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采用KTH炉渣粘度模型和实验研究了高铝渣流动性与炉渣成分、温度的关系,采用多元逐步回归分析方法研究了实际生产中炉渣脱硫能力与炉渣成分、铁水成分的关系.结果表明,高铝渣中Al2O3会降低炉渣流动性,Al2O3含量低于18.5%(ω)为宜,最高不应超过19.5%(ω);渣中适量的MgO可改善炉渣流动性,宜将炉渣四元碱度控制在0.92以上,镁铝质量比控制在0.48以上,同时炉渣二元碱度不超过1.19,MgO含量不超过12.5%(ω).铁水温度和炉渣二元碱度是影响炉渣脱硫能力的主要因素,MgO含量等其他因素作用相对较小.
The relation between slag desulfurization ability and slag composition and hot metal composition in actual production was studied by using the model of KTH slag viscosity and experimental study on the relationship between slag liquidity and slag composition and temperature.The results showed that high aluminum Slag Al2O3 will reduce the slag fluidity, Al2O3 content less than 18.5% (ω) is appropriate, the maximum should not exceed 19.5% (ω); slag slag in the right amount of MgO can improve fluidity, should slag quadruple basicity control Above 0.92, the mass ratio of Mg and Al is controlled above 0.48, while the binary basicity of the slag does not exceed 1.19 and the content of MgO does not exceed 12.5% (ω) .The hot metal temperature and the binary basicity of slag are the main factors affecting the desulfurization capacity of the slag, MgO content and other factors relatively small role.