高铝硅钢渣系物性对钢包衬粘渣的影响  

Influence of Physical Property of Silicon Steel Slag with High Alumina on Ladle Slag Buildup

作　　者：张明军[1] 陈伟庆[1] 成泽伟[1] 邵俊宁 贾祥超 庞炜光 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]首钢迁钢有限责任公司,迁安064404

出　　处：《硅酸盐通报》2015年第4期1160-1164,共5页Bulletin of the Chinese Ceramic Society

摘　　要：本文研究了高铝硅钢炉渣的熔化温度、物相组成、钢包残砖粘渣层物相结构，探讨了钢包粘渣机理。结果表明，刚玉包衬发生粘渣是因为碱度2左右的CaO—SiO2-MgO—A12O3系炉渣的熔化温度过高、粘度过大，在浇铸温度下易析出高熔点的镁铝尖晶石。提高炉渣碱度可减少甚至避免镁铝尖晶石析出，进而显著降低高铝渣熔化温度。防止钢包粘渣的合理渣系为：碱度CaO／SiO２在3～8范围，A12O3含量在25％～40％，MgO含量在10％以下。In this paper, melting temperature and mineralogical phases of silicon steel slag with high alumina, phase structure of ladle slag buildup were investigated. The mechanism of ladle sidewall buildup was also discussed. The results indicate that corundum sidewall occurs slag buildup just because CaO-SiO2-MgO-AL2O3 slags with basicity about 2 result in high melting temperature and viscosity, and high melting point phase spinel is easy to precipitate under casting temperature. To enhance the slag basicity can decrease or avoid spinel ＇s precipitate, which will decrease the melting temperature significantly. The appropriate slag composition to avoid ladle slag buildup should be： basicity CaO/SiO2 range 3-8, A1203 range 25%-40% , MgO under 10%.

关 键 词：高铝渣 粘渣 粘度 熔化温度 碱度 

分 类 号：TF06[冶金工程—冶金物理化学]