METHOD AND INSTALLATION FOR PRODUCING AND INCREASING THE ANNUAL PRODUCTION YIELD OF LARGE-SCALE STEEL PRODUCTS OR HIGH-QUALITY STEEL PRODUCTS IN A TWO-VESSEL INSTALLATION

摘要

The invention relates to a method and an installation for the large-scale production of steel products or the production of high-quality, different steel products in a two-vessel installation (1), said method and installation improving the crude steel yield for a melting bath depth (15) of approximately 1,000 mm to 1,800 mm. According to the invention, the buoyancy plumes (14a) of the porous bottom plugs (14) are adjusted to within a respective minimum distance (16) of 2/3 in relation to the edge of the melting bath (17) and to a distance (18) of 1/3 in relation to the centre of the melting bath (19) with a blowing angle of alpha = 15° to 40° for the nozzles (6b) of an oxygen top-blowing lance (6) in relation to the vertical and the buoyancy plumes (14a) are formed with a maximum 2 Nm3 of argon or nitrogen per minute and per porous bottom plug (14).