Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Measurement of Thermal Diffusivity of Fired and Nonfired Pellets by Laser Flash Method
Hiromichi OHTATomohiro AKIYAMAIn-kook SUHReijiro TAKAHASHIJun-ichiro YAGIYoshio WASEDA
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JOURNAL FREE ACCESS

1989 Volume 75 Issue 10 Pages 1877-1882

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Abstract

The nonfired pellets have received attention in ironmaking industries from the point of view of energy saving. However, the accurate and systematic measurements of thermal diffusivity of nonfired pellets have not been reported yet, although they are required for the heat transfer analysis of ironmaking process. For these requirements, thermal diffuisivities of three kinds of nonfired pellets containing 1.20, 3.72 and 8.43 mass% combined water have been determined by the laser flash method in the temperature range between room temperature and 1273 K, and were compared with that of a fired pellet.
Thermal diffusivity values of the nonfired pellets are found smaller than that of the fired pellet, and significantly depend on temperature and kinds of iron ore as raw material.
Laser flash method for measuring thermal diffusivity at high temperature has been successfully applied to various materials for its excellent character such as high response and non-contact method.

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© The Iron and Steel Institute of Japan
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