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METHOD FOR PREVENTING DUST DEPOSITS OR GROWTHS IN GAS EXHAUST CHANNELS IN ELECTROTHERMAL MELTING STOVES, BUT ALSO FROM OTHER SOURCES OF EXHAUST GAS EXTRACTING DUST, AND ACCORDINGLY FURNISHED GAS EXHAUST
METHOD FOR PREVENTING DUST DEPOSITS OR GROWTHS IN GAS EXHAUST CHANNELS IN ELECTROTHERMAL MELTING STOVES, BUT ALSO FROM OTHER SOURCES OF EXHAUST GAS EXTRACTING DUST, AND ACCORDINGLY FURNISHED GAS EXHAUST
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.
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