦不同;钢液中的氧含量越低,越会促进耐火材料中氧化物组分的分解和向钢液中的传氧·

Based on phase equilibrium and thermodynamics, the oxygen transfer mechanism from refractory to molten steel and relevant influencing factors were studied. The results showed that the equilibrium partial pressure of O_2 in closed pores due to decomposition of oxides in the refractory is much higher than that in molten steel which has been deoxidated to a high degree. The fact reveals what are the main influencing factors on the oxygen transfer from refractory to molten steel. In addition, according to what kind of the refractory used and its composition, the ability to transfer oxygen will be different from other refractories. The lower the oxygen content in molten steel, the more the oxygen transferring from refractory to molten steel and the components of decomposed.