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Ask The Experts: How to remove precious metals from lead?
August 2010 by Thom Seal, PhD, PE
I have a large amount of precious metals, gold and silver, mixed in with lead. Cupelling is expensive. What method can I use to extract the gold and silver without cupelling?Additional articles that might interest you...
Why Do We Do The Things We Do?
September 2003
For years I had studied the tempting bench high above the East Fork of the San Gabriel River. A beautiful 20-foot vertical wall of encrusted boulders, cobbles and gravels beckoned to me 100 to 150 yards up a steep slope from the river bed. They were all very promising material. The kind of rounded curves that can charm so well, and tease a grown man into risking life and limb. So, on that nearly fatal day in May, I packed a spiral wheel...
For years I had studied the tempting bench high above the East Fork of the San Gabriel River. A beautiful 20-foot vertical wall of encrusted boulders, cobbles and gravels beckoned to me 100 to 150 yards up a steep slope from the river bed. They were all very promising material. The kind of rounded curves that can charm so well, and tease a grown man into risking life and limb. So, on that nearly fatal day in May, I packed a spiral wheel...
Precious Metals in the Patagonia Mountains
August 2003
The Patagonia Mountains are a small but rugged mountain range that adjoins the Mexican border some 9 to 16 miles east of the border town of Nogales. The range trends northerly for 14 miles and is about 10 miles wide, reaching an elevation...
The Patagonia Mountains are a small but rugged mountain range that adjoins the Mexican border some 9 to 16 miles east of the border town of Nogales. The range trends northerly for 14 miles and is about 10 miles wide, reaching an elevation...
Detecting in Australia's Pilbara Region
February 2007
Situated in northwest Western Australia, Australia’s Pilbara is one of the most isolated and scenic places on earth. The tiny town of Marble Bar, Australia’s hottest town, sits amongst the ancient ranges and is a Mecca for tourists—and gold...
Situated in northwest Western Australia, Australia’s Pilbara is one of the most isolated and scenic places on earth. The tiny town of Marble Bar, Australia’s hottest town, sits amongst the ancient ranges and is a Mecca for tourists—and gold...
Comstock Mining Gets Approval
February 2014
The approval, which affects 87 acres on the south end of Silver City, allows the company to move forward with exploration to determine the area's mining potential.
The approval, which affects 87 acres on the south end of Silver City, allows the company to move forward with exploration to determine the area's mining potential.
The Bawl Mill
March 2016
• Do as I say, not as I do...
• By the numbers...
• Do as I say, not as I do...
• By the numbers...
Time Well Spent
January 2012
Time is a commodity which if traded would dwarf the price of gold. Nobody has enough of it; we can’t make more of it; and whether squandered or spent wisely, once gone, it’s gone forever. To find gold we have to spend time.
Time is a commodity which if traded would dwarf the price of gold. Nobody has enough of it; we can’t make more of it; and whether squandered or spent wisely, once gone, it’s gone forever. To find gold we have to spend time.
Hawthorne's Golden Outlook
March 2009
It was not the scenery that attracted Vancouver-based Hawthorne Gold Corp. to the area, but rather the opportunity to gain control of projects with the ability to enter into production in the relatively near future...
It was not the scenery that attracted Vancouver-based Hawthorne Gold Corp. to the area, but rather the opportunity to gain control of projects with the ability to enter into production in the relatively near future...
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