ABSTRACT The stability of the blast furnace (BF) process depends on the quality of raw materials charged into the BF. Apart from various process variables, slag viscosity and slag fluidity are key parameters that require due attention for the stable BF operation. The varying Al2O3 content in slag increases the viscosity of slag and thus hinders the separation of slag from hot metal during the casting process. This leads to the deterioration of hot metal quality because of the entrapment of slag during the slag–metal interfacial reaction. In this work, an attempt is made to utilize the high alumina content raw materials and to reduce the Al2O3 content in the final slag. The high alumina content in slag increases the liquidus temperature and viscosity of slag and causes an adverse effect on BF operations. To countermeasure the effect of alumina, slag volume is increased and basicity along with MgO was increased. It has been demonstrated that MgO addition as a flux is effective for compensating the effect of a high alumina burden. By increasing the MgO in slag, fluidity was maintained to ensure easy separation of slag from hot metal.

中文翻译：

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应对高炉氧化铝炉料较高的方法

摘要 高炉 (BF) 工艺的稳定性取决于装入高炉的原材料的质量。除了各种工艺变量外，炉渣粘度和炉渣流动性是需要适当关注高炉稳定运行的关键参数。熔渣中不同的 Al2O3 含量增加了熔渣的粘度，从而阻碍了熔渣在铸造过程中与铁水的分离。由于在渣-金属界面反应过程中夹带了渣，这会导致铁水质量下降。在这项工作中，尝试利用高氧化铝含量的原材料并降低最终渣中的 Al2O3 含量。炉渣中氧化铝含量高，提高了炉渣的液相线温度和粘度，对高炉运行造成不利影响。为了对抗氧化铝的影响，渣体积增加，碱度随 MgO 一起增加。已经证明添加MgO作为助熔剂对于补偿高氧化铝负荷的影响是有效的。通过增加炉渣中的 MgO，保持流动性以确保炉渣与铁水易于分离。