Radiation–Conduction Heat-Transfer Study for Mold Flux by Thermoviewer-Enhanced Infrared Emitter Technique

Wang, Wanlin; Zhang, Kaixuan; Zhang, Haihui

doi:10.1007/s11663-019-01521-3

Cited by 2 publications

(2 citation statements)

References 52 publications

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“…Numerous authors have investigated the heat transfer in liquid slags and fused salts [28][29][30][31][32][33][34]. In the low temperature range (between 400 and 800°C) the fused halides and nitrates show almost complete transparency and the investigators have used considerable experimental sophistication to measure the small contribution to heat flow of phonon conductivity in the absence of heat transfer by a radiation mechanism.…”

Section: Heat Transfer In Liquid Slagsmentioning

confidence: 99%

“…It is to be anticipated that the presence of CaF 2 crystals in an ESR slag film would have the same effect since as seen in Figure 1, CaF 2 is optically transparent in this wavelength range. Wang [30] notes that in the case of a continuous casting solid flux film photon transfer accounts for 73% of the total heat transmission to the mould. However, the question of the influence of photon conductivity on the structure of heat balances in liquid slags and fluxes has largely been neglected with work on the topic generally focussed on the alternative of relating the phonon conductivity to the chemical structure of the liquid concerned [35,61,62].…”

Section: Heat Transfer In Liquid Slagsmentioning

confidence: 99%

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Heat transfer in ESR slags

Mitchell

Kelkar

2021

Ironmaking & Steelmaking

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The extensively published models of the ESR process assume a singular value of the slag thermal conductivity and employ that value in a format which assumes heat conduction entirely by a phonon mechanism. In this work we investigate the possibility that the mechanism is a phonon/ photon mechanism in a slag which is diathermanous. The conclusion is that such a model assumption better represents the practical behaviour of the process and should be used in model structures. It is also suggested that the concept has a wider application to other metallurgical processes which use slags having some degree of photon conductivity.

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Section: Heat Transfer In Liquid Slagsmentioning

confidence: 99%

Section: Heat Transfer In Liquid Slagsmentioning

confidence: 99%

Heat transfer in ESR slags

Mitchell

Kelkar

2021

Ironmaking & Steelmaking

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The Methodology Development for Improving Energy Utilization and Reducing Fluoride Pollution of the Electroslag Remelting Process: A Review

Duan

2020

steel research int.

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Traditional electroslag remelting (ESR) technology using the slag with a high CaF2 content is faced with a high specific power consumption and fluoride pollution. Under double pressure, it is therefore very important to have a good understanding of the ESR process. The energy utilization, η, of the ESR depends on both the electrical, ηE, and thermal efficiency, ηH. Tailoring slag composition is one of the useful techniques to enhance energy utilization, because slag is very important to generate Joule heat for melting electrodes, control horizontal heat transfer, and maintain uniform distribution of alloy elements from the bottom to top of the remelted ingots in the ESR process. Therefore, herein, the aim is to review the effects of slag composition, especially CaF2 content, and temperature on the electrical conductivity and thermal conductivity, which further influence the heat balance during the ESR process. The volatilization mechanism of the liquid fluoride‐containing slag at an elevated temperature is introduced from the perspective of thermodynamics and kinetics. Meanwhile, some of the recent advances and technology improvements in energy utilization and productivity enhancements for the ESR process are summarized, which provide benefits to achieve sustainable development for the ESR process.

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Radiation–Conduction Heat-Transfer Study for Mold Flux by Thermoviewer-Enhanced Infrared Emitter Technique

Cited by 2 publications

References 52 publications

Heat transfer in ESR slags

Heat transfer in ESR slags

The Methodology Development for Improving Energy Utilization and Reducing Fluoride Pollution of the Electroslag Remelting Process: A Review

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