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首页> 外文会议>CFD modeling and simulation in materials processing 2018 >Effect of Carbide Configuration on the Current Distribution in Submerged Arc Furnaces for Silicon Production—A Modelling Approach
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Effect of Carbide Configuration on the Current Distribution in Submerged Arc Furnaces for Silicon Production—A Modelling Approach

机译：碳化物构型对埋弧电弧炉生产硅中电流分布的影响-一种建模方法

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摘要

Current distribution is critical for good operation of Submerged Arc Furnaces for silicon production. Control systems do not offer this information as it is not directly measureable, but metallurgists operate furnaces based on experienced interpretation of available data. A number of recent dig-outs of industrial furnaces has expanded available information on location dependent charge properties, thus enabling numerical models with reasonably realistic domain configurations. This has the potential to enhance understanding of critical process parameters allowing more accurate furnace control. This work presents computations of electric current distributions inside an industrial submerged arc furnace for silicon production. A 3D model has been developed in ANSYS Fluent using electric potential solver. Electrode, arc, crater, crater wall, and side arc that connects electrode and crater wall are considered for each phase. In this paper the current distributions in electrode, arc and crater wall for different configurations and thickness of the crater walls are presented. The side-arcs are modelled as either a single concentrated arc, or a smeared out arc, in order to capture extreme cases. The main result is that side arc configuration is more important for the fraction of the current passing through the crater wall than the carbide thickness. The current fraction bypassing the main arc through the charge is highly influenced by the ease of contact between electrode and conducting charge material. Qualitatively, the results are in a good agreement with previously published results from literature.
机译：电流分布对于埋弧炉生产硅的良好运行至关重要。控制系统无法提供此信息，因为它无法直接测量，但是冶金学家会根据对可用数据的丰富经验来操作熔炉。最近对工业炉的大量挖掘已经扩展了有关位置相关装料属性的可用信息，从而使数值模型具有合理逼真的域配置。这有可能增强对关键工艺参数的理解，从而可以更精确地控制熔炉。这项工作介绍了用于生产硅的工业埋弧炉内电流分布的计算。使用电势求解器在ANSYS Fluent中开发了3D模型。对于每个阶段，均应考虑电极，电弧，火山口，火山口壁以及连接电极和火山口壁的侧弧。在本文中，给出了不同形状和坑壁厚度的电极，电弧和坑壁中的电流分布。侧弧建模为单个集中弧或拖尾弧，以捕获极端情况。主要结果是，侧弧构型对流经弹坑壁的电流的一部分比碳化物厚度更重要。电极绕过主电弧的电流部分通过电荷会受到电极与导电电荷材料之间易于接触的高度影响。定性地，结果与文献中先前发表的结果吻合良好。

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