High-Temperature Properties of Mold Flux Observed and Measured In Situ by Single/Double Hot-Thermocouple Technique

Wang, Wanlin; Lyu, Peisheng; Zhou, Lejun; Li, Huan; Zhang, Tongsheng

doi:10.1007/s11837-018-2907-z

Cited by 17 publications

(5 citation statements)

References 91 publications

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“…In situ observation of particle dissolution as conducted on the SHTT apparatus, which was established by Kashiwaya et al, had become a routine approach for investigating the crystallization of mold flux . However, it had rarely been applied in inclusion dissolution experiments.…”

Section: Methodsmentioning

confidence: 99%

Inclusions Absorbed by Slags in Interstitial‐Free Steel Production

Wang

et al. 2019

steel research int.

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The nonmetallic inclusions absorbed by ladle slags during secondary steelmaking operations and in the tundish and mold during casting are crucial to the production of interstitial-free (IF) steel. However, little to no research has been conducted on the separation and dissolution of inclusions along with a focus on IF steel. Herein, a theoretical study of the separation of solid alumina at the steel-slag interface is conducted. The dissolution of alumina particles is observed in situ in different IF steel slags, and the dissolution mechanism is analyzed. The results show that the interfacial tensions and slag viscosity have a large influence on the predicted displacement, but for IF steel production, the dissolution of inclusions in the slags has a greater influence on the removal of inclusions than on inclusion separation. Using ladle slags with a proper CaO wt%/Al 2 O 3 wt% is the most effective way to remove the Al 2 O 3 inclusions compared with the other slags in IF steel production.

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Section: Methodsmentioning

confidence: 99%

Inclusions Absorbed by Slags in Interstitial‐Free Steel Production

Wang

et al. 2019

steel research int.

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“…So the SHTT is widely used in glass, ceramics and other fields of melting, continuous cooling crystallization and constant temperature crystallization. [18][19][20] Fred Ordway 19) pointed out that the molten slag will form droplets on the thermocouple of SHTT due to capillary action. Wang, Zhou et al proposed that the contact angle of the slags droplets with thermocouple can be obtained by SHTT 21) and combining the double hot thermocouple technique (DHTT) and Young's equation can get the slagmetal interfacial tension.…”

Section: Novel Methods For Determining the Interfacial Properties Of Mmentioning

confidence: 99%

Novel Method for Determining the Interfacial Properties of Melt Slags Based on Single Hot Thermocouple Technique

et al. 2019

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“…Melting and crystallization behaviors of these waste electrolyte added mold fluxes were tested by SHTT. Figure 1 shows the schematic diagram of its apparatus, [23,24] and Figure 2 shows the temperature control process during these tests. For the melting test, the mold flux powder was placed on the U-shaped thermocouple first at 873 K (600 °C), and then it was heated to 1773 K (1500 °C) with a heating rate of 15 K (°C s À1 ) as shown in stage I in Figure 2.…”

Section: Shtt Testsmentioning

confidence: 99%

Melting and Crystallization Behaviors of Mold Flux with the Addition of Waste Electrolyte

Yang,

Wang,

Zhou

et al. 2023

steel research int.

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The influence of waste fluoride electrolyte addition on key properties of mold flux was investigated, with the aim to convert the hazardous waste in electrolytic aluminum industry into treasure in steel industry. The results show that the initial melting temperature of mold fluxes decreases from 1614.40 K (1341.40 °C) to 1564.67 K (1291.67 °C), and the complete melting temperature decreases from 1704.45 K (1431.45 °C) to 1674.34 K (1401.34 °C) with the addition of waste electrolyte from 10.08 wt. % to 24.89 wt. %. The crystallization of mold flux is enhanced, and its crystallization mechanism transforms from ‘constant nucleation rate and two‐dimensional growth’ into ‘constant nucleation number and three‐dimensional growth’ with the addition of waste electrolyte. The main precipitated crystals in mold fluxes are grossular (Ca3Al2(SiO4)3) and CaF2, but the phase transforms into gehlenite (Ca2(Al(AlSi)O7) at higher temperature. In addition, the crystallization activation energy is 13.80 kJ/mol, 12.40 kJ/mol, 12.01 kJ/mol, 11.03 kJ/mol and 10.27 kJ/mol, respectively, which further confirms that the addition of waste electrolyte can reduce the energy barrier of crystallization and promote the crystallization ability of mold flux.This article is protected by copyright. All rights reserved.

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High-Temperature Properties of Mold Flux Observed and Measured In Situ by Single/Double Hot-Thermocouple Technique

Cited by 17 publications

References 91 publications

Inclusions Absorbed by Slags in Interstitial‐Free Steel Production

Inclusions Absorbed by Slags in Interstitial‐Free Steel Production

Novel Method for Determining the Interfacial Properties of Melt Slags Based on Single Hot Thermocouple Technique

Melting and Crystallization Behaviors of Mold Flux with the Addition of Waste Electrolyte

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