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高炉上部悬料是高炉生产过程中常见的问题,影响高炉的顺行与高产。块状带压差反映了高炉上部悬料的可能性,更精确地计算块状带压差对高炉生产有重要的指导意义。为了使块状带压差计算结果更符合高炉实际,在原有计算模型的基础上考虑了温度变化影响。基于此模型研究了高压操作与料柱透气性、高炉顺行之间的关系;以迁钢2 560m3高炉为例进行计算,计算结果与高炉块状带压差的实测值相符。研究发现:随着顶压的提高,炉料孔隙度、粒径变化对块状带压差的影响幅度越来越小。将该模型应用于处理高炉上部悬料问题时,根据实际炉况计算出在不同顶压下块状带压差随鼓风量的变化曲线,预测操作过程中块状带压差的变化趋势,为定量化处理高炉上部悬料问题提供了参考数据。
Hanging the upper part of the blast furnace is a common problem in the blast furnace production process, affecting the smooth and high yield blast furnace. The pressure difference of the block zone reflects the possibility of hanging the upper part of the blast furnace. Calculating the pressure difference of the block zone more accurately has an important guiding significance for blast furnace production. In order to make the calculation result of block zone pressure more accord with the actual blast furnace, the influence of temperature change was considered on the basis of the original calculation model. Based on this model, the relationship between high-pressure operation and the gas permeability of the column and the forward flow of the blast furnace was studied. The calculation was carried out with 2 560 m3 blast furnace in Qiangyang Iron and Steel Co., Ltd. The calculation results were in good agreement with the measured values of the pressure difference in the blast furnace block. The results show that with the increase of top pressure, the influence of the change of charge porosity and particle size on the pressure drop in the block zone becomes smaller and smaller. When the model is applied to deal with the problem of hanging material in the upper part of the blast furnace, the change curve of pressure difference with the blast volume at different pressure is calculated according to the actual furnace condition, Reference data is provided for quantifying the problem of hanging material in the upper part of the blast furnace.