Physical simulation of 120 t ladle bottom blown argon gas
SHI Peng-zhao1, TIAN Yu-shi1, XU Li-jun1, GUO Wen-bo2, QIU Sheng-tao1
1. National Research Center of Continuous Casting Technology, Central Iron and Steel Research Institute, Beijing 100081, China; 2. No. 1 Steelmaking Plant, Xinyu Iron and Steel Group Co., Ltd., Xinyu 338001, Jiangxi, China
Abstract：In order to optimize the process parameters such as the bottom blowing position and gas flow rate of the ladle of a domestic steel plant, and to better improve the purity of molten steel,a 1∶3 water model is established for a 120 t ladle in a domestic steel plant. Through physical simulation, the influence of bottom blowing positions and gas flow rates on the mixing time and the condition of steel slag coverage is analyzed. The results show that the mixing time is obviously different with different bottom blowing positions. With the increase of gas flow, ladle blending time integral is on the decline, but the decrease rate tends to small, blow air flow has a best value. When the bottom blowing position is 0.4R-0.6R, and the gas flow rate is between 500-700 L/min, the mixing time from large to small is double bricks 135°> double bricks 90°≥ double bricks 120°. Under the same air blowing capacity, the slag involvement depth caused by single brick is greater than that caused by double bricks, the depth difference is basically 20-70 mm, and the slag eye areas caused by double bricks are larger than that caused by single brick. Considering the mixing time and the condition of steel slag coverage, the optimal layout and operating parameters of the permeable brick are 120°-0.4R-0.6R with gas flow rate of 500-600 L/min.
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2021, Vol. 31 
