The chemical composition, mineralogy, and morphology of steel slag particles can influence both the cementitious characteristics and mechanical properties of steel slag. Two different types of steel slag (BOF and EAF ladle slags) generated from Indiana steel plants were considered in this study.
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In this paper, a mixture of Na 2 SiO 3 and NaOH was used to form an alkali-excited solution with steel slag (SS) as an additive to improve the solidification and hardening properties of coal gangue (CG) based geopolymers under alkali excitation by replacing the CG portion with SS with mass fractions of 0, 10 %, 20 %, 30 %, 40 %, and 50 %, respectively, under standard …
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Steel slag, a by-product generated during steel production poses a solid waste disposal challenge. ... Owing to its cementitious or pozzolanic properties it can be used as a blend in Portland cement [29]. ... The third variant uses a pulley as a magnetic harness and can be divided into two categories of electromagnetic type and non ...
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According to the production process, steel slag can be divided into converter (BOF) slag, electric arc furnace (EAF) slag, ladle furnace (LF) reÞning slag, stainless steel (AOD) slag, etc.
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Steel slag is an unavoidable by-product of the steel industry, with 150–200 kg of slag per tonnes of crude steel produced [11], and China's steel slag output exceeding 150 million tonnes in 2022.China's Environmental Protection Law clearly states that "steel slag produced by steel enterprises that is not processed and discharged will be subject to an environmental …
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The chemical composition, mineralogy, and morphology of steel slag particles can influence both the cementitious characteristics and mechanical properties of steel slag. Two different types of steel slag (BOF and EAF ladle …
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In recent years, many researchers studied the secondary use of steel slag [7].The main components of steel slag include Fe x O, Fe, CaO, SiO 2, MgO, and MnO [8].According to the composition and structural properties of the slag, the Fe-containing resources in the slag can be recovered by magnetic separation and returned to the steelmaking process, and the …
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Three methods have been widely employed to improve the reactivity of steel slag and concurrently reduce its potential harm on cement-based host materials: (i) physical excitation, which stimulates the hydration activity by physically grinding steel slag into finer powder (Liu et al., 2016), (ii) chemical excitation, which adds chemical admixtures, such as NaOH, Na 2 SO 4, H …
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2. Main properties of steel slag Steel slag is a kind of steelmaking by-product with complex composition. According to the different processes in the steel smelting process, steel slag is mainly divided into electric furnace slag, converter slag and flat furnace slag. As steel slag will experience a high
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arp (blast) furnace (BF) slag and steelmaking (iron making) slag. The steel furnace slag can be further divided into three groups; Basic-oxygen-furna. e (BOF) slag, Electric-arc-furnace (EAF) …
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Recently, there have been numerous ways to utilize steel slag. For instance, steel slag's high strength, good wear resistance, and stability make it a successful material for road infrastructure [5, 6].It can also be employed as the raw material in the preparation of cement due to its chemical similarity to Portland cement [7, 8]; It can also be used for wastewater …
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As shown in Fig. 7 A, slag recovery heat can be divided into three zones: Zone 1, which is the region above the melting temperature (above 1400 °C) and is most suitable for endothermic reactions with a high reaction rate and at which slag cooling can occur at any rate; Zone 2, which is the region between nose- and melting-point temperatures ...
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The main physical and chemical properties of steel slag. The porosity of steel slag particles is not uniform. It will accelerate the reaction of f-CaO and periclase in weak particles with water vapor in an atmospheric steam environment. ... It can be sequentially divided into fast dissolution, induction, acceleration, deceleration, and ...
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Chemical Mechanical Effect of Steel Slag on Pavement Fig. 1. Flowchart of discussion for this review paper 2. Production of Steel Slag Usually steel slag consists of scarp (blast) furnace (BF) slag and steelmaking (iron making) slag. The steel furnace slag can be further divided into three groups; Basic-oxygen-furnace (BOF) slag,
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Steelmaking slag can be divided into two types: converter slag, which comes from a converter or electric arc furnace, and blast furnace slag [8, 11]. An acid solution is mainly used as an extractant, various acids, such as strong acids like HCl, HNO 3, and H 2 SO 4, and weak acids like CH 3 COOH and NH 4 Cl have been studied in this regard ...
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2. Physical and Chemical Properties of Steel Slag. According to the production process, steel slag can be divided into converter (BOF) slag, electric arc furnace (EAF) slag, ladle furnace (LF) …
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The ratio of steel slag to crude steel reaches 15–20 wt % during steelmaking production [1].Its production every year is more than 200 million tons worldwide and more than 100 million tons in China [2].However, most of them are abandoned when the utilized content is only 29 %, which causes land occupation, resource waste, and environmental pollution [3].
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Steel slag is a large discharge of industrial waste slag. Chinese effective utilization rate of steel slag is only 20%, causing great harm to the environment and economy.
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Steel slag is considered to improve the road performance of cold mixed asphalt (CMA) due to its superior physicochemical characteristics.
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EAF slag can be divided into EAF-C slag from carbon steel and EAF-S slag from stainless steel, depending on the ingredients added during the steelmaking process. ... The chemical properties of EAF slag depend more on the feed steel scrap, and its constituents have larger variation. ... The carbonized steel slag can improve the freeze-thaw ...
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Selected physical properties of steel slag are shown in Table 10.1. Depending on the used production technology, the steel slag can be divided into a basic oxygen steel slag, an electric …
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Steel slag can be divided into two parts: active components (e.g. C 3 S, C 2 S, C 4 AF, C 2 F, and C 12 A 7) and non-active components (e.g. RO phase and Fe 3 O 4) [24]. The grindability of the active components is similar to that of cement, but the non-active components which contain much Fe are very hard to grind.
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According to the difference in crude steel smelting processes, steel slag can be divided into basic oxygen furnace (BOF) steel slag, electric arc furnace (EAF) steel slag, and ladle furnace (LF) steel slag. ... tested the content of f-CaO in steel slag by chemical titration, and the results showed that the average content of f-CaO in steel slag ...
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Hainin et al. [14] summarized the engineering properties of steel slag and its application advantages for road construction and proposed that the geotechnical characteristics of steel slag needs ...
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The interaction of carbonation and hydration of steel slag and improvement of properties are discussed. ... Among them, it can be divided into high alkalinity (B﹥2.5), medium alkalinity (1.8﹤B﹤2.5) and low alkalinity (B﹤1.8) SS, according to alkalinity values. ... the main minerals in the SS will undergo the chemical reactions listed in ...
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Table 3 and Table 4 presents the chemical and physical composition of silica fume from a previous paper that has been studied by the author. Through this analysis the chemical composition in Çakır & Sofyanlı, 2015 Cao is greater than 1% (<1), SiO 2 is<85% (˃ 85), SO 3 is greater than 2% (<2). By Mastali & Dalvand, 2016 in his paper SiO 2 is 85–95%, Al 2 O 3 is …
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The chemical compositions and physical properties of the cement and steel slag. Chemical composition (%) Cement Steel slag CaO63.06 46.94 SiO 2 20.51 14.32 Al 2 O 3 5.91 4.92 Fe 2 O ... The steel slag can be divided into four fractions based on …
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Organic modification can be further divided into two types, one is to use acids (hydrochloric acid (Gu et al ... The -NCO groups can be tightly attached by chemical bonding with -OH (mainly present in asphaltene) in asphaltene ... Effect of surface modification on properties of steel slag aggregate and mixture. Construct. Build. Mater ...
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It was concluded that the physical and chemical properties of glass ceramics were better than those of natural marble and ceramic tiles. ... 2.6.1 Direct carbonization of steel slag. Direct carbonization can be divided into direct dry and wet carbonization. The effect of the direct dry carbonization method depends on the carbonization ...
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Steel slag is a solid waste produced in crude steel smelting, and a typical management option is stockpiling in slag disposal yards. Over the years, the massive production of steel slags and the continuous use of residue yards …
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