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Hydrophobic deep eutectic solvents for the direct leaching of nickel

Various approaches for nickel leaching process have been proposed, such as heap leaching, alkali leaching, ... × 100 where C L,M,DES is the concentration of each metal M in DES phase after leaching, w M,Ore is the weight of each metal M in ore added to the glass vial, V is the volume of the leaching agent.

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(PDF) Study of Nickel Leaching Using Sulfuric Acid …

The kinetics analysis showed that rate determining step of leaching ore nickel laterite with H2SO4 solution on atmospheric pressure is controlled by diffusion through solid layer product.

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Optimal parameters of the heap leaching of oxidized nickel ores …

It is shown that all three investigated variable parameters of the process, namely, the volume of leaching solution, the durations of pause between irrigations, and the concentration of sulfuric acid in the solution exert a significant influence on the efficiency of nickel extraction from the ore in the 0–30% stage of nickel extraction.

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Nickel Recovery Optimization and Kinetic Study of Morowali Laterite Ore

Nickel plays a critical role in the mining industry. However, the presence of nickel in the primary source of sulfide minerals is decreasing. Focus has since turned to laterite ore, which contains up to 80% Ni metal. The purpose of this study was to optimize nickel leaching using sulfuric acid and conduct a kinetic analysis to discover the mechanism that best controls the …

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The Development of Nickel Laterite Heap Leach Projects Rev 0

in Australia, among others. Indeed, most new nickel projects are investigating heap leaching as an option for at least a portion of the production. On the surface, heap leaching of a nickel laterite would not appear to be attractive owing to the low permeability of most nickel laterite ores, coupled with the expected high acid consumption and long

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Alkaline Hydrothermal Treatment and Leaching Kinetics of

A new process of extracting silica from laterite nickel ore by hydrothermal treatment with sodium hydroxide as reaction auxiliary agent was proposed. The mineralogical transformation and silicon extraction kinetics of laterite nickel ore in alkaline hydrothermal treatment were studied. The effects of reaction temperature (175 ~ 250℃), molar ratios of sodium hydroxide to …

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Transformation mechanism and selective leaching of nickel and …

Based on the mechanism, air roasting and the addition of hydrogen peroxide were adopted to effectively reduce the leaching ratios of impurities such as Fe and Al, and achieved …

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Comprehensive Review on Metallurgical Upgradation Processes of Nickel

Extracting nickel from sulfide ore generally refers to the process of melting nickel from nickel sulfide ore into low-nickel matte or leaching nickel into solution. Its metallurgical technologies are primarily concerned with pyrometallurgy and hydrometallurgy.

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Oxidized Nickel Ore Heap Leaching | Metallurgist

A different number of circulations of leaching solutions was used during leaching with the aim of increasing the nickel content. A dependence is shown in Fig. 3a–c for nickel concentration on the number of circulations leaching solution in stages of 10%, 20%, and 50% nickel extraction in percolator No. 2. A marked increase in nickel concentration due to …

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The Direct Nickel Process

Explore the extraction processes of nickel from laterite ore, including acid leaching, smelting, and the Caron process. Discover the Direct Nickel Process DNi, an atmospheric hydrometallurgical processing route that uses nitric acid …

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Review on hydrometallurgical processing technology of …

In industry, the extraction of nickel from laterite min-erals is carried out by such processes as: Caron process, high-pressure acid leaching (HPAL), atmospheric acid leaching (AAL …

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Valorization of Solid Residue from the Lateritic Nickel Ore Leaching

An alternative laterite nickel ore processing using sulfuric acid as a leaching agent to produce class 1 nickel as a raw material for electric vehicle batteries produces natrojarosite residue as a ...

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Kinetics Study of Leaching Ore Nickel Laterite Using Hydrochloric …

Leaching of nickel laterite ore at atmospheric pressure is a leaching method that can be operated at >100⁰C temperatures in an atmospheric pressure, which is applicable to a low-grade laterite ore.

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Roasting and Leaching Behavior of Nickel Laterite Ore

Several hydrometallurgical methods have been investigated to improve nickel leaching from laterite ores containing low nickel grades, such as high pressure acid leaching …

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How is nickel extracted from its ores

Nickel is extracted from ores using froth flotation for sulfides, yielding 15-20% nickel matte, and high-pressure acid leaching for laterites. Introduction to Nickel and Its Ores Nickel is a tough, shiny metal commonly used in alloys and plating, and it is most often extracted from two different kinds of nickel ores: sulfides and laterites. Combining, […]

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Nickel and its extraction | PPT

HYDROMETALLURGICAL APPROACHES: (Cu₈Ni₁₆Fe₁₀)→Limonite (FeO(OH).nH₂O) • Solvent Extraction – Electrowinning approach to lateritic ore beneficiation, is a hydrometallurgical method that …

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Recovery of nickel and cobalt as MHP from limonitic ore leaching

Kinetics analysis of atmospheric agitation leaching of limonitic nickel ore in sulfuric acid by incorporating the effect of particle size distribution in shrinking core model. AIP Conf. Proc. (February 2024) Leaching of nickel from Pomala's reduced limonitic laterite using sulphuric acid.

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Pressure acid leaching of nickel laterite

Pressure acid leaching of nickel laterite; Open Collections. UBC Theses and Dissertations. Featured Collection. ... With a 30% pulp density slurry treated at 260°C, with acid/ore = 0.19, nickel and cobalt extractions reached 96% within 15 minutes as goethite and maghemite had completely dissolved. Hydronium alunite was detected by XRD in the ...

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Nickel Laterite Metallurgy

The equipment of atmospheric pressure leaching technology of laterite-nickel ore is relatively simple, but because a large amount of iron enters the solution during leaching, the process becomes complex, which affects the recovery of nickel and cobalt. The process is not better than HPAL method, and only a few research and industrial ...

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CN118479437A

The invention provides a method for preparing ferric phosphate from laterite-nickel ore and phosphorite in a short process, which realizes that a nitric acid leaching system is adopted from the laterite-nickel ore and the phosphorite, reduces the raw material and auxiliary material cost of phosphoric acid purification, shortens the process of phosphoric acid purification to directly …

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Processing of Nickel Laterite Ores on the Rise

Image: Agglomerator for a nickel ore heap leaching operation in SX-EW. Once agglomerated, ore is piled onto a heap, which is then irrigated with the leachate and allowed to sit for a pre-determined amount of time so the leachate can work its way to the bottom of the heap where it is collected in a pond. ...

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Bioleaching of Lateritic Nickel Ores | SpringerLink

Pressure acid leaching has been applied to the Caron process to reduce high-energy consuming phases in direct ore leaching. Direct leaching eliminates the need for drying and reduction steps, which then leads to energy savings (Buyukakinci, 2008).The acceptable nickel content in this method is 1–5% (Dalvi et al., 2004).Also, the crushed ore is dissolved directly with sulfuric acid …

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Extraction of Nickel from Oxidized Nickel Ores by Heap Leaching

A characteristic feature of serpentine oxidized nickel ores (ONO) of the Serov deposit (≈ 1 wt.% Ni) is the increased content of iron and magnesium. The main nickel-containing phases are lizardite, antigorite, clinochlore and iron oxides with the nickel content varying from 1.6 to 9.2 wt.%.Heap (percolation) leaching with aqueous H2SO4 solutions was used for …

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Leaching of nickel from a secondary source by sulfuric acid

Bartolozzi et al. [14] described a hydrometallurgical process for the recovery of nickel and cadmium from Ni-Cd spent batteries. After the primary treatment (grinding, drying, mechanical separation), leaching of powder obtained from primary treatment was conducted with H 2 SO 4 and H 2 O 2 at pH = 0.3 for 60 min at 60 °C. As a result, 98% nickel was recovered …

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Recovery of nickel and cobalt as MHP from limonitic ore leaching

The literature refers to the application of alkali roasting as pretreatment in laterite ore leaching to increase nickel recovery. Thus, this study aims to apply the combination method of alkali roasting and leaching to extract nickel from limonite ore (1.33% Ni, 46.61% Fe) from the Southeast Sulawesi region. Three alkali compounds were included ...

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Research article Kinetics study of leaching ore nickel laterite …

The laterite nickel ore leaching using the AL method in hydrochloric acid media has been studied by several researchers (Astuti et al., 2016; Li et al., 2018, 2020; Mystrioti et al., 2018; Permana et al.2, 02 0; Top et al., 2020). Li et al.'s (2019) in their research on …

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High pressure acid leaching of a refractory lateritic nickel ore

In this study, the leachability of Çaldağ lateritic nickel ore under high pressure acid leaching (HPAL) conditions was investigated. Several HPAL parameters were tested in a comparative manner since in many cases, the extraction efficiencies of Çaldağ ore sample were more than 90% for nickel and cobalt. After the optimization of the process ...

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Characterization of fluidized reduction roasting of nickel laterite ore

Fluidized reduction roasting is an efficient metallurgical technique. However, its application to nickel laterite ore has rarely been reported. In this paper, the effects of reduction temperature, reduction time, CO concentration, and material particle size on the roasting characteristics of ferronickel fluidization reduction were investigated. Combined with X-ray …

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Leaching Kinetics of Limonite-Type Laterite Nickel Ore from

The leaching behavior of nickel and iron in limonite-type laterite nickel ore was studied through ammonium hydrogen sulfate atmospheric leaching. The leaching temperature, ammonium bisulfate concentration, reaction time, and acid excess rate during the nickel dissolution process were optimized using the response surface methodology (RSM) …

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Processing of Nickel Laterite Ores on the Rise

SX-EW, or the Solvent Extraction – Electrowinning approach to lateritic ore beneficiation, is a hydrometallurgical method that relies on leaching, …

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