熔渣中金属液滴沉降过程流体力学模拟

Hydrodynamic simulation of metal droplet settlement in molten slag

建立熔炼渣中金属液滴沉降过程的数学模型,研究不同粘性模型下金属/熔渣界面张力对液滴沉降速度以及拖曳力的影响。结果表明:对于较小直径的液滴,Laminar模型和RNG k-ε湍流模型能够准确预测液滴最终沉降速度;界面张力对液滴沉降速度有影响,且影响作用随着液滴尺寸增大而逐渐增大;“RNG+CSS”模型可以准确描述液滴沉降过程和液滴沉降速度的变化。结合数学模型和实验数据,推导出耦合界面张力作用下拖曳力系数计算公式。该模型揭示熔炼渣中金属液滴沉降过程机理,为实际生产中降低渣中有价金属含量提供理论指导。

A mathematical model of the metal droplet settlement process of smelting slag was established.The effect of interfacial tension between the metal and slag phases on the droplet settlement velocity and drag force under different viscosity models was studied.The results showed that the Laminar and RNG k−εturbulence models accurately predict the final settlement velocity of smaller diameter droplets.The interfacial tension affects the settlement velocity of the droplet,and the effect gradually increases as the droplet size is increased.The“RNG+CSS”model accurately describes the droplet settlement process and the change in the droplet settlement velocity.The drag force coefficient formula under coupling interfacial tension was derived with the established mathematical model and experimental data.This model reveals the mechanism of the settlement process of metal droplets in smelting slag and provides theoretical guidance for reducing the content of valuable metals in slag in actual production.