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通过建立液态钢渣粒化过程的物理和数学模型,阐述液态钢渣气淬粒化工艺的粒化机理,利用FLUENT软件对不同条件下粒化过程流场进行数值模拟,模拟结果表明:氮气射流分为射流初始段、射流基本段和射流消散段三个阶段;射流的最高速度分布在射流中心线上,且速度的大小与射流的径向距离成反比;射流的冲击动能以及射流的流场分布规律对液态钢渣的粒化效果影响显著;拉瓦尔喷嘴的理想直径为D=10 mm;马赫数的增加可提高射流的冲击动能,有利于钢渣的粒化。
Through the establishment of the physical and mathematical models of the liquid steel slag granulation process, the granulation mechanism of the liquid steel slag granulation process is expatiated. The flow field of the granulation process under different conditions is numerically simulated by using FLUENT software. The simulation results show that: The initial jet section, the basic jet section and the jet dissipative section. The maximum jet velocity is distributed on the jet centerline and the velocity is inversely proportional to the jet radial distance. The jet kinetic energy and the jet flow field distribution The effect of liquid steel slag granulation effect is significant; Laval nozzle ideal diameter D = 10 mm; Mach number increase can increase jet impact kinetic energy, is conducive to the granulation of steel slag.