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Abstract

The techniques of blowing an inert gas or a mixture of an inert gas and a powder into a liquid bath are now used for treating hot metal in transfer ladles and torpedo ladles. The objective is to promote bath uniformity and improve the metallurgical efficiency of thermodynamic reactions in the torpedo ladles by optimizing stirring. This report is a contribution to the study of stirring phenomena and of reactions in the ladle after injections. The study was carried out firstly on hydrodynamic models, in which the hot metal is simulated by water, and then directly on a number of industrial locations. The results indicate the influence on optimum stirring conditions of : - the shape of the lance nozzle; - the position of the injection lance; - the nozzle orientation; - the beneficial effect of injecting powder; - the detrimental effects of the presence of slag and of ladle fouling; The results recorded on models coincide with those recorded on ladles in industrial use and demonstrate that an improvement in stirring conditions permits an increase in productivity.

Additional information

Authors: AUDEBERT S, IRSID, Saint-Germain-en-Laye (FR)
Bibliographic Reference: EUR 11683 FR (1988)
Availability: (2)
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