Scale-up design of a 300kA magnesium electrolysis cell based on thermo-electric mathematical models
Scale-up design of a 300kA magnesium electrolysis cell based on thermo-electric mathematical models
复制标题
基于热电数学模型的300kA镁电解槽放大设计
DOI：
10.1002/cjce.21940
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发表时间：
2014-07-01
影响因子：
2.1
通讯作者：
Yu, Jianguo
中科院分区：
文献类型：
--
作者：
Liu, Chenglin;Sun, Ze;Yu, Jianguo
镁的生产过程是一个高能耗的过程。电解为镁生产提供了一条降低能耗和温室气体排放的有效途径。本文采用三维热电数学模型对300 kA镁电解槽进行了放大设计。该模型提供了稳态热电场的信息，从而允许评估结构参数（阳极-阴极距离，阳极厚度，阴极厚度，阳极宽度和阳极数量）对电流强度，电阻电压降和电流密度的影响。无因次分析给出了流强与一组无因次数之间的线性关系，通过进一步的综合分析，给出了放大的判据。发现这种放大标准能够预测300 kA镁电解槽的电流强度，误差在1%以内。结果表明，该判据可用于大电流强度镁电解槽的放大设计。
Magnesium production process is highly energy intensive. Electrolysis provides an effective route to reduce energy consumption and greenhouse gas emission for the magnesium production. This paper concerns the scale-up design of a 300kA magnesium electrolysis cell using a three-dimensional thermo-electric mathematical model. The model provides information on the steady-state thermoelectric fields thus allowing the evaluation of the effects of structure parameters (anode-cathode distance, anode thickness, cathode thickness, anode width, and anode number) on the current intensity, resistance voltage drop, and current density. Non-dimensional analyses give a linear relation between the current intensity and a set of dimensionless numbers, which upon further comprehensive analyses, gives a criterion for the scale-up. Such a scale-up criterion is found to be able to predict, within 1%, the amperage of 300kA magnesium electrolysis cells. The results suggest that the criterion could be used for the scale-up design of magnesium electrolysis cells with a high current intensity.