摘要
Abstract
The aluminum electrolysis industry is confronted with critical challenges,including excessive energy consumption and substantial carbon emissions.Improving current efficiency and extending the service life of electrolytic cells are pivotal for achieving sustainable,low-carbon production.This study investigates energy-saving and emission-reduction strategies in 240 kA electrolytic cells at Nanping Aluminum Industry Company,focusing on electrolyte composition optimization,cathode improvement,and application of high-conductivity materials.Experimental results demonstrate that elevating calcium fluoride concentration and introducing magnesium fluoride effectively lower the electrolyte's liquidus temperature,thereby improving current efficiency.Furthermore,adopting a curved cathode design with optimized thermal insulation reduces cell voltage by 90 mV and cathode voltage decrease by 32 mV,while improving average current efficiency by nearly 1%.Compared to conventional cells,graphitized cathode carbon blocks exhibit superior performance,including reduced cathode voltage drop,stabilized side ledge formation,and more uniform anode current distribution,leading to a reduction in power consumption exceeding 250 kW·h per ton of aluminum.These findings offer valuable insights and practical approaches for advancing energy efficiency,cost-effectiveness,and environmental sustainability in the aluminum industry.关键词
铝电解/240 kA电解槽/电流效率/电解槽寿命/电解质成分优化Key words
aluminum electrolysis/240 kA aluminum reduction cells/current efficiency/service life/electrolyte composition optimization
