copper sulphide leaching process

In this process, ammonia leaching of sulfide minerals of copper, nickel, cobalt and iron was conducted at a temperature of about 105 °C and air pressure of 0.8 MPa. Under these conditions, copper, nickel and cobalt were dissolved but iron was precipitated in hydroxide form.

Currently, approximately 60% nickel is extracted from nickel sulfide ore, but in recent years, high-grade nickel sulfide ore is gradually exhausted due to the overexploitation, and the low-grade ore that is difficult to process has become the main raw material for nickel extraction (Chen et al., 2017, Chen et al., 2018, Guo et al., 2009, He et ...

In this process, ammonia leaching of sulfide minerals of copper, nickel, cobalt and iron was conducted at a temperature of about 105 °C and air pressure of 8 ATM. Under these c onditions, copper ...

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 …

Hydrometallurgical extraction accounts for about 20% of total primary copper production. Most of this is produced by heap leaching. Heap leaching consists of trickling H2SO4-containing lixiviant ...

Three copper sulphide leaching and refining processes are discussed: total pressure oxidation, ferric sulphate leaching and copper …

Abstract Bioleaching of metal sulfides is performed by diverse microorganisms. The dissolution of metal sulfides occurs via two chemical pathways, either the thiosulfate or the polysulfide pathway. These are determined by the metal sulfides' mineralogy and their acid solubility. The microbial cell enables metal sulfide dissolution …

Heap leaching generates a pregnant leach solution (PLS) containing 1–6 g/L Cu²⁺, which is sent to solvent extraction and electrowinning for copper production.

The Albion Process™ is a combination of ultrafi ne grinding and oxidative leaching at atmospheric pressure. The feed to the Albion Process™ is a concentrate containing base or precious metals, and the Albion Process™ is used to oxidise the sulphide minerals in the concentrate and liberate these metals for recovery by conventional means.

The use of this biochemical method in the copper leaching process resulted in a significant reduction in sulfuric acid consumption, by 40%, and a copper recovery rate of 87.2%. ... In the 1970–90s, it was suggested that different additives be used to intensify the sulfide copper ore leaching process with acid solutions, such as sulfuric and ...

Request PDF | On Oct 1, 2012, C.R. Bennett and others published A comprehensive model for copper sulphide heap leaching: Part 1 Basic formulation and validation through column test simulation ...

For example, acid leaching has been successfully used to process oxidized and mixed ores, pressure oxidation is usually used to process sulfide concentrates, and bioleaching is widely used to process low-grade sulfide ores (heap bioleaching) and finds limited use for processing substandard copper concentrates [18,19,20,21,22,23,24,25]. It ...

Due to the near-term transitioning from copper oxide heap leaching to copper sulfide processing at a large number of mine sites, there is much interest in finding a cost-effective leach process ...

copper oxides have been in common use for some time. Prior to the development of the Sherritt-Gordon process for nickel and cobalt in which copper is recovered as high grade copper sulfide, copper sulfides were economically recovered in a hydrometallurgical process only during the leaching of waste dumps. . Need for Hydrometallurgical …

The typical scheme of industrial heap leaching process could be shown by Fig. 1. Download : Download high-res image (502KB) Download : Download ... Cu 2+ in ASM) could have a good catalytic effect on copper sulfide leaching, but it does not mean that all ions and concentration can play a positive role. The ASM containing a large …

One solution is to be able to process copper sulphide ores hydrometallurgically. However, it is widely known that sulphide copper ores—and …

The CuproChlor ® process, unlike other copper sulphide leaching methods, has several advantages: One of these advantages is the short heap leaching times, which range from 100 to 110 days . According to the study carried out by [ 83 ], bioleaching has a leaching time of approximately 167 days in column tests, and a time of 270 days in the …

The method used to extract copper from its ores depends on the nature of the ore. Sulfide ores such as chalcopyrite ( CuFeS2 C u F e S 2) are converted to copper by a different method from silicate, carbonate or sulfate ores. Chalcopyrite (also known as copper pyrites) and similar sulfide ores are the commonest ores of copper.

The process uses thermophile bacteria to oxidize and leach copper from sulfide concentrates. The thermophile bacteria oxidize sulfide minerals to metal sulfates …

More than a few companies and technology providers claim to have solved the primary copper sulphide leaching conundrum, but only one has close to 30 years of R&D and the Rio Tinto name behind it. ... The eventual aim, according to Burley, is to deliver carbon-neutral copper from the Nuton process, yet Rio estimates it can already …

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 …

The complete copper pressure leaching process concept includes pressure leaching in an autoclave to produce copper-containing pregnant leach solution. ... High-temperature POX (220°C) provides fast oxidation kinetics, almost complete sulfide sulfur oxidation, and high copper extraction (>99%). Medium-temperature POX (150°C) results …

The Zaldívar open-pit, heap-leach copper mine, 175 km southeast of Antofagasta, is currently in the process of transitioning to chloride leaching operations with Cuprochlor. The project, which includes an upgrade of the SX plant and the construction of new reagent facilities and additional washing ponds for controlling chlorine levels, was ...

Inoculating the bacterial community with ferric iron (Fe 3+) under shaking conditions resulted in rapid copper recovery from bornite, leaching 40% of the Cu content after 10 days of cultivation. The addition of ferrous iron (Fe 2+) instead promoted Cu recovery of 30% at day 48, clearly delaying the leaching process. More efficiently, the ...

Coppermaking from sulfide concentrates entails two major steps: smelting and converting. In continuous direct-to-copper smelting process these two steps are combined into one. The principal advantages of this process are: isolation of SO2 emission to a single, continuous, SO2-rich gas stream, minimization of energy consumption and …

In this process, oxidation of the sulphide minerals in the copper concentrate provides heat and acid for the leaching reactions, while the limonite or transition laterite ore consumes acid and provides a …

First Refractory Copper Leaching Using Albion ProcessTM o Sable received a parcel of sulphide copper concentrate containing approximately: 30% Copper (predominantly Chalcopyrite, Bornite and lesser amounts of Chalcocite) 19% Total Sulphur 14% Iron o Being originally designed as whole ore leach tanks, their sizing was excessive compared …

In situ leaching (ISL) is an attractive technique that enables copper recovery from copper oxide ores that are either low-grade or located at depths too great to be economically exploited through conventional methods. At present, in situ leaching (ISL) has been applied to intact copper oxide ores, in particular, those which (i) present a good …

Most refineries that process nickel matte in sulphuric acid solution selectively leach nickel over copper producing a small quantity of copper sulphide rich leach …

Biofilm formation within the process of bioleaching of copper sulfides is a relevant aspect of iron- and sulfur-oxidizing acidophilic microorganisms as it represents …

This process involves the leaching of copper from sulfide minerals using Fe 3+ ions, which is a strong oxidizing agent, in stirred reactors at atmospheric pressure and elevated temperatures (80-90 ...

This oxidation-reduction process is usually carried out in a separate furnace to ensure that the final smelter product reaches the level of 99.5 percent copper that is required for electrolytic refining. At this point, the copper is cast into anodes, the shape and weight of which are dictated by the particular electrolytic refinery. Leaching

Sulphide leaching is exothermic, generating its own heat to facilitate leaching of copper; Air, ground water, acid and electricity are the primary inputs, together with a limited number of other reagents required in the process, which reduces production and …

Cui et al. reported a two-stage roasting–water leaching process for extracting valuable metals from copper–nickel sulfide concentrate. In the first stage, ammonium sulfate was added and roasting was carried out at 500 °C for 2 h; in the second stage, sodium sulfate was added for roasting at 680 °C for 2 h; finally, the leaching rates …