How To
Company Notes
August 1999 by Staff
• Homestake Mining Company• Placer Dome Inc.
• AZCO Mining Inc.
• Guyana Diamond Corp.
• Canadian Mining Company, Ltd.
• Hecla Mining Company
• Pan American Silver Corp.
How to Refine Silver—Pt II
Silver recovery from low-level solutions is frequently done in a cell that has a cathode with 2 to 5 or more times the surface area as the anode.
Exploring Placers with Auger Drills
Augers can be used effectively for placer exploration with certain limitations.
Hard Rock Milling: A Matter of Scale
Most prospectors understand placer mining a lot better than hard rock mining and don’t realize the amount of work that goes into processing different types of hard rock ore.
Breaking Rock the Old School Way
Prospectors have many reasons why they might want to break rocks. These include dividing up a specimen too large to carry.
Determining the Amount of Gold in Rich Ores
This is just the type of specimen that could have been easily ignored by the old-time miners. It felt a little heavier in my hand than a chunk of quartz of that size ought to have been.
Dredging Tips and Tricks: T-80 Air Compressor Maintenance
The next morning, I retrieved the compressor and again attacked the sticky head bolt. As if by magic (and some applied physics) the head bolt sighed and finally broke loose.
How to Melt Your Own Gold
There are good and bad ways to melt gold. In this article, we’ll take a look at the right way to melt gold without losing any of the valuable metal.
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• Looking Back
• 1999 National Mining Hall of Fame Inductees
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