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US 7,188,660 B2Granted
Method for producing a molding sand that is in particular recirculated, for foundry purposes
AssigneeIko Minerals GMBH
InventorsCornelis Grefhorst, Karl Koch
Life of this patent
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Abstract
A method is for producing a moulding sand that is in particular recirculated, for foundry purposes. A mixture of a granular substance and aggregates, such as a binding agent and water, are added to a material that is not capable of swelling in water. The latter material has cavities with a specific surface area of more than 10 m2/g, in particular more than 50 m2/g and preferably more than 100 m2/g, for improving the characteristics of the moulding sand and/or for reducing the emission of harmful and/or odorous substances.
Claims17
Method for producing a molding sand, for foundry purposes, comprising
- adding a material that is not capable of swelling in water to a mixture of a granular substance and additives, and
- a porous material that is not capable of swelling has cavities having a specific surface area of more than 10 m2/g, and
- treating the porous material that is not capable of swelling chemically and/or physically in such a way that
- oxidants are built into its cavities.
1 more element
Dependencies are inferred from the claim text.