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Using A Trommel For Placer Processing

The 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.

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All About Chalcopyrite


…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.

Practical Advice for Milling Hard Rock Ores


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.

Gold Prospecting for Better or Worse: Respect the Angle of Repose


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.

Ancestral Yuba River Placer Gold Deposits


The small-scale miner has reasonable opportunity to exploit some of these small, rich placer gold deposits. 

Pickers and Nuggets


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.

Ask The Experts - What is oxide gold?


Red Lake, Ontario


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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