Industrial Heap Bioleaching of Copper Sulfide Ore Started …
Sulfuric acid solution containing ferric iron is the extractant for industrial heap bioleaching of copper sulfides. To start a heap bioleaching plant, sulfuric acid is usually added to the irrigation solution to maintain adequate acidity (pH 1.0–2.0) for copper dissolution. An industrial practice of heap bioleaching of secondary copper sulfide ore …
Leaching of Oxide Copper Ores by Addition of Weak Acid …
In this study, weak acid in the curing and leaching stages of copper ore was incorporated, and we analyzed its effect on the dissolution of copper and final impurities. The weak acid corresponds to a wastewater effluent from sulfuric acid plants produced in the gas treatment of copper smelting processes. This effluent is basically water with high acidity …
In situ leaching of copper: Challenges and future …
In situ leaching offers a potentially attractive way to extract copper from the subsurface without costly fragmentation and processing. Applicability of in situ leaching …
Sulfuric acid leaching for capturing value from copper rich …
The dominating copper phases in the slag are Cu, Cu 2 O and CuFeO 2 (XRD and SEM-EDS). Leaching copper from these phases using sulfuric acid has a fast dissolution kinetics. Smaller particle size, higher temperature (up to 40 °C) and increasing mixing power (up to 0.26 kW/m 3) enhance the leaching kinetics.
Enhanced leaching of copper from refractory oxidized copper ore …
Leaching tests indicated that when the dosage of CaF 2 reached 5 wt% of raw ore mass, the sulfuric acid dosage was 120 kg/t, the leaching temperature was 60°C, and the leaching time was 200 min with a slurry concentration of 40 wt%, the copper leaching rate reached 80.44%, exhibiting an improvement of 8.76% compared with the …
Kinetic Investigation on Leaching of Copper from a Low-Grade Copper
For instance, Liu et al. found that the leaching kinetics of a low-grade complex copper ore in ammonia-ammonium chloride solution followed the diffusion process with the activation energy of 23.279 kJ/mol. Seo et al. reported that the leaching kinetics of a Cu-Co ore in the sulfuric acid and hydrogen peroxide system followed the shrinking …
Copper Mineral Leaching Mathematical Models—A …
Leaching processes can be defined as the selective removal and/or extraction of metallic values from a mineral, causing a suitable solvent of the leaching …
LEACHING OF A ROASTED COPPER SULFIDE ORE
The leaching of copper maximum in a sample was in the order of leaching of copper in three ores is as Sample C>sample D>Waziristan chalcopyrite. The experiments showed that the untreated raw oxidized copper ore show significant leaching which is 9.5% for saline and 35.5% for fertile soils respectively.
(PDF) Copper heap leaching: Process, principles and …
Heap leaching generates a pregnant leach solution (PLS) containing 1–6 g/L Cu²⁺, which is sent to solvent extraction and electrowinning for copper production.
Copper Leaching Method
When leaching with sulphuric acid lixiviants, and if the ore contains no sulphides or sulphates, the acid cost may constitute a preponderating proportion of the expense, and a source of cheap acid becomes a vital factor. ... Extraction of copper from suitable ore by leaching methods is generally assumed to cost less than the combined …
Improvement of Copper Metal Leaching in …
A new concept for copper (Cu) metal leaching by the simultaneous use of cupric ions (Cu 2+) and oxygen (O 2) was proposed to improve Cu metal leaching in sulfuric acid.According to this concept, …
Leaching of a pyrite-based ore containing copper using sulfuric acid
Here, the leaching of a sulfide ore (32% Fe, 2% Cu) is investigated using a mixture of sulfuric acid and hydrogen peroxide (0.15 M H2SO4 and 0.5 M H2O2), in proportions forming a slurry 10% w/w ...
Economic Assessment of an In Situ Leaching Operation with Ore …
Application of ISR to copper extraction has been, until now, restricted to acid leaching of oxidized copper ore bodies, which are naturally fractured and have good permeability due to geological weathering processes [6,7,8]. However, most remaining copper ores are located within more consolidated low permeability rocks, which prevents …
Leaching of Oxide Copper Ores by Addition of Weak …
Leaching of Oxide Copper Ores by Addition of Weak Acid from Copper Smelters. by. Giselle Araya. 1, Norman Toro. 2,3,*, Jonathan Castillo. 1, Danny Guzmán. 1, Alexis Guzmán. 1, Pía Hernández. 4, Ricardo I. …
Copper Acid Leaching Plant
1) The copper oxide ore is screened after two-stage crushing, the material on the screen is sent to the storage yard for conventional acid heap leaching, and the material under the screen enters the thickener; 2) The underflow of the thickener enters the granulator after adding binder for slurry mixing and granulation with acid resistant gravel ...
Study of Factors Affecting the Copper Ore Leaching Process …
The percolation leaching process results, including the calculation of sulfuric acid consumption per ton of ore, the consumption ratio of sulfuric acid and extracted copper, and the final copper recovery from the ore, are presented in Table 3, Table 4, Table 5, Table 6 and Table 7, which show the dynamics of these parameters over a …
Study of Factors Affecting the Copper Ore Leaching …
The biotechnological copper leaching process involves the irrigation of ore materials or technogenic waste-containing metal sulfides using sulfuric acid solutions and iron salts, as well as the …
Kinetic Investigation on Leaching of Copper from a …
Asghar Azizi. 646 Accesses. 6 Citations. Explore all metrics. Abstract. In this study, the reject fraction of the jaw crusher, located in the first part of the crushing circuit, …
(PDF) Investigation of Affecting Parameters on Heap Leaching …
Leaching of copper from a Jordanian copper ore has been studied using a stirred batch reactor with hydrochloric acid as the main lixiviant, under the following conditions: temperature 25 – 45 oC ...
Copper Heap Leaching | Encyclopedia MDPI
Heap leaching is a firm extractive metallurgical technology facilitating the economical processing of different kinds of low-grade ores that are otherwise not exploited. hydrometallurgy leaching gangues clays minerals heap leaching agglomeration. 1. Introduction. According to Toro et al. [ 1], copper mining is an industry that is in constant ...
(PDF) Leaching of Oxide Copper Ores by Addition of Weak Acid …
XRD pattern of leaching residues (a) with weak acid and (b) without weak acid, and of (c) copper ore. SEM-BSE image for leaching residues (×1000) and the SEM-EDS for the particle in the red ...
The Leaching of Dolomitic-Copper Ore Using Sulphuric Acid …
The leaching of dolomitic-copper ore using sulphuric acid under controlled conditions was studied with a view to evaluating the economic value and the effect of ore pulverisation, particle size, temperature and pH on the recovery of copper from chalcopyrite. The samples were ground and mixed with water and sulphuric acid to form …
Comparing the extent of the dissolution of copper-cobalt …
All these methods have inherent problems. For instance, heap leaching often has low rates of recovery, the inclusion of a flotation stage prior to leaching is costly, and direct ore leaching consumes large volumes of acid. The main cobalt-bearing mineral in the copper-cobalt oxide ore deposits of the DRC is heterogenite (CoO.2Co 2 O 3.6H 2 O).
Acid leaching of oxide-sulfide copper ore prior the …
Sokić et al. [7] performed acid leaching of copper from a copper oxide-sulphide ore excavated from the copper mine Cerovo, a part of the RTB Bor. These authors reported the leaching degree of ...
LixTRA™ – Novel Copper Leach Technology
Heap leaching copper from oxide and secondary sulfide ores has been practiced commercially since the late 1960's. This methodology is mostly used for low-grade ores and involves the following basic processing steps: Mining, Crushing, Leaching, Solvent Extraction (SX) and Electrowinning (EW). Depending on ore characteristics other …
(PDF) BIOLEACHING OF COPPER ORES AND …
Hydrometallurgical extraction accounts for about 20% of total primary copper production. Most of this is produced by heap leaching. Heap leaching consists of trickling H2SO4-containing lixiviant ...
Copper Mineral Leaching Mathematical Models—A Review
About 85% of malachite dissolution (the copper oxide studied) occurred in stage 1, while 15% occurred in stage 2. In addition to the study of malachite leaching, Yaras and Arslanoglu investigate the copper leaching kinetics of malachite ore using formic acid as an organic leaching reagent. The kinetic model was used to indicate the …
Enhancement of copper recovery by acid leaching of high-mud copper
In this study, to improve the copper extraction rate, enhance acid leaching process and get rid of dilemmas in leaching plant of Yangla Copper Mine, an evaluation of challenges and mitigation strategies, which include antiscalant addition, ore washing, size classification, moderated heap height, and chemical mechanical activation, for acid ...
How copper dump leaching works
In copper dump leaching, run-of-mine ore is irrigated with acidic leaching solution to generate aqueous cupric ions for further processing. The very large size of …
A STUDY OF LEACHING OF COPPER OXIDE ORE BY SULPHURIC ACID …
A required amount of 75 g/L. sulphuric acid solution was used and 5 g of the ground copper oxide ore with a solid to liquid. ratio of 13%. Leaching parameters such as leaching time from 0.25 – 4 ...