The reduced ore was then upgraded by magnetic separation, 75 per cent of the total mass being rejected as tailings, and a high grade nickel concentrate, assaying 5.1 per cent Ni and 82.66 per cent ...
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PDF | On Mar 11, 2019, Sait Kursunoglu and others published Hydrometallurgical Processing of Nickel Laterites—A Brief Overview On The Use of Solvent Extraction and Nickel/Cobalt Project For The ...
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The sulphidation of a nickeliferous lateritic ore was studied at temperatures between 450 and 1100 °C and for sulphur additions of 25–1000 kg of sulphur per tonne of ore. The experiments demonstrated that the nickel could be selectively sulphidized to form a nickel–iron sulphide. It was found that both the grade and the sulphidation degree ...
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The production of ferronickel concentrate from low-grade nickel laterite ore containing 1.31% nickel (Ni) was studied by the non-melting reduction magnetic separation process. The sodium chloride ...
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The nickel laterite ore was dried at 120 °C for 2 h in an oven and ground to passing 0.074 mm. The ground nickel laterite was mixed to homogeneously with pulverized coke. ... The separation between metal and slag can be enhanced by increasing the quaternary basicity [(m CaO + m MgO)/(m SiO2 + m Al2O3)] from 0.40 to 0.60. …
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Lateritic ore contributes to 70% of total nickel resources. However, due to its low grades, and comparatively higher impurity constituents, it requires specific preprocessing steps prior to utilization. The present article reviews the insight into the available hydrometallurgical approaches for treating laterite ores and the separation of ...
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The optimal separation conditions were settling temperature 1300°C, MgO content 8 wt.%, FeO/SiO2 1.55, and B2O3 content 2.4 wt.%. The mechanism demonstrated that adding B2O3 could significantly reduce the impact of low-quality nickel ore on smelting. Moreover, the separation and recovery of the matte and slag were both successful.
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ABSTRACT In Part II, the correlation between Fe–Ni grain growth and characteristic fusion temperatures of the Na2SO4–laterite mixtures, and phase transformations of the reduced pellets were investigated. For the mechanism of sodium sulphate, Na+ is able to liberate the hosted nickel and iron within lizardite, while SO42– …
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In addition to nickel, limonite ore typically contains 0.1-0.2% cobalt, 0.5-5% magnesium oxide and 40-50% iron.1 Leaching of limonite ore in acid solutions such as sulfuric, hydrochloric and nitric acid would result in a pregnant solution that contains nickel, cobalt, iron, magnesium and some other elements in lower concentrations such as ...
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The results show that with the addition of laterite nickel ore, the basicity of raw materials is reduced, the precipitation and aggregation of metal particles are promoted, the separation effect ...
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1. Introduction. Nickel (Ni) and cobalt (Co) are amongst the critically rare metals due to their large industrial usage and vital application in rechargeable batteries [1], [2], [3].The laterite ores are accounted for 70% of Ni reserves worldwide but 60% of the global Ni production is still contributed by the sulfide ores [4], [5].Due to the depletion of …
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The main source of nickel has gradually become the recovery of ferronickel concentrate from low-grade laterite nickel ore. In this work, high-grade ferronickel concentrate was prepared by a reduction roasting-magnetic separation process, and low-grade ferronickel concentrate and CaF 2 were used as composite additives to promote …
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Selective nickel-iron separation from atmospheric leach liquor of a lateritic nickel ore… 215 In this context, the aim of this study was to provide an enhancement in selective nickel-iron separation from atmospheric leach liquor of a lateritic nickel ore using the para-goethite precipitation method. Experimental
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The surface zone of nickel laterite ore is generally considered as residue. However, because of the depletion of ore sources and the increase in demand, this previously discarded zone may now be processed economically for nickel and cobalt. ... Flett DS (2004) Cobalt-Nickel separation in hydrometallurgy: a review. Chem Sustain …
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A new extraction technology of chlorination roasting with a mixture of MgCl 2 ·6H 2 O and NaCl was investigated to co-extract nickel and copper from low-grade nickel ores. The effects of some key factors on the extraction of nickel, copper, and iron were studied, and the results show that,when the roasting temperature is 850°C, the roasting …
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For the limonite in laterite nickel mine, the nickel bearing magnetite concentrate with nickel grade of 1.98% and recovery rate of 88.42% can be obtained by reduction roasting magnetic separation ...
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Nevertheless, when reduction roasting–magnetic separation is used to treat laterite nickel ore with low nickel content, increasing the dosage by approximately 8–20% inevitably reduces equipment life and increases cost (Liu et al.,2021). Therefore, improving the grades and recoveries of iron and nickel is of major significance.
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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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Request PDF | Selective nickel-iron separation from atmospheric leach liquor of a lateritic nickel ore using the para-goethite method | The presence of iron in pregnant leach solutions (PLS) is a ...
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Nickel is widely used in industrial processes and plays a crucial role in many applications. However, most of the nickel resource mainly exists as nickel oxide in laterite nickel ore with complex composition, resulting in difficulty in upgrading the nickel content using physical separation methods. In this study, high-grade ferronickel concentrates …
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The refinery at Fort Saskatchewan was one of the first to utilise ammonia as a leaching reagent (Cooper and Mihaylov, 1997).The ammoniacal process involves pressure leaching of the nickel concentrate and matte with ammonia and oxygen in a series of autoclaves operating at 105–120 °C (Crundwell et al., 2011).This process aims to …
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Separation and recovery of iron and nickel from low‒grade laterite nickel ore using reduction roasting at rotary kiln followed by …
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In order to control the effective separation of nickel and cobalt, their separation coefficient is calculated according to Formula ().It is found that the maximum separation coefficient of nickel and cobalt is 1.2 × 10 4 at the extraction ratio of 1:1. Under this extraction ratio, the more extraction amount of cobalt, the less extraction amount of …
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Attempts to float the ore without some form of size separation invariably give disappointing results. Pulps tend to be viscous and difficult to disperse, necessitating the use of low pulp densities (15–20% solids), high power inputs for agitation and large reagent additions. ... Nickel ore treatment at Kambalda Nickel Mines of Western Mining ...
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The self-reduction, fine grinding, and magnetic separation of nickel laterite ore in the presence of three types of additive were examined. Nickel laterite ore with 7.88 wt% coal, 12 wt% calcium ...
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The tested ore in this study was of limonitic nickel laterite type which contains low nickel and high iron as shown in Table 1. This laterite is characterised by lower nickel grade of 0.97 per ...
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1.. IntroductionAbout 60% of the current worldwide production of nickel is derived from sulphide ores and the rest comes from nickel laterites (Sudol, 2005).However, about 70% of the nickel reserves are present in laterite deposits (Dalvi et al., 2004).As a result, there is growing interest in improving the technology for extraction of nickel (and …
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Ore characterisation showed that the ore is a saprolitic laterite with nickel present in lizardite. Leaching tests showed that nickel and cobalt could be leached from the ore at atmospheric pressure.
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The low-grade nickel laterite ore used in this study was successfully upgraded through selective reduction by industrialized rotary kilns followed by magnetic separation. The results indicated that both iron metallization extent and nickel metallization extent showed obvious linear correlation. In addition, rational roasting temperature and …
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Nickel is widely used in industrial processes and plays a crucial role in many applications. However, most of the nickel resource mainly exists as nickel oxide in …
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