Settling Flow Details in the Flash Smelting Furnace—A CFD-DEM Simulation Study

IF 1.8 Q3 MECHANICS Fluids Pub Date : 2023-10-23 DOI:10.3390/fluids8100283
Jani-Petteri Jylhä, Ari Jokilaakso
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Abstract

The flash smelting furnace has previously been simulated using computational fluid dynamics (CFD). A new approach is to combine CFD and the discrete element method (DEM) for more detailed simulations of the different phenomena that occur as copper matte droplets settle through a slag layer. One of the most important phenomena found is the formation of a channeling flow which carries matte droplets faster through the slag. However, such phenomena cannot be directly observed in the flash smelting furnace settler due to the extreme temperatures of the opaque molten slag inside the furnace, therefore alternative methods are required for validating the phenomenon. In this work, the simulated channeling flow is validated with a sphere–oil model. The phenomenon was similar in all of the studied cases, although in the experimental setup the spheres settled faster in the oil model than in the simulations. The differences were most likely caused by the cohesion of the spheres and slight differences in the properties provided by the manufacturer and real properties for the oil and the spheres, and by the fact that simulation ignores surface tension and changing air–oil and water–oil interfaces.
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闪速熔炼炉沉降流程细节CFD-DEM模拟研究
闪速熔炼炉已经用计算流体力学(CFD)进行了模拟。一种新的方法是将CFD和离散元方法(DEM)结合起来,更详细地模拟铜锍液滴在熔渣层中沉降时发生的不同现象。发现的最重要的现象之一是形成了一个通道流,它使磨砂液滴更快地通过炉渣。然而,由于炉内不透明熔渣的极端温度,在闪速熔炼炉沉降器中无法直接观察到这种现象,因此需要其他方法来验证这种现象。本文采用球油模型对模拟的窜流进行了验证。这种现象在所有的研究案例中都是相似的,尽管在实验装置中,球体在石油模型中的沉降速度比在模拟中要快。这种差异很可能是由于球体的凝聚力和制造商提供的油和球体的实际性能的微小差异,以及模拟忽略了表面张力和空气-油和水-油界面的变化造成的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Fluids
Fluids Engineering-Mechanical Engineering
CiteScore
3.40
自引率
10.50%
发文量
326
审稿时长
12 weeks
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