Cementitious and pozzolanic behavior of electric arc furnace steel

The melting and quenching of this slag in a reducing carbon environment leads to a reduction in Fe-oxide content and hence, a large change in the chemical balance of the slag. ... Electric arc furnace steel slag because of its high Fe-oxide content and complete crystallinity is currently used mainly for landfills and road aggregates. In order ...

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Recent research progress on recycling metallurgical waste slag …

The green, efficient, and pollution-free recycling of metallurgical waste slag has garnered global attention. This study reviews the latest technologies for the recycling of steel slag (SS) and ladle refining slag (LFS), as well as the recent advancements in impurity element recovery using an applied electric field.

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15th Steelie Awards shortlist announced

The Steelie Awards recognise member companies for their contribution to the steel industry.

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Concretes made of EAF slag and AOD slag aggregates from stainless steel

In stainless steel process, EAF slag is a similar crystalline rock but its chemical composition is different from that of EAF slag from carbon steel process [19]. Its content in iron oxide is lower and may explain its lower specific density. This could lead to a lower strength noticed in concrete made of this type of EAF slag aggregates.

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Off‐Gas Waste Heat Recovery for Electric Arc …

In addition to the off-gas waste heat flow, the amount of electric arc furnace dust (EAFD) must be considered for the process design. The reference steel plant has a dust load of 20 g · m − 3 (STP) after off …

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Novel method for improving iron recovery from electric arc furnace slag

The iron element in electric arc furnace (EAF) slag is extremely difficult to recycle due to the low specific magnetic susceptibility of the RO phase (a solid solution of FeO, MgO, CaO, and MnO). Landfilling EAF slag is strictly forbidden for environmental consideration because of poisonous Cr6+ leaching. The original RO phase could be …

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EAF energy optimization at Nucor-Yamato Steel

However, the EAF energy balance is complex due to the combined input of electrical energy and chemical energy resulting from natural gas (NG) combustion and oxidation reactions in the steel melt ...

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Physicochemical Properties of Air-Quenched Electric Arc …

2 17 Synopsis: 18 Air-quenched electric arc furnace slag (AEAFS) is a black sphere or spheroid particle prepared by 19 an air quenching theology using electric arc furnace steelmaking slag as raw ...

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Phase development in steelmaking slags during a gas quenching

Studies have shown that rapid cooling of steelmaking slag can effectively reduce its f-CaO content.Li et al. [19] reported that the f-CaO content in the steelmaking slag treated by furnace cooling, air cooling, mist cooling and water quenching was 14.75%, 11.58%, 6.05%, and 2.64%, respectively.The details of CaO content will be discussed in …

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Recent research progress on recycling metallurgical waste …

In BOF slag and EAF carbon steel slag, the contents of Cr, Co, and Cd are lower, while the contents of P, Mn, and Fe are higher. Notably, P is the primary factor …

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An efficient molten steel slag gas quenching process: …

The new process for molten steel slag gas quenching and carbon sequestration waste heat recovery is outlined as follows: the source of gas quenching …

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Electric arc furnace carbon steel slag (EAF)

Electric arc furnace carbon steel slag is a by-product of the manufacture of steel by the electric arc furnace process (EAF). Production and Processing An Electric arc furnace (EAF) produces steel by the melting of recycled steel scrap, using heat generated by an arc, created by a large electric current Lime added (as flux) combine with ...

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Enhancing Recycling Potential: Exploring Reduction and …

The electric arc furnace steelmaking route is essential for sustainable steelmaking through hydrogen-based direct reduced iron. About 30% of the global steel …

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Life cycle assessment of melting reduction treatment for iron and steel

Until now, relevant scholars have done a lot of works on the environmental assessment of various recycling technologies of steel slag. For instance, Qian et al. (Qian et al., 2021) adopt Bacillus Mucilaginosus (BM) to absorb carbon dioxide to promote the carbonization of dead burned lime and periclasepared with traditional cement, …

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Beading Mechanism and Performance of Porous Steel Slag …

The use of the gas-quenching process for preparing porous bead slag abrasive was investigated in this paper. An X-ray diffractometer, field emission scanning electron microscope, mercury intrusion porosimetry, and stereo microscope were used to analyze the microbead forming mechanism, pore structure, acid–alkali resistance, and …

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Component modification of steel slag in air quenching …

The results show that the fly ash added into the steel slag before air quenching can more effectively improve the slag's grindability than mill tailings under the same conditions due to the reaction between fly ash and steel slag at high temperatures. ... BOF and EAF slags were mixed and re-heated at high temperatures varying from 1250 …

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Development of an electric arc furnace steel slag-based …

This paper details the development process of ceramics made out of electric arc furnace (EAF) steel slag, to be used as a shaped homogenous thermal energy storage (TES) media in packed-bed thermocline systems for high-temperatures industrial waste heat recovery, concentrated solar power (CSP), and Carnot batteries …

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Modifying hot slag and converting it into value-added …

The iron and steel industry is an energy-intensive industry that consumes the largest manufacturing energy, accounting for approximately 6.7% of the world's total CO 2 gas emissions (Watson et al., 2005, Wu et al., 2016) and 18% of the world's total industry final energy consumption in 2013 (International Energy Agency (IEA), 2015).Global …

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Electric Arc Furnace Steelmaking and Slag …

The growth of electric arc furnace (EAF) steelmaking in North America has occurred mainly in the past 40 years due to low electricity prices, an abundance of steel scrap (especially near large …

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Environmental benefit assessment of steel slag utilization …

The basic oxygen furnace (BOF) slag, electric arc furnace (EAF) slag, and ladle furnace (LF) slag are three major types of SS produced in the steelmaking processes. As drawn in Fig. 2, BOF slag and EAF slag are both produced during the first refinement of steel (Humbert and Castro-Gomes, 2019).

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Outotec SAF Smelting

The Outotec Submerged Arc Furnace (SAF) is a closed-type, environmentally friendly, and energy-efficient solution for ... and cleans the gas, quenching sparks from the furnace to eliminate the risk of explosion. Because it contains no ... Typically, slag is granulated by using water sprays during tapping. Granulation is a cost-effective ...

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Phase development in steelmaking slags during a gas quenching

Gas quenching dry slag granulation process is an energy-saving environmental protection method for waste utilization and waste heat recovery of molten slag, and the molten slag is broken up by ...

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Recycling of Malaysia's EAF steel slag waste as novel fluxing …

Electric arc furnace (EAF) slag is one of the most common by-products in the steelmaking industry. ... He et al. (2020) evaluated the greenhouse gas burden of Chinese steel production and found that advanced high-strength steel can save greenhouse gases from cradle to grave compared to traditional crude steel. Ter Teo et …

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The ABC of steel

C. Carbon dioxide – CO 2, a colorless gas, soluble in water to form carbonic acid; included in carbonated drinks and comprises 0.04% of the atmosphere and is identified as a greenhouse gas Carbon monoxide – CO, a colorless and odorless energy-rich gas which burns with a blue flame; noxious. Upon combustion, carbon dioxide is formed Carbon …

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Waste heat recovery in iron and steel industry using organic …

High temperature liquid such as high temperature iron slag, steel slag and high temperature water ... can be utilized more efficiently by promotion of the wet coal technology and dry quenching technology. ... Development of a thermal oil operated waste heat exchanger within the off-gas of an electric arc furnace at steel mills. Appl. Therm. …

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Novel method for improving iron recovery from electric arc …

The iron element in electric arc furnace (EAF) slag is extremely difficult to recycle due to the low specific magnetic susceptibility of the RO phase (a solid solution …

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The positive contributions of steel slag in reducing carbon …

Steel slag is a by-product generated during the steelmaking process, constituting 15 to 20 % of crude steel production [3].Steel slag possesses significant sensible heat, carbon sequestration potential, and resource utilization capacity, all of which are crucial for reducing CO 2 emissions in the steel industry. Given its high heat content in the molten …

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Properties

The mineral composition of blast furnace slag generally consists of melilite (Ca 2 MgSi 2 O 7 - Ca 2 Al 2 SiO 7) and merwinite (Ca 3 MgSi 2 O 8).Steelmaking slag (BOS or EAF) mainly consist of dicalciumsilicate (Ca 2 SiO 4), dicalciumferrite (Ca 2 Fe 2 O 5) and wuestite (Fe 1 -x- y,Mg x,Mn y)O z.. The physical properties of iron and steel slags …

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Steel Slag

Carbon dioxide sequestration using steel slag—modeling and experimental investigation. Smitha Gopinath, Anurag Mehra, in Carbon Dioxide Sequestration in Cementitious Construction Materials, 2018. 4.1 Introduction. Steel slag is an industrial waste that is generated during the production of steel. In the production of steel, oxides of metal …

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Research on Trivalent Chromium Removal from Wastewater by Gas Quenching …

Gas quenching steel slag (GQSS) without any post treatment and modification could be utilized to remove Cr(III) from wastewater. Due to lower content of reductive material in GQSS, it was ...

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2.4 MS17-15 3rd proof.indd

quench, excess fugitive emissions, poor indoor air quality, ... r Fig 5 Some effects of over- or under-oxidised conditions in EAF r Fig 6 Slag chemistry and off-gas analysis optimisation 2.4 MS17-15 3rd proof.indd 71 27/4/17 01:08:32. MILLENNIUM ... r Fig 8 Kanto Steel initial off-gas analysis review

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Pressurized steam aging process for steel slag

This study investigated the influence of electric arc furnace steel slag (0–20% by weight of ¾ inch sized aggregates) using the Marshall stability of blends to determine the optimal slag ...

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