Method for removing organic deposits from sand particles with laser beam

摘要

A method and system for removing organic deposits from the surface of sand particles. The organic deposits include molding compound and carbonaceous materials which are deposited on sand particles during their use in foundry operations. The organic deposits are exposed to a laser beam having a wavelength which is selectively absorbed by at least a portion of the organic deposits, while being essentially transmitted by the sand particles. The organic deposits are selectively heated by the laser beam resulting in vaporization and/or decomposition of the deposits without significant heating of the underlying sand particles.