高铝渣的流动性和脱硫能力  

Flowability and Desulfurization of High Alumina Blast Furnace Slag

作　　者：王平[1] 刘响[1] 孟庆民[1] 龙红明[1] 李家新[1,2] 郭泽华[1] 

机构地区：[1]安徽工业大学冶金与资源学院,安徽马鞍山243002 [2]东北大学材料与冶金学院,辽宁沈阳110819

出　　处：《过程工程学报》2013年第5期788-794,共7页The Chinese Journal of Process Engineering

基　　金：国家自然科学基金资助项目(编号:51274003);国家自然科学基金与宝钢联合资助项目(编号:U1260101)

摘　　要：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.KTH viscosity model was applied to predict the viscosity of blast fumace slag with high content of alumina, and the viscosity measured by a viscosity meter. The relationship between flowability and chemical composition of the slag and temperature of molten iron was studied. Multiple linear regression analysis was conducted to demonstrate the effects of compositions of slag and molten iron on the desulfurization ability of slag. The results showed that a high proportion of Al2O3 in the slag reduced the flowability of slag. The content of Al2O3 should be controlled below 18.5% （ω）, or at least below 19.5%（ω）. A moderate content of MgO improved the flowability of slag. The mass ratio of （CaO＋MgO） to （SiO2＋Al2O3） in the slag should be controlled at above 0.92, while the mass ratio of CaO to SiO2 should be lower than 1.2. The mass ratio of MgO to Al2O3 should be higher than 0.48, while the MgO content was favorably less than 12.5%（ω） in the slag. The temperature of molten iron and mass ratio of CaO to SiO2 in the slag were the main influential factors on the desulphurization ability of slag, by contrast, MgO content and other factors had little effect on it.

关 键 词：高炉 高铝渣 流动性 脱硫 

分 类 号：TF524[冶金工程—钢铁冶金]