Pulverized coal utilization in the blast furnace is decided by the particle flow and combustion behaviors in the raceway. Under a specific operating condition, these behaviors are directly related to the lance configuration in the upstream tuyere zone. Focusing on single straight lance, six types of single lance configurations were designed by assembling four parameters in different ways. These four parameters are the lance diameter, lance insertion angle, and the horizontal and vertical distances from the lance tip to the tuyere tip. With different lance configuration schemes applied, the pulverized coal combustion process in the lance–blowpipe–tuyere zone was simulated. The simulation results regarding particle diffusion and combustion behaviors were characterized by three indicators from the viewpoint of a coal plume. They are the plume diffusion angle, diffusion uniformity, and the average plume temperature at the tuyere outlet. To promote coal utilization, the values of these indicators under different configurations were analyzed, yielding two optimal configurations. The first one is to reduce the lance length immersed in the blowpipe–tuyere by 100 mm. The other is to increase the horizontal distance from the lance tip to the tuyere outlet by 50 mm, and the insertion angle to 11° with the lance tip located at the tuyere centerline. The findings can enhance the understanding of the influence mechanism of lance configuration on the coal utilization and provide guidelines for the design of new lance configurations.

高炉中粉煤的利用取决于滚道中的颗粒流和燃烧行为。在特定的操作条件下，这些行为与上游风口区域中的喷枪配置直接相关。围绕单支直喷枪，通过以不同方式组合四个参数设计了六种类型的单支喷枪配置。这四个参数是喷枪直径，喷枪插入角度以及从喷枪尖端到风口尖端的水平和垂直距离。采用不同的喷枪配置方案，模拟了喷枪-吹管-风口区的煤粉燃烧过程。从煤烟羽的角度出发，通过三个指标表征了有关颗粒扩散和燃烧行为的模拟结果。它们是羽流扩散角，扩散均匀性和风口出口处的平均羽流温度。为了促进煤炭利用，分析了这些指标在不同配置下的值，得出了两个最佳配置。第一个是将浸没在吹管风口中的喷枪长度减少100毫米。另一种是将矛杆尖端到风口出口的水平距离增加50 mm，并且在矛杆尖端位于风口中心线的情况下将插入角度增加到11°。这些发现可以增进对喷枪构型对煤炭利用影响机制的理解，并为设计新的喷枪构型提供指导。分析了这些指标在不同配置下的值，得出了两个最佳配置。第一个是将浸没在吹管风口中的喷枪长度减少100毫米。另一种是将矛杆尖端到风口出口的水平距离增加50 mm，并且在矛杆尖端位于风口中心线的情况下将插入角度增加到11°。这些发现可以增进对喷枪构型对煤炭利用影响机制的理解，并为新的喷枪构型的设计提供指导。分析了这些指标在不同配置下的值，得出了两个最佳配置。第一个是将浸没在吹管风口中的喷枪长度减少100毫米。另一种是将矛杆尖端到风口出口的水平距离增加50 mm，并且在矛杆尖端位于风嘴中心线的情况下将插入角度增加到11°。这些发现可以增进对喷枪构型对煤炭利用影响机制的理解，并为设计新的喷枪构型提供指导。喷枪尖端位于风口中心线，插入角度为11°。这些发现可以增进对喷枪构型对煤炭利用影响机制的理解，并为设计新的喷枪构型提供指导。喷枪尖端位于风口中心线，插入角度为11°。这些发现可以增进对喷枪构型对煤炭利用影响机制的理解，并为设计新的喷枪构型提供指导。