Utilization of Ladle Furnace slag from a steelwork for laboratory scale production of Portland cement

Vilaplana, Aitana Sáez-de-Guinoa; Ferreira, Víctor J.; López-Sabirón, Ana M.; Aranda‐Usón, Alfonso; Lausín-González, Cristina; Berganza-Conde, Cecilia; Ferreira, Germán

doi:10.1016/j.conbuildmat.2015.07.075

Cited by 81 publications

(32 citation statements)

References 52 publications

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“…The quantity of free lime in our samples remains less than 2% which is in agreement with the quantity of free lime of industrial Portland cement. Moreover, this result is also consistent with the amount of free lime in Portland cement reported in the literature [16].…”

Section: X-ray Fluorescence Analysis and Free Lime Contentssupporting

confidence: 82%

Alumina sludge's Influence on the physicochemical characteristics of CPJ₅₅ cement

Dahhou

Barbach²,

2018

MATEC Web Conf.

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Abstract. Partial replacement of the Portland cement CPJ 55 ingredients by various quantities of alumina sludge (AS), produced during drinking water plant sludge, was used in the preparation of mortar mold with dimensions 40×40×160 mm. The characterization of materials is carried out by X-ray fluorescence (XRF), Xray diffraction (XRD), free lime dosing, and the mechanical tests. Analysis of the chemical composition by XRF shows that the studied alumina sludge is mainly composed of aluminum oxide, silica, which is correlated with the principal mineral phases identified in the XRD analysis results. It is demonstrated that adding 5% of the alumina sludge in Portland cement does not affect the mineralogy of final product. Nevertheless, the compression and flexural strength tests (in 28 days) conducted on mortar sample comprising 5% sludge elucidate that it belongs to cement mortar class of type 32.5 R.

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Section: X-ray Fluorescence Analysis and Free Lime Contentssupporting

confidence: 82%

Alumina sludge's Influence on the physicochemical characteristics of CPJ₅₅ cement

Dahhou

Barbach²,

2018

MATEC Web Conf.

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“…The reuse of LF slag (LFS) or secondary slag, a by-product from the basic refining of steel, is less widespread, due to its dusty appearance [18,19]. LFS presents hydraulicity that provides it with slightly cementitious properties [20,21], thus the addition of LF slag is mainly explored when preparing Portland cement mixtures [20,22,23]. The potential of LFS in building and construction research has also been studied, mainly to replace cement and lime in varied applications, such as mortars and concrete [24,25,26], plasterboard [27], and soil stabilization [28], among others.…”

Section: Introductionmentioning

confidence: 99%

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

et al. 2019

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Electric arc furnace slag (EAFS) and ladle furnace slag (LFS) are by-products of the electric steelmaking sector with suitable properties for use in bituminous mixtures as both coarse and fine aggregates, respectively. In this research, the production of a porous asphalt mixture with an aggregate skeleton consisting exclusively of electric steelmaking slags (using neither natural aggregates nor fillers) is explored. The test program examines the asphalt mixtures in terms of their mechanical performance (abrasion loss and indirect tensile strength), durability (cold abrasion loss, aging, and long-term behavior), water sensitivity, skid and rutting resistance, and permeability. The results of the slag-mixes are compared with a standard mix, manufactured with siliceous aggregates and cement as filler. The porous mixes manufactured with the slags provided similar results to the conventional standard mixtures. Some issues were noted in relation to compaction difficulties and the higher void contents of the slag mixtures, which reduced their resistance to raveling. Other features linked to permeability and skid resistance were largely improved, suggesting that these mixtures are especially suitable for permeable pavements in rainy regions. In conclusion, a porous asphalt mixture was produced with 100% slag aggregates that met current standards for long-lasting and environmentally friendly mixtures.

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“…In the electric steelmaking, the electric arc furnace (EAF) and LF slags are quantitatively a major by-product. 9) The slag itself can have many applications, such as cement material 10,11) or as a flux in the steel industry. 12) Due to the high production rate and usability of the slags, the valorization of slags has gained a lot of interest in the steel…”

Section: Introductionmentioning

confidence: 99%

Industrial Ladle Furnace Slag Composition Analysis with Optical Emissions from the Arc

Pauna

Aula

Seehausen³

et al. 2020

ISIJ Int.

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With the strict standards for steel quality and high production rates, the demand for faster and more convenient slag composition analysis for both electric arc and ladle furnaces has become a major issue in industrial steel plants. To overcome the time-delay between slag sampling and results of the slag composition analysis, an on-line slag composition analysis is required. Such a method that can be used in on-line analysis and is also chemically sensitive to the slag composition is optical emission spectroscopy. In this work, the optical emissions from the arc have been measured in an industrial ladle furnace and used for slag composition analysis. This article focuses on CaF 2 and MgO, since the CaF 2 is a common additive material in the ladle treatment and high MgO content means that the ladle refractory lining is dissolving into the slag. The analysis has been carried out by comparing emission line ratios to the XRF analyzed ratios of CaF 2 /MgO and MnO/MgO, respectively. The results show that several atomic emissions lines of calcium, magnesium, and manganese can be used to evaluate the CaF 2 /MgO and MnO/MgO ratios in the slag. It was found out that the plasma temperature derived from Ca I emission lines has a non-linear relation with the CaF 2 content of the slag. Additionally, the dissociation pathways of molecular slag components were determined and studied in different plasma temperatures with equilibrium composition computation in order to determine the relations between the slag and plasma compositions.

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Utilization of Ladle Furnace slag from a steelwork for laboratory scale production of Portland cement

Cited by 81 publications

References 52 publications

Alumina sludge's Influence on the physicochemical characteristics of CPJ₅₅ cement

Alumina sludge's Influence on the physicochemical characteristics of CPJ₅₅ cement

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

Industrial Ladle Furnace Slag Composition Analysis with Optical Emissions from the Arc

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Utilization of Ladle Furnace slag from a steelwork for laboratory scale production of Portland cement

Cited by 81 publications

References 52 publications

Alumina sludge's Influence on the physicochemical characteristics of CPJ55 cement

Alumina sludge's Influence on the physicochemical characteristics of CPJ55 cement

Performance and Durability of Porous Asphalt Mixtures Manufactured Exclusively with Electric Steel Slags

Industrial Ladle Furnace Slag Composition Analysis with Optical Emissions from the Arc

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Product

Resources

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Alumina sludge's Influence on the physicochemical characteristics of CPJ₅₅ cement

Alumina sludge's Influence on the physicochemical characteristics of CPJ₅₅ cement