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Small Mining Operations

Gold Recovery with Centrifugal Bowls

Centrifugal bowls are very efficient, and with proper operation they can consistently achieve gold recoveries above 95% with gold of about 50 mesh size.

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Selenium, Mercury and Suction Dredging—Studies Contradict CA State Water Resources Board


Federal and state regulatory agencies often cite mercury and methyl mercury in our waterways as a major factor for further restrictions on placer mining, and on suction gold dredge mining, in particular. However, these regulatory agencies are minimizing selenium and its neutralizing effects.

Understanding Rock Formations: Petrology for Prospectors


There are times when being able to recognize a type of rock can make you a much more successful prospector.

Heavy Glacial Rocks and Gold in the Midwest


Over the years, I've noticed a pattern in the type of rocks associated with the best gold deposits in Midwestern glacial gravel.

Mining Company Pays Millions for Gold Dug From Mine Dumps


Through a program that began in 2011, Barrick Gold Corp.-owned Golden Sunlight has paid out more than $45 million to small miners in the last seven years...

A Third Generation Small-Scale Hardrock Revival


One of his friends had 700 feet of small-gauge mine track and a hundred-year-old track bender laying out in his back 40; plus he also wanted to join the team. Perfect.

Resurrecting An Old Hard Rock Mine


There were nice sections of vein material at the end of several drifts, like they just stopped work one day and walked away.

Underground Mining: Getting the Ore Out


Choosing the right method to move your ore and waste is all about making the right choices. Sometimes more than one method may be used during the life of a mine as an operation expands and grows.

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