Leaching Thermodynamics of Low-Grade Copper Oxide Ore …
This paper describes a highly alkaline low-grade copper oxide ore. Copper can be selectively leached out while other metals are retained. A thermodynamic model of the CuO-(NH4)2SO4 …
Characterization and Optimization of Copper-Cobalt Oxide Ores …
The copper-cobalt ore received from Congo contains around 2.0% copper and 0.356% cobalt, with oxidation rates of 92.09% and 88.57% for Cu and Co, respectively. Malachite and cornetite are the main copper minerals, while heterogenite and carrollite are the main Co-bearing minerals. To optimize the leaching efficiency of Cu and Co for this type of ore, various …
Agitation Leaching Behavior of Copper–Cobalt …
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 …
Leaching kinetics and predictive models for elements extraction …
The results of experimental investigation on the study of leaching kinetics of copper oxide ore in sulphuric acid solution were discussed. The effect of time, pH, stirring speed and temperature on the extend of dissolution was investigated. The XRD analysis indicated that copper is mainly in the form of malachite mineral CuCO 3 (OH) 2. The ...
Extracting Copper from Its Ore: The Process Explained
Hydrometallurgical Process for Oxide Ores. For oxide ores, a different method called the hydrometallurgical process is used, involving heap leaching, solvent extraction, and electrowinning. Heap Leaching. Oxide ores are crushed and heaped onto an impermeable pad, where they are irrigated with a dilute sulfuric acid solution.
Efficient Acid Leaching of Low Carbonate Copper Oxide Ore: …
Recent focus on hydrometallurgical methods for non-sulfide copper ores prompted a study on leaching a copper oxide ore containing 2.22% Cu, 44.9% SiO2, 6.94% Al, 6.61% …
Characterization and Optimization of Copper-Cobalt Oxide …
To optimize the leaching efficiency of Cu and Co for this type of ore, various operating parameters were investigated, including particle size, pulp density, acidity, leaching …
Leaching Behaviors of Yulong Refractory Oxide Copper …
oxide copper ores from Yulong Mines during the agitation leaching process; (2) to investigate the leaching behavior and kinetics of this type of oxide copper ores in sulfuric acid solutions. Experimental Materials A sample of oxide copper ores under study was obtained from the agitation leaching operation unit at Yulong Copper Mines, Tibet of ...
UNDERSTANDING ACID CONSUMPTION AND ITS …
data for copper recovery from an associated copper ore. INTRODUCTION Acid consumption during copper leaching of oxide ores is a very important issue. Acid consumption can determine whether or not a project is economically and technically feasible. The cost of supplying acid to a leaching operation is closely tied to the acid consumption, the
Leaching kinetics and predictive models for elements …
The effect of pH on the leaching of copper, cobalt and iron from the copper oxide ore (0.77 M H 2 SO 4, 5 g of ore, particle size: 80% À62.23 mm, S/L: 13%, 60 min, ambient temperature ( § 23 ...
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 ...
Acid leaching of oxide–sulfide copper ore prior the …
Direct leaching process of copper oxides or complex ores attracts considerable scientific and engineering attention, which plays an important role in the sus-tainable development of copper …
Leaching of Copper Ores: Effects of Operating Variables
in a total estimate of 60 million tons of copper ore reserves, with an average grade of 1.63 % [17]. There are many studies published in the literature on the leaching of non-Jordanian copper ores using various lixiviant. For example, Madsen et al. [19], developed a shrinking core model to describe the leaching of copper from sulfide ores
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dependent on leaching ores containing a large proportion of copper oxide minerals. However, this ... routinely used for oxide or acid soluble copper determinations at commercial laboratories in the ... dissolution with sodium cyanide of assay-type samples. Primary sulfide minerals, such as chalcopyrite, are essentially unleachable under ...
PROCESS EVALUATION AND ECONOMIC ANALYSIS FOR …
Leaching is a hydrometallurgical process for the recovery of metals from ore bearing rocks. Leaching in situ has tremendous potential and seems to be the technology of the future. Copper from secondary sulfide minerals, like chalcocite and covellite, can not be easily dissolved within a short period of time using dilute acid. When an oxide
Leaching of Copper Ores: Effects of Operating Variables
0 – 1000 rpm, and solid/liquid ratio of 1 – 4 g/L. It was found that the rate of leaching of copper ore with hydrochloric acid or sulfuric acid, increases with temperature and acid concentr.
Copper Heap Leaching & SX-EW Slideshow
Heap leaching & SX-EW is a method of extracting pure copper from oxide ore by placing the crushed ore on a pad in a heap and spraying the leaching solution, sulphuric acid, over the heap. The acid trickles through the heap and dissolves the copper mineral into solution. The leach solution collects at the bottom of the pad in a collection pond.
Leaching of Copper Ores: Effects of Operating Variables
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 ...
Acid leaching of oxide–sulfide copper ore prior the …
running process. Sun at al. [14] performed the copper leaching from low grade copper oxide ore by sulphuric acid, and they have obtained leaching percent of cop-per over 90%. Compared with the copper leaching effi-ciency of about 35% in the mill running technology the leaching process has achieved a better economic result.
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 period of 60 ...
3. Processing of Copper Ore
The process varies slightly depending on the type of ore that is being mined. Sulfide ores are first put through a jaw or gyratory crusher to reduce the rocks to about 7 - 8 inches. ... Oxide ores are generally just crushed prior to further processing since leaching does not require the same small particle size as floatation. ...
Copper Heap Leaching | Encyclopedia MDPI
According to Toro et al. [], copper mining is an industry that is in constant growth, and approximately 25 million tons are produced annually worldwide [].Among the copper minerals on the planet, the vast majority correspond to sulfide ores [].Within these copper minerals, chalcopyrite stands out as the most abundant, representing 70% of all minerals that contain …
OVERVIEW OF GANGUE MINERALOGY ISSUES IN OXIDE …
oxidised copper ores, expressed in terms of the following parameters: Oxide/sulphide class e.g. oxide rock, oxide alteration, sulphide rock, precipitates, alteration products and original rock minerals in equilibrium with leach solution Mineral type, property and metal elements in precipitates e.g. copper minerals,
Acid leaching of oxide-sulphide copper ore prior the …
This kind of ore is usually processed by mill running and then smelting, and the copper recovery is about 35% during the mill running process. Sun at al. [14] performed the copper leaching from low grade copper oxide ore by sulphuric acid, and they have obtained leaching percent of …
Efficient Acid Leaching of Low Carbonate Copper Oxide Ore…
Harichandan and Mandre 13 used sulfuric acid with concentrations of 1 M and 3 M for the leaching of a mixed oxide-sulfide copper ore containing 67.19% SiO 2 and considered the concentration of 1 M as the optimal acid concentration. They concluded that the leaching efficiency increased with increasing the leaching time to 120 min, and it was almost constant …
Leaching Practices at Mantos Blancos
Empresa Minera de Mantos Blancos S.A. operates two copper mines in Chile: Mantos Blancos and Mantoverde. Oxide ore is processed by acid leaching followed by SX-EW to produce copper cathodes. In order to define the leach process adequately for each ore, an extensive metallurgical testwork program
Leaching kinetics and predictive models for elements …
Results of dissolution studies showed that the copper oxide ore leaching in H 2 SO 4 solution increase with increasing time, pH, stirring speed and temperature at fixed H 2 SO 4 …
RECOVERY OF COPPER FROM OXIDE COPPER ORE BY FLOTATION AND LEACHING …
The aim of this study was the recovery of copper from the oxide copper ore by froth flotation and agitating sulphuric acid (H2SO4) leaching. The ore with 4.21% copper grade used in this study was ...
(PDF) Copper heap leaching: Process, principles and …
Unstratified and artificially stratified samples of oxide-copper ore were percolated with water followed by acid leaching in a custom-made laboratory apparatus. ... Since GAC competes with the ...
Heap Leaching Oxide and Sulfide Copper Ores
The acid consumptions curves for the oxide copper ore (number 3) with a high iron oxide-tactile gangue were somewhat different than those of oxide copper-porphery gangue ore number 1. In tests 9 through 14 the incremental acid curves were generally low at the start, fairly high after 3 to 4 days of leaching, and very high thereafter.