Process for the regeneration of used foundry sand

Details Process for the regeneration of used foundry sand Process for the regeneration of used foundry sand

B - Operations, Transporting

22

C

22/89

B22C 5/00 (2006.01)

Patent

CA 2046508

A process is disclosed for the regeneration of used foundry sand, whose original molding sand contained as molding material inorganic bonding agents such as bentonite (= "inorganic used sand") and/or organic bonding agents such as phenolic and/or furan resins (= "organic used sand"). The used sand to-be-cleaned is soaked with water and subsequently moved into a heated fluidizing bed in its wet condition.

rocédé de regénération de sable de fonderie usagé. Le sable de moulage original renferme, en tant que matière à mouler, des liants inorganiques comme de la bentonie (= 'sable usagé inorganique'') et/ou des liants organiques comme de la résine phénolique et/ou de la résine furanique (= 'sable usagé organique''). Le sable usagé qu'il faut nettoyer est imbibé d'eau puis il est amené, à l'état humide, sur un lit fluidisé pour traitement thermique.

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