— The slag generated from a steelmaking cycle is later processed, and the final product after processing is referred to as basic-oxygen-furnace slag (BOF slag). The chemical reactions occurring during the removal of impurities determine the chemical composition of the basic-oxygen-furnace slag [ 1, 3, 5 ].
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form the molten slag which stays on top of the liquid steel in the converters due to density differences. BOF slag particles form in irregular shapes with rough surfaces and dark gray in color [6, 13]. Fig. 1. Typical steelmaking slag figures [22]. BOF slag mainly consists of CaO, MgO, SiO2, and FeO. The total concentration of
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— Magnetic susceptibility measured for some surrounding rocks (micaschiste, gneiss, sandstone) are included. Hematite and magnetite usual susceptibilities are given as ...
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transfers magnet associated rare earth elements (REE) into slag. Recovery potentials of REE are estimated from concentrations in steel slags. Keywords:
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— Therefore, slow-cooling experiments were undertaken to improve the grain size distribution. The grain size distributions were determined using in-situ image analysis. The samples were ground to their apparent liberation size and high gradient magnetic separation was used to separate the magnetic oxides from the nonmagnetic silicates …
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— The P 2 O 5 content in steelmaking slag was approximately 2–5%, and it is continuously increasing because more and more low-grade iron ores are mined and utilized (Matsubae et al., 2016; Miki, 2019).Due to the huge production of steel, the amount of P 2 O 5 contained in steelmaking slag is considerable. In Japan, it was estimated that the P …
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rization slag using a slag regenerator; P was reduced and concentrated in hot metal, and was further dephosphorized to produce fertilizer material. Yokoyama 5) proposed et al. a magnetic-separation method to separate and recycle the P-rich phase from steelmaking slag, by exploiting the dif-ferences in their magnetic properties.
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— Due to the distribution and small content of Cr in slag, it is challenging to separate it mechanically from slag. Therefore, chemical wet methods are needed to reduce Cr from slags despite the relatively high cost associated with these techniques. ... Recycling of steelmaking slag fines by weak magnetic separation coupled with selective ...
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— Representative samples of DeS slag fines, BOF slag fines, EAF slag fines and LMF slag fines from three ArcelorMittal Americas steelmaking plants have been characterized and tested with weak magnetic separation coupled with selective particle …
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— Release of Fe(II) from steelmaking slag was tested in batch experiments at 298 K. Supplementary Fig. S1 shows an illustration of the experiment. Steelmaking slag (0.50 g), municipal waste (0.10 or 0.30 g), or a mixture of slag and waste were packed into a dialysis bag (flat width 34 mm, MWCO 8000-14000Da).
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— Magnetic separators process steelmaking slag in multiple layers for mass production and non-magnetic particles are attracted to a magnet roll by magnetic particles [1]. Therefore, precision...
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Steelmaking slag, or steel slag, is a by-product from the production of steel during the conversion of hot metal to crude steel in a basic oxygen furnace, or during the melting of scrap in an EAF.The slag is generated as a melt and is a complex solution of silicates and oxides that solidify upon cooling. 11 Depending on the specific steel production process, …
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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, …
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— Steelmaking slags are usually processed for iron recovery by dry magnetic separation. The recovered iron-rich products are recycled back into the ironmaking and steelmaking processes to replace high-cost steel scrap and iron ores. However, current slag processing is far away from optimum conditions, especially for slag fines with small …
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— The steelmaking slags are referred to by the steel production techniques used, such as BOF, EAF, and ladle furnace etc. These steel making slags typically contain 20–25% iron (Kawatra and Ripke, 2002).Because the chemical composition of steel slags is highly variable, the mineral composition of steel slag also varies.
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The magnetic process, in principle, separates the magnetic part (mostly metallic material covered with other non-magnetic impurities) from the slag mixture in different size …
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— To improve the efficiency of iron recovery from steel slag and reduce the wear-and-tear on facilities, a new method was proposed by adding a secondary screen sizer to the magnetic separation process according to grain size distribution of magnetic iron (M-Fe) in the slag. The final recycling efficiency was evaluated by calculating the …
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— A schematic flowchart of general steelmaking slag treatment procedures is illustrated in Fig. 1. As metallic iron and iron minerals are normally heavily contained in the steelmaking slags, it is necessary to conduct magnetic separation for a more efficient reclamation of some iron-rich resources (Alanyalı et al., 2006).
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— The chemistry of steelmaking slag also makes it a contender for adsorption of H 2 S and metalloids ... 2010). Records show that as early as 1589 steelmaking slag has been used to make cannon balls in Germany (Joulazadeh and Joulazadeh, 2010), and in the 1950s slag was utilized to stabilize riverbanks as well as railway ballast, artificial …
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method to separate and recover iron from steel slag. After magnetic separation, the recovered magnetic iron (M-Fe) particles can be fed back to BOF, E AF or sintering …
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The steelmaking slag used in this study was converter slag obtained from Shougang Qian'an Iron and Steel Co. Ltd., China. The particle size of the steelmaking slag used was less than 75 lm. The chemical composition and crystal form of the used steelmaking slag were analysed by using X-ray fluorescence (XRF) and X-ray diffraction (XRD ...
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— The activity of P 2 O 5 in steelmaking slag of basicity 2.4 (containing even 25% P 2 O 5) is reduced drastically to 10 −15 –10 −20. Thus, for effective removal of phosphorus, basic steelmaking processes have to employ slag of high basicity. If basicity falls, phosphorus may revert to the metal phase.
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— Mineralization is an important means for emission reduction and utilization of CO 2.Industrial calcium-based by-products such as steelmaking slag and carbide slag are often used as inexpensive mineralizers for CO 2.In this investigation, the pH was tested on-line during the mineralization process of CO 2 and steelmaking slag, carbide slag and …
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— In this experiment, dry magnetic separation and wet weak magnetic separation of steel slag were separately performed, and the reasonable process …
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— Basic oxygen steelmaking (BOS) slag, a product of hot metal element (e.g., Si, Mn, Fe, P) oxidation and flux (e.g. lime, dolomite) dissolution, plays a critical role in the production of high-quality crude …
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steelmaking slag magnet separate germany. steelmaking slag magnet separate germany steelmaking slag magnet separate germany The magnetic 10–50 mm product of the slagprocessing unit is charged to blast furnaces as raw material and the magnetic pieces in the range of 50–500 mm are charged to BOF as scrap In addition the −10 mm fraction is …
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— The operating parameters of a dry magnetic drum separator can be optimized to achieve optimum product Fe grade and yield for maximizing the recycling ratio and the total value-in-use of the …
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— To separate and recover P from steelmaking slag, selective leaching of the P-containing solid solution was proposed. ... Kubo et al. have researched magnetic separation for steelmaking slag. 7, 8 ...
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— DOI: 10.1007/s11663-024-03116-z Corpus ID: 269654725; Effect of MgO on Phase Structure and Evolution of Steelmaking Slag During Cooling @article{Gu2024EffectOM, title={Effect of MgO on Phase Structure and Evolution of Steelmaking Slag During Cooling}, author={Wen-feng Gu and Jiang Diao and Zhiqiu Lai …
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— Steelmaking in the electric arc furnace (EAF), either scrap-based or based on hydrogen direct reduced iron, will in future contribute substantially to the reduction of CO2 emissions in the iron and steel industry. However, there still will be the need to introduce carbon into the EAF process either to carburize the steel or to create ing …
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This evidence reveals the potential to separate P from steelmaking slag. In this chapter, various technologies for P separation and recovery from steelmaking slag are described. They include magnetic separation, capillary action, dissolution, and carbothermic reduction. Since each method has its own merits and demerits, the best choice of ...
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