Method of production of steel has a low nitrogen content in a furnace bag

摘要

The present invention relates to a method of producing steel in a furnace pocket in which the molten steel is agitated by injection of inert gas into the lower part of the furnace. / p & & p & according to the invention, the stirring of the steel bath is made by injection of gaseous argon so as to be distributed homogeneously the additives added in the course of treatment, while the are injected simultaneously of the liquid argon at - the top of the surface of the bath in the zone of intumescence. It is thus possible to substantially increase the nitrogen concentration of the steel bath during the course of treatment. In some cases, and in particular during the use of welding rods of the type of silico - calcium, there was a decrease in the concentration of nitrogen in the steel bath.