Process for the regeneration of used foundry sands

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

1991-05-10

1993-08-10

Bennet, Henry A.

Drying and gas or vapor contact with solids

Apparatus

With means to treat gas or vapor

34 20, 34 26, F26B 300

Patent

active

052337650

ABSTRACT:
Although an elevated process temperature is used for reprocessing used sands having high clay-like portions, the upper limit thereof is fixed such that chamottization of the sand and combustion of organic binder components do not occur. The air-gas mixture is circulated in a drier and a mechanical reprocessing step arranged downstream thereof and heated to process temperature by utilizing thermal energy obtained by branching off and burning part of the air-gas mixture from the circulation.

REFERENCES:
patent: 4415444 (1983-10-01), Guptail

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