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, …

The result shows that the copper leaching efficiency increased with an increase of sulfuric acid concentration from 135 g·L-1 to 270 g·L-1. The copper leaching efficiency was close to using sulfuric acid concentration 270 g·L-1 at 18 h. However, too high acidity (405 g·L-1) hindered copper leaching within 14 h. The leaching …

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 ...

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 ...

The process requires the use of hydrochloric acid as leaching solution when treating copper ores, which may be produced in the plant itself. The operation is very simple, using sulphuric acid and NaCl as raw materials. Our experiences have been done with solutions containing 36 grs. of hydrochloric acid per liter of solution in order to have …

Leaching Process. ChemEngineering. 2023, 7, 54. https://doi/10.3390/ chemengineering7030054. Academic Editor: Akira Otsuki. Received: 13 March 2023. …

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 …

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 ...

The sulphuric acid leaching behaviour of copper oxide ore was applied in various kinetic models and interpreted graphically and assessed by the correlation coefficient (R 2) represented in Table 3. The highest value of correlation coefficient determines the fitting kinetic equation model that follows the dissolution of the element.

The analysis shows that bioleaching is suitable for the leaching copper from low-grade chalcopyrite and even original ore, but the leaching rate is not high, …

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 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 …

When processing copper through heap leaching, vast quantities of ore and ... Acids are introduced to copper-bearing ore, seeping through and dissolving copper and any other metals, including radionuclides. The liquid that "leaches" through the rocks is collected. This liquid contains the dissolved copper, known as a pregnant leach solution ...

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 …

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 ...

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, …

Meanwhile, the use of sulfuric acid as a lixiviant for leaching of copper ore has been reported in many studies due to its relatively low cost, and good leaching/solving ability at room ...

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.

The flowsheet discussed in this study is for treatment of 100 tons per day oxide-sulfide copper ore by the leaching process using sulfuric acid-ferric sulfate solvent. This flowsheet would also be suitable for a larger tonnage by proper sizing of the various units of equipment. ... The source of sulphuric acid for leaching is usually a major ...

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 …

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 …

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 …

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.

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 ...

Using computed tomography (CT) and MATLAB, the porosity of two-dimensional CT images in sample concentrations L1–L3 was observed to increase at least 4.5vol% after acid leaching. Ore ...

generated at a separate lab where Western Copper was also conducting testwork on the cyanide leaching of various samples. Acid Leaching of the Carmacks Sample Carmacks ore was received in a 20 L pail.

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 ...

Leaching of ore by dilute sulphuric acid compared to acid produced 0 10 20 30 40 50 60 biologically in the ore bed days We compared copper extraction from ore 1) by addition of sulphuric Fig. 1. Change in leach …

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 …

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.