— In order to recycle the phosphorus from P-bearing steelmaking slag, the influences of magnetic field intensities, slag particle sizes and slag compositions were investigated by magnetic separation experiments. ... To realize the high value-added utilization of BOF slag, selective leaching was adopted to separate the P-bearing …
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Steelmaking Slag. satyendra; April 12, 2013 ... It is advantageous to separate this iron from the slag for the purpose of using the iron recovered as a substitute for scrap iron and / or making effective use of the slag for …
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— 1. Introduction. Steelmaking slag, with an annual production of 190–280 million tons (U.S. Geological Survey, 2020), is the main by-product of steelmaking and steel refining processes.Traditionally, steelmaking slag has been widely used in the construction industry as a resource for road construction, concrete coarse aggregate, insulating …
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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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— 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 …
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— In order to recycle the phosphorus from P-bearing steelmaking slag, the influences of magnetic field intensities, slag particle sizes and slag compositions were investigated by magnetic separation ...
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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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— 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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— 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 of ...
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3.1 Cooling of the steelmaking slag As steelmaking slag is formed, it is in a molten or red-hot state at a temperature of 1,300-1,700°C. Therefore, steelmaking slag must be immediately subjected to the cooling process upon removal. Ordinarily, this is performed in a cooling yard by air cooling and moderate water sprinkling.
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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 …
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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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— Slag is the by-product of iron- and steelmaking processes. Normally, around half to one tonne of slag would be generated for yielding one tonne of rolled iron or steel (Lobato et al. 2015).It was reported that the world steel production was 1.9 billion tonnes in 2016, which suggested that at least around 1 billion tonnes of slag is produced during …
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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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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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— BOF and EAF slags are generically known as steelmaking slags. BOS slag is also known as BOF (basic oxygen furnace) slag, and the choice of acronym depends on …
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Integrated iron and steel plants generate large amounts of metallurgical slag, which usually contains some quantity of metals or mixtures of oxides that could be treated to be recycled in various applications. ... Application of magnetic separation to steelmaking slags for reclamation Waste Manag. 2006;26(10):1133-9. doi: 10.1016/j.wasman.2006. ...
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— 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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— In this experiment, dry magnetic separation and wet weak magnetic separation of steel slag were separately performed, and the reasonable process conditions for magnetic separation of steel slag to separate iron were selected according to the …
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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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— Results of thermodynamic simulation, composition analysis of samples and weight data for the obtained magnetic fractions (resistant or non-resistant to the …
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and separation from steelmaking slag. Keywords Steelmaking slag · Magnetic separation · Capillary action · Elution · Dissolution · Carbothermic reduction 22.1 Introduction Iron (Fe) is the most abundantly produced metal in the world. ... there is a chance to effectively separate P from other elements. Magnetization curves for the liquid ...
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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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— 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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— 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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— 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 susceptibility measured for some surrounding rocks (micaschiste, gneiss, sandstone) are included. Hematite and magnetite usual susceptibilities are given as ...
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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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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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