Method and apparatus calcining mineral raw materials utilizing solid fuel
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United States of America Patent
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-
Mar 7, 1989
Issued Date -
N/A
app pub date -
Oct 13, 1981
filing date -
Feb 28, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Fine particulate solid fuel is utilized in the calcining or uniflow shaft of a uniflow regenerative shaft furnace having outlet openings of fuel lances of the furnace arranged with a uniform distribution over the cross-section of the furnace shaft in a horizontal plane between the preheating zone and the calcining zone of the furnace. The fuel feed is maintained constant with time by a dosing system through which fuel is supplied through feed lines to the fuel lances. Due to the uniform distribution of solid fuel which is accomplished, a calcined material is obtained which has a quality comparable to that which may be achieved through calcining with gaseous or liquid hydrocarbons.
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