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试验50W350无取向电工钢(/%:0.002C,2.66Si,0.25Mn,0.012P,0.002S,0.760Als,0.762Ah)的生产工艺为铁水预处理,100tBOF出钢加300kg石灰,终点[C]≤0.05%,出钢温度1640—1650℃,CAS处理5min,RH吹氧脱碳,加99.0%A1-Fe合金6.69k∥t,70%Si-Fe合金15.7kg/t,230mm板坯连铸过程全程保护浇铸,采用无碳专用碱性覆盖剂。分析结果表明,钢中夹杂物的数量从CAS处理结束后的306.264-/mm2降至连铸