F - Mech Eng,Light,Heat,Weapons – 27 – B
Patent
F - Mech Eng,Light,Heat,Weapons
27
B
39/55
F27B 1/02 (2006.01) C04B 2/12 (2006.01)
Patent
CA 1138197
ABSTRACT OF THE DISCLOSURE 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 desul- phurization 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 composi- tion 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.
337069
Fussl Erwin
Scheibenreif Karl
Maerz Ofenbau Ag.
Marks & Clerk
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