Herein, plant trials are conducted to investigate the effect of slag modification on inclusions in Si–Mn‐killed 304 stainless steels. The slag basicity has a significant influence on inclusion compositions in 304 stainless steels. The Al₂O₃ content in inclusions shows a slight increase tendency with the slag basicity of 1.9. The addition of CaO increases the slag basicity from 1.9 to 2.2, which is beneficial to the removal of inclusions while increasing the Al₂O₃ content in inclusions from roughly 20% to 40%. The low slag basicity lowers the Al₂O₃ content in inclusions to around 20% while resulting in a higher total oxygen (TO) at the ladle furnace (LF) end. A kinetic model of slag–steel–inclusion reactions is developed to simulate the effect of slag modification on inclusion composition using FactSage Macro Processing. Evolutions of slag, steel, and inclusions during the slag modification process are well predicted.

中文翻译：

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炉渣变质对硅锰杀死的304不锈钢中夹杂物的影响

在这里，进行工厂试验以研究炉渣改性对Si-Mn杀死的304不锈钢中夹杂物的影响。炉渣碱度对304不锈钢中的夹杂物成分有重要影响。夹杂物中Al ₂ O _3的含量随炉渣碱度为1.9而略有增加。CaO的添加使炉渣碱度从1.9增加到2.2，这有利于去除夹杂物，同时将夹杂物中的Al ₂ O ₃含量从大约20％增加到40％。低炉渣碱度降低Al ₂ O ₃夹杂物中的金属含量约为20％，同时钢包炉（LF）端的总氧气（TO）更高。建立了炉渣-钢-夹杂物反应的动力学模型，以使用FactSage Macro Processing模拟炉渣改性对夹杂物组成的影响。可以很好地预测炉渣改性过程中炉渣，钢和夹杂物的演变。