Premium
Heat transfer control by dispersed metallic particles in glassy mold flux film for continuous steel casting
Author(s) -
Hyun SungHee,
Cho JungWook
Publication year - 2020
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.17294
Subject(s) - materials science , thermal conduction , heat transfer , thermal conductivity , heat flux , analytical chemistry (journal) , heat transfer coefficient , flux (metallurgy) , particle (ecology) , composite material , casting , thermodynamics , metallurgy , chemistry , physics , oceanography , chromatography , geology
To assess the effect of metallic particles (MPs) on heat transfer in glassy mold flux, a structurally stable glassy mold flux system composed of CaO–Al 2 O 3 –CaF 2 was examined with 0, 2, or 5 wt% of FeO or Fe MPs. The change of extinction coefficient by Mie Scattering of the Fe particles and absorption by FeO was quantified using Fourier transformation infrared ray spectroscopy and an Ultraviolet/Visible spectrometry. Thermal conductivity of mold flux film with dispersed MPs was quantified using laser flash technique. One‐dimensional Debye temperature was calculated, and particle morphology and size distribution were observed using image analysis to explain variations in thermal conductivity among the glass samples. Finally, to simulate the heat transfer ratio by both the conduction and radiation, the actual heat flux through mold flux film was measured using an Infrared Emitter Technique. The overall heat transfer rate across liquid flux film could be reduced significantly by a dispersion of MPs.