Process for calcining mineral raw materials in a uniflow regenerative shaft furnace
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United States of America Patent
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Feb 16, 1982
Grant Date -
N/A
app pub date -
Oct 22, 1979
filing date -
Dec 29, 1978
priority date (Note) -
Expired
status (Latency Note)
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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.
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International Classification(s)
- 1979 Application Filing Year
- C22B Class
- 142 Applications Filed
- 0 Patents Issued To-Date
- 0 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 11 Citation Count
- C22B Class
- 0 % this patent is cited more than
- 43 Age