heap leaching


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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.
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* 147 rock samples have been assayed with roughly one-third exhibiting grades suitable for heap leaching (>0.10 g/t) -- assays ranging from 0.1 g/t to 3.6 g/t gold; and 5 g/t to 669 g/t silver (see Table 1 and Figures 2, 3 and 4)
Multiple gold-silver processing options are being evaluated, including the low-cost heap leaching being reported on today.
Heap leaching works by drip-feeding acid through a large stockpile (or heap) of ore to leach out metals.
The restart of mining and heap leaching at Kisladag is a key part of our path forward.
This Pan project is a low cost, oxidized, Carlin-style gold deposit mineable by shallow open pit methods and treatable by heap leaching. A feasibility study was completed in November 2011.
The Tschudi mine is expected to set another record and will become the first mine in the country to adopt heap leaching to extract the copper from the ore.
The addition of a heap leaching circuit to the Murchison gold project will increase the annual gold production.
The sampling programme has been conducted to test potential for heap leaching the gold/silver mineralisation.
The Spence project would develop the copper ore deposit located in Chile's Region II, and includes an open pit mine, crushing, conveying, dynamic heap leaching, dump leaching, solvent extraction and electro winning facilities, according to Aker Kvaerner.
In 1979, Zortman-Landusky became one of the first gold mines in the world to start using "heap leaching" technology, which allowed mining companies to increase production.