高炉炉料运动过程数学模型的建立及其数值模拟

ESTABLISHMENT OF MATHEMATICAL MODEL ANDSIMULATION OF BLAST FURNACE BURDENMOVEMENT PSOCESS

建立了高炉炉料一维非线性动力学数学模型，通过对其进行归一化处理，得到了反映煤气粘性力、炉墙摩擦力、渣水及铁水浮力等对炉料运动影响的６个准数．用该简化模型可得到与其它模型相同的结果．应用该模型计算了不同孔隙度炉料相应的临界煤气流速度和临界压力．研究了实际煤气流速度与临界煤气流速度之差对炉料运动过程的影响，给出了控制炉料稳定顺行的煤气流速度．

A 1-D mathematical model of movemefit process of blast furnace burden was establishedand through its normalization six dimensionless numbers which reveal action of gas viscous drag, wallauction, buoyancy of slag and hot metal on movement of burden were obtained. The conclusion obtainedby the simplified model is consistent with that by other models. The critical gas stream speed and criticalpressure of some kinds of voidage burden were simulated, and the induence of difference between operationalgas stream velocity and critical gas flow velocity on the movement of blast fUrnace burden was also studied.The gas stream speed for controlling stable smooth movement of blast furnace burden are demonstrated.