Particulate refractory compositions for use in the manufacture of foundry moulds and cores, methods of preparing same and corresponding uses

Particulate refractory compositions for use in the manufacture of foundry moulds and cores, methods of preparing same and corresponding uses

The invention relates to 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 an alkaline binder containing alkali metal ions, the method comprising the following steps:...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: TURLEY, SIMON, EGELER, NICOLAS, FOURBERG, CHRISTIAN, SEEGER, KLAUS, BRAUER, TINO
Format: Patent
Sprache:chi ; eng
Schlagworte:
CASTING
CASTING OF METALS
CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
FOUNDRY MOULDING
PERFORMING OPERATIONS
POWDER METALLURGY
TRANSPORTING
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Beschreibung
Zusammenfassung:The invention relates to 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 an alkaline binder containing alkali metal ions, 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, mixing the broken material with an additive comprising or consisting of one or more particulate constituents selected from the group consisting of aluminum hydroxide, synthetic zeolites and natural zeolites and subjecting the mixture to a heat treatment at a temperature in the range of from 400 to 750 DEG C. Furthermore the invention relates to particulate refractory composition for use in the manufacture of foundry moulds and cores.