It is, the oxygen evolution metal anode in order it electrolyzes to pick the aluminum with the disassembly

摘要

Also, for the electrowinning of aluminum by decomposition of alumina dissolved in a molten electrolyte that is based on cryolite, capable of operating anode current density of 1.3A / cm ² from 1.1, in the oxygen evolving anode metal Yes, the metal anode, comprising an alloy of silicon and copper, nickel, iron, manganese, optionally. Preferably, the alloy consists of Si 0.4~0.6w% Ni of 64~66w%, Fe of 25~27w%, Mn of 7~9w%, and Cu, and 0~0.7w%. 2.1 to 2.89, in the range of 2.3 to 2.6, preferably, the weight ratio of Ni / (Ni + Cu), greater than 0.98, the weight ratio Ni / Fe is in the Cu / Ni The weight ratio of Mn / Ni, the weight ratio is from 0.09 to 0.15 and less than 0.01. The alloy surface can include nickel ferrite produced by the pre-oxidation of the alloy. It is intended with the pre-oxidized surface Optionally, the alloy can be coated on the outside surface of the coating comprising cobalt oxide CoO. [Selection] Figure Figure 1