Mold powder for continuous casting of steel

Abstract

A powdered molding powder for continuous casting of steel according to the present invention is characterized in that the powder contains less than 0.5 percent by mass (including zero) of carbon black, from 0.5 to 20 percent by mass of carbon powders other than carbon black and from 0.1 to 7.0 percent by mass of carbohydrate powder as a carbonaceous raw material.

1 . A powdered molding powder for continuous casting of steel wherein the powdered molding powder contains not more than 0.5 percent by mass (weight) (including zero) of carbon black, from 0.5 to 20 percent by mass (weight) of carbon powders other than carbon black and from 0.1 to 7.0 percent by mass (weight) of carbohydrate powder as a carbonaceous raw material.  
   
   
       2 . The powdered molding powder for continuous casting of steel according to  claim 1 , wherein said powder contains from 0.1 to 8.0 percent of mass of acid-treated graphite as a part or all of the carbon powders other than carbon black.  
   
   
       3 . The powdered molding powder for continuous casting of steel according to  claim 1 , wherein said powder contains from 0.3 to 7.0 percent by mass of pigment.  
   
   
       4 . The powdered molding powder for continuous casting of steel according to  claim 2 , wherein said powder contains from 0.3 to 7.0 percent by mass of pigment.