Heat treatment of metal castings and in-furnace sand reclamation
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United States of America Patent
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N/A
Issued Date -
Aug 23, 2001
app pub date -
Apr 20, 2001
filing date -
Sep 29, 1989
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The method and apparatus for reclaiming substantially pure sand from a heat treating furnace; wherein a casting with sand core and/or sand mold, comprising sand bound by a combustible binder, attached thereto is introduced into the heat treating furnace; or, wherein portions of sand core and/or sand mold that are not attached to a casting are introduced into the heat treating furnace. Wherein, the reclaiming within the furnace is carried out, in part, by a fluidizer that promotes binder combustion by one or more process of agitating, heating, and oxygenating. Wherein, the characteristics of the reclaimed sand are selectively controlled by controlling the dwell time of the sand is within the heat treating furnace.
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