Steel treatment with calcium-aluminate synthetic slag and addition of titanium oxide

Putan, A; Putan, Vasile; Hepuţ, Teodor; Socalici, Ana

doi:10.3989/revmetalm.1210

Cited by 8 publications

(6 citation statements)

References 2 publications

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“…The synthetic slags containing marble waste reached the maximum desulfurization yield of 6.7 wt% with 1.3 poise of effective viscosity. The presence of solid phase increased the slag viscosity, which can impaired the interaction between steel and slag (Putan et al, 2013). However, the presence of solid CaO up to a certain limit is beneficial to the desulfurization process, as it was discussed previously.…”

Section: Influence Of Viscositymentioning

confidence: 75%

Elaboración de escorias sintéticas con residuos de mármol y óxido de aluminio utilizados en el proceso de desulfuración de acero

Grillo

Coleti

Junca³

et al. 2020

REVMETAL

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El objetivo de este trabajo es investigar el proceso de desulfuración del acero utilizando escorias sintéticas que contienen residuos de mármol y óxido de aluminio. Las pruebas se realizaron usando un acero SAE 1020 que contenía 80 ppm de azufre. La temperatura fue 1600 °C bajo un flujo de argón de 1NL/minuto. Cada prueba de desulfuración duró 30 min. Se retiraron muestras de acero del baño cada 5 min. Posteriormente, cada muestra se caracterizó en un espectrómetro infrarrojo LECO CS240 para determinar el contenido de azufre. Los resultados indicaron un rendimiento de desulfuración de 78,7% y 70% en peso para escorias que contienen óxido de aluminio y residuos de mármol, respectivamente. Con estos resultados fue posible concluir que la fracción de la fase líquida influye en el rendimiento de desulfuración. El rendimiento máximo de desulfuración se alcanzó con 83,2% y 82,0% en peso de la fase líquida para escorias que contenían óxido de aluminio y residuos de mármol, respectivamente. Además, en las escorias que contienen cal, el rendimiento máximo de desulfuración se alcanzó con 85,0% en peso de la fase líquida. Las pruebas también demostraron que en los procesos de desulfuración es necesario contener una fase sólida de CaO en la composición de escoria sintética para alcanzar el rendimiento máximo de desulfuración. Por lo tanto, el uso de óxido de aluminio en lugar de fluorita es una alternativa interesante para la desulfuración del acero, así como el reemplazo de la cal por los residuos de mármol.

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Section: Influence Of Viscositymentioning

confidence: 75%

Elaboración de escorias sintéticas con residuos de mármol y óxido de aluminio utilizados en el proceso de desulfuración de acero

Grillo

Coleti

Junca³

et al. 2020

REVMETAL

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“…Their mixture can be considered as a potential precursor of a CaO–Al 2 O 3 –TiO 2 slag for steel refining. 62 Moreover, their fractions were free from iron, as iron was eluted with ethanol in the initial fraction, along with silicon. The iron-silicate fraction could be considered as a resource for abrasives for blast cleaning.…”

Section: Results and Discussionmentioning

confidence: 99%

Separation of Scandium from Hydrochloric Acid–Ethanol Leachate of Bauxite Residue by a Supported Ionic Liquid Phase

Avdibegović

Binnemans

2020

Ind. Eng. Chem. Res.

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Solvometallurgy is a new branch of extractive metallurgy in which green organic solvents are used instead of aqueous solutions to improve selectivity in separation processes. In the present study, nonaqueous leaching of a Greek bauxite residue (BR) was performed and scandium was separated from other elements in the leachate by column chromatography. At first, the selectivity of sorbents for scandium(III) over iron(III) was tested in batch mode using various organic solvents. The following three sorbents were tested: (1) a carboxylic acid-functionalized supported ionic liquid phase (SILP), (2) silica (SiO 2 ), and (3) silica functionalized with ethylenediaminetetraacetic acid (SiO 2 –TMS–EDTA). The best separation of scandium and iron was achieved from ethanolic solution by the SILP. The BR was then leached with 0.7 mol L –1 HCl in ethanol or in water. The leaching efficiency of scandium with both lixiviants was similar. However, much less sodium was leached, and silica remained in solution when leaching was performed with the ethanolic lixiviant. By using ethanol as opposed to water, the serious drawback of silica gel formation that is taking place in the aqueous leachate of BR was circumvented. The sorption preference of the SILP for metal ions in the ethanolic leachate was partly reversed compared to the aqueous leachate. Iron was separated from other metals of the ethanolic BR leachate by a simple elution with ethanol. The formation of the anionic tetrachloroferrate(III) complex, [FeCl 4 ] − , enabled the selective elution. This complex was not observed in the aqueous leachate of BR. Scandium was separated from the vast majority of other components of the BR by elution with 0.1 mol L –1 H 3 PO 4 .

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“…The desulfurization flux equation is given in Eqs. [2] through [4]. [26,[30][31][32] The overall mass transfer coefficient calculated based on flux equation is shown in Figure 9.…”

Section: B Effect Of White Mud On Desulfurization Kinetics Of Molten Steelmentioning

confidence: 99%

“…IT is generally accepted that the lower the viscosity of slag, the more positive its desulfurization effect in ladle-refining process. [1] Putan et al [2] reported that steel-slag interfacial reaction rate decreased as the viscosity of the slag increased. Fluorspar (CaF 2 ) is one of the materials commonly used as a fluxing agent in ladle-refining stage to ensure a high liquid slag fraction of low viscosity.…”

Section: Introductionmentioning

confidence: 99%

Effect of White Mud Addition on Desulfurization Rate of Molten Steel

Jeong

Chung

et al. 2021

Metall Mater Trans B

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Fluorspar (CaF2) is commonly used to control the fluidity of slag in ladle-refining of steel. However, because it is desirable to reduce CaF2 consumption because of its environmental impacts, the industrial waste material such as white mud (WM) was investigated as a potential substitute for fluorspar. Steel sample (Fe-0.3C-0.9Mn-0.3Si-0.03Al-0.05S, mass pct) was melted in a high-frequency induction furnace, followed by additions of ladle slag (CaO-Al2O3-SiO2-5MgO-xCaF2, CaO/Al2O3=3, x = 0 to 10 mass pct) and fluxing agent (WM) at 1823 K (1550 °C). The desulfurization experiments were carried out by reducing CaF2 content in the ladle slag and increasing the addition of WM. Ladle slag with added WM showed an overall mass transfer coefficient of sulfur (kO) equivalent to or higher than that of conventional 10 mass pct CaF2-containing ladle slag. In a slag melting experiment based on DIN 51730 standard, the melting rate of mixed slag increased with the amount of WM added, which is considered to have a positive effect on the initial desulfurization rate. In addition, adding WM provided sulfide capacity of the slag equivalent to that of CaF2-containing slag. Consequently, the use of WM yielded slag having $$k_{{\text{O}}}$$ k O equivalent to or higher than that of conventional ladle slag with 10 pct CaF2, and thus, WM shows promise as a partial replacement for fluorspar.

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Steel treatment with calcium-aluminate synthetic slag and addition of titanium oxide

Cited by 8 publications

References 2 publications

Elaboración de escorias sintéticas con residuos de mármol y óxido de aluminio utilizados en el proceso de desulfuración de acero

Elaboración de escorias sintéticas con residuos de mármol y óxido de aluminio utilizados en el proceso de desulfuración de acero

Separation of Scandium from Hydrochloric Acid–Ethanol Leachate of Bauxite Residue by a Supported Ionic Liquid Phase

Effect of White Mud Addition on Desulfurization Rate of Molten Steel

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