【摘要】 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1 600℃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。更多还原

【Abstract】 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 1 600 ℃: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.更多还原