Apparatus for removing no-bake coatings from foundry sand,...

Details Apparatus for removing no-bake coatings from foundry sand,... Apparatus for removing no-bake coatings from foundry sand,...

B - Operations, Transporting

22

C

20/89

B22C 5/00 (2006.01)

Patent

CA 1126474

AN APPARATUS FOR REMOVING NO-BAKE COATINGS FROM FOUNDRY SAND, AND CLASSIFYING THE RECLAIMED SAND ABSTRACT OF THE DISCLOSURE An apparatus for reclaiming no-bake foundry sand is provided, in which a fluidized stream of pneumatically conveyed particles of no-bake coated sand grains traveling at velocity sufficient for transport is discharged against a target to fracture the no-bake rigid coatings from the sand grains on impact. Certain of the fractured coatings are removed and the sand grains along with any remaining fractured coating particles are directed through a passageway having a fluidizing air stream induced therein. The air stream entrains and carries off the fractured coatings and fine sand grains so that only sand grains of desired particle size pass through the air stream for subsequent reuse. Advantageously, the velocity of the air stream is controlled by regulating the cross-sectional area of the passageway at the point at which the air stream is induced.

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