Foundry sand regenerating process and device

Details Foundry sand regenerating process and device Foundry sand regenerating process and device

B - Operations, Transporting

22

C

B22C 5/02 (2006.01) B22C 5/10 (2006.01)

Patent

CA 2117787

(57) Abstract A regeneration process for foundry sand, in particular active bentonite- containing used sand, dispenses with preliminary thermal treatments and al- lows most valuable substances contained in the used sand to be recovered. The sand is partially fluidized with air in a grinder, by means of which valuable sub- stances and dust are continuously carried out and separately collected. The con-siderably increased grinding and dedusting performance requirements caused by the suppression of preliminary thermal treatments are met by a composite system of separate grinding and dedusting areas through which the sand contin- uously circulates in a vertical circuit.

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