The Basics of Crushing and Milling Operations
February 2011 by Chris RalphIn processing gold, silver and other valuable ores, the minerals containing the values, such as metallic gold, silver-bearing sulfides or other minerals, must be freed from the surrounding host rock before those valuable minerals can be captured
Some claim they can smell gold. This may be, but when I take a whiff of gold, I smell dirt, rotten eggs, garlic or just nothing: my nose is everything but sensitive.
Working underwater certainly has its challenges, but since I wanted to learn how to blast underwater, I just needed to dive in headfirst and take charge of the operation.
The solution focused on the relative difference in malleability between gold and waste, rather than the difference in density exploited by gravity circuits.
Imagine you have located a source of virgin placer ore containing immense gold value. Now imagine that there is a 10-ton monolith of extremely hard gneiss in between you and payday.
They worked their plan, bit by bit, and sure enough, after the blast, gold was detected… Over two pounds of beautiful crystalline gold was recovered in that stretch!
Old mine workings and tailing piles can represent opportunities on many levels, from the chance to simply find a nugget on up to the commercial reworking of the old tailings for profit.
George was considering filling his dredge floats with closed-cell foam, ensuring that there would be no area available within each float for flooding.
The Bawl Mill • Our Readers Say • Ask The Experts—What minerals are magnetic? Can rare earth magnets capture platinum? • Ask The Experts—Jet nozzle or suction nozzle? Which is best for my highbanker? • Ask The Experts—Precious metals in water? • Rediscovering Placerville, California • Eastern Arizona: Gold and Base Metal Deposits—Part I • Over The Divide—Daryl J. Nelson • Legislative and Regulatory Update • Cyanide-Free Gold Separation • Mining Stock Quotes & Mineral and Metal Prices • Melman on Gold & Silver