Since, the laterite ore usually contains Fe which has magnetic properties, the concentration of Ni is not an easy task. In order to enable the selective concentration of nickel by magnetic separation, the calcination of laterite was carried out prior to the magnetic separation. The aim was to alter the crystalline structure of Fe species and ...
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i. Treatment of Laterite nickel ore. 20 g laterite nickel ore was mixed with 100 mL of 5 M sulfuric acid in a 3-necks flask. The leachate and leaching residue was obtained. ii. Preparation of magnetic particles. The sodium sulfite solution was added into the above leachate for reduction of ferric ions to ferrous ions.
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An application of magnetic separation in non-ferrous material has been reported by Geldenhuis to recover nickel from flue dust using wet low intensity magnetic separator.5) The last two studies above show that nickel and iron can be easily recovered by using low intensity magnetic separator, indicating that both elements have high magnetic ...
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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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In this paper, changes, and transformations of laterite nickel because of the calcination process, results of beneficiation method with alone magnetic separation in comparison with a calcination …
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Nickel laterite ore is a typical polymetallic co-associated mineral resource, ... excellent magnetic properties, ... saprolite laterite ore is calculated according to the following Eq. (1). ...
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The process of deep reduction and magnetic separation was proposed to enrich nickel and iron from laterite nickel ores. Results show that nickel–iron concentrates with nickel grade of 6.96%, nickel recovery of 94.06%, iron grade of 34.74%, and iron recovery of 80.44% could be obtained after magnetic separation under the conditions of reduction temperature of …
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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 …
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In this study, a low-grade nickeliferous laterite ore was first calcinated and then processed by using a wet magnetic separator in order to recover nickel. Since, the ore contains both Ni and Fe, the calcination of laterite is effective in altering the crystalline structure of Fe species and therefore its magnetic properties, which in turn enable the selective concentration …
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The specific conditions employed were a reduction temperature of 1275 °C, a reduction time of 50 min and a carbon-containing coefficient i.e., the ratio of carbon in …
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The chemical properties of nickel laterite sample show that during the calcination process, Ni-O, Fe-O, and MgO bonds fracture prior to Si-O bonds [22]. It means that during the reduction of nickel laterite, Ni2+ and Fe2+ are reduced to metallic iron and nickel and Ni-O and Fe-O bonds fracture, which destroys the lattice of hematite.
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In this paper, a solid-state metalized reduction and magnetic separation process was proposed to enrich Ni and Fe from a low-grade laterite nickel ore with Ni 0.98% and Fe 6.99%. The different parameters on the …
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1. Magnetic properties of laterite nickel ore. Laterite nickel ore is mainly composed of minerals such as nickel oxide and iron oxide, which will be converted into magnetic metal nickel and iron during reduction roasting.
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Nickel laterite ore is used to produce nickel metal, predominantly to manufacture stainless steel as well as nickel sulfate, a key ingredient in the batteries that drive electric vehicles.
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selective solid-state reduction followed by magnetic separation. The key issues in the selective reduction of nickel oxides over iron oxides and the growth of newly-formed ferronickel grains (particles) were primarily discussed, and the related fundamentals such as thermodynamics, reduction/sulfidation behaviors of nickel and iron oxides
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The Feronikeli complex, located in Glogovc of Kosova, consists of open cast mines with estimated reserves of 24 Mt of laterite ferronickel ore with an average Ni+Co content of 1.25 %, and a large ...
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For saprolitic laterite ore, nickel and iron are difficult to concentrate by physical beneficiation due to the low nickel and iron content [15] and isomorphic goethite or serpentine crystalline ...
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Keywords Nickel laterite · Ferronickel · Magnetic separation · Separation eciency · Stainless steel Introduction Nickel (Ni) is the 24th most abundant element in the Earth's ... ductility, ease of alloying, catalytic properties, and complete recyclability [3, 4]. Until 2023, Ni has been extensively used in stainless steel (65%), batteries ...
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For the last 5 years, the Philippines has been a major supplier of nickel (Ni)-laterite ore and this trend is expected to increase in the future as the demand for Ni and other critical metals increase due to the clean energy transition [72] (WBG, 2020). According to the United States Geological Survey (USGS), the Philippines produced 370,000 metric tons of Ni in 2021, …
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The acid-leaching tailings of laterite nickel ore are a hazardous waste generated by the laterite nickel ore industry [1], [2], [3]. As global demand for nickel continues to rise and nickel sulfide resources decrease, the extraction of nickel resources from laterite nickel ores the main development trend of the global nickel industry in the coming years [4].
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With the continuous depletion of high-grade nickel ores such as millerite and niccolite, nickeliferous laterites have become the major source for the production of nickel metal. However, only 42% of the world's production of nickel comes from laterites, since the concentration of Ni is relatively low (ca. 2 wt.%). In addition, other metals, such as magnesium, iron and silicon can …
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Results show that nickel–iron concentrates with nickel grade of 6.96%, nickel recovery of 94.06%, iron grade of 34.74%, and iron recovery of 80.44% could be obtained after …
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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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We found that ferronickel with a nickel grade of 37.2 wt% could be obtained at a nickel recovery of 95.89% when nickel laterite was reduced at 1200 °C for 25 min, followed by oxidation with CO2 ...
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Energy consumption (kJ/ kg-laterite) Calcination process Magnetic separation 0.0 536.8 4.2 2.1 Estimated cost of processing (USD/kglaterite) 8.55 10 1.09 10 5 2 Estimated profit (USD/kg-laterite) 0.11 0.13 Fe species and therefore its magnetic properties, which in turn enable the selective concentration of nickel by magnetic separation.
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Since, the ore contains both Ni and Fe, the calcination of laterite is effective in altering the crystalline structure of Fe species and therefore its magnetic properties, which in turn enable the ...
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Sulfates have more stable properties and have great potential for development. Chang et al.(Chang ... substances such as fluoride and cyanide generated from the aluminum electrolysis industry for the reduction roasting-magnetic separation of nickel laterite ore. In some studies, biomass carbon is also used as a reductant to reduce nickel ...
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Nickel (Ni)-laterite mining is a major industry in the Philippines but is generating large amounts of Ni-laterite mining waste (NMW) that threatens surrounding water bodies due to siltation.To repurpose this waste as magnetic iron (Fe)-based adsorbent, a three-step extraction-reduction-coprecipitation approach was developed, and the adsorption properties of …
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Upgrading nickel laterite ores to increase their nickel content would enable laterites to be treated using simpler technologies and/or reduce the acid requirement and waste generation if the ores are leached. ... Roasting also leads to an increase in its magnetic susceptibility as the dehydrated iron oxides having stronger magnetic properties ...
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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% ...
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