INVESTIGATION OF ALUMINUM ELECTROLYSIS IN VERTICAL TYPE ELECTROLYSIS CELL USING CARBON-COMPOSITE CATHODE CONTAINING TITANIUM BORIDE .2. EVALUATION BY GAS-ANALYSIS

To investigate the detailed evaluation for aluminium (Al) electrowinni ng in vertical type electrolysis cell using carbon (C)-composite mater ial containing titanium boride (TiB2) as a cathode, the current effici ency was determined by in situ gas analysis, The current efficiency de termined by the gas analysis was larger than those determined by metal weight analysis. The current efficiency was influenced by the distanc e between anode and cathode, current density, etc.:The Al electrolysis could be carried out at the narrow distance of 1.5 cm. The current ef ficiency increased with increasing current density. Based on the resul ts obtained it can be expected to decrease a power comsumption in Al e lectrowinning and increase output of Al.