Techniques are disclosed concerning applied magnetic field synthesis and processing of iron nitride magnetic materials. Some methods concern casting a material including iron in the presence of an applied magnetic field to form a workpiece including at least one ironbased phase domain including uniaxial magnetic anisotropy, …
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@article{Xu2023ApplicationOC, title={Application of Coal-based Direct Reduction-Magnetic Separation Process for Recycling of High-Iron-Content Non-Ferrous Metallurgical Wastes: Challenges and Opportunities}, author={Xianqing Xu and Zheng-qi Guo and De‐qing Zhu and Jian Pan and Cong-cong Yang and Si-wei Li}, …
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This chapter first introduces the principles and recent advances in magnetic separation technology in processing iron ore, followed by examples of flow sheets for …
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The starting powder and the specimens with different processing parameters were characterized by a Philips X-ray diffractometer using Cu K α radiation (λ=0.154 nm). The primary optic was equipped with Soller slits (0.04 rad); an anti-divergence slit (1°) and the secondary optic was equipped with a receiving slit (0.15°), Soller slits (0.04 rad), a …
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Neo magnets are manufactured by two processes: direct combination of elements (neodymium, iron and boron) to form the ferromagnetic phase (Nd 2 Fe 14 B) and controlled addition of boron to the neodymium-iron master alloy. Both electrochemical and metallothermic processes have been employed to prepare the master alloy.
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SEM images of the synthesized magnetic nanoparticles (C-Fe 2 O 3) were carried out to identify the morphological structure, particle size, and surface distribution as shown in Fig. 3.It shows that the C-Fe 2 O 3 has good porosity and a high adsorption capacity, from which it can be deduced that the structure is uniform. Also, white dots …
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Different processing parameters including the content of borosilicate, the amount of compaction pressure and the size of iron particles have been evaluated through the study of microstructure and ...
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In this process, metallurgical solid waste is converted to sponge iron using CBDR, and subsequently, magnetic separation is carried out to recover the metallic iron from solid wastes. And the non-ferrous oxides would also be reduced to a metallic phase and combined with metallic iron to transform alloy, such as Fe-Cu alloy, Fe-Ni alloy, Fe …
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Intensity Magnetic Separators) commonly use an alloy of neodymium, iron, and boron (NdFeB). Magnetic separation process Magnetic separation technology can roughly be divided into three classes of magnetic intensity i.e., low, medium, and high, all depending on the characteristics of the minerals subjected to magnetic processing:
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Figure 22.7 An unmagnetized piece of iron is placed between two magnets, heated, and then cooled, or simply tapped when cold. The iron becomes a permanent magnet with the poles aligned as shown: its south pole is adjacent to the north pole of the original magnet, and its north pole is adjacent to the south pole of the original magnet.
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Magnetic roasting is a thermally-driven, physicochemical process that selectively transforms weakly magnetic iron ores into strongly magnetic magnetite …
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The Influence of Sample Processing Methods on Magnetic Properties. Figure 1 shows the comparative data of iron loss P 1.0/400 of NOES 35WV1900 under two processing methods of laser cutting and plate cutting in 20 groups. The measurement of iron loss for NOES mainly limits two parameters, one is the magnetic induction and the …
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As a result of dry magnetic separation at about 750 Gauss magnetic field conducted with -0.212+0.106 mm size fraction under optimum conditions, a magnetite concentrate assaying 54.41% Fe was ...
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strong magnetic iron oxide, magnetite (Fe3O4), and hence to improve iron recovery ratio during magnetic separation.9 12 The process of reduction roasting is carried out under reducing atmosphere ...
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2.4. Beneficiation methods. Beneficiation is a process where ore is reduced in size and valuable minerals are separated from the gangue minerals. Separation of valuable minerals from gangue minerals can be efficiently achieved by taking advantage of the differences in physical, surface, and magnetic properties.
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An iron-based soft magnetic composite with Fe3O4-MnZnFe2O4 insulation coating has been prepared by powder metallurgy method. This work investigated the microstructure and magnetic properties of Fe ...
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Iron processing - Ores, Smelting, Refining: Iron ores occur in igneous, metamorphic (transformed), or sedimentary rocks in a variety of geologic environments. ... Magnetic techniques also are used. The upgraded ore, or concentrate, is in the form of a very fine powder that is physically unsuitable for blast furnace use. It has a much smaller ...
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Selective reduction of weakly magnetic iron without wüstite formation using HMPT technology. •. Unaffected flotation recovery of valuable minerals such as rare …
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They described a two-stage process where the ore was ground to a particle size of ~ 25 µm, the primary magnetic concentrate was dewatered and processed under the same conditions which generated a product containing 67.07% Fe at a …
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Ferromagnetism is the basic mechanism by which certain materials (such as iron) form permanent magnets. This means the compound shows permanent magnetic properties rather than exhibiting them only in the presence of a magnetic field (Figure 14.2.1 ). In a ferromagnetic element, electrons of atoms are grouped into domains in which each …
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Since our founding, STEINERT has been a pioneer in mechanical mining separation and processing, e.g. ore sorting equipment. As a leading global manufacturer of advanced sorting and magnet-based systems, we are continually developing new high-tech solutions to meet the challenges of our customers: when it is necessary to protect equipment from ...
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We use the newly designed two-colour microwave pump–probe setup on the sample shown in Fig. 1a, which is a single-crystalline magnetic insulator Y 3 Fe 5 O 12 (yttrium iron garnet (YIG)) disc ...
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In the recent past, iron ore resources from Brazil consisted of relatively high-grade iron ore, commonly processed via multi-stage crushing/screening, gravimetric concentration, magnetic separation, and reverse flotation. However, the high-grade iron ore reserves are in decline, resulting in the need to process the lower grade itabirite iron …
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Pyrite cinder (PyC) is an iron-enriched tailing.Suspension magnetization roasting(SMR) technology can convert hematite into magnetite, the magnetic properties of the product have been improved, and then through the magnetic separation to complete the separation of magnetite and gangue. SMR consumes less energy than the direct …
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The FMS process significantly increases the magnetic force on the ultrafine iron ore in the form of hydrophobic flocs in a magnetic field, thus the ultrafine particles can be picked up effectively ...
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3.3. Beneficiation of Arsenic and Iron Minerals with the CMR-LMS Process. The roasted sample contains magnetic iron minerals that experienced a magnetic reduction. The XRD patterns of the sample roasted at 800 °C for 50 min with 10% coke at an alkalinity of 2.42 are given in Figure 10. The phase analysis of the roasted sample reveals its ...
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Transforming iron ore processing – Simplifying the comminution and replacing reverse flotation with magnetic and gravity separation Author links open overlay panel Armando F. d. V. Rodrigues a b, Homero Delboni Junior b, Klaydison Silva a d, James Zhou c, Kevin P. Galvin c, Lev O. Filippov d
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Typically, two main strategies are used to vary the size of the NPs. The first one is referred the 'seed mediated growth' and implies the addition of iron precursor to pre-existing nuclei. This strategy has been used by Sun for the synthesis of various-sized NPs (4 nm, 8 nm, 12 nm and 16 nm) starting from 4 nm seeds.
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Magnetic separation technology plays an important role in upgrading such low-grade iron ores, because the magnetic separation process possesses the combined advantages of large capacity and low operating cost, as well as being environmentally friendly. This chapter first introduces the principles and recent advances in magnetic …
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