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为了模拟高炉块状带内矿石还原过程对料层透气性的影响,根据实际高炉料层的运动升温及煤气成分的变化情况,设计了模拟矿石在高炉块状带行程的试验方法,建立了能够实时监测料层压差和矿石还原度的试验装置,给出了矿石逐渐升温还原对料层透气性影响的量化评价指标,并实测了某高炉烧结矿、球团矿、块矿、混合矿石在逐渐升温过程中的料层压差和还原度变化,得出逐渐升温还原后的粉化指标和料层压差增加率具有很好的一致性。与原有的低温还原粉化测试方法相比,该方法更适合用于判断高炉整个块状带内矿石还原对料层透气性的影响,更有利于评价矿石性能对高炉操作的影响。试验还研究了原始粒径、还原失重、还原温度、还原时间、加热、转鼓、泡水对矿石粉化程度的影响。
In order to simulate the influence of the ore reduction process on the permeability of the material in blast furnace block, a test method was proposed to simulate the lump travel of the ore in the blast furnace according to the actual temperature rise of the blast furnace layer and the gas composition. The experimental device for real-time monitoring of the formation pressure difference and the ore reduction degree is given, and the quantitative evaluation index of the influence of the ore temperature gradually reducing on the permeability of the material layer is given. And some blast furnace sinter, pellet, lump ore and mixed ore Gradually warming process of the material layer pressure difference and reduction degree change, draw the temperature reduction reduction of the powderification index and material layer pressure increase rate has a good consistency. Compared with the original low-temperature reduction pulverization test, this method is more suitable for judging the influence of ore reduction in the whole lump of blast furnace on the permeability of the material layer, and is more conducive to evaluate the impact of ore properties on blast furnace operation. The effects of primary particle size, weight loss, reduction temperature, reduction time, heating, druming and bubbling water on the degree of ore pulverization were also studied.