foerfarande foer regenereringsbehandling of oevervaegande lerbunden gjuteriretursand

摘要

A method for regenerating foundry old sand which method combines impact and shearing stress of the sand grains which occurs with simultaneous dust removal. The dust removed by suction contains non-burned bentonite and carbon parts which can be re-used in the same way as the regenerated material of core sand. Environmental pollution and quantities for dumping are drastically reduced.