1. Introduction. The continuous development of the global economy has resulted in a high demand for copper production and high copper consumption [1], [2], and exploitation and effective use of copper oxide mineral resources have attracted attention [3].Copper oxide deposits evolve from shallow copper sulfide deposits after longterm oxidation, and they are widely and abundantly distributed in ...
This work investigates the effect of an agglomeration and curing pretreatment on leaching of a copper sulfide ore, mainly chalcopyrite, using minicolumns in acidnitratechloride media. Ten pretreatment tests were conducted to evaluate different variables, namely the addition of nitrate as NaNO3 ( and kg/ton), chloride as NaCl ( and kg/ton), curing time (20 and 30 days) and ...
Copper was discovered at the Ore Knob deposit in the northwest part of the state in the early 1850s, and mining began in 1855. The ore is massive sulfide and disseminated ore in mica schist and gneiss, and amphibole schist and gneiss. The principal ore mineral is chalcopyrite, which occurs with pyrrhotite and pyrite. The mine operated until ...
As earlier stated, pyrometallurgical processing of the ore involves the roasting and smelting of the sulfide ore to produce a matte, a mixture of copper, iron, and sulfur. During the smelting ...
This process uses aqueous (waterbased) solutions to extract and purify copper from copper oxide ores at ordinary temperatures, usually in three steps: heap leaching, solvent extraction, and electrowinning. Heap Leaching and Solvent Extraction of Oxide Ore. Heap Leaching is the process of using percolating chemical solutions to leach out metals.
In some NiCu sulphide ores with low sulphide mineral content, but rich in precious metal levels, processing requires activation rather than depression. Recent work suggests that the ammoniacal solution of copper sulphate is more effective on pentlandite than the copper sulphate itself in the alkaline range [ 54 ].
In processing ore to recover the metal of interest, steps of the process can be divided into (a) the steps to prepare the metal for separation from the rest of the rock or other metals, and (b) steps to actually remove the metal from the rock and unusable or uninteresting parts of the ore. ... (Copper forms copper sulfide and removes the ...
Extrapolations of copper sulphide grain exposure data indicate that the portion of copper available for leaching decreases to 10% when the ore particle size is increased to between 100 and 200 mm. In terms of kinetics, the observed leaching rate is a product of the chemical reaction rate itself and various transport processes such as for heat ...
Flotation is a common mineral processing method used to upgrade copper sulfide ores; in this method, copper sulfide mineral particles are concentrated in froth, and associated gangue minerals are separated as tailings. However, a significant amount of copper is lost into tailings during the processing; therefore, tailings can be considered secondary resources or future deposits of copper.
T2K has the advantages of strong collection ability, high selectivity and partial foaming ability when processing copper sulfide ore or gold and silverbearing copper sulfide ore. PN405 PN405 has a strong selective collecting and foaming capacity for copper ore. By using this agent alone or with a small number of xanthate collectors, a better ...
Demand for copper continues to grow due to many factors such as increasing human population and the green energy transition. Mining and processing of complex copper sulphide ores, that are low grade, highly disseminated and contain troublesome gangue minerals such as clays, is becoming more common.
Therefore, the main objective of the study was to optimize the process parameters for the flotation of base metals from a nickelcopper sulphide ore. 2. Materials and Methods 2. 1. Materials The nickelcopper sulphide ore used in this study was supplied by Trojan Nickel Mine located in Bindura, Zimbabwe.
1. Grindingflotation process: This process is suitable for processing copper minerals with coarse and uniform particle size, loose combination of copper minerals and gangue, and smooth and flat contact, the raw ore is ground to 200 mesh, accounting for 5060%, and the copper minerals can be dissociated as monomers. This flotation process is simple and the cost of beneficiation ...
4. Beneficiation of Copper Ore. The next step in processing is called beneficiation. This is the first step in concentrating the copper into a more useable form. 5. Smelting and Extraction. The next step in the process flow is smelting for sulfide ore concentrate and solvent extraction for oxide ore leach solution.
The concentrates of copper from sulfides ores are generally performed by flotation and then processed by pyrometallurgic or hydrometallurgic routes to extract copper from the concentrates.
The copper ore in Chilean copper porphyry deposits is often associated with molybdenum minerals. This coppermolybdenum (CuMo) sulfide ore is generally mined from various locations in the mining site; thus, the mineral composition, oxidation degree, mineral particle size, and grade vary. Therefore, in the mining operation, it is common to blend the ores mined from various spots and then ...
The chemical composition of Chilean copper sulfide ores in terms of Cu and Fe concentrations are shown in Table 3A, whereas Table 3B shows a more detailed chemical composition of copper sulfide ores from northern Chile. Note that the copper concentration varies between approximately and wt% depending on the region.
The economic extraction of copper from lowgrade ores requires lowcost processing methods such as in situ, dump and heap leaching. Bacterially assisted heap leaching of lowgrade copper sulphides is a developing technology that has been applied successfully for the extraction of copper from secondary sulphide minerals such as chalcocite at a ...
LixTRA™ Copper Leach Technology now offers the industry its first leaching additive that is compatible with the entire Leach à SX EW process. History Heap leaching copper from oxide and secondary sulfide ores has been practiced commercially since the late 1960's. This methodology is mostly used for lowgrade ores and involves
T he copper mining industry is reaching a turning point. Surface oxide deposits are depleting and copper miners are turning their attention to untapped sulfide ores found deeper underground. However, sulfides require more expensive processing techniques since they are not responsive to standard technologies that are used in oxide heap leaching.
processing copper ores and choosing reagents are presented in [57]. The flotation process is most often used for copper sulfide ores due to the good floatability of most sulfides. A flotation flowsheet usually includes a rougher stage and several recleaner stages. For porphyry copper sulfide ores, the Palabora processing plant (South
The experimental study on the grinding of two copper sulphide ores using the Magotteaux mill followed by batch flotation of the grinding product in the Magotteaux cell showed that the grinding environment has some influence on electrochemical parameters of the prepared pulp, particle size distributions of solid mass and Cumetal mass in the ...
Different methods are used to process copper sulfide ores depending on the concentration of copper within the ore — higherconcentrated ores can be separated via smelting, while...
For copper sulfide ore, electrolysis is the final stage in the process of pyrometallurgy, in which anode copper slabs are hung in a large tank full of a copperbased electrolyte solution and an electric current is applied, resulting in the plating of copper onto % pure copper cathodes.
In the 197090s, it was suggested that different additives be used to intensify the sulfide copper ore leaching process with acid solutions, such as sulfuric and nitric iron (III) and ammonium salts, fluoride ions, surfaceactive substances, oxygen, ozone, sodium chloride, nitrates and chlorides of alkaline, and alkaline earth metals [1,2,3,4 ...
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