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本研究是关于从理论上将高炉喷煤状态最佳化的一种尝试。首先,根据简化的回旋区模型,研究煤粉在回旋区的燃烧状态,并将其研究结果同风管区的燃烧理论相结合,来计算喷煤和鼓风的最佳条件。对这一最佳化提出两个影响因素:其一是完全燃烧因素,它描述回旋区内喷吹煤粉全部燃烧的可能性;其二是所谓煤灰的沉积因素,它描述熔融的灰分沉积到风管和风口壁上的可能性。要实现良好的喷煤操作,二者的值都应低于预想值。应用日本多数高炉喷煤的一些实验数据,对获得的理论进行了检验。为了弄清楚一些操作参数,对完全燃烧和煤灰沉积因素的影响,还做了理论上的一些灵敏性试验。
This study is an attempt to optimize the blast furnace coal injection status theoretically. First, according to the simplified model of the convolution zone, the combustion state of pulverized coal in the raceway is studied. The results of the study are combined with the combustion theory in the duct area to calculate the optimal conditions of coal injection and blasting. Two factors are proposed for this optimization: one is the complete combustion factor, which describes the probability of complete combustion of pulverized coal in the raceway; and the second is the so-called soot deposition factor, which describes the molten ash deposition Possibility to duct and tuyere wall. To achieve a good coal injection operation, both values should be lower than expected. Applying some experimental data from the coal injection in most Japanese blast furnaces, the theory obtained is tested. In order to clarify some of the operating parameters, the effects on the complete combustion and soot deposition factors were also theoretically tested for some sensitivity.