Abstract: Based on the softkilled process for ultralow carbon steel, the relationship between oxidizability of top slag and oxygen activity in steel was calculated using software Factsage, and then the effect of components of top slag on sulphur distribution ratio was also calculated. The results indicated that for ultralow carbon steel making,w(FeO+MnO) in top slag should be controlled below 15% at least, and w(CaO)/w(Al2O3) should be controlled 254.0. Industrial test showed that after the w(FeO+MnO) is controlled below 15% through the slag property changing treatment, the resulfurization can be avoidable, the sulfur content of products is controlled lower than 0.005%, and the requirements for the steel can be met.
,王谦,何生平,曾建华. 超低碳钢弱脱氧工艺下炉渣组分的控制张国兴[J]. 钢铁, 2011, 46(5): 38-42.
ZHANG Guoxing1,WANG Qian1,HE Shengping1,ZENG Jianhua2. Slag Composition Control in SoftKilled Process for UltraLow Carbon Steel. Iron and Steel, 2011, 46(5): 38-42.