Process for treating old foundry sand for reuse in place of core sand
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United States of America Patent
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Nov 17, 1992
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N/A
app pub date -
Sep 4, 1991
filing date -
Sep 5, 1990
priority date (Note) -
Expired
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Abstract
The present invention relates to a process for treating old foundry sand for reuse in place of core sand wherein the precleaned sand grains are subjected to further abrasive-thermal treatment so as to volatize and remove basic constituents adhering to the precleaned sand grains.
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