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2.1 Materials 2.1.1 Nickel laterite ore. The chemical composition of nickel laterite as received from Philippines employed in the study is shown in Table 1.It indicates that the nickel laterite contains 1.29 wt.% Ni, 16.31 wt.% Fe, 32.28 wt.% SiO 2 and 27.38 wt.% MgO with both high Fe/Ni of 12.64 and MgO/SiO 2 of 0.85, while the impurity …
Limonite nickel ore has potency to utilize as raw material for ferronickel or nickel matte, since it has low grade nickel content, thus process development is n. ... Calcination of low-grade laterite for concentration of Ni by magnetic separation," Miner. Eng., vol. 23, no. 4
A slurry containing 100 g of ore in 1 L of water (10 wt%) was prepared for magnetic separation. The magnetic part was initially separated using a current of 2 A (~ 6000 …
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. …
The experimental procedure of the process is shown in Fig. 2.The system consists of a quartz tube, a laboratory-scale tube furnace, a gas supply system, a bar mill, and a magnetic tube [22], [23].First, 30 g of acid-leaching tailings of laterite nickel ore was weighed into a quartz tube and noble gas (N 2) was introduced to exhaust the air from …
Abstract—The experimental research into intensification of copper–nickel ore concentration by flotation and magnetic separation shows that pretreatment of ore before milling by accelerated electrons results in the increased yield of – 0.071 mm size and in enhanced recovery of useful components in the concentrate.
Nickel is malleable and ductile (can be beaten and drawn out into a wire) and is rust-resistant. Nickel is magnetic, although not as strongly as iron. ... Concentration involves crushing the ore and separating nickel-bearing from other minerals using various physical and chemical processing methods. The concentrates …
methods have been employed [7]. Nickel bearing ore is leached with sulphuric acid in an autoclave, followed by the recovery of nickel metal from the solution by electrowinning or hydrogen reduction. A high purity nickel meta l can be produced by this method, and nickel recoveries are typically in the range of 90% to 92% [8].
A tower-like magnetic system comprising eight permanent magnets was installed at the center of a flotation column to separate chalcopyrite and pyrrhotite minerals. A cyclonic flotation was installed within the underpart of the column to separate the pyrrhotite from the gangues. A three-product magnetic flotation column was fabricated …
In this study, the concentration of nickel from low-grade laterite was carried out by using a simple, cost-effective and environmentally-friendly process such as the wet magnetic separation. 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 ...
Ferronickel enrichment and extraction from nickel laterite ore were studied through reduction and magnetic separation. Reduction experiments were performed using hydrogen and carbon monoxide as reductants at different temperatures (700–1000°C). Magnetic separation of the reduced products was conducted using a SLon-100 cycle …
Ultimately, precipitation in restricted areas is key to locally accumulating a significant concentration and volume to generate an ore body (Naldrett, 1999). ... It is important to mention that pyrrhotite, in its dominant form at Nunavik Nickel, is magnetic. Consequently, Ni-Cu lenses of significant size may generate a direct signature on ...
Copper-nickel sulfide ore beneficiation methods. Flotation is primary, magnetic separation & gravity separation are usually as secondary beneficiation methods. 1.5 WASTES AND OTHER MATERIALS ASSOCIATED WITH IRON ORE. EXTRACTION AND ... 1.5.1.5 Gravity Concentration Wastes and...
DOI: 10.1016/J.MINPRO.2012.01.003 Corpus ID: 97937238; Upgrading low nickel content laterite ores using selective reduction followed by magnetic separation @article{Zhu2012UpgradingLN, title={Upgrading low nickel content laterite ores using selective reduction followed by magnetic separation}, author={De‐qing Zhu and Yu Cui …
... The measured rate for the reduction of hematite to magnetite was higher than the reduction rate of hematite to metallic iron. Figure Kim et al. (2010) performed …
Swedish scientist Baron Axel Frederich Cronstedt in 1751 finally isolated nickel from an ore closely resembling kupfernickel. ... The oxide is obtained from nickel ores by a series of treatments including concentration, roasting and smelting of the minerals. ... The metal is a fair conductor of heat and electricity and exhibits magnetic ...
Calcination of low-grade laterite for concentration of Ni by magnetic separation. Miner. Eng. (2010) B. Ma et al. ... Compared with nickel sulfide ore, nickel laterite ore has the characteristics of low nickel content and complex mineralogy, and most of nickel is present as isomorphism hosting in the lattice of some stable mineral phases …
The experimental research into intensification of copper–nickel ore concentration by flotation and magnetic separation shows that pretreatment of ore before milling by accelerated electrons ...
The magnetic separation tailings of saprolite laterite ore containing magnesium processed by roasting and magnetic separation are used as raw materials, and the product of magnesium oxide was obtained by the process of sulfuric acid leaching, removing iron, precipitating magnesium and roasting. The effects of sulfuric acid …
Magnetic properties: Nickel is ferromagnetic, meaning it can be magnetized, and it has a high magnetic permeability, which makes it useful in various magnetic applications. Other properties: Electrical conductivity: Nickel is a good conductor of electricity and is used in electrical and …
metals Article Production of Ferronickel Concentrate from Low-Grade Nickel Laterite Ore by Non-Melting Reduction Magnetic Separation Process Guorui Qu 1,2, Shiwei Zhou 2,3, Huiyao Wang 2,3, Bo Li 1,2,3 and Yonggang Wei 1,2,3,* 1 State Key Laboratory of Complex Nonferrous Metal Resources Clean Utilization, Kunming University of Science …
The chemical element composition of acid-leaching tailings of laterite nickel ore is presented in Table 1. The iron in acid-leaching tailings of laterite nickel ore dissolves and ends up in the tailings after the leaching process, the iron content in acid-leaching tailings of laterite nickel ore was relatively high at 40.89 wt%.
In this study, a process of reduction roasting–magnetic separation of laterite nickel concentrate is proposed. The effects of spent cathode carbon as a reducing …
Under the optimum calcination conditions, the nickel recovery for limonite, saprolite and transition laterite ore could reach 68.5%, 68.9% and 67.3%, respectively, while the nickel contents in magnetic fraction are 3.01%, 3.23% and 3.15% with increasing by 1.82, 2.27 and 2.11 times, respectively.
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 …
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 …
Kim et al. (2010) had investigated the concentration of nickel from low-grade laterite nickel ore (Ni 1.50%, Fe 22.33%) using the calcination process at 500°C for 1 hour followed by wet magnetic ...
The experiments show that high nickel content nickeliferous concentrate containing 6.0% Ni with nickel recovery of 92.1% could be produced with over 75% of the reduced ore, containing low nickel ...
Laterite nickel ore is rich in nickel and iron resources, and the nickel element is extracted in the form of nickel salt. ... Calcination of low-grade laterite for concentration of Ni by magnetic separation. Miner. Eng., 23 (2010), pp. 282-288, 10.1016/j.mineng.2010.01.005. View PDF View article View in Scopus Google Scholar [9]
