240 kA铝电解槽新型节能阴极内衬结构的研究与应用

某公司采用的铝电解槽在低电压生产工艺下存在角部伸腿肥大、电解质水平偏低、换极后电压摆动偏多等问题,利用电解槽大修机会,通过选用异型阴极钢棒、高石墨冷捣糊,改进人造伸腿,采用磷生铁浇铸阴极钢棒炭块组装技术和新型内保温材料,对电解槽阴极内衬结构进行优化改进。改进后,新型节能阴极内衬结构电解槽炉底压降降低了39 mV,铝液电解直流电耗降低了249 kW h/t-Al,保温效果和节能效果显著提高,确保了铝电解槽在低电压生产工艺下的能量平衡和长期稳定运行。

The Research and Application of New Energy-Saving Cathode Lining Structure for 240 kA Aluminum Reduction Cell

The aluminum electrolytic cell used in a company had the problems of large angle extension legs,low electrolyte level and excessive voltage swing after pole change under low voltage production process.The cathode lining structure of aluminum reduction cells was optimized and improved by selecting special-shaped cathode steel bars and high graphite content cold ramming paste,improving artificial extension legs,and using phosphorus pig iron casting cathode steel bar carbon block assembly technology and new internal insulation materials.After improvement,the bottom pressure drop of the new energysaving cathode lining structure aluminum reduction cell was reduced by 39 mV,and the direct current consumption of aluminum liquid electrolysis was reduced by 249 kWh/t-Al,and the insulation effect and energy saving effect were significantly improved,which ensured the energy balance and long-term stable operation of aluminum reduction cell under low voltage production process.