Heat recovery in aluminium-melting works

摘要

PCT No. PCT/SE82/00367 Sec. 371 Date Jun. 30, 1983 Sec. 102(e) Date Jun. 30, 1983 PCT Filed Nov. 4, 1982 PCT Pub. No. WO83/01631 PCT Pub. Date May 11, 1983.The invention relates to a method for recovery in a furnace for producing aluminium by melting electrolysis of alumina. The furnace gases are passed through a bed (23) of alumina while the bed being fluidized around a tube coil (25). Then, heat exchange takes place between the furnace gases and an external fluid passing through the tube coil, for recovering heat energy in the furnace gases.