摘要：为探究煤粉喷吹微观机理,分析煤粉喷吹行为规律及其它相态物料对其影响,采用计算流体动力学(CFD)技术对高炉内多相流动过程进行建模。以某1 750 m³炼铁高炉为研究对象,将喷入的煤粉作为粉相,计算得到典型炉况下多相态的温度、速度等物理量可视化结果,以及高煤比时炉内温度状态。实践运行与计算结果表明,适当调整布料结构、富氧量等因素,可进一步加大煤粉喷吹量,从而提高炉利用系数,降低焦比和生产成本。

关键词： 高炉;煤粉喷吹;数值模拟

Abstract： Based on the microscopic mechanism of pulverized coal injection process， the computational fluid dynamic （CFD） technology was applied to the multiphase flow modeling and simulation in an iron-making blast furnace. In the simulations， considering the pulverized coals as powder phase， the different physical parameters of phases were visualized under the present local operation. The powder flow was strongly affected by the air and coke particles under the cohesive zone， and by the ore particles upon the cohesive zone. Then， the simulated and experimental blast furnace with higher rate of coal injection showed that the ability of pulverized coal injection could be enhanced to a certain extent. The higher pulverized coal injection rate decreased coke rate and production cost， improved the utilization coefficient of blast furnace by adjusting the burden distribution and oxygen enrichment. 

Keywords： blast furnace； pulverized coal injection； numerical simulation