heap leaching


Also found in: Wikipedia.

heap leaching

[′hēp ‚lēch·iŋ]
(metallurgy)
A process used for the recovery of copper from weathered ore and material from mine dumps; material is laid to a thickness of 20 feet (6 meters) in alternately fine and coarse beds and treated with water at intervals during which oxidation occurs; liquor that runs off is treated with scrap iron to precipitate copper.
Mentioned in ?
References in periodicals archive ?
Mining a series of staged open pits with treatment at the Greenfields Mill, working with Norton Gold Fields on the license to mine for the Castle Hill Stage 1 development and unlocking the value of mined lower grade ore using heap leaching technology.
Heap leaching is usually used to extract uranium from low grade ore of which the uranium content is too low to be economically processed in a uranium mill.
The addition of a heap leaching circuit to the Murchison gold project will increase the annual gold production.
This program is designed to evaluate the bulk-tonnage, low cost heap leaching potential of the Santa Ana silver deposit using lower cut-off grades, as well as expanding the higher-grade intercepts, which remain open along the limits of the anomaly.
There have been some notable green victories: Montana has banned the use of cyanide heap leaching (effectively killing the industry there), California has introduced prohibitively strict water-use rules, and activists in Washington recently blocked the proposed Crown Jewel mine.
Cyanide, he says, has allowed heap leaching, and heap leaching lets mines profitably work deposits that otherwise would stay in the ground.
What you'll see: open pits, mills, heap leaching, maybe a mine shaft
Annual production is estimated at 70 million pounds of copper cathode over 12 years, using open-pit mining, heap leaching of copper ore at run-of-mine size, solvent extraction and electrowinning.
With positive results from the 10,000 ton heap leaching program the Company would increase the tonnage to a much larger heap leach.
has been engaged to oversee and co-ordinate a select team of engineers who will conduct Engineering studies to evaluate options for a copper heap leaching operation at Canariaco, Northern Peru.
At current gold prices, heap leaching at Gross Rosebel demonstrates robust economics, plus the scope to cope with further reductions in the prevailing gold price.
He has held key positions in four separate mine construction projects in two countries, including three start-ups, two of which were world-class size heap leaching operations.