换极对炉门口铝水平的影响规律研究  

Research on Effect Regularity of Anode Replacement on Aluminum Level at Furnace Gate

作　　者：章烈荣 ZHANG Lie-rong

机构地区：[1]青铜峡铝业股份有限公司宁东铝业分公司,宁夏银川750409

出　　处：《有色冶金节能》2022年第6期40-45,共6页Energy Saving of Nonferrous Metallurgy

摘　　要：通过统计分析140台350 kA电解槽炉门口的铝水平,研究其随换极位置的变化规律,建立消除换极影响的修正模型,并以实际电解槽验证。研究方法为首先统计每轮换极单槽对应的铝水平中位数,然后统计更换不同位置阳极时的铝水平与该轮换极的铝水平中位数之差,以及更换相同位置阳极时不同电解槽的铝水平偏差中位数。分析结果表明,铝水平随着换极位置的变化呈现周期性变化:每一轮更换不同位置阳极时,铝水平偏差呈先增大后减小接着维持相同水平的趋势;进电端和出电端的铝水平偏差随换极位置呈现明显的反对称性。可将铝水平偏差四分位间距数(10 mm)作为相应的最大偏差参考值,修正铝水平。经验证,修正后铝水平波动变小,更有利于指导生产。Through statistical analysis of aluminum levels at the furnace gate of 140 sets of 350 kA electrolysis cells, the variation regularity of aluminum level with the position of the anode replacement was studied. A correction model was developed to eliminate the effect from anode replacement and verified by actual electrolytic cells. The research methods are as follows: first, count the median aluminum level corresponding to each rotating pole single cell, then count the difference between the aluminum level when replacing anodes at different positions and the median aluminum level of this rotating pole, and the median aluminum level deviation of different electrolytic cells when replacing anodes at the same position.Analysis results indicate that the aluminum level changes periodically with the change of pole changing position: when changing anodes at different positions in each round, the aluminum level deviation first increases, then decreases, and then maintains the same level;The aluminum horizontal deviation at the incoming and outgoing terminals shows obvious antisymmetry with the pole changing position. The aluminum level deviation interquartile spacing(10 mm) can be used as the corresponding maximum deviation reference value to correct the aluminum level. It is proved that the fluctuation of aluminum level becomes smaller after correction, which is more conducive to guiding production.

关 键 词：电解铝 换极 铝水平 电磁场 规律分析 

分 类 号：TF821[冶金工程—有色金属冶金]