Title: Thermochemical and thermophysical property measurements in slag systems

Authors: Taishi Matsushita, Miyuki Hayashi, Seshadri Seetharaman

Addresses: Department of Materials Science and Engineering, Royal Institute of Technology, Brinellvagen 23, SE 100 44, Stockholm, Sweden. ' Department of Chemistry and Materials Science, Tokyo Institute of Technology, 2 12 1 Ookayama, Meguro-ku, Tokyo 152 8552, Japan. ' Department of Materials Science and Engineering, Royal Institute of Technology, Brinellvagen 23, SE 100 44, Stockholm, Sweden

Abstract: This paper reviews developments on experimental methods and results of thermochemical and thermophysical property measurements of molten silicate slag systems and its theoretical achievements. Several selected topics are focused on, including experimental procedure and measurements of viscosity, density, surface-interfacial tension, thermal conductivity, thermal diffusivity and velocity and absorption coefficient of ultrasonic waves. Thermal conductivity and diffusivity of slags have been mainly measured by the transient techniques such as the laser flash and hot wire methods. Most of the measurements for velocity and absorption coefficient of ultrasonic waves are carried out using a pulse technique. The reliable data for thermochemical and thermophysical properties are required for the optimisation of metallurgical processes and the data is needed in order to improve the numerical models of processing. For academic interest, the results were discussed from the viewpoint of slag structure, as these properties are closely related to the slag structure.

Keywords: slags; silicates; molar volumes; viscosity; thermal diffusivities; thermal conductivity; surface tensions; interfacial tensions; velocity; ultrasonic waves; absorption coefficient; thermochemical properties; thermophysical properties; molten silicate slag; high temperature metallurgy.

DOI: 10.1504/IJMPT.2005.006464

International Journal of Materials and Product Technology, 2005 Vol.22 No.4, pp.351 - 390

Published online: 10 Mar 2005 *

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