材料期刊网

利用数值模拟对煤气流的流场及温度场进行了计算。根据高炉不同部位的煤气流速分布，分析得出炉料分布对中上部煤气流分布和软熔带形状有决定作用，而鼓风制度可快速改变下部煤气流分布，并结合实际高炉中的现象及操作讨论了炉料分布的重要性。结果表明：在高炉生产中，有一个合理的布料制度是高炉操作的关键，径向煤气流分布受炉料透气性分布影响很大，初始煤气流对其影响较小，下部煤气流分布信息很难在上部反应。

Gas flow distribution affects directly the campaign and efficiency of blast furnace (BF).Ｔhe proper and optimum distribution of gas flow should be provided. However, the closeness and complexity bring great difficulty on measuring the gas flow. In practice, gas flow distribution in stack is estimated by measuring top gas distribution. Recently, numerical simulation is a new and effective method for research on gas flow,The flow field and temperature field of gas were calculated with numerical simulation. According to the velocity field of gas in different parts of BF, it was found that burden distribution is a determinant factor of rational gas flow distribution in the mid and upper stack and formation of cohesive zone. In addition,the gas flow distribution in lower stack can be controlled by blasting mode.The importance of burden distribution is discussed with practice of BF. The conclusion is:a good charging system is the keystone of BF operation, the effect of burden permeability on radial distribution of gas flow is great while the effect of initial gas flow distribution is small, and the gas flow distribution in lower stack is hard to be reflected by top gas flow.