通过在精炼及连铸工位进行系统取样,研究了非金属夹杂物在SPHC钢钙处理过程中的行为变化.结果表明,钙处理前钢中夹杂主要为三角形及不规则形貌的Al2O3夹杂,在LF出站时夹杂物以完全变性及未完全变性的铝酸钙为主,在中间包处则有单纯CaS出现并与钢中已有铝酸钙结合,随着连铸的进行,钢中硫化物夹杂比例增加,铸坯中有更多的CaS生成,并形成环状结构对已变性的铝酸钙进行包裹.
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