Patent ID: 8651856
Filing Date: 2014-02-18
Classification: F27B,F27D

Abstract:
1. A heat recovery method in the manufacture of anodes in an annular anode furnace that has at least one furnace unit with a heating-up zone, a firing zone and a cooling zone that respectively feature a plurality of furnace chambers in the form of heat exchangers that are interconnected by heating flues and serve for accommodating the anodes, said method comprising: withdrawing a first partial quantity of hot air produced in the cooling zone by waste heat of the anodes into the heating-up zone using a first suction device, said first partial quantity of hot air operating the heating-up zone; withdrawing a second partial quantity of hot air only from the cooling zone to another heat exchanger that is realized independently of the annular anode furnace using a second suction device, wherein heat transfer medium that serves for operating at least one of the heat exchangers is directly heated with the hot air withdrawn only from the cooling zone.