Small Mining Operations
Gold Recovery with Centrifugal Bowls
July 2014 by Chris Ralph
Centrifugal bowls are very efficient, and with proper operation they can consistently achieve gold recoveries above 95% with gold of about 50 mesh size.
Prospector's Guide to Rock Breaking and Blasting
The holes were overloaded with explosives, but I didn’t know it. I was just a green mining engineer fresh out of school and told to watch as the experienced miners set the charge.
A Few Methods for Sampling Hardrock Deposits
With a little homework and a methodical approach to sampling, a prospector can determine if a deposit is worthy of more of an investment...
Cyanide-Free Gold Separation
Some ores—mostly those with a high free gold content—are very amenable to gravity concentration. Well oxidized ores containing coarse gold are usually best for non-cyanide processes. Ores with significant sulfide content may require the...
PLP and MMAC Update
Mining on the Comstock Lode
Even with the decades of mining and exploration, much of the Comstock is still underdeveloped and its potential not fully tapped.
Wealth Beyond Your Wildest Imagination
“Wealth beyond your wildest imagination.” Those were the words that were used to inform me of how much gold was in a paleo channel that exists beneath the present channel of the Similkameen River in the State of Washington; words that have echoed in my mind for the past sixteen years.
Advancements in Non-Toxic Gold and Silver Leaching
The non-toxic thiosulfate is actually the medical antidote given to people for cyanide poisoning. By accomplishing both neutralization and metals recovery, this process creates an economic and environmentally attractive process.
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The Bawl Mill
• A Return to Silver City, Idaho
• Ask the Experts
• Ask the Experts
• Ask the Experts
• Swing and a Miss
• Miners Fight Back Against Road Closures
• The Giant King Mine
• BLM Flexes Its Muscles in Quartzsite
• Over the Divide
• Romancing the Lens
• Mining on the Comstock Lode
• Want to Go to Australia?
• Melman on Gold & Silver
• Mining Stock Quotes and Mineral & Metal Prices
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Legislative and Regulatory Update
• Representative Manweller Lends a Hand in Washington State
