Abrasive material for shot blasting, and method for producing same

Abstract

The abrasive material contains Fe, Si, Ca, Al, Mg and Mn and has an amorphous continuous phase, wherein the total amount of Fe, Si and Ca is 50.0% or more by mass in terms of the total content of FeO, SiO 2 and CaO, Fe is contained in an amount of 6.0% to 35.0% by mass inclusive in terms of FeO content, Si is contained in an amount of 15.0% to 35.0% by mass inclusive in terms of SiO 2 , and Ca is contained in an amount of 10.0% to 35.0% by mass inclusive in terms of CaO content, wherein all of the amounts are those relative to the entire amount of the abrasive material.

1 . A shot blasting abrasive material characterized by comprising Fe, Si, Ca, Al, Mg, and Mn, having an amorphous continuous phase, having a total amount of Fe content, Si content, and Ca content in terms of respectively FeO content, SiO 2  content, and CaO content of 50.0% or more by mass based on 100% by mass of a total of the shot blasting abrasive material, and having the Fe content in terms of the FeO content of 6.0% to 35.0% by mass, the Si content in terms of the SiO 2  content of 15.0% to 35.0% by mass, and the Ca content in terms of the CaO content of 10.0% to 35.0% by mass. 
     
     
         2 . The shot blasting abrasive material according to  claim 1 , having Al content in terms of Al 2 O 3  content of 3.0% to 25.0% by mass based on 100% by mass of a total of the shot blasting abrasive material. 
     
     
         3 . The shot blasting abrasive material according to  claim 1 , having Mn content in terms of MnO content of 2.0% to 20.0% by mass based on 100% by mass of a total of the shot blasting abrasive material. 
     
     
         4 . The shot blasting abrasive material according to  claim 1 , further comprising Ti, the shot blasting abrasive material having Ti content in terms of TiO 2  content of 0.01% to 10.0% by mass based on 100% by mass of a total of the shot blasting abrasive material. 
     
     
         5 . The shot blasting abrasive material according to  claim 1 , further comprising Cr, the shot blasting abrasive material having Cr content in terms of Cr 2 O 3  content of 0.5% to 5.0% by mass based on 100% by mass of a total of the shot blasting abrasive material. 
     
     
         6 . The shot blasting abrasive material according to  claim 1 ,
 wherein the shot blasting abrasive material is a slag particle obtained by air-granulating a molten slag.   
     
     
         7 . The shot blasting abrasive material according to  claim 6 ,
 wherein the molten slag is an electric arc furnace slag.   
     
     
         8 . The shot blasting abrasive material according to  claim 6 ,
 wherein the molten slag includes a waste glass and/or silica sand as a composition adjustment material.   
     
     
         9 . The shot blasting abrasive material according to  claim 8 ,
 wherein the waste glass is an automotive glass.   
     
     
         10 . A method for producing the shot blasting abrasive material according to  claim 6 , comprising:
 an air granulation step that air-granulates a molten slag or an electric arc furnace slag to form a slag particle;   a cooling step that cools the slag particle by spraying water to the slag particle while dropping the slag particle downward, or after dropping the slag particle; and   a dehydration/transfer step that dehydrates the slag particle while transferring the slag particle.   
     
     
         11 . A method for producing the shot blasting abrasive material according to  claim 8 , comprising:
 a composition adjustment step that adds a waste glass and/or silica sand to a molten slag or an electric arc furnace slag as a composition adjustment material;   an air granulation step that air-granulates the molten slag or the electric arc furnace slag obtained through the composition adjustment step to form a slag particle;   a cooling step that cools the slag particle by spraying water to the slag particle while dropping the slag particle downward, or after dropping the slag particle; and   a dehydration/transfer step that dehydrates the slag particle while transferring the slag particle.