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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This chapter explores alternative leaching technology for nickel, with a particular focus on the direct nickel (DNi) process, nitric acid pressure leach (NAPL), step temperature …
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HPAL (High-Pressure Acid Leaching) is one of the important technologies for extracting nickel and cobalt from nickel laterite ore. In the next few years, some plants using this technology will be ...
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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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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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The subject of this study is leaching process of nickel-bearing laterite ore from Ržanovo, R. Macedonia. The influence of sulfuric acid concentration (0.5, 1 and 3 M H2SO4) on the extracted Ni (%, wt.) was studied. The leaching process …
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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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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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Under atmospheric leaching conditions, the leaching behaviors of nickel and iron in nickel laterite ore are quite similar, with their leaching rates exhibiting a significant linear …
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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 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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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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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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Nickel ore refers to the naturally occurring rocks or minerals that contain significant amounts of nickel. Nickel is a chemical element with the symbol Ni and atomic number 28. ... Over time, prolonged weathering processes cause the leaching and accumulation of nickel and other elements in the soil, resulting in the formation of a lateritic ...
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Laterite ore is a valuable resource due to its high content of metals essential for modern technology, including nickel, iron, and cobalt. However, extracting nickel from laterite ores is challenging due to their complex mineral composition and low nickel concentrations. This study examined the leaching behavior of pre-roasted laterite ore and the effect of roasting on …
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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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The typical AL leaching process involves direct leaching of nickel laterite ores with both inorganic and/or organic acids by either agitation or heap leaching.
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After 548 days of leaching of the first heap, that was the most representative of the ore site, the recoveries of nickel and cobalt were 79.4% and 82.7%, respectively with calculated 528 kg/tonne of dry ore acid consumption (Oxley et al., 2006, Oxley et al., 2007). The resultant pregnant leach solution (PLS) was then treated to produce mixed ...
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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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Key words: leaching, nickel, cobalt, hydrometallurgy, laterites. DOI: 10.17580/nfm.2024.01.03 Review on hydrometallurgical processing technology of lateritic nickel ore for the last 20 years in the world Introduction N ickel with its unique properties [1] is a strategic metal for many modern industrial processes —
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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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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; Mysti 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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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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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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Nickel, cobalt and iron were extracted from Caldag lateritic nickel ore under atmospheric pressure acidic leaching conditions. The following variables were examined to understand their effects on extraction: sulphuric acid concentration, liquid-to-solid ratio, leaching temperature, leaching time, and particle size.
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In this study, the effects of acid/ore ratio (0.1-0.6 g H2SO4/g dry ore), leaching temperature (200–240 °C) and leaching time (30–120 minutes) on the high pressure sulphuric acid leaching of a lateritic nickel ore sample having 1.37% Ni, 0.076% Co and 47.72% Fe2O3 were investigated.
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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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Nickel and cobalt recovery from a low-grade nickel laterite ore, supplied from Çaldag deposit (Manisa, Turkey) were investigated by bio and chemical leaching processes. The fungus, Aspergillus niger was used for biocatalytic leaching experiments.
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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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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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