Method for the regenerative treatment of mainly clay-bound foundry old sand
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United States of America Patent
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May 26, 1992
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N/A
app pub date -
Nov 28, 1990
filing date -
Nov 28, 1989
priority date (Note) -
Expired
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Abstract
A method for regenerating foundry old sand which method combines impact and shearing stress of the sand grains which occurs with simultaneous dust removal. The dust removed by suction contains non-burned bentonite and carbon parts which can be re-used in the same way as the regenerated material of core sand. Environmental pollution and quantities for dumping are drastically reduced.
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