F - Mech Eng,Light,Heat,Weapons – 23 – J
Patent
F - Mech Eng,Light,Heat,Weapons
23
J
39/1
F23J 3/00 (2006.01) F27D 25/00 (2010.01) F27D 17/00 (2006.01)
Patent
CA 1243839
Abstract of Disclosure The present invention relates to a method for preventing deposits or build-ups of dust in off-gas channels for dust-containing off-gases from electrothermal smelting furnaces. This is done by blowing an additional gas tangentially into the furnace off-gas channels at the positions where build-ups or deposits of dust normally occurs. Hence a gas spiral is provided between the inner wall of the furnace off-gas channels and the dust-containing, hot-furnace off-gas. Recirculated and cooled furnace off-gas is preferably used as additional gas. For open furnaces where the furnace off-gas is completely combusted before it enters into the furnace off-gas channels, air can be used as additional gas. The temperature of the additional gas is preferably kept below the sintering temperature of the dust in the furnace off-gas.
478284
Aasen Torbjýrn
Thogersen Bjarne
Elkem A/s
Macrae & Co.
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