Method for producing foamed slag

Abstract

A method of producing foamed slag in an arc furnace by measured blowing of a carbon carrier by means of an oxygen carrier into the boundary layer between the slag and molten metal layers or into zones of the slag or molten metal layer adjacent to the boundary layer in an amount such that arc are enveloped at least by a foamed slag layer.

1 - 7 . (canceled) 
     
     
         8 . A method for producing foamed slag in an arc furnace comprising blowing an admixture comprising a finely divided titanium carrier consisting of pure titanium dioxide and a carbon carrier into a boundary layer between a slag layer and a molten metal via an oxygen carrier, or into a zone of the slag layer or a molten metal that are adjacent to the boundary layer, in an amount such that arcs are enveloped at least partially by said foamed slag layer, into the arc furnace wherein the finely divided titanium carrier has a mean particle size d 50  of from 0.001 to 1.0 mm and a particle size of up to 5 mm, and wherein the content of titanium carrier, based on the carbon content, is from 1 to 80%. 
     
     
         9 . The method of  claim 8 , wherein 100% of the finely divided titanium carrier particles have a mean particle size of up to 200 microns. 
     
     
         10 . The method according to  claim 8 , wherein 100% of the finely divided titanium carrier particles have a mean particle size d 50  of up to 100 microns. 
     
     
         11 . The method according to  claim 8 , wherein the titanium dioxide is synthetic. 
     
     
         12 . A method for producing foamed slag in an arc furnace comprising blowing an admixture consisting of a carbon carrier and pure titanium dioxide having a mean particle size of from 0.001 to 1.00 mm and a particle size  d 50. 
     
     
         13 . A method for producing foamed slag in an arc furnace comprising blowing an admixture consisting of a carbon carrier and titanium carrier dioxide having a mean particle size of from 0.001 to 1.00 mm and a particle size  d 50. 
     
     
         14 . The method according to  claim 13 , wherein the titanium carrier contains at least one oxide selected from the group consisting of calcium oxide, silicon oxide, aluminum oxide and magnesium oxide. 
     
     
         15 . The method according to  claim 13 , wherein the titanium carrier contains at least one oxide.