Heating – Processes of heating or heater operation – Controlling flame position or work atmosphere
Patent
1979-10-22
1982-02-16
Straub, Gary P.
Heating
Processes of heating or heater operation
Controlling flame position or work atmosphere
423175, 423637, 432 79, 432 96, C22B 2620, F27D 322, F27D 2300, C01F 1106
Patent
active
043157351
ABSTRACT:
Either sulphur-containing raw materials or sulphur-containing fuels may be used in the calcination of mineral raw materials in a calcining furnace, with significant desulphurization of the calcined material being achieved if, on the one hand, cooling air introduced into the cooling zone of the furnace is removed at the upper end of the cooling zone thereof through exhaust ducts and if, on the other hand, the flue gases are free of oxygen and have a carbon monoxide content of 1 to 5% by volume. In order to obtain this composition of the flue gases, the combustion process can either be performed in the calcining zone of the calcining shaft of the furnace with a deficiency of air or a gaseous, liquid or solid fuel can be supplied by means of fuel tubes located at a transfer duct between the furnace shafts.
REFERENCES:
patent: 2654589 (1953-10-01), Somogyi
patent: 3003756 (1961-10-01), Steffensen
patent: 3074706 (1963-01-01), Schmid et al.
patent: 3761567 (1973-09-01), Parsons
patent: 3771946 (1973-11-01), Hofer et al.
Fussl Erwin
Scheibenreif Karl
Maerz Ofenbau AG
Straub Gary P.
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