Process for calcining mineral raw materials in a uniflow regenerative shaft furnace

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United States of America Patent

PATENT NO 4315735
SERIAL NO

06087308

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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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.

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Patent Owner(s)

  • MAERZ OFENBAU AG

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fussl, Erwin Zurich, CH 8 41
Scheibenreif, Karl Adliswil, CH 2 20

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