| 摘要 |
The invention concerns non-ferrous metallurgy, particularly an anode for the electrolyti-cally obtaining aluminum by the electrolysis of fluoride melts. The anode for obtaining aluminum by means of the electrolysis of melts at a temperature of less than 930°C consists of a base executed of an alloy containing 65-96%wt of iron, up to 35%wt of copper, up to 20%wt of nickel, and one or several additives from molybdenum, manganese, titanium, tantalum, tungsten, vanadium, zirconium, niobium, chromium, aluminum (up to l%wt), cobalt, cerium, yttrium, silicon, and carbon totalling up to 5%wt, and a protective oxide layer consisting mainly of iron oxides and complex oxides of iron, copper, and nickel. The base is made by casting in a metal or sand mold. The protective oxide layer on the anode surface is obtaining by preliminary oxidation in air at a temperature of 850-1050°C or subsequently in the electrolysis process by oxidation with oxygen evolving at the anode. The protective oxide layer at the anode surface has a thickness of 0.1-3.0 mm. |
