Thermophysical Property Measurements of Molten Slag and Welding Flux by Aerodynamic Levitator

Onodera, Kenta; Nakamura, Airi; Hakamada, Shinya; Watanabe, Masaru; Kargl, Florian

doi:10.1007/978-3-319-48769-4_99

Cited by 3 publications

(3 citation statements)

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“…During the measurement, the suspended droplet oscillates at the same frequency as the input acoustic signal; the oscillation generator is important for slag viscosity measurement. [ 69,70 ] The method was exemplified to measure the viscosity of CaO–Al 2 O 3 –SiO 2 slag at high temperature (2229–2800 K) [ 71 ] and found with a moderate uncertainty (<10%) at 2273–2800 K. [ 50 ] The viscosity is determined as

\mu = \frac{3 W}{20 \pi R_{\text{slag}} t_{0}}

where W is the sample mass, R s lag is the slag radius and t 0 is the damping time constant of surface tension oscillation.…”

Section: Thermophysical Property Characterizationmentioning

confidence: 99%

“…IAM [49] CaO-SiO 2 -Al 2 O 3 -MgO 1773-2073 2.59-2.56 0.36 AM [51] CaO-SiO 2 -Al 2 O 3 -MgO 1773-1823 3.95-3.71 2.88 AM [29] CaO-SiO 2 -Al 2 O 3 -MgO-TiO 2 1723-1823 2.67-2.66 AE2.0 SDM [34] Synthetic coal ash 1473-1873 2.33-2.16 AE10.0 ALM [69] CaO Shu et al [52] ρ¼…”

Section: Assessment Of Blast Furnace Slag Densitymentioning

confidence: 99%

“…During the measurement, the suspended droplet oscillates at the same frequency as the input acoustic signal; the oscillation generator is important for slag viscosity measurement. [69,70] The method was exemplified to measure the viscosity of CaO-Al 2 O 3 -SiO 2 slag at high temperature (2229-2800 K) [71] and found with a moderate uncertainty (<10%) at 2273-2800 K. [50] The viscosity is determined as…”

Section: Measurement Techniquesmentioning

confidence: 99%

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High‐Temperature Thermophysical Property Characterization of Molten Blast Furnace Slag: A Critical Reviews

Liu

et al. 2023

steel research int.

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Centrifugal granulation‐assisted thermal energy recovery (CGATER) remains the leading technology for the iron and steel industry to enable the low‐carbon treatment of high‐temperature blast furnace (BF) slag. Accurate knowledge of the thermophysical properties of BF slag is pivotal for the commercialization of the CGATER. However, it presents a formidable task to obtain these quantities due to the extremely high temperature of molten BF slag (≈1500 °C). To date, the thermophysical properties of BF slag have not been well characterized yet. Herein, five typical thermophysical properties including density, viscosity, surface tension, thermal conductivity, and emissivity are scrutinized with emphasis on the experimental measurements and empirical estimates. The working principles of these measurement methods are briefly overviewed and their merits and demerits are highlighted. It is noted that density, viscosity, and surface tension have been intensively studied; the quantities can be estimated with moderate uncertainty. However, the thermal conductivity and emissivity of BF slag are less tackled, mainly because of the scarcity of measurement tools at high temperatures. In the future, innovative measurement tools tailored for high‐temperature materials are essential, not only for enriching the thermophysical property database of BF slag but also for paving the way toward characterizing other complex high‐temperature melts.

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\mu = \frac{3 W}{20 \pi R_{\text{slag}} t_{0}}

where W is the sample mass, R s lag is the slag radius and t 0 is the damping time constant of surface tension oscillation.…”

Section: Thermophysical Property Characterizationmentioning

confidence: 99%

Section: Assessment Of Blast Furnace Slag Densitymentioning

confidence: 99%

“…During the measurement, the suspended droplet oscillates at the same frequency as the input acoustic signal; the oscillation generator is important for slag viscosity measurement. [69,70] The method was exemplified to measure the viscosity of CaO-Al 2 O 3 -SiO 2 slag at high temperature (2229-2800 K) [71] and found with a moderate uncertainty (<10%) at 2273-2800 K. [50] The viscosity is determined as…”

Section: Measurement Techniquesmentioning

confidence: 99%

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