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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...
And the Survey Says...
March 2013
A recent online survey on our homepage confirmed what we expected...
A recent online survey on our homepage confirmed what we expected...
Ask The Experts - Seeking advice on setting up an operation and the agreement with the landowner
November 2019
Quick Thinking & Rescue Devices Save Two Lives
June 2000
MSHA (Mine Safety and Health Administration) reports that a pair of miners used oxygen-supplying self-rescue devices to save two of their co-workers who were in danger of suffocation at the Ohio Valley Coal Company's Powhatan No.6 mine near St. Clairsville, Ohio.
MSHA (Mine Safety and Health Administration) reports that a pair of miners used oxygen-supplying self-rescue devices to save two of their co-workers who were in danger of suffocation at the Ohio Valley Coal Company's Powhatan No.6 mine near St. Clairsville, Ohio.
Lode Gold in Honduras
September 2005
Honduras, about the size of Ohio, is one of the “banana republics” in Central America. The central part of the nation is mountainous, with peaks reaching 9,000 feet.
Honduras, about the size of Ohio, is one of the “banana republics” in Central America. The central part of the nation is mountainous, with peaks reaching 9,000 feet.
East Coast Dredger Heads West - Part II
February 2009
I wandered back across the river, wading through the rapids and slipping at least three more times. I couldn’t believe how slick these rocks were! Once on the other side, I sat down for a few moments to review my plan of attack and lick my wounds.
I wandered back across the river, wading through the rapids and slipping at least three more times. I couldn’t believe how slick these rocks were! Once on the other side, I sat down for a few moments to review my plan of attack and lick my wounds.
Gold in the Drum Mountains
September 1999
The Drum Mountains are located 23 to 30 airline miles northwest of Delta (pop. 2,000), in west-central Utah. The desert mountains rise to 7,233 feet and receive only 8 inches of precipitation a year.
The Drum Mountains are located 23 to 30 airline miles northwest of Delta (pop. 2,000), in west-central Utah. The desert mountains rise to 7,233 feet and receive only 8 inches of precipitation a year.
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