Method of preparing a particulate refractory composition for use in the manufacture of foundry moulds and cores, corresponding uses, and reclamation mixture for thermal treatment

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United States of America

PATENT NO 11311931
APP PUB NO 20210339308A1
SERIAL NO

17273496

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Abstract

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Described is a method of preparing a particulate refractory composition for use in the manufacture of foundry moulds and cores from spent foundry moulds or cores formed of refractory material and a binder containing water glass, the method comprising the following steps: providing broken material from spent foundry moulds or cores or preparing broken material from spent foundry moulds or cores, wherein the broken material comprises particles and/or aggregates of particles of refractory material having hardened water glass binder on their surface, mixing the broken material with particulate amorphous oxide comprising silicon dioxide in an amount of 85% by weight or more, based on the total amount of the particulate amorphous oxide, to give a mixture and subjecting the mixture to a heat treatment at a temperature of 400° C. or higher. Also described are a corresponding use, a reclamation mixture, and a method of making a foundry mould or core.

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Patent Owner(s)

Patent OwnerAddress
HÜTTENES-ALBERTUS CHEMISCHE WERKE GESELLSCHAFT MIT BESCHRÄNKTER HAFTUNGWIESENSTRASSE 23 DÜSSELDORF 40549

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Egeler, Nicolas Krefeld, DE 6 6
Li, Xin Beijing, CN 946 7137
Lustig, Christian Düsseldorf, DE 11 121
Reinold, Mirko Hannover, DE 1 0
Schweinefuß, Maria Hannover, DE 3 1

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