Patent ID: 8439284
Filing Date: 2013-05-14
Classification: B08B,B22C

Abstract:
1. A separation system for a waste foundry sand binder using ultrasonic waves, the system comprising: an ultrasonic surface treatment apparatus, which comprises a grinding rod rotatably mounted therein to mix waste foundry sand and water and an ultrasonic device mounted therein to apply ultrasonic waves to the mixture of waste foundry sand and water so as to generate air bubbles on the critical surface between the waste foundry sand and a binder and in one or more gaps of the binder, thereby causing separation of the binder from the waste foundry sand and one or more cracks in the binder by impact energy generated when the air bubbles collapse; a dehumidifying dryer, which dehumidifies the mixture of waste foundry sand and water discharged from the ultrasonic surface treatment apparatus and dries the waste foundry sand by supplying air heated by an electric heater mounted in an air blower to the waste foundry sand using the air blower; and a binder grinding apparatus, which comprises a grinding rod rotatably mounted therein to remove the binder remaining on the dried waste foundry sand by grinding.