Community Research and Development Information Service - CORDIS


Refractory materials used in steel production are usually pre-heated with burners but this has many disadvantages (damage to the refractory material, long warm-up times, long change-over periods, local air pollution, etc.) This project investigated the use of inductive heating of the refractory material with particular respect to the pre-heating of submerged pouring tubes and comparison with the convention procedure identified the following advantages: uniform heating thus avoiding the creation of thermal stresses, a reduced pre-heating time requirement and a consequent reduction in surface damage, elimination of combustion gases. Inductive heating can also be continued as and when required during the casting operation which inhibits the formation of bridges between the submerged pouring tubes and the casting. The procedure is also advantageous in the close-to-final-dimension stages because the separation distances between the ceramic material and the cooled metal surface are much reduced. During the investigation, emphasis was placed upon the development of ceramics which are rendered electrically conductive by the incorporation of carbon and of other ion-conductive components. Mathematical modelling was used to investigate the influence of geometric and electrical parameters.

Additional information

Authors: LITTERSCHEIDT H, Thyssen Stahl AG
Bibliographic Reference: EUR 18513 DE (1998) 58pp
Availability: Available from OOPEC Sales agents
ISBN: ISBN 92-828-4694-6
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