The company is leaching copper from the under-ground ore bodies which previously were mined principally by block-caving methods. Various amounts of copper remain in the capping, in the stopes below the capping, and in the crushed pillars in the mine. A description of the inplace leaching operation at the Miami mine is given by Fletcher.
453 Acid leaching of oxide–sulfide copper ore prior the flotation – A way for an increased metal recovery Miroslav D. Sokić1, Vladan D. Milošević1, Velizar D. Stanković2, Vladislav Lj.Matković1, Branislav R. Marković1 1Institute for Technology of Nuclear and Other Mineral Raw Materials, Belgrade, Serbia 2University of Belgrade, Technical Faculty, Bor, Serbia
Copper Leaching Equipment. Concrete as a material for construction of vats, launders, etc., in leaching works has found application a number of times, but nothing is on record as to its durability under working conditions. As the cement binder is alkaline in its nature, and as leaching solutions are of varying acidity, it is to be expected that ...
Recently, the trend to recover copper directly from ores through leaching processes has been on the increase (see section on Refined Copper Production). Primary smelters use mine concentrates as their main source of feed (although some use copper scrap as well). Secondary copper smelters use copper scrap (mainly low grade) as their feed
H4 Project - Pakistan - Tethyan Copper - Review of metallurgical testwork and development program for Tanjeel Heap Leach-SX-EW Project (2005-06) Audit of BioHeap process technology for Heap Bio-Leaching of chalcopyrite, nickel sulphide and other sulphide ores - …
12%Feasibility for bacterial leaching of two different copper ores from Pakistan was investigated with locally isolated, acidophilic thiobacilli in shake flask culture at 28±2°C. After a lag period of 16 d,Thiobacillus thiooxidans solubilized up to 19% of copper present in chalcopyrite ore in 14 d before entering stationary phase. In oxidized copper ore amended with chalcopyrite ore and ...
Copper: Natural, Recyclable and Essential. Of all the materials used by man, copper has had the most profound effect on civilization. From the dawn of civilization and into the third millenium, copper has played, and continues to play a vital role in contributing to, sustaining and improving society.
compatible with the copper leaching process because it did not extract copper below pH~36. Technically this problem could be solved by neutralizing the acid leach liquor or by leaching oxide copper with ammonia, but neither solution was economical. a molecule that extracted copper well from typical dump leach liquors (pH ~1.8) had to be built. The
The leaching of lead and copper from plumbing materials is a source of metals in drinking water and is a public health concern. This work investigated the influence of free chlorine (HOCl/OCl-) on the level of copper in water in contact with the solid metal, and proposed an oxidation-dissolution mechanism to explain copper leaching.Experimental results are presented for the leaching of copper ...
copper oxides have been in common use for some time. Prior to the development of the Sherritt-Gordon process for nickel and cobalt in which copper is recovered as high grade copper sulfide, copper sulfides were economically recovered in a hydrometallurgical process only during the leaching of waste dumps. . Need for Hydrometallurgical Processes
The Copper Chloride Leaching Process consists of the following main steps: Concentrate repulp. Atmospheric chloride leaching. Leaching residue thickening, filtration, wash, and stabilization. Copper solvent extraction (conversion from chloride to sulfate) Silver recovery from raffinate. Copper …
The leaching experiments were performed using sulphuric acid solutions, whereby the kinetics of copper leaching was investigated with respect to acid concentration and solid to liquid ratio. The copper concentration in the leach solution ranged from 0.80 to 1.75 g dm-3. The total Cu recovery rate ranged from 30 to 56 %, whereas the
The copper leaching rates (LR) were studied in artificial freshwater, brackish water and seawater as well as in tap and natural surface water. The artificial freshwater was prepared by adding 168 mg/L sodium hydrogen carbonate (Carl Roth, Karlsruhe, Germany) to milli-Q®-water and the artificial brackish water and seawater by adding 5 and 35 g ...
leaching of copper-bearing ores in the U.S The dissolved copper recovered by this operation was derived from the natural oxidation and leaching of sulfide mineralization in a major porphyry copper deposit located in the headwaters of Bingham Creek. This is the present site of the large-scale, open pit operation at Bingham Canyon, which
SummaryFeasibility for bacterial leaching of two different copper ores from Pakistan was investigated with locally isolated, acidophilic thiobacilli in shake flask culture at 28 + 2~ After a lag period of 16 d, Thiobacillus thiooxidans solubilized up to 19% of copper present in chalcopyrite ore in 14 d before entering stationary phase.
Feasibility for bacterial leaching of two different copper ores from Pakistan was investigated with locally isolated, acidophilic thiobacilli in shake flask culture at 28±2°C. After a lag period of 16 d,Thiobacillus thiooxidans solubilized up to 19% of copper present in chalcopyrite ore in 14 d before entering stationary phase. In oxidized copper ore amended with chalcopyrite ore and ...