sluice box

sluice box

[′slüs ‚bäks]
(mining engineering)
A long, inclined trough or launder with riffles in the bottom that provide a lodging place for heavy minerals in ore concentration.
References in periodicals archive ?
Think of it as mining for gold, business data is piles of paydirt that is yet to be processed, and law firm's or the sluice box that sift through the business data and pulls out the gold nuggets.
That means you might uncover everything from a traditional gold-panning sluice box and miniature souffle dishes to the latest toaster models.
This test facility is meant to model their process plant operating in Idaho City which is effectively a giant sluice box that washes away lighter crushed rock from the gold particles.
James Prudden, Constitution Mining's Chief Geological Consultant commented, "The Gold Sands district is formed by meandering rivers that flow from the mouth of the Manseriche Gorge, which acts as a giant natural sluice box.
This washing separates the gravel from the dirt with the large rocks running off a shaker screen on one end of the plant and the small material and gold dropping through the screen to the sluice box below.
Brittan says it's taken him and his partner years to perfect the system they use, which involves sucking up sediment, then dumping it into a sluice box that washes the grit and helps separate the gold.
The book, available in New Zealand and published by Halcyon Press, covers digging, panning and sluice box methods, as well as use of metal detectors, and what to do with your gold when you have found it.
Another device used was the sluice box, which had been developed years before by Brazilian miners.
The authors investigated the possibilities of recovering 40 micron heavy mineral particles in a sluice box using a contact coating on the bottom of the box which was formed by a magnetic mineral fraction, the result of an external magnetic field.