NUMERICAL SIMULATION FOR THE SPLASHING BEHAVIOR IN AN OXYGEN CONVERTER PROCESS

摘要

The three-dimensional model has been developed to analyze the transient mixing process of a vertical static oxygen converter with top and bottom oxygen lances blowing oxygen into the liquid steel and slag. Multiphase Volume of Fluid (VOF) method was employed to model three phases including oxygen, liquid steel, and liquid slag to simulate the behaviors of splashing. Numerical simulation was conducted to clarify the transient phenomena of oxygen injection into the vessel and the formation of splashing. The modeling simulations show that the splashing is quite violent when the bottom lances inject oxygen with high flow rate. Some liquid steel and slag were splashed onto the higher lining and tap hole, even out of the vessel which cause kidney formation and buildup. When bottom lances inject oxygen with low flow rate, the splashing is much better. The research results revealed the kidney formation and buildup, and the optimized flow rate was obtained.