Using A Trommel For Placer Processing
April 2010 by Chris RalphThe behavior of a trommel is dependent on how it is designed and set up. Important design characteristics include feed rates, screen perforation sizes, cylinder size, rotation speed and incline.
…there are loads of different copper minerals, but a large number of them form first in the ground as chalcopyrite and then through the effects of weathering are changed into other minerals like malachite, cuprite and chrysocolla.
The problem is that extracting gold from hard rock is often a lot more difficult than processing placer gravels. Still, there is some very high-grade ore out there in many old mining areas.
If you have done any hiking in rough terrain you are well aware that going down a slope is much more difficult and dangerous than climbing it.
The small-scale miner has reasonable opportunity to exploit some of these small, rich placer gold deposits.
Mike and I each selected a side of the creek and started to work our way upstream. We both worked the water and sides of the creek, and better than half the gold found in this area is in the water.
The mining and logging community of Red Lake, Ontario, population 5,000, is about 450 miles, as the crow flies, north of Minneapolis, Minnesota.
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