Oxygen-powder injection from a BOF lance has received much attention in attempts to improve refining efficiency, but knowledge of particle-induced erosion to the lance nozzle, as one of the foreseeable concerns in such a process, is still limited. Thus, numerical studies on gas-particle flow through a Laval nozzle were performed to clarify what the nozzle erosion distribution is and how it is influenced by particle motion. The results show that the most serious erosion occurs in the nozzle convergent section, where nozzle erosion can be further intensified by increasing the powder feeding rate or particle size. The powder blowing parameters have a significant influence on the erosion rate and distribution. Increasing the powder feeding rate or decreasing the particle size worsens erosion downstream of the nozzle divergent section. Therefore, in order to reduce erosion, the powder feeding rate and particle size should be smaller than 2.0 kg/s and larger than 10 μm, respectively.

从 BOF 喷枪喷射氧粉在提高精炼效率的尝试中受到了很多关注，但对喷枪喷嘴的颗粒引起的侵蚀（作为这种过程中可预见的问题之一）的知识仍然有限。因此，对通过 Laval 喷嘴的气体颗粒流进行了数值研究，以阐明喷嘴侵蚀分布是什么以及它如何受颗粒运动的影响。结果表明，最严重的冲蚀发生在喷嘴会聚段，通过增加送粉速度或粒度可以进一步加剧喷嘴的冲蚀。喷粉参数对冲蚀速率和分布有显着影响。增加粉末进料速率或减小颗粒尺寸会加剧喷嘴发散部分下游的侵蚀。所以，