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为了应对高电价对铝电解行业的冲击,同时根据白天和晚上电价的不同,对铝电解槽的电流强度进行调整(白天降低电流,晚上升高电流)以降低生产成本。本文在黄河鑫业铝厂进行工业测试与试验,通过ANSYS有限元仿真软件分别建立了在不同电流密度下的铝电解槽阴极热应力场模型和铝电解槽单阳极电热场模型,并对其进行了正确性验证。通过考察不同电流强度下的温度场分布、阴极应力,发现低电流强度时对侧部的保温性要求较高,高电流时可以适当的改善底部散热条件,其它部位温度场变化不大;同时在控制温度场的波动下,最大拉应力的差值为0.2MPa,相对于本身拉应力的数量级而言,其影响不明显,阴极应力的变化不会影响正常的生产过程。
In order to cope with the impact of high electricity prices on the aluminum electrolysis industry, the current intensity of the aluminum reduction cell is adjusted according to daytime and nighttime electricity prices (reducing the current during the day and increasing the current at night) to reduce the production cost. In this paper, the Yellow River Xin industry aluminum factory for industrial testing and testing, finite element simulation software ANSYS established under different current density of the aluminum cell cathode thermal stress field model and the aluminum cell single anode electric field model, and its Correctness verification By investigating the distribution of temperature field and cathodic stress under different current intensities, it is found that the low-current strength requires a high degree of thermal insulation on the side, the bottom cooling condition can be properly improved at high current, and little changes in the temperature field at other locations. Under the fluctuating of temperature field, the maximum difference of tensile stress is 0.2MPa, which is insignificant with respect to the magnitude of tensile stress itself. The change of cathodic stress will not affect the normal production process.