Device for regenerating used inorganic foundry sand made from molded materials containing sand and inorganic binder comprises a breaking unit, a heat treatment stage, a post-treatment stage, pressure conveying units and a dust-removing unit

摘要

Device for regenerating used inorganic foundry sand made from molded materials containing sand and inorganic binder comprises a breaking unit (2) for crushing the used sand core, a heat treatment stage (5) for removing residual moisture from the sand and embrittling the binder adhering to the sand core, a post-treatment stage (9) with baffles (9') for removing the and core and the embrittled binder, pressure conveying units for maintaining a permanently fluidized state of the used sand in the regenerating device and a unit (8) for a dust-removing unit in the operation of the regenerating device.