The untreated EAF slag exhibits a peak position of Al2p at 73.8 eV, which then varies depending on the alkalinity level and the applied technique. Generally, having a BE of Al2p that ranges from 73.2 eV to 74.4 eV and from 73.9 eV to 74.8 eV indicates tetrahedral and octahedral coordination of the Al-O bond, ...
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Currently, Electric Arc Furnace Slag (EAFS) is undervalued and is therefore only used in road construction, while blast furnace slag (BFS) is used as an interesting alternative in construction materials to replace natural aggregates in the manufacture of concrete. Steel slag (SS) represents a promising secondary resource due to its high content of critical metals, such …
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Electric Arc Furnace (EAF) slag from one of the steel plants in Western India has been characterised in detail. Its effectiveness as hydraulic material is examined before and after heat treatment in an induction furnace. The study shows that while there is a marginal reduction in the early age strength of the Portland Slag Cement mortar, the ...
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Mineralogical composition of eaf slag and stabilised aod slag aggregates and dimensional stability of slag aggregate concretes. Construct. Build. Mater., 115 (2016), pp. 171-178, 10.1016/j.conbuildmat.2016.04.036. View PDF View article View in Scopus Google Scholar. Ahmad et al., 2017.
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In steel production, the electric arc furnace (EAF) process is the dominant method for melting recycled steel, iron scrap, pig iron, and direct reduced iron into a desired grade of carbon steel [1].Lime (CaO) and dolomite (MgO) are added into the steel melt and pressurized oxygen is introduced to mobilize impurities which are removed from the melt in the form of EAF …
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The slag binary basicity is a ratio between the oxides %CaO and %SiO 2. There are optimum points of basicity to achieve lower energy consumption, Figure 47. The use of slag saturated in MgO is of great importance in the EAF operation since the saturation in this oxide assists the formation of the y slag, contributing to higher
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The RfD of 0.071 mg/kg-day is preferred for EAF slag HRA: Used ATSDR chronic inhalation MRL (3E -4 mg/m. 3) Vanadium: Noncarcinogen—RfC and RfD based on current USEPA IRIS values. Assumed that Vanadium in EAF slag is unlikely to be in pentoxide form: Results ⏤ Residential Roadside Scenario – Arid
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Electric Arc Furnace (EAF) steel slag is a versatile renewable, sustainable, durable, and environmentally friendly aggregate produced during the steel making process at an electric arc …
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For EAF slag, both CaO and ferrous oxide (FeO) comprise a large proportion, where the CaO content ranges between 22 and 60% and the FeO content can go up to 40% (Yildirim and Prezzi, 2011). Note, the FeO content of EAF slags from stainless steel production is relatively low (e.g., 2%) (Shen et al., 2004). During the second refinement process ...
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The Dual Saturated EAF Slag Chemistry Derived Using Thermodynamic Calculations Dual saturated EAF slags may not occur under two conditions: 1) when the MgO content in slag is less than about 5 wt%, where the formation of both (Mg, Fe)O and Ca2SiO4 together is not
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When EAF slag was added to the base mixture, there was a positive trend of improvement in the physical properties and specifically, MOR peak value of 37.56 MPa was obtained when 40 % EAF slag was added. However, the MOR value as well as other physical properties started to decline when the base mixture had more than 40 % EAF slag. …
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electric arc furnace (EAF) slag doors, in order to allow removal of the excess slag (ES) from the EAF, is performed. The idea of additional slag doors is to allow deslagging of the EAF in certain unfavorable conditions when the slag height is too great and extends over the arcs. Whether the slag exceeds its optimal height, i.e. being greater ...
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E xposure levels for substances found in EAF slag that are associated with adverse effects observed in epidemiological studies, and how those levels compare with potential exposures through the unencapsulated use of EAF slag, including residential uses, such as landscaping. Population subgroup characteristics and human developmental stages ...
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EAF slag is generated during melting scrap in an electric furnace. It is a crystalline rock which is morphologically stable. AOD slag is generated during the refining process step. It naturally falls to a powder on cooling but can be stabilised, producing a solid crystalline slag. Today, stainless steel slag recovery as aggregates in concrete ...
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This article emphasises the importance of electric arc furnace (EAF) slag in the manufacturing of sustainable geopolymer concrete. This review paper examines the chemical composition, …
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Recycling waste materials were introduced in order to control slag ing in EAF steelmaking. The present paper reviews about slag ing behaviour focused on slag droplet volume (Vt/V0 ratio), their transformation and morphology during carbon/slag interaction using sessile-drop technique at 1550°C on polymeric (HDPE), agricultural waste ...
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For steel producers aiming to use an electric arc furnace (EAF) to smelt the direct reduced iron, a slag valorization route for the EAF slag must be considered to maintain …
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The waste heat of slag and flue gas of 74.1 and 66.1 kWh in EAF-FHM is quite higher than that of 23.9 and 5.8 kWh in in EAF-FS. As for the other energy terms, the overall difference is not obvious. HM provides more input energy, improves the energy intensity, and cuts down the consumption of other energy sources, especially the expensive ...
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EAF slag, in the same way as BOF slag, has traditionally been used as unbound material in preparing subgrades, subbases and bases for beds, embankments of roads and railways (Behiry, 2013, Chesner et al., 1998, Motz and Geiseler, 2001, Rohde et al., 2003, Stroup-Gardiner and Wattenberg-Komas, 2013).In general, these slags have good features as coarse …
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EAF steel slag aggregates were successfully incorporated by the Australian Grand Prix Corporation and Formula 1 onto racetracks in Adelaide and Melbourne Australia [4]. A testament to the durability of EAF steel slag is in its use in an SMA mix at what is known as the "World's Strongest Intersection".
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Electric arc furnace (EAF) slag is a by-product of steel production in electric arc furnaces. Several studies have tried to demonstrate its suitability in civil engineering application, such as in bituminous mixtures and cement-based materials, due to its good physical, chemical and mineralogical properties. Particularly the re-use as coarse aggregate for concrete …
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arc furnace; the EAF slag, which is produced in granulated form during the first stage of steel production, and the ladle furnace slag (LFS), which is a fine material produced at the second stage of steel production after the addition of fluxes to the molten slag in a …
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KEY WORDS EAF Slag, Ladle Slag, Recycling, Powder Injection, y Slag INTRODUCTION The Environment is becoming more and more a key issue for the Steel Industry. In particular areas where the increasing variable cost of production and the cost of men work are reducing the profit on the final product, the additional cost of residues dumping can ...
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2.1 EAF Slag Characterization The slag produced by the EAF is suitable for recovery and can be processed after a seasoning period, during which the waste is exposed to the weather precipitations for stabilization. Figure 3. Compact and porous EAF slag. Figure 4. Micrographic photos of the slag.
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The main challenge of the steel industry for the next decade is the steel production transformation process, starting in Europe. The CO 2 intensive blast furnace/basic oxygen furnace (BOF) route will be substituted by a combination of Direct Reduced Iron (DRI), based on natural gas, later on "green" hydrogen, with an Electric Arc Furnace (EAF) or a Submerged Arc Furnace (SAF), …
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In this work, the generated slag from electric arc furnace (EAF) provided by the French steel industry was characterized by using multitude analytical techniques in order to determine the …
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Where Q is the degree of polymerization, NBO is the non-bridging O, T is the tetragonal O and X is the mole fraction. 3. Temperature, conductivity increases with increasing temperature due to gradually loosens of the structure that hinders the movement of cations by the silicate network. 1,6) The value of electrical conductivity decreases rapidly to one hundredth …
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In this study, an estimation model, which predicts the slag ing height in the EAF steelmaking process, has been developed using big data from 298 sensors recorded during operation of a twin-shell DC-EAF steelmaking process for 105 days. The long short-term memory (LSTM) algorithm was adopted to deal with the dynamic and nonlinear slag ...
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Electric arc furnace (EAF) slag has excellent mechanical properties that justify its use as aggregate in the manufacture of bituminous mixes.
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This paper summarizes the factors that will influence future pathways to valorize EAF slags in the context of the development of a truly sustainable steel industry.
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