B - Operations – Transporting – 03 – B
Patent
B - Operations, Transporting
03
B
209/154
B03B 5/00 (2006.01) B03B 5/66 (2006.01) B03B 7/00 (2006.01)
Patent
CA 1074263
ABSTRACT OF THE DISCLOSURE A sluice box is disclosed for use in high volume placer mining operations and a method of placer mining is disclosed,which are particularly useful for the recovery of gold from aggregate material. In operation, aggregate material is loaded into an inlet trough of the sluice box where it is mixed with water to form a slurry. A coarse recovery channel leads from the inlet trough and the sluice box is downwardly inclined, so that the slurry flows through the sluice box. The inlet trough has a punch plate bottom for separating the slurry into a coarse slurry stream which passes on into the coarse recovery channel, and a fine slurry stream which drops through the punch plate. A distribution section located below the punch plate has a generally conical and upwardly inclined floor, and angularly disposed vanes, so that the fine slurry stream is spread transversely and evened to produce a gener- ally uniform cross-sectional flow profile. The fine slurry stream then passes into fine recovery channels located beside the coarse recovery channel. Both the fine and coarse recovery channels have bottom coco mat layers and transverse riffles located thereon for agitating the fine and coarse slurry streams allowing the gold particles to settle and be trapped in the coco matting. The gold particles are trapped quickly without subsequent washing out, thus allowing high volumes of aggregate material to be processed through the sluice box producing higher recovery rates than in the past.
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