STUDY OF ANODE VOLTAGE DROP AFFECTING FACTORS OF PRE-BAKED CELL

According to the present situation of high power consumption of aluminium electrolysis,anode voltage drop,circuit voltage and working voltage have been theoretically calculated for a 186kA series aluminium electrolytic cell anode. The factors influencing anode voltage have been analysed. The results show that,circuit voltage drop takes about 23 percentage of the working voltage,and anode voltage drop takes about 41 percentage of the circuit voltage drop; The calculated value of the anode voltage drop is about 391. 15mV; the main factors influencing anode voltage are steel-carbon voltage drop and carbon block voltage drop,the secondary factors are explosive welding voltage drop and steel stub voltage drop. It is feasible to reduce anode voltage drop. The cathode voltage drop also has a big account of circuit voltage drop,it is feasible to reduce cathode voltage drop as well. It is better to use the rule of amplification to study and analyse anode voltage drop of higher than 300kA series prebaked aluminium reduction cells.