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@misc{etde_20376210, title = {Leaching of copper concentrates with high arsenic content in chlorine-chloride media; Lixiviacion de concentrados de cobre con alto contenido de arsenico en medio cloro-cloruro} author = {Herreros, O, Fuentes, G, Quiroz, R, and Vinals, J} abstractNote = {This work reports the results of copper concentrates …
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The main Cu-bearing mineral in copper concentrates consumed in smelters around the world is chalcopyrite (CuFeS 2).Minor participation in this consumption is copper concentrates containing secondary copper minerals, such as chalcocite (Cu 2 S) and bornite (Cu 5 FeS 4).The main issues concerning these copper concentrates …
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The correlation between copper extraction in pressure leaching and the arsenic content of the feeds to pressure leaching was explored on a wide series of blends between the high-As and low-As copper concentrates, acid plant waste solution and metallurgical dust, with results shown as a function of Fe:As mole ratio of the combined …
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Potential metallurgical treatment of copper concentrates with high arsenic contents J o u r n a l by I. Mihajlovic′*, N. S̆trbac*, D. Nikolic*, and Z. Z̆ivkovic′* This paper investigates a potential method for arsenic removal from copper concentrates using hypochlorite leaching. ... In order to minimize the problems associated with the ...
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This work reports the results of copper concentrates leaching, which have high arsenic contents (up to 2.5 %). The treatments were carried out using chlorine that forms from sodium hypochlorite and sulphuric acid. The aim of this work is to obtain a solution having high copper content 4 to 6 g/1 and 5 to 7 g/1 free acid in order to …
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The report starts with a review of the basic concepts related to the mineral composition of copper ores and concentrates, then a detailed quantification of the production and …
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Copper Concentrates. Environmental and Human Health hazard classification. Application to the assessment of substances "Harmful to the Marine Environment" …
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The need for analysing copper concentrates to determine the copper content accurately and rapidly is increasing. Hence, there exists a demand for automated systems that perform the wet chemistry methods for the analysis of copper concentration in powder samples. Automation brings the advantage of increased hands-
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According to the Metals Economics Institute of Japan, arsenic content in copper concentrates processed in Japanese smelters has gradually increased since 1991 from 400 ppm to over 1,000 ppm in 2016, while the copper content in the concentrates decreased from near 33% to 27%Cu.26 This represents a 3 times increase in the units …
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The copper content in the concentrates ranged from 10.8 to 19.1% (copper occurred in chalcopyrite), while the content of nickel was within 4.6–9.5% (nickel occurred in pentlandite and violarite). Although the copper content was higher than the content of nickel in all concentrates, the rate of nickel leaching significantly exceeded that of ...
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Table 1 presents the chemical composition of the concentrates, showing the heavy contamination by Zn and As, and also by many hazardous elements such as Pb, Cd, Bi, Hg, Tl, and others. The main difference between the two concentrates was the Zn content, being over 3% in the Ch3. The granulometry is given in Fig. 1.A characteristic …
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Inner Cu foil and outer Cu were the main copper concentrates, with copper contents of 83.39 wt% and 88.57 wt%, respectively. The high copper liberation degree of these copper concentrates explains the high delamination extent of these delaminated PCBs products. Considering the laminated structure of PCBs, organic swelling could be …
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In general, Fe and Si are the major compositions of CS, with minor quantities of additional elements such as Cu, Al, Mg, and Ca. The copper content in CS ranges from 0.17% to …
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Links to Books and Digital Library content from across Sage. VIEW DISCIPLINE HUBS. Information for. Authors ; Editors ; Librarians ; Promoters ... Malmström R. 1958. Flash smelting copper concentrates, JOM, 10, (7), 395–400. Crossref. Google Scholar. Geveci A, Rosenqvist T. 1973. Equilibrium relations between liquid copper, …
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A reduced oxygen content roasting step was incorporated, initially to reduce the mercury content, but as a secondary effect the arsenic content was also reduced (Stuart and Down, 1973). Roasting was also used to reduce the arsenic content of copper concentrates at the El Indio mine, Chile.
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This document specifies an acid digestion and vapour generation atomic absorption spectrometric method for the determination of the mercury content in copper sulfide concentrates. This document is applicable to mass fraction of mercury between 5 µg/g and 65 µg/g in copper sulfide concentrates.
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Based on the study of the mechanism of arsenic change with different oxygen contents, a new process of oxygen-controlled roasting is proposed and successfully applied in the pilot test, so that the residual arsenic content in copper concentrates is lower than the standard of arsenic content in imported minerals from China (0.5 wt.%).
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Existing and new data on production of two copper concentrates differing in copper, organic carbon and other metals contents by reflotation of the final industrial flotation copper concentrates ...
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Copper concentrate is recognized as a high-purity source of copper. Its distinct properties include superior conductivity, resistance to corrosion, and malleability. In the …
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The composition of copper concentrates was assessed for 122 samples, covering the world-wide copper concentrates production (table 1 and 2). Copper concentrates are …
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Lime content in concentrate About 0.05 to 0.51 % of lime is present in copper concentrate. The ratio of Iron/Silica = 1.2 is needed for proper extraction.
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ISO 10258:2018 specifies two titrimetric methods for the determination of the copper content of copper sulfide concentrates in the range 15 % (m/m) to 50 % (m/m), using sodium thiosulfate after separation (method 1) or without separation (method 2) of copper from interfering elements. General information. Status
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The copper industry is under increasing pressure to manage concentrates with a high content of arsenic. Arsenic-laden concentrates have always been an issue for the industry, but as complex ore bodies increase and environmental regulations tighten, the problem is mounting at a time when demand for copper is projected to hit all-time highs, …
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The high arsenic content of such ores/concentrates combined with their refractory nature have directed the metallurgical industry towards developing efficient technologies for the treatment of ...
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method for the determination of the mercury content in copper sulfide concentrates. This document is applicable to mass fraction of mercury between 5 µg/g and 65 µg/g in copper sulfide concentrates. 2 Normative references The following documents are referred to in the text in such a way that some or all of their content
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composition of copper concentrates may vary widely, and consequently, different copper concentrates may have different hazard profiles. Therefore, the hazards of copper concentrates should be assessed on a case-by-case basis by the producers. To assess the environmental criteria, the metal release from 12 representative copper …
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Thus, in the pyrometallurgical treatment of copper concentrates with high arsenic content, there is a risk of producing arsenic emissions to the atmosphere. Therefore, the smelters impose heavy penalties on copper concentrates that contain more than 0.5% arsenic [1]. The arsenic in copper concentrates is usually present as enargite (Cu 3AsS
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Atomic absorption spectrometry has the characteristics of very high accuracy. In order to find out the factors that affect the detection, it is necessary to analyze the silver content in copper ...
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Concentrates are the raw material for all copper smelters, which by processing it obtain an impure form of metallic copper, anode or blister copper, which is later used to produce high purity refined copper.
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