预焙铝电解槽散热变化趋势研究

Study on heat dissipation trend of prebaked aluminum reduction cell

铝电解槽的能量平衡关系到电解槽能否平稳运行,同时对节能降耗也会产生重要影响。而决定电解槽能量平衡的关键因素之一就是电解槽各部分的散热分布是否合理。本文首先介绍了电解槽散热区域划分,然后通过对近20年约50个系列200余台电解槽能量平衡测试数据的基础上,进行数据分析处理与挖掘,得出从2000年至今电解槽散热分布特点和散热量变化趋势。由分析结果可以看出,最近20年电解槽散热分布特点呈现三个阶段,第一个阶段是2005-2006年以前,电解槽散热普遍在2.0 V左右;第二个阶段是2011-2012年以前,电解槽散热普通在1.8-1.9V;第三个阶段是最近的2017-2019年,电解槽散热普遍在1.6-1.7V。电解槽散热分布的变化反映出了铝电解节能技术发展的历程及趋势,以及对电解槽能量平衡控制的策略和思路,本研究将为今后铝电解槽能量平衡控制和节能降耗提供理论支撑和数据参考。

The energy balance of aluminum reduction cell is related to its smooth operation,which also has an important impact on the energy saving and consumption reduction.One of key factors determining the energy balance of reduction cells is whether or not the distribution of heat dissipation in each part of the reduction cell is reasonable.Firstly,this paper introduces the division of heat dissipation area in the reduction cell.Then,based on the analysis and excavation of the energy balance test data about 200 reduction cells in some 50 series in recent 20 years,both the distribution characteristics and the change trend of heat dissipation in reduction cells since 2000 are obtained.The analysis results show that there are three stages in the distribution of heat dissipation for reductions cells in the past 20 years.The first stage is the period before 2005~2006,the heat dissipation in reduction cells is generally about 2.0 V;the second stage is 2005~2012,the heat dissipation in reduction cells is generally 1.8~1.9 V;and the third stage is the 2017~2019,the heat dissipation in reduction cells is generally 1.6~1.7 V.The change of heat dissipation distribution reflects the development course and trend of energy saving technology in aluminum electrolysis,which exhibits the strategies and concept of energy balance control in aluminum reduction cells.This study will provide theoretical support and data reference for energy balance control,energy saving and consumption reduction in aluminum reduction cells in the future.