The invention relates to a method for producing stainless steels, in
particular steels containing chromium and chromium-nickel. The method is
carried out in a melting device containing a metallurgical vessel, or in
a melting device (1) containing at least two vessels (2, 3) for supplying
a steel-casting installation, an electric arc furnace process (1) and an
air-refining process taking place alternately in the two vessels (2, 3).
To improve the efficiency of a method of this type, the aim of the
invention is to carry out a reversible treatment of unreduced converter
slag in the electric-arc furnace mode. To achieve this, in the first
treatment stage, the slag (19) with a high chromium content is melted
together with the added charge, the slag is then reduced during the
melting process with the silicon and carbon under favorable thermodynamic
conditions of the arc, once the slag has reached a minimum temperature of
1,490.degree. C. and the slag is subsequently removed. The air-refining
process is then carried out, during which the carbon content is reduced
to a value of less than 0.9%. The metal slag (18) is tapped at a tapping
temperature of between 1,620 and 1,720.degree. C., the unreduced slag
(19) with a high chromium content from the air-refining process remaining
in the treatment vessel.