Method for preparing a foundry sand mixture

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United States of America Patent

PATENT NO 11707777
APP PUB NO 20210260647A1
SERIAL NO

17256280

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Abstract

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A method for recovery of moulding sand from a foundry sand mixture, which includes at least one proportion of moulding material fragments or loose moulding material grains, which accumulates when a cast part is demoulded from a casting mould as a result of the destruction of casting cores which have been formed from the moulding sand and an inorganic binder. The method includes: a) mixing the foundry sand mixture with cleaning water to form a slurry in order to dissolve the inorganic binder residues contained in the foundry sand mixture and optionally present additives from the moulding sand and to rinse them from the foundry sand mixture, and b) separating the cleaning water contaminated with the inorganic binder residues from the moulding sand contained in the slurry, wherein the process temperature of the slurry formed in step a) is 50 to 200° C.

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Patent Owner(s)

Patent OwnerAddress
NEMAK S A B DE C VNUEVO LEON MEXICO STATE OF MEXICO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Dargai, Viktoria Saly, HU 1 0
Ensinger, Mark St. Florian, AT 1 0
Hartl, Walter Weiten, AT 6 34
Mokre, Alexander Linz, AT 2 0
Ritt, Bettina Sierning, AT 1 0

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