Hydrometallurgical processes are often coupled to pyrometallurgical ones (e.g., the electrochemical refining of metals obtained by pyrometallurgical process, or roasting and high-temperature reduction of hydroxides precipitated from solutions obtained by ore leaching) [1,2,3,4].The main advantage of the hydrometallurgical process is that it …Web

The simulation model of copper and cobalt ore leaching process developed in this article can help to fill the literature gap. In this work, a combined procedure of experimental studies and simulation in ASPEN Plus is used to analyze the process of copper and cobalt extraction from oxidized ores in sulfuric acid and sodium metabisulfite …Web

Ambo et al. model the selective leaching of copper from preconcentrated copper ores based on near-infrared sensors, revealing that the rate of leaching …Web

In process scheme 1, indirect bioleaching (IBL), the ore bed porosity is assumed to be completely filled with the leaching solution and leaching of copper sulfides occurred just with the 3 g/L of ferric contained in the incoming leaching solution produced in an external bioreactor (Pakostova et al., 2017; Biomore, 2018).Web

Copper production by heap leaching, coupled with solvent extraction and electrowinning (SX-EW), is a well-established technology, with an annual output of about 3.7 million tonnes (Mt) of copper metal. ... with a thorough understanding of the overall deposit geology, including ore and gangue mineralogy, the domains that comprise the deposit ...Web

Section snippets Crushed ore agglomeration. Crushed ore agglomeration has two major aims. First, it is the best opportunity for the thorough application of the leaching solution prior to building the heap and "kick starting" the leaching process itself (Bouffard, 2005, Dhawan et al., 2012a, Kodali et al., 2011a, Purkiss and Anthony, 2004).Web

The objective of this study was to investigate the leaching of a non-sulfide copper ore by a new bioleaching process, the Ferredox process. In the Ferredox process, Acidithiobacillus ferrooxidans reduces ferric ions and oxidizes sulfur at low pH under anaerobic conditions. In this study, a bacterial culture (mainly A. ferrooxidans) was …Web

Jetti's researchers demonstrated how during oxidative leaching, such as bioleach or chloride leach processes, a copper rich surface forms on the surface of the chalcopyrite. This rich product ...Web

It can be seen from Eq. () that the higher the Fe 3+ concentration, that is, the higher the redox potential, the higher the leaching rate of chalcopyrite.Hirato et al. [] testified that the leaching of chalcopyrite showed parabolic-like kinetics initially and then showed linear kinetics, and that Fe 3+ influenced the leaching rate of copper and the leaching …Web

We compared the results of extraction of various metals from samples (leaching of ore and waste with sulfuric acid) for different concentrations of D2EHPA. The copper was recovered from leaching liquor approximately in (Table 2). The results of extraction of vanadium, molybdenum and uranium are shown in Figs. 2,,3 3 and and4 4.Web

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.Web

Chalcopyrite is the world's most abundant copper ore, and additional production from this newly available resource could significantly increase copper output from existing mines to meet the growing needs of the green energy transition. ... Our research enables a much fuller understanding of the process involved in copper leaching and cements ...Web

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, …Web

1. Introduction. In situ leaching (ISL) is the circulation of a fluid through an ore deposit to dissolve a target metal or mineral, with subsequent return of the liquor to the surface for processing. In some cases, lixiviant is applied to formations using a system of injection and recovery wells (see Fig. 1 ).Web

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 ...Web

Mineralogy of Raw Materials. Copper in the Western United States is produced from low-grade ore bodies found... Chemical Reactions. Oxidized copper ores, mixed oxide-sulfide ores, and those sulfide ores …Web

Agitation leaching is a promising technology in hydrometallurgy for treating copper–cobalt oxide ores. In this work, the behavior of oxide ores containing around 2.3% Cu and 0.3% Co received from Congo was investigated for varying particle size, acidity, pulp density, temperature, leaching time, and reduction potential. XRD, optical microscopy …Web

Low-grade ores are treated by dump leaching, while vat leaching can be used to treat higher grade oxide ore. Agitation leaching in stirred tanks is applied to both oxide and sulfide materials: the ...Web

Copper extraction from primary copper sulfide ore from a typical porphyry copper deposit from Antofagasta, Chile, was investigated after leaching with a chloride-ferrous media at two temperatures. The …Web

The copper heap leaching, solvent extraction, and electrowinning process has revolutionized the copper industry and significantly reduced the capital and operating costs for the production of copper from low-grade ores.A schematic of a typical heap leach/SX/EW operation is shown in Fig. 4.29.The SX part of the flowsheet recovers …Web

For the hydrometallurgical treatment, bio heap leaching of 40,000 t of low-grade ore using agglomeration and aeration was proven to achieve a copper recovery of 32.6% for the chalcopyrite portion of the ore over 326 days of operation. On the economic side, the operating cost of the process per tonne of copper cathode for both processes …Web

Copper oxide ore has a complex composition, and a low recovery rate is often achieved via the traditional sorting method. A new combined process of flotation–high-gradient magnetic separation–leaching is proposed here to recover copper minerals. The test results showed that the flotation process was successful when using sodium sulfide …Web

Serbia (the approximate Cu content in the ore ranges from 0.2 - 0.3 % with >10 % copper in the form of oxide minerals). 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 inWeb

Sulfuric acid leaching was conducted on waste copper dust. The deductions reached are that extraction of copper from waste copper dust (WCD) takes place rapidly and plateaus after approximately 30 minutes. ... WCD is a complex low-grade copper ore in which the copper content frequently occurs in conjunction with other metals including …Web

Heap leaching of oxidized copper ore of the Meskani-Anarak deposit conducted with sulfuric acid in laboratory scale. Mineralogical studies indicated that samples are mainly composed of Malachite, Azurite and Cuprite and the Copper (Cu) grade was about 1.32%. At the first step, the bottle roll test was carried out at different particle sizes in ...Web

In situ leaching (ISL) is the circulation of a fluid through an ore deposit to dissolve a target metal or mineral, with subsequent return of the liquor to the surface for …Web

The oxidation of sulfide-based ores is industrially relevant as it facilitates the extraction of valuable metals and eliminates undesired elements from an ore. Even …Web

Keywords: heap leaching; bacterial leaching; cryomineralogenesis; low-grade copper-nickel ore; raw materials 1. Introduction On the one hand, off-balance sulfide ores from abandoned and producing deposits, overburden rocks, mill tailings, and non-ferrous slag are considered to be one of the largest sources for non-ferrous metals production.Web

Leaching of Sarcheshmeh copper oxide ore in sulfuric acid solution. Min Metall Explor, 25 (2) (2008), pp. 85-90. CrossRef View in Scopus Google Scholar [7] B. Emmanuel, J.A. Ajayi, E. Makhatha. Investigation of copper recovery rate from copper oxide ore occurring as coarse grains locked in a porphyritic fine grain alumina and silica.Web