Heating – Processes of heating or heater operation – Including passing – treating or conveying gas into or through...
Patent
1992-05-04
1992-11-24
Yuen, Henry C.
Heating
Processes of heating or heater operation
Including passing, treating or conveying gas into or through...
134 2, 432 96, 432 97, 432 99, F27D 108
Patent
active
051658887
ABSTRACT:
A method and apparatus for thermally reclaiming used foundry sand is disclosed. The apparatus includes a vertically disposed furnace having a combustion chamber therein. A sand dispersion system supported within the combustion chamber disperses the free falling sand particles to expose the particles to a combustion supporting furnace environment. Disposed immediately below the furnace is a sand retention chamber in which the sand is accumulated. Heated air is introduced into the retention chamber to maintain the combustion supporting environment. Residual coatings remaining on the sand particles are thermally removed in the retention chamber.
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Donahue James L.
Rothschild John J.
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