regulations have resulted in avoidance of high-arsenic copper sulfide concentrates and led to increased smelter penalties and lower acceptable amounts of arsenic in the concentrates treated (2). An example oflimits and penalties from the US is presented in Table 1. ... forming process and reduce the electrical conductivity of copper. The ...
The conventional smelting and refining of Ni sulfide concentrates is an effective strategy for extracting Ni from sulfide ores. However, during the smelting process, sulfur is oxidized to sulfur dioxide (SO 2), which poses a significant environmental hazard.The present work investigates the feasibility of an alternative process to recover …
The electro-melting of the sulphide copper-nickel concentrates replaced blast smelting and reverberatory melting beginning in the 1950 s (Crundwell et al., 2011). During electro-melting, sulphur is removed via thermal decomposition of sulphide minerals and reaction between metal oxides and iron sulphides.
copper concentrate in the Sable Zinc mine in Zambia. The operation went on hold after changing hands and awaiting license renewal. The fi rst stage of the Albion Process™ is fi ne grinding of the concentrate. Most sulphide minerals cannot be leached under normal atmospheric pressure conditions. The process of ultrafi ne
Copper processing - Roasting, Smelting, Converting: Once a concentrate has been produced containing copper and other metals of value (such as gold and silver), the next step is to remove impurity elements. In older processes the concentrate, containing between 5 and 10 percent water, is first roasted in a cylindrical, refractory-lined furnace …
In 2003, a high-temperature pressure leaching circuit to treat copper sulfide concentrates was commissioned at the copper/molybdenum operation at Bagdad, AZ. In late 2007, a medium-temperature pressure leaching circuit was commissioned at the Morenci mine in Arizona. The Morenci circuit was shut down in mid-2008, following a fire …
pyrometallurgical processing route of copper sulphides. Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching …
implement Teck's CESL Copper Process. The CESL Copper Process is as a medium temperature pressure leach for sulphide concentrates in the presence of chloride catalytic ions (12 g/L). In most cases a light re-grind of the mill concentrate is necessary to reduce particle size. Grinding the concentrate increases the
copper-zinc concentrates elsewhere in the world, Fluidized bed roasting unit for sulfate roasting copper-cobalt sulfide concentrates at Jadot ville, Belgian Congo. Center background is 14-ft roasting unit. Overflow calcine from roaster is withdrawn dry and quenched in launderer at left. At right, dust collected from
Copper concentrates manufacturing process Copper concentrates are mainly produced by flotation. The ore is crushed and milled to a particle size of less ... The ground ore is mixed with water and reagents, to form a slurry, where the copper sulfide mineral particles bind to the reagent, rendering a hydrophobic complex. Submitted to aeration ...
The production of copper concentrates from copper-gold sulfide minerals by froth flotation generally results in tailings with copper, silver, and gold values. The cyanidation of copper flotation tailings containing sulfides for gold recovery is an example of the formation of cyanide complexes with copper and silver during the leaching process ...
Sulfide ores are generally processed using pyrometallurgy, the extraction and purification of metals by processes involving the …
The processes for pyrometallurgical smelting of copper sulfide concentrate include matte smelting, copper matte converting, pyro-refining, and electrolytic refining. Some specific low-iron copper concentrates can be smelted directly to blister copper without matte smelting, known as the directly to blister copper process. Matte-Making …
Processes of conversion of copper-sulfide concentrate by low-temperature sintering of the concentrate without the addition of chemical reagents and …
High-arsenic copper flotation concentrates, in which the major arsenic-bearing mineral was tennantite, were leached with an alkaline sulphide system. At a pulp density of 5 wt% solids with 100–150 g/L Na 2 S and 50 g/L NaOH, over 91 wt% As was dissolved within 2 h at 100°C. From concentrates containing 3.4–4.9 wt% As, leach residues ...
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 …
GlyLeach Process–The GlyLeach Process, under development at Curtin University, Australia, is an alkaline-based process utilizing glycine—a non-toxic, non-corrosive, environmentally benign amino acid—for leaching copper, gold and silver from primary copper sulphide concentrates as well as secondary sulphide, mixed and oxide ores. …
Copper concentrates are typically processed via pyrometallurgy-hydrometallurgy consisting of smelting, converting, fire-refining and electro-refining (Fig. 4 and Table 6).
Chemical and mineralogical composition of the concentrates was determined. Sulfide concentrates were leached for 2 h under non-oxidative conditions, similar to those used in the first leaching stage of HydroCopper® process. It was shown that copper in bornite was the most active to dissolve in the studied environment.
This paper presents the results of an experimental investigation into the distribution of copper in the slag of an industrial reverberatory furnace sulfide concentrates smelting process in the copper smelter RTB Bor (Serbia). The influence of copper content in the matte, the temperature and the height of the slag on the content …
In the context of developing a novel process route for metal extraction without sulphur dioxide emission and slag waste generation, we have studied the reduction of copper–cobalt sulphide ...
pure Ni products as well as by-products, such as cobalt (Co), copper (Cu) and precious metals. However, the traditional concentrate smelting-matte refining process, whilst technologically robust, is capital ... hydrometallurgical processing of nickel sulfide concentrates and whole ores may be a remedy to these issues and hydrometallurgy …
Arsenic is a troublesome impurity in copper concentrates where it is usually present as enargite (Cu3AsS4). ... results are presented on a novel alternative process to remove selectively the arsenic from an enargite rich copper concentrate. The process includes an ... C.G. Anderson, L.G. Twidwell, "The Alkaline Sulfide Hydrometallurgical ...
An experimental investigation is presented on the oxidation of Fe(II) in aqueous sulphuric acid under oxygen pressure. The effects of partial oxygen pressure, p O 2, temperature and initial concentrations of H 2 SO 4 and Cu(II) on the oxidation process rate have been determined within the ranges applied in a new hydrometallurgical …
CESL, a wholly owned subsidiary of Teck Cominco Metals, has developed a novel hydrometallurgical process for processing copper sulphide concentrates to metal. …
Minerals Engineering Technical Service (2015) In: The rise of nickel laterites and advances in sulphide processing. Midas Engineering Group. ... Marcuson S, Khajavi LT, and Barati M (2020) Optimum treatment time for solid-state extraction of nickel from nickel sulfide concentrates at 1073 K. Metallurgical and Materials Transactions B …
Various pyrometallurgical methods for treating copper concentrates that contain appreciable arsenic are reviewed. ... "Environmentally friendly processing of copper minerals bearing arsenic and/or sulfur by ... "Roasting of complex concentrates with high arsenic content", Advances in Sulfide Smelting, Technology and Practice, (H.Y. Sohn ...
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.%).
Haver and Wong (1972) and Bartlett and Haung (1973) were the first to propose the AFR process in order to treat copper sulfide concentrates ( Haver and Wong, 1972;Bartlett and Haung, 1973). ...
implement Teck's CESL Copper Process. The CESL Copper Process is as a medium temperature pressure leach for sulphide concentrates in the presence of chloride …
