Patent ID: 8138437
Filing Date: 2012-03-20
Classification: B03B,B03C,B07C,C22B,Y02P,Y02W,Y10S

Abstract:
1. A system for recovering metal material from a waste material stream comprising the steps of: means for processing the waste material stream, where the means for processing measures the rate of change of a current generated as a result of a metallic object moving past the means for processing and generates an indication that the means for processing senses the metallic objects in the waste material stream based on the measured rate of change of the current; means for separating, in response to the indication that the means for processing senses the metallic objects in the waste material stream, a metallic fraction of the waste material stream, the metallic fraction comprising the metallic objects identified by the means for processing; and an air separator for further separating the metallic fraction of the waste stream to concentrate the metal content of the metallic fraction of the waste stream in a heavy fraction.