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作为连铸机中一个重要的设备,中间包是连接非连续的钢包冶炼和连续的结晶器中铸坯凝固的连接设备。中间包在生产超纯净钢过程中承担着重要角色,其主要目的是尽可能细化各钢种的夹杂物并提高钢水纯净度,尤其是当钢包更换而导致进入中间包钢水条件改变时。夹杂物会影响后续压力加工过程,且经常导致材质性能失效。钢水的纯净度对满足客户性能要求起着至关重要的作用。采用比例为1:3的单流中间包水模研究了不锈钢中夹杂物的去除。水模中的浸入式水口上配备有一个粒子计数器,此计数器可以计算出直径大于25μm的粒子分离率。由于粒度分布的相似性,水模中的粒子沉积速率可以转换到实际中间包中的熔体流动。对流动改变装置(例如冲击板)的影响进行了研究,同样也研究了有无冲击板条件下的不同尺寸粒子在中间包的粒子分布状态。采用雷诺应力湍流模型,应用有限体积商业软件FLUENT,进行了数值模拟。离散相的建模采用欧拉-拉格朗日方法。表面处颗粒分离采用一种特殊的边界条件。
As an important equipment in continuous caster, the tundish is connected to the continuous casting ladle smelting and continuous mold casting solidification connection equipment. Tundish plays an important role in the production of ultra-pure steel. The main purpose of tundish is to refine the inclusions of various steels as much as possible and to improve the purity of molten steel, especially when the conditions of molten steel entering the tundish when the ladle is changed. Inclusions can affect subsequent press working and often lead to material failure. The purity of the molten steel plays a crucial role in meeting customer performance requirements. The removal of inclusions in stainless steel was investigated using a single-flow tundish mold of 1: 3 ratio. The immersion nozzle in the mold is equipped with a particle counter that calculates the particle separation rate of more than 25 μm in diameter. Due to the similarities in particle size distribution, the particle deposition rate in the water mode can be shifted to the melt flow in the actual tundish. The influence of flow changing devices (such as impingement plates) was studied. The particle distribution of different size particles in tundish with and without impact plate was also studied. Using Reynolds stress turbulence model, the finite volume commercial software FLUENT was used to conduct numerical simulation. Discrete phase modeling using Euler - Lagrange method. Particle separation at the surface uses a special boundary condition.