Numerical Simulation of Motion and Distribution of Powder Particles Injected from a Nozzles-Twisted Oxygen Lance in BOF Steelmaking

The pulverized lime/limestone injection by top oxygen blowing lance during the basic furnace (BOF) process has gained much interest in recent years due to its advantages helping slag formation and consequently promoting refining reactions such as dephosphorization. In this pneumatic process, understanding motion behavior distribution of powder particles is importance for regulating designing system reliably efficiently. study, limestone through a novel nozzles-twisted BOF proposed simulated establishing multi-fluid flow model. coupled fluid gaseous liquid steel predicted volume (VOF) method, tracked discrete phase model (DPM). results show that little effect on cavity depth oxygen-powder mixture jets lance, but decreases width. During most gather around hot spots while rest are taken out reflecting stream or penetrate into molten bath. generated swirling enables decrease amount carried going bath, changing paths particles. As result, concentration bath varies. It could be suggested preferred nozzle twist angle 10° favorable conditions