绿色低碳深度节能铝电解技术体系在330 kA电解系列上的应用

Application of Green Low-carbon Deep Energy-saving Aluminum Electrolysis Technology System on 330 kA Electrolysis Series

由于国家双碳战略目标的提出和实施,电解铝行业的技术升级方向逐渐转为节能型改造。某铝厂330 kA电解槽存在能耗高和电流效率较低的问题,经复核发现该电解槽母线磁场分布不均且数值过大,上部结构的下烟道集气形式效果差,同时采用传统气控打壳下料系统,不利于降低氧化铝下料对电解槽过热度和热平衡的冲击。针对这些问题,本文采用绿色低碳深度节能铝电解技术体系,应用网络化自平衡母线技术、“长健康寿命”内衬结构及热平衡技术及节能型上部结构对电解系列进行节能优化。优化后电流强度提升到350 kA,吨铝铝液直流电耗降低了634 kW·h/t-Al,电流效率提高1.89%,节能增产效果显著。

Due to the proposal and implementation of the national carbon peak and carbon neutrality strategic goal,the technical upgrading direction of the electrolytic aluminum industry has gradually shifted to energy-saving transformation.The 330 kA electrolytic cell in an aluminum plant has the problems of high energy consumption and low current efficiency.After review,it is found that the magnetic field distribution of the cell bus is uneven and the value is too large,and the lower flue gas collection form of the superstructure has poor effect.At the same time,the traditional gas-controlled shelling and blanking system is not conducive to reducing the impact of aluminum oxide blanking on the superheat and heat balance of the electrolytic cell.In view of these problems,this paper adopted the green low-carbon deep energy-saving aluminum electrolysis technology system,applied network self-balancing bus technology,“long healthy life”lining structure and heat balance technology and energy-saving superstructure to optimize the energy saving of the electrolysis series.After optimization,the current intensity was increased to 350 kA,the DC power consumption per ton of aluminum liquid was reduced by 634 kW·h/t-Al,and the current efficiency was increased by 1.89%,and the effect of energy saving and production increase was significant.