Large Scale Mining
Silver Boom Prompts Idaho Mine Expansion
January 2011 by Associated Press
The Lucky Friday is already one of North America’s deepest hard-rock mines. Now, the 62-year-old mine is about to get much deeper.The Ely Copper-Gold District of Nevada
The main ore deposits of the Ely district are associated with an east-west belt of altered and mineralized rocks measuring about one mile wide that extends 8 miles westward from Ely.
A New Look at Old Mines
Exploration companies are actively looking for properties with profitable potential, even if the ground was once cast off as too low in grade to be economically viable. This is especially true in states that are reasonably friendly toward...
How to Refine Silver—Pt I
Silver refining has been used from ancient times to change the characteristics of the metal. Early metallurgists refined silver by heating it a couple hundred degrees above its melting point and holding the metal at an elevated temperature for a period of time.
Colorado Miner Sues EPA Over 2015 Spill
Hennis claims that months later and without his permission, the EPA built a $2.3 million water treatment facility on the property and the agency continues treating water and storing waste there.
New Silver and Zinc Mine Slated for Montana
Arizona-based International Silver Inc. is proposing an underground silver and zinc mine in Montana and has asked Butte-Silver Bow County to lease them the surface and mineral rights to hundreds of acres.
A Third Generation Small-Scale Hardrock Revival
One of his friends had 700 feet of small-gauge mine track and a hundred-year-old track bender laying out in his back 40; plus he also wanted to join the team. Perfect.
Designing and Evaluating Placer Gold Recovery Plants
For this article, I am focusing on industrial production plants that can handle 10 cubic yards per hour or more and would be fed by a loader or other heavy equipment...
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