Separation and extraction of iron resources from hazardous …
@article{Liu2024SeparationAE, title={Separation and extraction of iron resources from hazardous electric arc furnace (EAF) steel slag: Aggregation of Fe-rich layers, magnetic separation, powder characterization}, author={Xin Liu and Yan-ping Bao}, journal={Process Safety and Environmental Protection}, year={2024}, url={https://api ...
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WET MAGNETIC SEPARATION OF IRON FROM FINE …
Generally, the steel slag (steel furnace and ladle furnace slags) contains an appreciable amount of magnetic substances such as metallic iron and magnetic iron oxide, and thus, they can be recycled by wet magnetic ... Results showed that the proposed magnetic separation process allowed to isolate 24, 18 and 42 wt. % of magnetic fractions for FS ...
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Recycling of steelmaking slag fines by weak magnetic separation …
In an integrated steel production process, steelmaking generally includes three integrated unit operations: hot metal desulfurization (DeS), basic oxygen furnace (BOF) refining and ladle metallurgy furnace (LMF) refining. ... Test results from magnetic separation of steelmaking slag fines with hand-held magnets showed that significant ...
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Optimization of magnetic separation process for iron …
T he ways for magnetic separation of slag usually va ry with cooling methods of liquid steel slag and its chemical/mineralogical composition. Mostly, steel slag magnetic separation process …
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Comprehensive Utilization Technology of Steel Slag
The remaining slag was discarded or sold at a lower price, and this resulted in the loss of a large amount of resources for the enterprises. In recent years, many Chinese manufacturers have established a magnetic separation line of slag and recover metallic iron in steel slag via breaking, magnetic separation, and sieving.
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Optimization of Iron Recovery from BOF Slag by …
In order to solve the problem of solid waste pollution of basic oxygen furnace (BOF) slag in the metallurgical process, this paper took BOF slag as the research object, and carried out oxidation reconstruction of BOF slag …
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Magnetic separation method of steel-making slag, and magnetic …
To provide a magnetic separation method of steel-making slag capable of heightening Fe concentration in recovery, in a magnetic separation method for recovering a ferrous compound and metallic iron by magnetic separation from slurry steel-making slag.SOLUTION: A magnetic separation method of steel-making slag includes steps of: bringing slurry containing crushed or …
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Up-Concentration of Chromium in Stainless Steel Slag and
Slags coming from stainless steel (SS) and ferrochromium (FeCr) production generally contain between 1 and 10% Cr, mostly present in entrapped metallic particles (Fe–Cr alloys) and in spinel structures. To recover Cr from these slags, magnetic and gravity separation techniques were tested for up-concentrating Cr in a fraction for further processing. In case of …
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DRY MAGNETIC SEPARATION TECHNOLOGY FOR THE …
processing characteristic. Steel slag, selected from a factory, was crushed, ground sieved and into different particle size ranges for the single-factor magnetic separation experiments. It was …
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An air-fluidized magnetic separator and its …
In order to address the issue of magnetic agglomeration leading to poor magnetic separation efficiency and low activity enhancement, resulting in limited utilization of steel slag fine powder material, this study proposes a novel …
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DRY MAGNETIC SEPARATION TECHNOLOGY FOR THE …
processing characteristic. Steel slag, selected from a factory, was crushed, ground sieved and into different particle size ranges for the single-factor magnetic separation experiments. It was determined that the optimum value ranges for the particle size, magnetic separation distance and rotating frequency were 0.15 mm-0.3 mm, 10 mm-
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Magnetic Separation
Magnetic separation is a physical separation process that relies on the different magnetic properties of components in a mixture. By applying a magnetic field, magnetic particles are separated from non-magnetic ones based on their magnetic susceptibility and volume, leading to efficient separation of substances.
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Steel Slag
Steel slag (SS) is a by-product obtained during the separation process of molten steel from impurities. Selected physical properties of steel slag are shown in Table 10.1. ... Currently, there are several recycling methods for steel slag: magnetic separation, cement production, road engineering and railway track applications, and soil ...
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Efficient separation of iron elements from steel slag based on magnetic …
The high temperature insulation allows the steel slag to be fully melted and uniformly mixed, and the slow cooling process applied to the slag provides enough time to grow for RO phase. The multi-stage wet weak magnetic separation method is suitable for steel slag, with a best magnetic separation intensity of 100 mT in the laboratory range and ...
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Carbonation Curing on Magnetically Separated Steel Slag …
Magnetic separation is an effective method to recover iron from steel slag. However, the ultra-fine tailings generated from steel slag become a new issue for utilization. The dry separation processes generates steel slag powder, which has hydration activity and can be used as cement filler. However, wet separation processes produce steel slag mud, which has …
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Waste to wealth: Recovery of value-added products from steel slag
To increase the selectivity of the magnetic separation process, preferential nickel separation via coal reduction route may be applied. An important factor governing the nickel yield for the process is the basicity ratio of slag. ... Steel Slag contains valuable metals like iron, nickel, magnesium, aluminium, vanadium and titanium. While ...
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Carbonation Curing on Magnetically Separated Steel Slag …
Magnetic separation can recover iron from the steel slag. However, the tailings (i.e., steel slag powder and steel slag mud) after magnetic separation become a new problem. Searching for proper strategies for the use of steel slag tailings after iron recycling would assist with high-value utilization of steel slag with a near utilization rate.
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Magnetic separation characteristics of steel slag powder in a …
This study reveals the magnetic separation characteristics of the equipment for inert minerals in steel slag powder and provides a solution for obtaining steel slag powder that …
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Dry Magnetic Separation Recovery Iron from Steel Slag …
the technological parameters of dry magnetic separation were optimized and the screening processwas used to replace the traditional magnetic separation process by low-intensity magnetic field.Somore than 80 wt. % concentrate of the iron was obtained, which improved the efficient recovery and rational utilization of steel slag powder. Introduction
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The Effect of Removing Hard-to-Grind Minerals from Steel Slag …
It is found that the removal rate of hard-to-grind minerals in steel slag is the highest when steel slag enters magnetic separation particle size of 1 mm and magnetic field strength of 1400 Gs. Compared with untreated steel slag, the grinding efficiency of treated steel slag can be increased by 22%, and the hydration activity is not affected.
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Characterization of Magnetic and Mineralogical Properties of …
This detailed mineralogical and magnetic characterization of slags provides a better understanding of the magnetic susceptibility of phases in each magnetic susceptibility class, …
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Characterization of Magnetic and Mineralogical Properties of Slag …
The magnetic separation process relies on the magnetic properties of the particles and the forces acting on them during separation. ... Zhao, H. Optimization of magnetic separation process for iron recovery from steel slag. J. Iron Steel Res. Int. 2017, 24, 165–170. [Google Scholar] Ma, Y.; Du, X.; Shen, Y.; Li, G.; Li, M. Crystallization and ...
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Up-Concentration of Chromium in Stainless Steel Slag …
After gravity separation of the HC FeCr slag, a fraction with a Cr content close to high grade Cr ores ( 50% Cr2O3) can be obtained. This fraction represents 12 wt.% of the HC FeCr slag, and can probably be used directly in traditional smelting processes. Keywords: stainless steel slag; ferrochromium slag; magnetic separation; gravity separation 1.
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Processing and Reusing Technologies for Steelmaking Slag
The iron/steel slag processing flow is schematically shown in Fig. 2. Steelmaking slag is subjected to the following four process-es: ① solidify and cooling of the hot molten slag, ② crushing and magnetic separation treatment of the slag to recover the metal iron, ③ crushing and classification of the slag for grain size adjustment
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Innovative Process for Strategic Metal Recovery …
This slag was generated using the EAF process and sampled after extracting the iron scrap by low-intensity dry magnetic separation. First, the representative slag sample was characterized to adapt its preparation pathway …
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Iron extraction from copper slag by additive-free activation …
The efficient separation between metallic iron (mean particle size of − 10 μm) and silica in the reduced product from CS and OCS-900 °C was not achieved through grinding-magnetic separation process (Fig. 9 (c) and 9(d)) as evidenced by the locked particles and independent silica particles found in the concentrate.
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An Overview of Utilization of Steel Slag
Reclamation of waste steel Steel slag contains approximately 10% waste steel, which can be reclaimed through crushing, sorting, magnetic separation and screening process. The developed countries carried out the research of recycling waste steel from steel slag earlier than other counties.
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WET MAGNETIC SEPARATION OF IRON FROM FINE …
Usually, the wet magnetic separation method is used to separate the metallic iron particles from the slag powder [4]. The magnetic process, in principle, separates the magnetic part (mostly …
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A Review of Direct Reduction–Magnetic Separation Process …
Larger metallic particles promote liberation of ferronickel from slag during subsequent crushing and grinding process and result in an improved downstream magnetic separation. ... Huang X-Z (2022) Upgrade of nickel and iron from low-grade nickel laterite by improving direct reduction-magnetic separation process. J Iron Steel Res Int 29:1164 ...
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Recent research progress on recycling metallurgical waste slag …
Magnetic separation method: By using steel slag's varying magnetic characteristics to effectively separate the phosphorus-rich phase: About 67 % of phosphorus is removed, and the operation is relatively simple: The phosphorus recovery rate is low and the volatilization rate is high [73], [74], [75] Wet acid leaching method
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