BOTTOM OF ALUMINIUM ELECTROLYZER Russian patent published in 1997 - IPC

FIELD: electrolytic aluminium production. SUBSTANCE: invention is aimed at increasing operation life of electrolyzer bottom and grade of aluminium produced from cryolite/silica smelts. Level of carbon-containing interblock joint in block-assembled electrolyzer bottom is below the level of working surface of bottom block. Level of joint may be the same as that of lower (great) base of trapezoidal part of bottom block. Level of carbon-containing interblock joint may also constitute 1-2 heights of cavity of lower part of bottom block. Cavity thus arising in the upper part of joint may be filled with nonconducting material, advantageously silica. EFFECT: improved cathode unit of electrolyzer. 3 cl, 2 dwg, 1 tbl