Numerical simulation for heat transfer behavior of copper slag ladle under air-cooling mechanism

IF 4.9 2区工程技术 Q1 ENGINEERING, MECHANICAL

International Journal of Thermal Sciences Pub Date : 2024-10-04 DOI:10.1016/j.ijthermalsci.2024.109458

Ruinan Zhu , Chaowei Ma , Yulei Ma , Yong Yu , Cheng Tan , Jianhang Hu , Hua Wang

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Abstract

Copper slag ladle cooling process is divided into two stages: air-cooling and water-cooling, is one of the important processes in copper production process from copper slag flotation recovery of valuable metals. This study investigates the transient heat transfer behavior of copper slag ladle during air-cooling mechanism based on the finite-volume method. The innovative aspect of this research lies in development of a 1:1 scale 3D model of slag ladle based on industrial-scale dimensions, obtaining the relevant thermophysical parameters of copper slag by experiment, and validating simulation results against actual industrial production data. The results of study show that: (i) The temperature distribution of copper slag within slag ladle exhibits a “concentric circle” pattern with the formation of a “liquid core” zone, indicating that the temperature is significantly higher in central region compared to periphery, revealing a notable temperature gradient during the air-cooling process; (ii) The heat flux is most concentrated in the central region of slag ladle, suggesting that the heat transfer intensity is the greatest in this area, the temperature variation of copper slag in proximity to this region is the most pronounced; (iii) The cooling path of copper slag proceeds from outer layers to inner layers, with the cooling rate decreasing from fast to slow, reflecting the temperature change trend of copper slag during air-cooling, which transitions from rapid to gradual cooling. This study provides new perspectives and data support for exploring air-cooling process of copper slag ladle and contributes to the further advancement of this field.

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空气冷却机制下铜渣钢包传热行为的数值模拟

铜渣包冷却过程分为空冷和水冷两个阶段，是铜生产过程中从铜渣中浮选回收有价金属的重要工艺之一。本研究以有限体积法为基础，研究了铜渣包在空冷过程中的瞬态传热行为。该研究的创新之处在于根据工业规模的尺寸建立了 1:1 比例的渣包三维模型，通过实验获得了铜渣的相关热物理参数，并将模拟结果与实际工业生产数据进行了验证。研究结果表明(i) 铜渣在渣包内的温度分布呈现 "同心圆 "模式，并形成 "液芯 "区域，表明中心区域的温度明显高于外围区域，揭示了空冷过程中显著的温度梯度；(ii)热通量在渣包中心区域最为集中，表明该区域的传热强度最大，铜渣在该区域附近的温度变化最为明显；(iii)铜渣的冷却路径由外层向内层进行，冷却速度由快到慢，反映了铜渣在空冷过程中由急冷到渐冷的温度变化趋势。该研究为探索铜渣钢包的空冷过程提供了新的视角和数据支持，有助于该领域的进一步发展。

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

International Journal of Thermal Sciences 工程技术-工程：机械

CiteScore

8.10

自引率

11.10%

发文量

531

审稿时长

55 days

期刊介绍： The International Journal of Thermal Sciences is a journal devoted to the publication of fundamental studies on the physics of transfer processes in general, with an emphasis on thermal aspects and also applied research on various processes, energy systems and the environment. Articles are published in English and French, and are subject to peer review. The fundamental subjects considered within the scope of the journal are: * Heat and relevant mass transfer at all scales (nano, micro and macro) and in all types of material (heterogeneous, composites, biological,...) and fluid flow * Forced, natural or mixed convection in reactive or non-reactive media * Single or multi–phase fluid flow with or without phase change * Near–and far–field radiative heat transfer * Combined modes of heat transfer in complex systems (for example, plasmas, biological, geological,...) * Multiscale modelling The applied research topics include: * Heat exchangers, heat pipes, cooling processes * Transport phenomena taking place in industrial processes (chemical, food and agricultural, metallurgical, space and aeronautical, automobile industries) * Nano–and micro–technology for energy, space, biosystems and devices * Heat transport analysis in advanced systems * Impact of energy–related processes on environment, and emerging energy systems The study of thermophysical properties of materials and fluids, thermal measurement techniques, inverse methods, and the developments of experimental methods are within the scope of the International Journal of Thermal Sciences which also covers the modelling, and numerical methods applied to thermal transfer.