The work results reported by (Fregeau-Wu et al., 1993) show that phosphorus in steel slag occurs predominantly in di-calcium silicate and to a lesser extent in di-calcium ferrite in solid solution. High gradient magnetic separation was used to separate the P-bearing di-calcium silicate from the iron- and manganese-bearing minerals.
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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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After BOF slag was oxidized at 1300 ℃ for 240 min and cooled in the furnace (1 ℃/min), the grade of magnetic slag obtained by magnetic separation had a grade of 40.26%, a recovery of 70.95% ...
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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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After magnetic separation, the steel slag is irregularly piled on the open ground. Powder formation of the steel slag that is solidified and stored on the ground begins immediately after its discharge, and it is a continuous process. ... The optimized magnetic separation process is shown in Fig. 7; the metal Fe recovery rate for these processes ...
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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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The conventional method for disposal of slags is dumping. However, it is possible to process the slags to be used in the production of metallic iron, or as an additive in cement making. In this study, a basic oxygen furnace (BOF) steelwork slag obtained from the Kardemir integrated iron and steel works, Karabuk, Turkey is used.
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Coal-based direct reduction (CBDR) in iron ore smelting, emerging as a prominent method in the mid-20th century, represents a significant evolution in response to energy crises and environmental concerns, entails the removal of oxygen from solid iron ore to produce solid sponge iron that can be used in electric arc furnace (EAF) steel production (Wang et al., 2021, …
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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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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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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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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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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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Steel slag is a byproduct generated during the steelmaking process. As the largest steel producer in the world, China produces over 100 million tons of steel slag annually, accounting for approximately 15–20% of crude steel production (Rui et al. 2022, Shi et al. 2022).After steelmaking, the slag is placed in a slag heap and subjected to magnetic separation to recover …
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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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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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The combination of Low and High Intensity Magnetic Separation (LIMS and HIMS) of ground LD slag at 63 μm in wet process may recover ferromagnetic particles (iron oxides) at LIMS and paramagnetic ...
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Steel slag is the main waste product in the steelmaking process. Because of its chemical composition and technical properties, it can be reused as raw material in steel plants and can serve as a ...
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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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pieces present in the slag by magnetic separation [6]. The very small particles (< 0.5 mm) occurring in slag ... Two slags, FS and LS originated during steel making process were studied and their chemical composition is shown in Table 1. Calcium oxide is the dominant component of both slags as evident from Table 1. Both FS
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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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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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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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Steel slag separation methods mainly include supergravity, flotation and magnetic separation (Li et al., 2016, Zhu et al., 2023, Song et al., 2019). ... 2010). Menad separated high iron grade iron oxides from LD slag by optimising the magnetic separation process and investigated the effect of particle size on the magnetic separation results ...
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The magnetic separation method is used for separating metallic iron and iron minerals from steel slag. Commonly used magnetic machines are the cross-belt magnetic …
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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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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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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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DOI: 10.1016/S1006-706X(17)30023-7 Corpus ID: 136316934; Optimization of magnetic separation process for iron recovery from steel slag @article{Lan2017OptimizationOM, title={Optimization of magnetic separation process for iron recovery from steel slag}, author={Yuanpei Lan and Qing-cai Liu and Fei Meng and De-liang Niu and Heng Zhao}, …
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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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