Mixture, use of this mixture, and method for conditioning a slag located on a metal melt in a metallurgical vessel in iron and steel metallurgy

Abstract

The invention relates to a mixture to be introduced into the slag located on a metal melt in iron and steel metallurgy, the use of such a mixture, and a method for conditioning a slag located on a metal melt in a metallurgical vessel, for example in a converter, in an electric arc furnace or in a ladle, in iron and steel metallurgy.

1 . A mixture to be introduced into the slag located on a metal melt in iron and steel metallurgy, said mixture comprising the following components in the following mass proportions:
 raw dolomite in a range from 10 to 90 mass %;   one or more further components comprising at least the following constituents:   MgO and carbon, in a range from 90 to 10 mass %.   
     
     
         2 . The mixture according to  claim 1  with a proportion of raw dolomite in a range from 10 to 55 mass %. 
     
     
         3 . The mixture according to  claim 1 , in which the further components are present in the form of magnesia-carbon and caustic magnesite. 
     
     
         4 . The mixture according to  claim 1 , in which the mixture comprises further components in the form of magnesia-carbon and caustic magnesite in the following mass proportions:
 magnesia-carbon: 10 to 50 mass %;   caustic magnesite: 10 to 50 mass %.   
     
     
         5 . The mixture according to  claim 1 , which mixture is present in the form of pellets. 
     
     
         6 . A method for conditioning a slag located on a metal melt in a metallurgical vessel in iron and steel metallurgy, said method comprising the following steps:
 providing a mixture, said mixture comprising the following components in the following mass proportions:
 raw dolomite in a range from 10 to 90 mass %; 
 one or more further components comprising at least the following constituents:
 MgO and 
 carbon, in a range from 90 to 10 mass %; and 
 
 introducing the mixture into the slag located on the metal melt in the metallurgical vessel. 
   
     
     
         7 . A method for using a mixture for conditioning a slag located on a metal melt in a metallurgical vessel in iron and steel metallurgy, said mixture comprising the following components in the following mass proportions:
 raw dolomite in a range from 10 to 90 mass %;   one or more further components comprising at least the following constituents:
 MgO and 
 carbon, in a range from 90 to 10 mass %.