Chair “Materials Technology”, Volgograd State Technical University (Volgograd, Russia):

Gonik I. K., Cand. Eng., Ass. Prof., e-mail: gonik@vstu.ru
Zyuban N. A., Dr. Eng., Prof., Head of the Chair
Novitskiy N. A., Postgraduate Student

The present work describes the study of the physical properties of briquetted charge material — oxide coal briquette. The main purpose of research is to find the submitted values of thermal conductivity at various temperatures of briquette heating. The technique and the results of the experimental work are shown. Initially briquettes have been heated up to 950 °С. Analysis of the built temperature relationships has revealed that heating rate of the briquettes included in the 1^st series increased and, reaching 600 °С level, briquette temperature both on its surface and in axial area exceeds the furnace temperature. In the meantime briquettes of the 2^nd series are heated only up to the furnace temperature. It is concluded that thermal conductivity ratio of the researched samples of briquetted charge materials increases with temperature rise. The results of experiments have displayed that thermal conductivity ratio of oxide-carbon briquettes that have been subjected to only drying at 200 °С is lower than thermal conductivity ratio of rolling scale (the main briquette component), due to porous structure of briquettes. Additionally, thermal conductivity ratio of briquettes that have been subjected to reducing calcination at 800 °С corresponds to the values of thermal conductivity ratio of metallized pellets, owing to variation of the structure during calcination and pre sence of metal phase in their composition.

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2. Gonik I. L., Bondareva O. P., Novitskiy N. A., Tyupina A. G. Issledovanie makro- i mikrostruktury oksidouglerodnykh briketov posle vosstanovitelnogo obzhiga (Research of macro- and microstructure of oxide-carbon briquettes after reduction roasting). Izvestiya Volgogradskogo Gosudarstvennogo Tekhnicheskogo Universiteta. Seriya “Problemy materialovedeniya, svarki i prochnosti v mashinostroenii” — Reports of Volgograd State Technical University. Series «Problems of materials science, welding and strength in mechanical engineering». 2012. No. 9, Iss. 6. pp. 76–78.
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