沉淀
聚结(物理)
机械
材料科学
计算流体力学
闪速熔炼
工作(物理)
闪光灯(摄影)
集聚经济
冶炼
冶金
机械工程
化学工程
热力学
工程类
物理
天体生物学
光学
作者
Jani-Petteri Jylhä,Ari Jokilaakso
出处
期刊:Heliyon
[Elsevier BV]
日期:2023-10-29
卷期号:9 (11): e21570-e21570
被引量:2
标识
DOI:10.1016/j.heliyon.2023.e21570
摘要
The flash smelting process is widely used in copper production. In the process, sulfidic feed and flux are oxidized. The heat released in the reactions melts the feed which forms a slag layer through which matte droplets must settle. Understanding the different phenomena affecting the settling is important to minimize losses. Due to the high temperature, simulation methods were employed to study settling. In this work, coupled CFD-DEM was used to study the effect of coalescence and reactions with in-house built submodels and scaled-down geometries. Colliding droplets often coalesce into larger droplets while reactions decrease their size and make them denser. These increase the settling velocity which is further enhanced by the formation of a channeling flow. Channels make the droplet cluster denser causing more collisions. This method enables the phenomena to be studied at the individual droplets' details, although simulating a full-scale process is beyond the available computational resources.
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