Ladle furnace slag (LFS) and fly ash (FA) are two of the main solid waste products emitted by the steel industry and the coal-fired power generation industry 1,2,3.About 20–25 billion tons of ...
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The solution was used to activate a mix between ladle slag and arc furnace slag. Furthermore, Xu and Yi (2020) activated ladle and ground granulated blast furnace slag (GGBS) mixes with a sole activator of either sodium hydroxide (NaOH), sodium sulfate (Na 2 SO 4), or sodium metasilicate (Na 2 SiO 3) with 1, 2, and 4 M respectively.
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Ladle furnace slag (LFS) is an alkaline solid waste material with a high calcium content, that is produced as a by-product of secondary refining processes in the …
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Slag Composition: The composition of furnace and ladle slag is often very complex. The slags that form in electric furnace melting result from complex reactions between silica (adhering sand and dirt from casting returns), oxides from scrap, other oxidation by-products from melting and reactions with refractory linings.
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Ladle furnace slag (LFS) is a potential new resource for the preparation of cementitious materials with early hydration activities. To evaluate the application performance of LFS as a supplementary cementitious material, the effects of LFS on the hydration and hardening performance of cement were studied from the aspects of the …
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Secondary refining of molten steel, also called secondary steelmaking or ladle metallurgy, is a technique in which molten liquid that has been primarily refined in a steelmaking furnace (converter and electric furnaces) is moved to another container for refining. The primary smelting of the steelmaking furnace is to melt the charge, …
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Ladle furnace slag is a high-calcium-based alkaline industrial solid waste inefficiently stacked at the site, which consumes large amount of land and pollutes water resources. Carbonation of refining slag not only solves the problem of poor compactness and poor stability of the refined slag as a product, but also eliminates waste and reduces ...
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It can be categorized by either the process in which it was generated (basic oxygen furnace slag (BOF-S), electrical arc furnace slag (EAFS), ladle refining slag (LFS)), or by the type of steel produced in said process (carbon steel slag or stainless-steel slag) (Yi et al., 2012, Liu and Wang, 2017, Ndlovu et al., 2017). Countries such as Japan ...
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The ladle furnace slag (LFS) applied in this investigation was a water cooled slag supplied by El Ezz flat steel company (collected from the slag yard), Suez, Egypt. Firstly, the slag was milled for 3 h in a laboratory ball mill to get fine powder having particle size less than 100 µm. On the other hand, the fine clay powder (kaolin- <100 µm ...
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Ladle furnace slag is a high-calcium-based alkaline industrial solid waste inefficiently stacked at the site, which consumes large amount of land and pollutes water …
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Industrial experiments were carried out to study the cyclic use of ladle furnace refining slag on desulfurization. Sampling of refining slag and steel were undertaken simultaneously at roughly equal intervals of time. The desulfurization capacity remained almost unchanged in the recycling slag compared with the primary slag. The …
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Furnace Slag. Furnace slag (or ground granulated blast furnace slag, GGBFS) is the granular material formed during the processing of iron blast furnace slag generated from steel manufacturing. ... 13.5.3 Ladle furnace slag (LFS) LFS is slag from secondary processes. It is one of the so-called secondary metallurgical slags (SECS), which are ...
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Ladle Furnace Slags. Most LF slags contain CaO, MgO, SiO 2, and Al 2 O 3 as major constituents with minor quantities of FeO, MnO, P 2 O 5, and TiO 2.The chemical composition varies depending on operating parameters and killing process. Compositions of LF slags from various plants categorized based on alumina content are listed in Table …
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Ladle furnace slag (LFS) with conventional curing was not effective for the immobilization of lead (Pb), while LFS with carbonation curing effectively reduced the leaching of Pb. The concentrations of leached Pb from carbonated specimens with initial Pb concentrations of 5000–25,000 mg/kg were decreased by four orders of magnitude than …
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Ladle furnace (LF) refining is one of the key procedures in steelmaking process and has been widely used in steelmaking plants for its high equipment matching degree, low equipment investment and outstanding refining performance. ... and also investigated the gas–steel–slag three-phase flow in ladle metallurgy by using the single …
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Abstract Ladle refining is a popular secondary metallurgy process and plays a vital role in achieving the desired chemistry and temperature during steelmaking. The …
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Ladle furnace slag disintegrates into fine powder during cooling due to phase transformations of di-calcium silicate. This creates an adverse impact on working conditions and the environment by dust generation. In this paper, a short overview on different studies to overcome the disintegration problem is provided. An attempt was also …
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Download scientific diagram | XRD pattern of ladle furnace slag (LFS). from publication: Ladle Steel Slag in Activated Systems for Construction Use | The construction industry needs to reduce ...
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Ladle furnace basic slag (LFS) is a by-product of the steelmaking process. It has rarely been recovered in the past and is usually disposed of in landfill sites. Despite containing stable chemical substances of great quality, some of which are potentially hydraulic, its practical applications have been limited.
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2 capture, Ladle furnace slag, Sustainable industry, Waste valorization Received: April 19, 2023; revised: August 04, 2023; accepted: September 26, 2023 DOI: …
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Ladle furnace process is the external refining process in which heating is realized by electric arc in a special ladle in vacuum. Also known as LF furnace refining or arc-heated ladle refining, it was developed by Nippon Tokushu Steel Co., Ltd. of Japan in 1971. It is used for refining process that uses alkaline synthetic slag, submerged arc ...
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Abstract. Ladle furnace slag (LFS) has been proposed as partial cement replacement due to its similar chemical composition with Portland cement. However, its mineralogical composition needs to be considered due to problems with expansive reactions and lower cementing activity. The objective of this study is to investigate the effect of …
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The primary steel slag can be categorized as basic oxygen furnace slag (BOFS) and electric arc furnace slag (EAFS). The remaining molten iron will undergo secondary steel refining process in the ladle furnace to modify the carbon content and eliminate impurities, producing ladle furnace slag (LFS).
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Abstract Ladle slag is a byproduct formed during the ladle refining stage of steel making. It is a dusty material that has been considered industrial waste. ... and the applications of …
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Ladle furnace reducing slag is a common byproduct in steelmaking of carbon and low alloy steels. After air cooling and weathering over several days, this material is completely ground into fine white particles. Physical, chemical, and crystalline characterizations were performed in order to verify possibilities for its direct application …
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A promising type of steel slag for applications is the ladle furnace (LF) slag, which is also known as the basic slag, the reducing slag, the white slag, and the …
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The conversion of iron to steel results in different types of steel slags. Depending on how these slags are formed, they are classified into basic oxygen furnace …
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The chemical compositions of ladle slag can exhibit variations due to the furnace type, the furnace load's composition, the steel grades being produced, and the operational methods of each furnace . Ladle slag typically has a high CaO content, though it falls towards the lower end of the typical range (45–62% by weight).
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2.2. Ladle Furnace Slag (LFS) The LFS used in this research was provided by a Spanish company which produces carbon steel pipes by melting scrap in an Electric Arc Furnace and then refining it in a Ladle Furnace. The LFS, obtained after spontaneous cooling, is a grayish-white powdery material, with a particle size of 0/2 mm.
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The ladle furnace (LF) is widely used in the secondary steelmaking process in particular for the de-sulfurization, alloying, and reheating of liquid steel prior to the casting process. The Effective …
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