Process for regenerating used foundry sand

Details Process for regenerating used foundry sand Process for regenerating used foundry sand

1992-10-27

1994-01-18

Drodge, Joseph W.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

110236, 164 5, 210773, 241 17, 241DIG10, 432 15, 432 58, B01D 1100, B22C 100

Patent

active

052797414

ABSTRACT:
The invention relates to a process for regenerating used foundry sand, whose original molding sand contained, as the molding material, inorganic binders such as, for example and especially, bentonite ("inorganic used sand") and/or organic binders such as, for example and especially, phenolic resins and/or furan resins ("organic used sand"), wherein the used sand to be reconditioned is impregnated with water and then transferred in the moist state into a heated fluidized bed.

REFERENCES:
patent: 4008856 (1977-02-01), Sears
patent: 4508277 (1985-04-01), Andrews
patent: 4636168 (1987-01-01), Sandstrom et al.
patent: 4685973 (1987-08-01), Ashton
patent: 4700766 (1987-10-01), Godderidge
patent: 4960162 (1990-10-01), Millager

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