excellent cobalt-nickel separation primary leach liquor by Cyanex 272. However, manganese extraction from the leach liquor along with cobalt could not be avoided, thus increasing the cost of the process. For sulphide ores, there is another alternative; if the ore can be concentrated by flotation, matte smelting is used instead of leaching.
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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 nickel. It realizes the effective separation of nickel and cobalt. Therefore, the best extraction phase ratio is regarded as 1:1.
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Flotation separation Valuable minerals in an ore can be separated from each other, and from worthless gangue minerals, by the froth flotation process. ... The recovery of nickel from solution, following leaching of either type of nickel ore, can be achieved by hydrogen reduction, as discussed above, or by electrolysis. Outokumpu uses the latter ...
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In anticipation of future demands, a comprehensive understanding of the chemical and mineralogical characteristics of nickel-bearing minerals is a prerequisite to devising effective nickel beneficiation methods. Of particular importance are markers in the mineralogy of the flotation concentrate that inform beneficiation strategies to improve concentrate grades, …
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In this research, efficient iron enrichment was innovatively proposed through "mineral phase transformation - magnetic separation" for the acid-leaching tailings of laterite …
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Li et al. (2010) investigated the effects of selective reduction and magnetic separation of nickel laterite ore containing 0.97% nickel to produce a high grade nickel concentrate. With regards to ...
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ABSTRACT In this study, we investigated a nickel laterite ore with Ni content of 1.56 wt% and a red mud with Fe content of 20.98 wt%, the main Ni-bearing mineral in the nickel laterite ore was nickel-lizardite, and the main Fe-bearing mineral in the red mud was hematite. A novel process of roasting and magnetic separation was purposed to extract nickel and iron …
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In this study, the laterite nickel ore was treated by basic hydrothermal method, and the product was dissolved directly in the form of sodium silicate. ... Separation and recovery of iron and nickel from low-grade laterite nickel ore by microwave carbothermic reduction roasting[J]. J Market Res 9(6):12223–12235. CAS Google Scholar
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A novel process for simultaneously extracting Ni and Cu from mixed oxide-sulfide copper-nickel ore with highly alkaline gangue via FeCl 3 ∙6H 2 O chlorination and water leaching
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The sticking phenomenon between molten slag and refractory is one of the crucial problems when preparing ferronickel from laterite ore using rotary hearth furnace or rotary kiln processes. This study aims to ameliorate sticking problems by using silicon dioxide (SiO2) to adjust the melting degree of the briquette during reduction roasting. Thermodynamic analysis …
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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. ... Yasri NG, Separation of nickel from cobalt using electrodialysis in the presence of EDTA, Journal of Applied Electrochemistry, no.4, 30 ...
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Low-grade saprolite nickel laterite, characterized by complicated minerals composition and fine-grained and complex dissemination, was commonly treated with a low recovery efficiency of Ni and Fe by conventional methods. Hence, an improved direct reduction and magnetic separation process was proposed. Meanwhile, the mechanisms on the …
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metals Article Preparing Ferro-Nickel Alloy from Low-Grade Laterite Nickel Ore Based on Metallized Reduction–Magnetic Separation Zhihao Wang ID, Mansheng Chu *, Zhenggen Liu, Hongtao Wang, Wei Zhao and Lihua Gao School of Metallurgy, Northeastern University, Shenyang 110819, China; wangzhihao361@163 (Z.W.);
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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 was used as additive and coal as a reductant. The effects of roasting temperature, roasting duration, reductant dosage, additive dosage, and grinding time on the …
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On the basis of their importance, global average recycled content (RC) data (Worrell and Reuter, 2014) and their wide range of applications, transition metals can be placed at the top among all the elements.Among various transition metals, cobalt (Co) and nickel (Ni) are extensively used in metallurgical, chemical, alloy, battery and mining industries (Crundwell et …
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Nickel ore preparation involves a series of processes to prepare the ore for further processing, including crushing, grinding, and classification. These steps help to reduce the ore size, increase the surface area for …
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Abstract In this study, magnesia–nickel silicate ore was investigated, which contained 0.83% Ni and antigorite, chlorite, magnetite (Fe3O4), quartz, and mica as the main minerals. Chloride roasting and magnetic separation were used to treat the ore. The addition of red mud enhanced the transformation of nickel silicate to a strongly magnetic mineral mainly …
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ores is through the production of nickel matte after enriching the nickel content of the ore. This is com-monly carried out by magnetic separation, Sotation, or a combinationof both after the ore is comminuted to below 200 m in size. The enrichment depends upon the degree of rejection of the other sulRde and non-sulRde gangue. The maximum grade ...
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Concentrating the nickel ores usually takes place close to the mine site and involves chemical and physical processes to crush the ore and separate the nickel-bearing and gangue minerals by flotation in the case of sulfidic …
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nickel in laterite ores. The effect of ore mineralogy on choosing the best strategy to upgrade nickel will be discussed. The findings of this project will help to unlock a ... separation resulted in upgrading nickel from 0.9% to 1.1% at 57% recovery (Aral, 2013). Furthermore, Muir and Johnson (2006) demonstrated that in physical
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Nickel, a valued metal, mainly exists as nickel oxide in laterite nickel ore. Furthermore, a large part of the laterite nickel ore is low-grade saprolitic ore. In this paper, a research on preparing ferro-nickel alloy from low-grade saprolitic laterite nickel ore using metallized reduction-magnetic separation was studied. In the research, the carbothermic …
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Cobalt and Nickel Separation in Nitric Acid Solution by Solvent Extraction Using Cyanex 272 and Versatic 10 ... 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 ...
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In nature, nickel (Ni) mainly exists in sulfide ore and oxide ore. Nickel oxide ore gets its name for it is a kind of laterite ore with high iron content. Nickel laterite, as the main land-based nickel resource, has total resource of 1.26 billion tons with an average nickel content of 1.28%, accounting for 72% of the total nickel resources.
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Copper Nickel Separation Challenges and Flowsheet ... • A SAG mill would be recommended when an ore has a mixture of both hard and soft material. A t a value between 0.24 and 0.35 is classified as 'hard'. • This indicates that for future SMC testing, that a composite that
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Flotation of nickel sulfide ore is a key process in the separation and subsequent utilization of nickel. However, efficient separation of nickel is hindered by the presence of magnesium silicates (typically serpentine) [2] that caused hetero-aggregation and entrainment.
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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. …
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to 1300°C, the phase of saprolitic nickel ore changes into a complex mineral. The mineral is dominated by olivine (Mg 0.5Fe 0.5) 2SiO 4. 29) 2.3 Direct reduction of laterite nickel ore in industrial scale Most laterite nickel ore processing is carried out using Elkem process. The Elkem process uses Rotary Kiln and
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The selective reduction method at a low-temperature process, which continued with the lateritic nickel ore's magnetic separation process, has been developed [8].Metalization of iron is inhibited, increasing the nickel content in concentrate (magnetic particle) using additives, such as sodium sulfate, sodium carbonate, and sodium chloride [9], [10].
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In some cases, nickel ore may undergo beneficiation processes to improve its quality and increase the concentration of nickel. Beneficiation methods can vary depending on …
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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 prolonged grinding …
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