Patent ID: 7909169
Filing Date: 2011-03-22
Classification: B03B,B07C

Abstract:
1. A method of mining alluvial gold deposits, comprising: collecting feed from alluvium; washing the feed at high pressure; separating the feed into a plurality of separate fractions, each fraction containing solids having a different range of diameters from the solids of at least one other fraction; passing at least one of the fractions over a sensor for detecting gold, wherein when gold is detected in a piece of the fraction, an air blast is targeted and delivered at the piece; and wherein at least one of the fractions contains gold that is detected on a conveyer using a metal detector, and wherein after the gold in the at least one of the fractions is detected, a feed chute positioned proximate an end of the conveyer is redirected to guide gold from the conveyer to a receiving container.