Days of Leaching Copper Leached (%) Fig. 1b: Industrial Column Leaching – Secondary Sulfide Ore Leach time is 40% of control 24% more copper leached 28ppm LixTRA™ Control Days of Leaching 80 70 60 50 40 30 20 5 10 15 20 25 30 Copper Leached (%) Fig. 1a: Industrial Column Leaching – Oxide Ore Leach time is 70% of control 34% more …

Common copper leaching solutions include inorganic acids, ionic liquids, ammonia-based solutions, ethylenediaminetetraacetic acid (EDTA), and citrate.

Alena opens describing the heap leaching process for copper: Copper ore is excavated from the ground, crushed and then spread in uniform layers on a pad. A slow trickle of sulfuric acid is …

This article looks at the use of alternative water resources in copper leaching processes in the Chilean mining industry. The research was published in Metals. The remaining water (2.5%) largely (1.7%) corresponds to polar and glacier caps, which is why it is difficult to use. Traditional sources such as lakes, groundwater, and rivers …

Copper extraction versus leaching time without (0%) and with ultrasound assistance at three power amplitudes (leaching conditions: a 10% solid-to-liquid ratio (S/L), 0.5 M sulfuric acid ...

Abstract and Figures. This article presents a copper leaching process from chalcopyrite concentrates using a low-pressure reactor. The experiments were carried out in a 30 L batch reactor at an ...

An option to improve the leaching efficiency of chalcopyrite is pretreatment prior to leaching. Pretreatment variables, such as the curing time and the addition of chloride, can increase the kinetics of copper extraction, particularly for sulphide ores. However, there has been little research on the topic. The reactions that govern this …

To maximize the copper leaching recovery, using the Experimental Design software (DX7), the optimal values of operational parameters were obtained. Accordingly, the maximum copper leaching recovery of 97.52% was achieved under the optimal conditions: temperature = 50 °C, time = 4 h and 35 min, pulp density = 5%, [H 2 SO 4 ] = …

A comprehensive mathematical model of the heap leaching of oxide ores with application to gold–silver–copper complexes and its numerical solution strategy is presented.

A new kind of sulfide precipitant, namely, slow release sulfide precipitant (SRSP), was developed and prepared first to realize the selective recovery of copper from an acid leaching solution. The experimental results indicated that SRSP as a precipitant could selectively and efficiently recover copper and the high purity of copper sulfide slag …

Nitric acid leaching followed by solvent extraction has been reported to selectively recover copper, gold and nickel (Rao et al., 2021). The Cu-rich leach liquor of WPCB obtained after ...

Recently, Han et al. (2018) used an autoclave to study copper leaching from old Bor copper mine flotation waste. The authors found that a H 2 SO 4 concentration of 0.5 M, a pressure of 2 MPa, a temperature of 180 °C, a leaching time of 60 min, and a solid phase content of 400 g/L resulted in a leaching efficiency of 98% of the copper .

Therefore, this work focuses on optimizing the process of copper leaching, from PCB sludge by acid solution, using a full factorial experimental design, along with the multiple response method—the desirability (D) function in the Minitab 17.0 software.

In developing fitting models for the prediction of leaching of copper, cobalt and iron, Eureqa Newtonian software was used. Results confirmed that the suggested models can be effective tools to ...

A linear model for %Cu and a quadratic model for %Fe were proposed by Minitab Software. The results showed that temperature is the most effective factor in chalcopyrite leaching. Under optimal conditions, 93.08% of copper with the aim of maximum dissolution was extracted.

Gold leaching in copper-ammonia-thiosulfate media is best described as a surface chemical reaction-controlled process, suggesting that gold dissolution in thiosulfate is considerably affected by the increase in temperature. ... The gold recovery response was analyzed using Minitab 17 statistical software. Validity of the RSM model was based on ...

The results of the leaching process simulation of copper and cobalt minerals in acid-reductive media using ASPEN Plus software are given in the supplementary materials (Table S3). The control parameters of the process, such as sulfuric acid mass flow rate, SMBS mass flow rate, temperature, and leaching time, were set …

As early as 2030, at least half of BMW Group's global sales will consist of fully electric vehicles. Jetti Resources has developed a catalytic leaching technology that enables the extraction of copper from …

Abstract. 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 ore particles being leached, as much as two meters in diameter, should preclude any significant metal recovery. Dump leaching should not work; and yet it does.

This study presents the novel idea of a cyanide-free leaching method, i.e., glycine-ammonia leaching in the presence of permanganate, to treat a low-grade and copper-bearing gold tailing. …

Leaching of chalcopyrite Leaching of copper from chalcopyrite was first studied with different solvents and oxidizing agents at 60 °C. The following organic solvents were used for chalcopyrite leaching: ethanol (EtOH), propylene glycol (PG) and ethylene glycol (EG) ().The solvent has a significant effect on the leaching efficiency of iron and …

The study of copper (Cu) recovery is crucial for the entire recovery process of waste printed circuit boards (WPCBs), and Cu can be leached efficiently via a sulfuric acid–hydrogen peroxide (H2SO4–H2O2) system. To achieve high Cu recovery, it is important to evaluate the parameters of the leaching process and understand the Cu leaching kinetics. …

The use of cupric chloride as the oxidant for copper sulfides leaching has been studied for many years (Herreros et al., 2006; Herreros and Viñals, 2007; Ruiz et al., 1998; Ruiz et al., 1997). Cuprous ions are stabilized in the presence of chloride ions by forming chloro-complexes, which in turn participate in the electrochemical oxidation of ...

1. Introduction. At present, the copper mining industry in Chile and the world is undergoing big changes owing to the use of modern techniques such as predictive models based on Artificial Intelligence [1,2,3].An example of them is the use of data mining methods to study or predict copper recovery or mineral prospects [].These methods relate to data-driven …

The objective of this study is to compare the reaction kinetics of copper leaching from chalcopyrite in acidic ferric sulfate media with (UAL) and without (non-UAL) ultrasound assistance. Four leaching parameters were evaluated and optimized. The parameter with the strongest effect was temperature, followed by ultrasonic power, the …

Abstract In the present work, the leaching behavior of copper from an oxide/sulfide ore was assessed in two work phases including process optimization and kinetics modeling. In the first phase, the individual and synergistic impacts of the influential parameters such as sulfuric acid concentration, liquid/solid ratio, pulp mixing rate, …

The laboratory simulation technique has been used to determine effects of leaching variables on permeability, uranium recovery, and post-leach aquifer …

Examples of two copper recovery cycles and their relationship with variable X7. (a) shows levels of leaching ratio for cicle-1 and cicle-2, while (b) shows the different values of the variable Y ...

Hofirek and Kerfoot, 1992, Fugleberg et al., 1995 among others have investigated the reactions that take place during leaching of nickel-copper matte in a sulphate environment. The typical major phases of copper sulphide leach residue are covellite and digenite (Cu 9 S 5) for copper, and millerite (NiS) and polydymite (Ni 3 S 4) …