渣组成对钢水洁净度的影响

 在实验室基础上对比研究了w(CaO)/w(SiO2)为5、w(Al2O3)为25%的渣系A，w(CaO)/w(SiO2)为8、w(Al2O3)为46%的渣系B，与高强度合金结构钢液在1600 ℃条件下反应90 min后钢水洁净度的变化，研究结果表明：随着渣系由A到B，钢中总氧质量分数平均值由12.25×10-6降低到9.25×10-6，硫质量分数平均值由19×10-6降低到8.63×10-6，炉渣的硫分配系数LS由7~17增加到120~260；渣系A、渣系B与合金钢液反应后钢中夹杂物大部分是钙镁铝硅酸盐类夹杂，并且得出渣系B精炼条件下钢中这类夹杂熔点明显低于渣系A精炼条件下的此类夹杂。

Influence of Slag Composition on Steel Cleanliness

Two different slags, A ((mass% CaO)/(mass% SiO2)=5, Al2O3=25 mass%) and B ((mass% CaO)/(mass% SiO2)=8, Al2O3=46 mass%), were investigated to show the relation between slag composition and molten steel cleanliness based on laboratory experiments. The results show that, cleanliness of molten steel refined by slag B was obviously better than that of molten steel refined by slag A after 90 minutes’ reaction at 1600 ℃:the average total oxygen content were 9.25×10-6 vs 12.25×10-6,the average sulphur contents were 8.63×10-6 vs 19×10-6,the sulphur partifion coefficients in the range of 120 260 and 7 17 respectively; most of the inclusions in molten steels reacted by slag A or slag B were calcium magnesium aluminium silicate inclusion and the melting point of the inclusions in molten steel refined by slag B was obviously lower than that of the inclusions in molten steel refined by slag A.