Preparation of Fe3O4 particles with unique structures from nickel slag for enhancing microwave absorption properties

Li, Bin; Rong, Taolin; Du, Xueyan; Shen, Yuquan; Shen, Yongqian

doi:10.1016/j.ceramint.2021.03.224

Cited by 31 publications

(10 citation statements)

References 32 publications

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“…Magnetite crystal growth leads to enhance the scattering and multiple reflections of microwaves, causing electromagnetic wave energy attenuation. 43 So that, the absorbing performance can be regulated by the foaming time and layer thickness. According to Figure 7, the glassceramic foams foamed at 1100 • C show obvious magnetism, which can be the main reason for superior microwave absorption properties.…”

Section: Resultsmentioning

confidence: 99%

Preparation and properties of ferrimagnetic glass–ceramic foams based on pyrite slag

Liu

Zhang

et al. 2022

Int J Applied Ceramic Tech

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By employing a melt-sintering method, we prepared a new type of ferrimagnetic glass-ceramic foam (FGCF) using ferrimagnetic glass-ceramic and foaming agent SrCO 3 . The ferrimagnetic glass-ceramics were fabricated based on pyrite slag by a melt-quenching method. The effects of foaming agent content, sintering temperature and time on microstructure, magnetic properties, microwave absorption performance, compressive strength, and thermal conductivity of the as-obtained FGCF were analyzed. This foaming process at 1100 • C for 40 min with 3-wt% SrCO 3 provided an FGCF with a bulk density of .693 g/cm 3 , a porosity of 63.60%, a specific saturation magnetic moment of 5.2 A m 2 /kg, a compressive strength of 2.61 MPa, a thermal conductivity of .241 W/(m K), and the calculated reflection loss of −12.1 dB for a layer thickness of 9 mm.

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Section: Resultsmentioning

confidence: 99%

Preparation and properties of ferrimagnetic glass–ceramic foams based on pyrite slag

Liu

Zhang

et al. 2022

Int J Applied Ceramic Tech

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“…[2,[7][8][9] Among the EM absorbing materials, ferrite is an effective microwave absorber with good permeability and high dielectric properties, which have been widely studied. [10][11][12][13] Furthermore, ferrites generally reduce the skin effects occurring at highfrequency EM waves because of their high resistivity (10 6 -10 10 Ω m). [14] Therefore, they can serve as effective microwave absorbers.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Microwave Absorption Properties of Fe₃O₄/CuS Composites

Yin

et al. 2022

Physica Status Solidi (a)

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A two‐step hydrothermal method is used to produce Fe3O4/CuS composites with a distinct layered structure of CuS. The composition, magnetism, and absorbing properties of the different proportions of Fe3O4/CuS composites are characterized. The results show that Fe3O4 absorbs electromagnetic waves through orientation polarization and magnetically related natural resonance and that high conductivity enhances CuS microwave absorption. Compared with single‐phase Fe3O4 and CuS, Fe3O4/CuS composites exhibit superior microwave absorption performance with a considerably reduced matching thickness and increased effective absorption bandwidth in the 1–18 GHz range, which can be attributed to the interfacial coupling‐induced polarization between heterostructure Fe3O4 and CuS. Based on these results, Fe3O4/CuS composites can be absorbers with a far wider microwave‐effective absorption bandwidth.

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“…However, there are still some nickel smelters (such as Jinchuan, China) that are limited by factors such as a high MgO content in the raw materials, a high slag viscosity, and process conditions, resulting in a high nickel content in nickel slag. At present, the primary nickel slag disposal method is stacking, which occupies a large amount of land and introduces serious pollution into water resources and soil near storage locations [9][10][11]. More importantly, the nickel slag produced by pyrometallurgy contains residual nickel and a broad array of other valuable metals [12][13][14].…”

Section: Introductionmentioning

confidence: 99%

“…Common methods used to extract valuable metals from waste slag include hydrometallurgy [18][19][20][21], pyrometallurgy [22][23][24], and flotation [25][26][27]. Considering production costs and secondary pollution, effective use of nickel slag in hydrometallurgy and pyrometallurgy is difficult to achieve [11,[28][29][30]. Flotation is widely used due to its low cost, short process flow, and high production efficiency advantages [31][32][33].…”

Section: Introductionmentioning

confidence: 99%

Recovery of Valuable Metals from Nickel Smelting Slag Based on Reduction and Sulfurization Modification

et al. 2021

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Nickel smelting slag contains valuable metals including nickel and copper. Failure to recycle these metals wastes resources, and disposal of nickel slag in stockpiles results in environmental pollution. Nickel slag recycling is important, and metals can be recovered from slag by flotation. However, considering the complex forms in which valuable metals occur in nickel slag, high yields are difficult to achieve by direct flotation. In this study, nickel slag was modified by reduction and sulfurization to render it more amenable to metal recovery through flotation. The mechanism was assessed based on thermodynamics and elements’ phase distributions. Thermodynamic analyses indicated the feasibility of nickel slag modification by reduction–sulfurization smelting. The results of chemical phase analysis show that the forms in which valuable metals occur in nickel slag can be modified by reduction–sulfurization, and the proportion of metals existing in sulfide and free metal states in nickel slag can be increased. Compared with the direct flotation of raw slag, the recovery of nickel and copper from top-blowing slag increased by 23.03% and 14.63%, respectively. The recoveries of nickel and copper from settling slag increased by 49.68% and 43.65%, respectively.

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Preparation of Fe3O4 particles with unique structures from nickel slag for enhancing microwave absorption properties

Cited by 31 publications

References 32 publications

Preparation and properties of ferrimagnetic glass–ceramic foams based on pyrite slag

Preparation and properties of ferrimagnetic glass–ceramic foams based on pyrite slag

Synthesis and Microwave Absorption Properties of Fe₃O₄/CuS Composites

Recovery of Valuable Metals from Nickel Smelting Slag Based on Reduction and Sulfurization Modification

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Preparation of Fe3O4 particles with unique structures from nickel slag for enhancing microwave absorption properties

Cited by 31 publications

References 32 publications

Preparation and properties of ferrimagnetic glass–ceramic foams based on pyrite slag

Preparation and properties of ferrimagnetic glass–ceramic foams based on pyrite slag

Synthesis and Microwave Absorption Properties of Fe3O4/CuS Composites

Recovery of Valuable Metals from Nickel Smelting Slag Based on Reduction and Sulfurization Modification

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Synthesis and Microwave Absorption Properties of Fe₃O₄/CuS Composites