Community Research and Development Information Service - CORDIS

Abstract

The conventional lubrication in continuous casting with a submerged nozzle is ensured by powder depositions on the liquid steel meniscus. Thanks to its contact with the high temperature steel, the power melts. The mould's oscillation movement produces at the meniscus a pumping effect so that the powder penetrates into the gap between the mould and the solidified shell and creates a lubricating flux film. This lubrication technique is not optimal: the friction forces in the mould remain important, and the heat transfer is sometimes heterogeneous. The aim of this project was to experiment with a new technique: the injection of an appropriate lubricant directly into the gap, through the copper plates, to create a flux film in situ. Four steps were successively realized during the research:

- Definition of category of lubricants able to satisfy the relevant conditions;
- Perfection of the injection device for powers in the form of spherical particles;
- Injection trials during casting;
- The continuous casting line was modified in order to accomplish trials under dynamic conditions.

The technique of injection of lubricating powder with spherical particles by means of an argon-pressurized container has proved its reliability during cold trials. Nevertheless, the continuous casting trials have revealed the limits of the technique. nique.

Additional information

Authors: WILMOTTE S, Centre de recherches métallurgiques, Liège (BE);COURBE P, Centre de recherches métallurgiques, Liège (BE)
Bibliographic Reference: EUR 16036 FR (1997) 54pp., FS, ECU 10
Availability: Available from the (2)
ISBN: ISBN 92-828-0232-9
Record Number: 199710752 / Last updated on: 1997-06-23
Category: PUBLICATION
Original language: fr,en
Available languages: fr,en