The Steelmaking Transformation Process and Its …
— Abstract. The main challenge of the European steel industry for the next decade is the steel production transformation process. Many steel producers aim to …
Efficient separation of iron elements from steel slag based …
— 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 …
The recycling and reuse of steelmaking slags — A review
— Recycling of steelmaking slag fines by weak magnetic separation coupled with selective particle size screening
(PDF) Separation of steelmaking slag with …
— 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 ...
Recovery of Phosphorus from Modified Steelmaking …
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.
Steelmaking
— 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.
Selective Precipitation of Titanium, Magnesium, and
— 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 …
Recovery of high-quality phosphate from steelmaking slag …
— 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 …
Steelmaking Slag Beneficiation by Magnetic Separator …
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
Municipal green waste promotes iron release from steelmaking slag …
— 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).
Phosphorus Separation and Recovery from Steelmaking Slag
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 ...
Carbon Dioxide Sequestration via Steelmaking Slag
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 ...
The recycling and reuse of steelmaking slags — A review
— 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 …
Enhancement of Iron Recovery from Steelmaking Slag Fines …
— 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 …
Separation of Phosphorus and Manganese from Steelmaking Slag …
— Steelmaking slag contains considerable amount of manganese (Mn) and phosphorus (P), and recycling them is an important issue. Since Mn is an alloy added to enhance the steel quality, while P is a harmful impurity in the steel product, they need to be separated for recycling. We have already found the possibility of separating Mn and P …
Optimization of magnetic separation process for iron …
— 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 …
Optimization of magnetic separation process for iron …
— 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 …
Application of magnetic separation to steelmaking slags …
— 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).
Enhancement of Iron Recovery from Steelmaking …
— 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 …
Review on the Use of Alternative Carbon Sources in EAF Steelmaking …
— 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 …
Enrichment of Phosphorus Oxide in Steelmaking Slag by …
— The recoverability of phosphorus oxide from steelmaking slag was investigated using a mechanical approach involving capillary action. It was found that P2O5 was concentrated in the 2CaO·SiO2 phase. To separate the P2O5-enriched solid 2CaO·SiO2 phase and FeO-rich liquid phase in steelmaking slag, capillary action was …
Structural and hyperfine magnetic properties of primary steelmaking slag
— Nowadays there is a high interest in the recovery of industrial steel waste into useful by-products. For that purpose, it is important to know the physical and chemical properties of steel slag in order to better understand its characteristics and thus seek applications. In this work, we study primary steel slag formed in an electric arc furnace …
Magnet Associated Rare Earths in Steel Mill Slags
transfers magnet associated rare earth elements (REE) into slag. Recovery potentials of REE are estimated from concentrations in steel slags. Keywords:
Steelmaking Slag
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 applications where iron is an impurity. ... than the ordinary steelmaking slag. In Germany steel slag processed to ...
Processing and Reusing Technologies for Steelmaking …
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.
SEPARATION OF THE MAGNETIC FRACTION FROM THE …
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 …
Chemical, Mineralogical, and Morphological Properties of Steel Slag
— 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 ].
ferrochrome slag processing using dry magnetic separator
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Application of magnetic separation to steelmaking slags for …
— 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.
Synergistic mechanisms of steelmaking slag coupled with carbide slag
— 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 …
Utilization of steelmaking slag in cement clinker production: …
— 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 ...
Separation and Recovery of Phosphorus from P-bearing Steelmaking Slag
— 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 …