Thermal regeneration of foundry sand
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United States of America Patent
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Aug 22, 2017
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app pub date -
Feb 19, 2008
filing date -
Feb 19, 2007
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Abstract
The invention relates to a method for regenerating used foundry sand, which is contaminated with soluble glass, wherein: used foundry sand is provided, which is tainted with a binding agent made of the soluble glass, to which a particle-shaped metal oxide is added; and the used foundry sand is subjected to a thermal treatment, wherein the foundry sand is heated to a temperature of at least 200° C., thereby obtaining regenerated foundry sand. The invention further relates to regenerated foundry sand, as that obtained from using the method.
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