Abstract: Based on production data and practice of 30 t VOD unit at the second steelmaking plant, FuSteel, the - effect of initial liquid temperature on yield of chromium, oxygen utilization ratio and oxygen consumption during VOD refining process is analyzed. Results show that in condition of VOD oxygen browning, with increasing initial liquid temperature, it is available to increase Cr yield and decrease oxygen consumption ；in order to obtain better refining effect as the requirement of carbon content in stainless steel is respectively ≤0. 30%, ≤0. 03% and ≤0. 01%, the temperature of liquid before VOD refining should be respectively ≥1 600 °C, 1 650°C and 1 670 °C ； in order to decrease accident of splashing and overflowing, the initial temperature of liquid should be ≥l 580 °C, and to reduce consumption of refractory the initial temperature of liquid should be ≤1 720 °C.

摘要： 以抚钢二炼钢厂30 t VOD生产数据为实践依据,分析了入炉初始钢水温度与VOD精炼过程铬收得率、氧利用率以及耗氧量之间的关系。结果示出,在VOD吹氧冶炼条件下,随着钢水入炉温度的升高,有利于提高铬收得率和氧利用率,降低耗氧量。为得到较好的精炼效果,当不锈钢碳含量的要求分别为≤O.30%C、≤0.03%C和≤0.01%C时,VOD精炼前钢水的温度应分别为≥1600℃、≥1650℃和≥1670℃;为减少喷溅和溢钢事故,钢水初始温度应≥1580℃,为降低耐火材料消耗,钢水温度应≤1720℃。

关键词: VOD, 不锈钢, 钢水温度, 铬收得率, 氧利用率, 喷溅和溢钢