预焙炭阳极环形槽炭碗设计的仿真研究

doi:10.12068/j.issn.1005-3026.2020.12.007

东北大学学报:自然科学版 ›› 2020, Vol. 41 ›› Issue (12): 1715-1720.DOI: 10.12068/j.issn.1005-3026.2020.12.007

预焙炭阳极环形槽炭碗设计的仿真研究

李拓夫，陶文举，王兆文，孔令宇

(东北大学冶金学院，辽宁沈阳110819)

收稿日期:2020-04-28 修回日期:2020-04-28 出版日期:2020-12-15 发布日期:2020-12-22
通讯作者: 李拓夫
作者简介:李拓夫(1989-)，男，辽宁锦州人，东北大学博士研究生; 王兆文(1964-)，男，辽宁沈阳人，东北大学教授，博士生导师.
基金资助:
国家自然科学基金资助项目(51804071，51874086，51804069)；中央高校基本科研业务费专项资金资助项目(N2025024).

Numerical Study on the Ringly-Slotted Stub Hole Design for Prebaked Anode

LI Tuo-fu， TAO Wen-ju， WANG Zhao-wen， KONG Ling-yu

School of Metallurgy， Northeastern University， Shenyang 110819， China.

Received:2020-04-28 Revised:2020-04-28 Online:2020-12-15 Published:2020-12-22
Contact: WANG Zhao-wen
About author:-
Supported by:
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摘要/Abstract

摘要： 在工业铝电解槽阳极中，炭碗底部由于存在较大的铁-炭间隙而无法导电.针对这一弊端，提出了一种环形开槽的阳极炭碗设计.采用数值模拟的方法，考察了环形槽炭碗设计对阳极物理场的影响及机理.数值计算结果表明，在重力作用下，工业阳极炭碗底部存在1.2mm左右的初始铁-炭间隙，而环形槽炭碗设计能够将炭碗底部的初始铁-炭间隙降低到约0.2mm.因此，阳极运行时，采用环形槽炭碗的阳极中磷生铁和钢爪的热膨胀能够使炭碗底部的铁-炭间隙闭合，从而与炭碗底部产生接触应力，进而增加炭碗导电面积、改善阳极电流分布.采用环形槽炭碗设计能够降低阳极电压降约22mV，而对阳极温度场分布没有显著影响.

关键词: 铝电解节能, 阳极结构优化, 阳极电压降, 数值模拟, 多物理场耦合

Abstract: For the industrial anodes in Hall-Héroult cells， electric current can not pass through the stub hole bottom because of the large initial cast iron-to-carbon air gap at the stub hole bottom. A ringly-slotted stub hole design for the anode was proposed to solve this problem. The effects of the proposed design on the anode and the corresponding mechanism were evaluated by numerical simulations. The initial cast iron-to-carbon air gap at the stub hole bottom in the industrial anode under the gravity was 1.2 mm， while that in the proposed design was reduced to 0.2mm. Consequently， the thermal expansion of the cast iron and the stub caused the air gap to close during operation， which resulted in the contact pressure at the bottom of stub hole， increased the electrical contact area and improved the current distribution. The ringly-slotted stub hole leads to an anode voltage reduction of 22 mV， but shows insignificant effect on the temperature distribution of anodes.

Key words: aluminium electrolysis energy conservation, anode structure optimization, anode voltage drop, numerical simulation, Multiphysics coupling

中图分类号:

TF821

李拓夫，陶文举，王兆文，孔令宇. 预焙炭阳极环形槽炭碗设计的仿真研究[J]. 东北大学学报:自然科学版, 2020, 41(12): 1715-1720.

LI Tuo-fu， TAO Wen-ju， WANG Zhao-wen， KONG Ling-yu. Numerical Study on the Ringly-Slotted Stub Hole Design for Prebaked Anode[J]. Journal of Northeastern University Natural Science, 2020, 41(12): 1715-1720.

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预焙炭阳极环形槽炭碗设计的仿真研究

Numerical Study on the Ringly-Slotted Stub Hole Design for Prebaked Anode

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