大型铝电解槽四场优化节能技术的开发应用

Development and application of energy saving technology for four fields optimization of large-scale aluminum reduction cell

铝电解槽的电场、磁场、流速场和热场的分布直接影响电解槽的电压、电流效率、电能消耗等主要技术经济指标,优化电解槽的四场是实现电解槽低电压、低能耗稳定运行的重要手段针对早期电解槽母线设计存在的缺陷,开发了不停电改造母线、凸型阴极、电解槽全保温、阳极深开槽、低电压运行下的能量与物料双平衡控制等四场优化节能技术,实施后铝电解槽能耗明显降低。

The distribution of electric field, magnetic field, velocity field and thermal field of aluminum reduction cell directly influences the key technical and economic indexes of eleetrolyzer, such as voltage, current efficiency, power consumption and so on. The optimization of four fields of reduction cell is an important mean to achieve steady operation of reduction cell under conditions of low voltage and low energy consumption. In view of the shortages existed in bus design of reduction cell at early stage, the energy saving technologies for four fields optimization, such as the bus transformation without power outage, convex type cathode, the full thermal insulation of reduction cell, the depth slotting of anode, and the double balance control of energy and material under low voltage, etc. were developed, and the energy consumption of aluminum reduction cell obviously reduced after implementation.