氧气高炉风口前燃烧带数值模拟

Numerical simulation of combustion zone in foreside of tuyeres of oxygen blast furnace

根据气膜传质控制理论,在物料平衡和能量平衡的基础上,建立了O2高炉风口前燃烧带数学模型,模拟了不同鼓风速度和O2湿度条件下风口前燃烧带内气体各组分浓度场和温度场分布情况。模拟结果表明:改变鼓风速度可以调节风口前燃烧带气体温度和浓度分布,从而调节O2高炉软熔带形状及煤气流分布;增加鼓风湿度可以降低风口理论燃烧温度,增大还原煤气中H2含量。

The mathematical model of combustion zone in foreside of tuyeres of oxygen blast furnace was established on the basis of material balance and energy balance according to the gas film mass transfer control theory. The concentration field and temperature field of gas components in the combustion zone were simulated at different air blast rate and oxygen humidity. The simulation results show that the gas temperature and concentration distribution of the combustion zone can be adjusted by the air blast rate, and the oxygen blast furnace cohesive zone shape and gas flow rate can also be regulated. The increasement of oxygen humidity can reduce the theoretical flame temperature in front of the tuyere and increase the H2 content of the reduction gas.