Effect of Air Curtain Device on Furnace Charge Particles Dispersion of Oxygen Bottom-Blowing Smelting Furnace
摘要
The dispersion behavior of furnace charge particles in the melt pool during oxygen bottom-blowing smelting significantly affects smelting efficiency. Using a water model and numerical simulation, the effect of the air curtain device on the dispersion of furnace charge particles was studied with different liquid level depths and bottom-blowing gas flow rates. Particle dispersion in the melt was analyzed using the volume of fluid and discrete phase model methods. The air curtain device enhances the depth of particle entry into the melt, alters interfacial turbulence characteristics, and reduces particle aggregation. After adding an air curtain device, the liquid level depth increased from 1550 mm to 2050 mm, and the average residence time of furnace charge particles in the melt pool rose from 4.886 s to 6.733 s. As the bottom-blowing gas flow rates increased from 1650 Nm3/h to 6600 Nm3/h, the average residence time of furnace charge particles in the melt pool extended from 4.112 s to 7.125 s.