高炉风口风量分配及回旋区形状的模拟

Simulation of Size of Tuyere Raceway and the Tuyere Blast Volume Distribution for Blast Furnace

以流体力学有关理论为基础,应用FLUENT软件建立高炉鼓风系统的模型。根据高炉操作工艺的需要,通过改变高炉某几个风口的直径,堵塞某几个风口,模拟研究这种操作对各风口间风量分配的影响;模拟研究风口回旋区的形状,并确定风量、风压、焦炭粒度和风口直径等对风口回旋区形状的影响。结果表明,堵塞风口将导致各风口间风量分配的不均匀性加大;风口直径减小时,该风口处的风量将显著减少;风口回旋区深度随风量、风温、风口直径以及风口插入深度增加而增加,随风口前焦炭粒度的增加而减少。

Based on the theories of fluid mechanics, a model of blast furnace supply system was established using the FLUENT software. According to the needs of blast furnace operation process, influences of different operation ways on the tuyere blast distribution were analyzed by changing diameter of the tuyere and plugging some tuyeres. The shape of the raceway was visualized to determine effects of the blast volume, blast pressure, coke size and tuyere diameters. The results reveal that when the tuyere was plugged , the blast volume distribution could exhibit more inhomogeneous, while diameter of the tuyere was reduced from 130 mm to 120 mm, the blast volume can be decreased significantly. In addition, tuyere raceway depth was increased with increasing in the blast volume, blast temperature, tuyere diameter and tuyere insertion depth, while it was decreased with the increase of coke size.