Nickel usually occurs in nature as sulphide or oxide forms, and its concentrates commonly contain different proportions of iron sulfides (pyrite and pyrrhotite) and Ni (pentlandite). The nickel extraction from low-grade ores has been conducted in the biohydrometallurgical process employing chemolithoautotrophic microorganisms …
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This study provides a novel method for the extraction of nickel from pentlandite by bioleaching at elevated pH values. pH-stat batch stirred tank reacting system. Changes in pH (a) and Eh (b) in ...
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1. Introduction Much of the world's nickel is extracted from the mineral pentlandite which occurs frequently in ores containing pyrrhotite and various non-sulphides some of which contain magnesium. The usual method of extraction is concentration of pentlandite by flotation followed by the production of a nickel matte.
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The decreasing grade of natural ores and increasing environmental burden of industrial residue and metal scrap make recycling a strong driving force of economic ... nickel, extraction, separation, recovery, waste Li-ion, Ni–Cd and NiMH batteries, leaching, name of different extractants etc. ... such as Pentlandite ((Ni,Fe) 9 S 8), Millerite ...
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Nickel extraction from primary resources such as ores/minerals (sulfides, arsenides, silicates, and oxides) including the unconventional one viz., the polymetallic …
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Two significant Ni minerals in sulphide ores are pentlandite [(Ni,Fe) 9 S 8] and nickeliferous pyrrhotite. There are several different techniques that can be used in the extraction of nickel and cobalt from various ore minerals. ... Nickel, Cobalt and Copper extraction from low grade nickel ore sample at 200 g/L acid, 3 g/L ferric, 40% solids ...
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Pentlandite, a nickel and iron sulfide mineral, the chief source of nickel. It is nearly always found with pyrrhotite and similar minerals in silica-poor rocks such as those at Bushveld, S.Af.; Bodø, Nor.; and Sudbury, Ont., …
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The main methods have been extensively reviewed for nickel extraction from nickel sulfide ores which maybe are potentially applicable to provide new ideas for smelting technology innovation of nickel and even other similar metals. ... The controlled oxidation of feed sulfide minerals demonstrated that the hydrothermal oxidation of pentlandite ...
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The invention discloses a simple method for extracting pentlandite monominerals. The method is characterized in that copper-nickel sulphide ore is used as a raw material, and a magnetic field of which the strength gradually increases is applied to the copper-nickel sulphide ore through a permanent magnet, so as to achieve stage-by-stage magnetic …
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In this study, segregation roasting and magnetic separation are used to extract nickel from a garnierite laterite ore. The garnierite laterite ore containing 0.72% Ni, 0.029% Co, 8.65% Fe, 29.66% MgO, and 37.86% SiO2 was collected in the Mojiang area of China. Garnierite was the Ni-bearing mineral; the other main minerals were potash …
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Some amounts of magnetite and chromite exist in the ore together with sulphide and oxide type nickel minerals. The ore sample contains 1.32% Ni, 10.79% SiO2, 78.39% Fe2O3, 1.3 g/t Ag, and 1.0 g/t ...
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Abstract Nickel is mostly extracted from sulfide ores, however, laterite ores account for over 60 pct of all nickel resources in the world, and despite its predominance, there is no well-established process to extract nickel from such ores. Nickel in laterites is hosted in many different compounds such as oxides, hydroxides, and silicates minerals. …
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The ore, extracted from the New Caledonian ultramafic soil, is a result of the decomposition of a primal magnesian olivine (Mg, Fe)SiO 4 in the parent rock into clays and phyllosilicates under the ...
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The ore sample used in the experimental work consisted of complex nickel-copper sulphide from Voisey's Bay, Labrador, Newfoundland, Canada. The sample was crushed in a laboratory jaw crusher and screened through a 10-mesh sieve (2-mm aperture) to obtain representative batches of 1 kg and deep-frozen to preserve freshness until use.
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The mineral system characteristics of the Sudbury Ni-Cu-Co-PGE sulfide ore deposits. Peter C. Lightfoot, in Nickel Sulfide Ores and Impact Melts, 2017 Cobalt. Pentlandite is the principal host for the bulk of the cobalt in the Sudbury ores (Naldrett, 1961), and there is a range in Ni/Co ratio depending on whether the pentlandite was formed in a contact or …
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"A new hydrometallurgical process for nickel extraction from a low grade laterite ore such as limonite has been developed by RIST and POSCO. This POSCO Nickel Extraction Process (PosNEP) consists of five main processes: ore reduction using hydrogen as a reductant; acid leaching at atmospheric pressure and temperature; …
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Pentlandite is the most common and abundant mineral used for nickel extraction, accounting for over 60% of worldwide nickel production, mostly from sulfide copper–nickel ore deposits [13,14,15]. …
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Currently, approximately 60% nickel is extracted from nickel sulfide ore, but in recent years, ... Japan with Cu Kα radiation) in Fig. 1 show that the main mineral phases in the matte are pentlandite ((Fe, Ni) 9 S 8), magnetite (Fe 3 O 4), Fe-Ni alloy (FeNi 3) and bornite (Cu 5 FeS 4). Table 1. The chemical compositions of low-grade nickel matte.
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Nickel is mined from laterite and sulfide ores. 3 The choice of the extraction process for nickel depends on the mineral type—more than 60% of the world nickel production derives from sulfidic Ni–Fe–Cu ores and the most important mineral is pentlandite (Fe, Ni) 9 S 8.
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The demand for nickel has been steadily increasing in the 21st century, primarily driven by the rising demand for electric vehicle batteries. Nickel in laterite is associated within silicate in saprolite ore and hydroxide/oxide in limonite ore. Recently, the sulfation–roasting–leaching process has been developed to address the challenges of …
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Pentlandite is one of the major nickel – hosting sulfide minerals. In sulfide flotation, the recovery of pentlandite is often associated with the recovery of nickel. Different nickel recoveries have been observed from various ores (Heiskanen et al., 1991) and, in some cases, from different areas of the same deposit. Besides other factors ...
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The extraction of nickel from ore follows much the same route as copper, and indeed, in a number of cases, similar processes and equipment are used. The major differences in equipment are the use of higher …
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1. Introduction. Nickel is an important strategic metal produced at over 2 million tonnes annually [1].Approximately 60% of all Ni is consumed in the production of stainless steel [2, 3].Currently, Ni is primarily extracted from two types of ores: laterites and sulfides [[4], [5], [6], [7]].Although sulfide ores account for a smaller fraction of global Ni …
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Ores Sulfides. Canadian ores are sulfides containing nickel, copper, and iron. The most important nickel mineral is pentlandite, (Ni, Fe) 9 S 8, followed by pyrrhotite, usually ranging from FeS to Fe 7 S 8, in which …
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The mixture of the nickel concentrate and metallic iron powder was heated at 950 °C followed by slow cooling to 750 °C and over 90% of nickel was extracted from pentlandite into the ferronickel alloy phase. The alloy contained 20–30 wt% nickel and had a characteristic grain size of 40–50 μm. Keywords. Ultramafic nickel sulfide ore
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The conventional nickel smelting and refining is the dominant strategy for nickel production from the sulfide nickel ores. The main disadvantages are the significant amount of SO 2 emissions during smelting and complex refining processes. In this paper, the authors investigated a solid-state nickel extraction method that recovered nickel …
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Bioleaching of a pentlandite–pyrrhotite–chalcopyrite concentrate resulted in about 60% nickel extraction after about a month. Thermophiles such as Acidimicrobium, …
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In sulfide nickel deposits throughout the world, pentlandite and pyrrhotite are commonly found together along with varying amounts of chalcopyrite and platinum group minerals (PGMs). The mafic or ultramafic host silicates associated with the sulfide mineralisation commonly exhibit a complex assemblage of magnesium bearing silicates, many of which …
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Nickel's extractive metallurgy is the most complex since there are two major types of ores, laterites, and sulfides, which make this paper a valuable guide by providing an overview …
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Most of the world's nickel is extracted from the mineral pentlandite, (Ni, Fe)9S8, which frequently occurs in ores containing predominantly pyrrhotite and various non-sulRdes, some of which contain … Expand
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Nickel laterite ore characteristics. The chemical content of the ore, determined using ICP-OES and XRF analyses (Table 1), showed that the ore sample has nickel content of 1.73 %. The XRD patterns of the ore are shown in Fig. 1. The XRD pattern has a high background due to absorption of the X-rays by iron because the …
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summarized. Nickel extraction from primary resources such as ores/minerals (sulfides, arsenides, silicates, and oxides) including the unconventional one viz., the polymetallic sea nodules, and ...
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Nickel extraction from primary resources such as ores/minerals (sulfides, arsenides, silicates, and oxides) including the unconventional one viz., the polymetallic sea nodules, and various secondary resources has been examined. Though sulfide ores after concentration are generally treated by the pyro-metallurgical route, most processes for ...
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Synchronous extraction of nickel and copper from a mixed oxide–sulfide nickel ore in a low–temperature roasting system. Journal of cleaner production 177, 371–377 (2018). Article CAS Google ...
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A.3a Flow Sheet for Extraction of Nickel from Pentlandite via Pyrometallurgical Route Nickel concentrate (10% Ni, 2% Cu, impurities: S, Cu, Fe, Co, As, Ag, Pt) Cu slag Slag discard (reduction in S, all Ni and Cu retained as sulfides, preferential oxidation of Matte (50% Ni, 25% Cu) some impurity sulfides) Slag 2FeS + 3O2 = 2FeO + 2SO2 + 932 kJ
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The extraction of nickel (Ni) from sulfide resources commences with flotation to produce a concentrate which is then smelted to produce a nickel-enriched phase called matte, and further refined to produce pure Ni products as well as by-products, such as cobalt (Co), copper (Cu) and precious metals. ... (massive pentlandite …
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