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利用Fluent软件对1650mm×220mm板坯结晶器建立了三维稳态数学模型,对三种方案条件下结晶器内钢液流动进行模拟.结果表明,结晶器的宽度对结晶器表面速度分布影响显著,随着结晶器宽度的增加,结晶器表面的速度分布越来越不均匀.表面的最大速度受到多种参数的影响,包括浸入式水口入口钢液的速度、水口出口角度和水口浸入深度等,其中入口钢液的速度影响最为显著.最优方案为:铸坯宽度1100mm,底部结构为山形和出口角度向下30°的水口,水口浸入深度120mm,流量为11.6m3·h-1,入口速度为0.8384m·s-1.
The three-dimensional steady-state mathematical model of 1650mm × 220mm slab mold was set up by Fluent software to simulate the flow of molten steel in the mold under three different conditions.The results show that the width of the mold has significant influence on the surface velocity distribution of the mold, With the increase of crystallizer width, the velocity distribution on the surface of the mold becomes more and more uneven.The maximum velocity of the surface is affected by many parameters, including the velocity of the molten steel at the inlet of the immersion nozzle, the outlet angle of the nozzle and the immersion depth of the nozzle, Among them, the speed of entry molten steel is the most significant.The optimal plan is: the slab width is 1100mm, the bottom structure is mountainous and the outlet angle is 30 ° downward, the inlet is 120mm deep, the flow rate is 11.6m3 · h-1, 0.8384m · s-1.