Method for producing stainless steels, in particul

专利名称：Method for producing stainless steels, in

particular high-grade steels containingchromium and chromium-nickel

发明人：Karl Reiner Gotzinger,Stefan Lembe,Johann

Reichel,Bernt Rollinger

申请号：US10399007申请日：20030721

公开号：US20040099091A1公开日：20040527

专利附图：

摘要：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 meltingdevice containing a metallurgical vessel, or in a melting device () containing at least twovessels () for supplying a steel-casting installation, an electric arc furnace process () andan air-refining process taking place alternately in the two vessels (). To improve theefficiency of a method of this type, the aim of the invention is to carry out a reversibletreatment of unreduced converter slag in the electric-arc furnace mode. To achieve this,in the first treatment stage, the slag () with a high chromium content is melted togetherwith the added charge, the slag is then reduced during the melting process with thesilicon and carbon under favourable thermodynamic conditions of the arc, once the slaghas reached a minimum temperature of 1,490° C. and the slag is subsequently removed.The air-refining process is then carried out, during which the carbon content is reduced toa value of less than 0.9%. The metal slag () is tapped at a tapping temperature of

between 1,620 and 1,720° C., the unreduced slag () with a high chromium content from theair-refining process remaining in the treatment vessel.

申请人：GOTZINGER KARL REINER,LEMBE STEFAN,REICHEL JOHANN,ROLLINGERBERNT

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