钢包耐火材料对钢中氧含量及钢水温降的影响

Influence of ladle refractories on oxygen content and temperature dropping of molten steel

利用氧势指数分析了钢包耐火材料组成、配比以及加热温度对耐火材料分解和向钢中传氧的影响,并利用热传导理论计算了钢包包衬耐火材料的绝热性能对钢水温降的影响.结果表明:随着耐火材料材质由碱性向中性和酸性的顺序变化及温度的升高,耐火材料的氧势指数增大,由耐火材料向钢中的传氧能力增加;通过使用绝热性能良好的耐火材料,可以显著降低钢水热损失,减少钢水温降.

The influences of chemical composition of refractories,raw material proportion and heating temperature on the decomposition of refractory composites and oxygen translation from refractories to molten steel were discussed by using index of oxygen potential,and the influence of the properties of insulating material on the temperature dropping of molten steel was calculated according to the thermal conduction theory.The results showed that with the change of refractory kind from alkalinity to neutrality and acidity,and with the increasing of heating temperature,the index of oxygen potential raises and the probability of oxygen translation to molten steel increases.By using qualified insulating material,heat loss of molten steel could be obviously inhibited and the temperature dropping of molten steel could be decreased.