Leaching Solution - an overview | ScienceDirect …
In the Miami Mine in Arizona, copper was extracted from residual lean ores after completing mining in 1954. The leaching solution penetrated 3–4 days into the ore and was collected in a central sump from where it was pumped to the surface. Copper was produced from the solution …
Acid Leaching - Copper Ore Treatment Method
COPPER LEACHING. The application of hydrometallurgical leaching to oxide and combined oxide and sulfide ores depends mainly on obtaining solvent at low cost and in holding initial plant costs within feasible limits. Dilute sulfuric acid-ferric sulfate has been found to be an excellent solvent for oxide minerals as well as for such sulfide forms as chalcocite and covelite but not chalcopyrite.
Leaching of Copper Sulphides - SAIMM
Three copper sulphide leaching processes are discussed in the sections that follow. Total pressure oxidation (POX) and ferric sulphate leaching are carried out in environments that are sulphate-based while copper chloride leaching takes place in a chloride-based solution environment.
SEPARATION OF COPPER FROM A LEACHING …
Silvas et al. (2015) investigated copper leaching with sulfuric acid + hydrogen peroxide and 1:10 solid/liquid ratio at 75ºC over 4h. After two successive leaching stages, 100% of the copper in comminuted PCBs was leached. The separation of metals contained in a liquor from acid leaching can be achieved by a solvent extraction technique.
(PDF) Leaching of copper oxide with different acid …
It was found that 99.95% of copper was dissolved after 14min with inorganic acids at 0.5M, 25°C and l/s=10ml/g while more drastic operation conditions were needed to reach the same dissolution...
COPPER(II) EXTRACTION FROM AMMONIA LEACH SOLUTION
Abstract: Hydrometallurgical processing of copper-bearing materials (ores, concentrates, by-products) is usually done with the use of acidic or ammonia leaching. In the case where a leaching feed material contains significant amounts of carbonate rocks and iron minerals the second method is preferential due to a higher process selectivity.
The selective leaching of copper from a gold–copper ...
Copper selective leaching will reduce the gold losses due to a cementa- tion mechanism of gold in the presence of metallic copper as all of the metallic copper will dissolve in the pre-leaching stage.
Heap leaching - Wikipedia
Heap leaching is an industrial mining process used to extract precious metals, copper, uranium, and other compounds from oreusing a series of stone reactions that absorb specific minerals and re-separate them after their division from other earth materials. Similar to in situ mining, heap leach mining differs in that it places ore on a liner, then adds the chemicals via drip systems to the ore, whereas in situ mining lacks these liners and pulls pregnant solution up to obtain the minerals. Heap leaching is widely used i…
Leaching of gold and copper minerals in cyanide …
The concept of leaching copper–gold ores using leach solutions which contain Cu (CN) 32− was investigated. Gold leaching occurs in air saturated Cu (CN) 32− solutions at a much slower rate than in free cyanide solutions. A similar gold leach rate is observed when copper is alloyed with the gold.
(PDF) Ammonia Leaching: A New Approach of …
The main advantages of ammonia leaching of copper-and zinc-containing sources are as follows: (i) raw material with high carbonation can be leached by ammonia solutions; acidic leaching can not be...
Leaching in Metallurgy and Metal Recovery
Leaching, by definition, is the process of extracting a substance from a solid material, after it has been in contact with a liquid. The substance being extracted from the solid does so by coming into solution, one which it is soluble in.
SEPARATION OF COPPER FROM A LEACHING SOLUTION OF …
Silvas et al. (2015) investigated copper leaching with sulfuric acid + hydrogen peroxide and 1:10 solid/liquid ratio at 75ºC over 4h. After two successive leaching stages, 100% of the copper in comminuted PCBs was leached. The separation of metals contained in a liquor from acid leaching can be achieved by a solvent extraction technique.
Minerals | Free Full-Text | Leaching of Primary …
The sulfuric acid leaching enables the dissolution of soluble copper oxides. The copper contained in the secondary sulfides and bornite was dissolved using a cyanide solution (CNsCu). Residual copper (Cu r) corresponds to the copper present in the chalcopyrite.
Improvements in Copper heap leaching by use of wetting agents
Improvements in Copper heap leaching by use of wetting agents Proceedings of EMC 2009 3 A sprinkler system is installed on top of each heap allowing the diluted sulfuric acid to be fed uni- formly over the ore. While the solution percolates through the heap, copper is leached out of the ore. The pregnant leaching solution is collected by a drainage system below the heap and is led through a ...
The Case for Glycine Heap Leaching
Copper/gold ores can be effectively leached by a combined glycine/cyanide solution. Cyanide consumption is a fraction of that required by conventional cyanidation. The resulting solution has much lower WAD cyanide and the cost of detox can be greatly reduced or eliminated.
Copper - BASF
At the core of BASFs solvent extraction offering is an extensive range of LIX ® oxime extractants that are widely used in the purification of copper leach solutions. Oxime formulations can be tailored to meet individual customer requirements and are suitable for a wide range of leach solutions.