Anti-bonding agents and methods for blast furnace slag or its grading adjusted slag

Abstract

An anti-bonding agent for blast furnace slag or its grading adjusted slag includes one or more polymers having a main constituent unit shown by by a greater molar percentage than any other constituent unit where M is hydrogen atom, alkali metal such as sodium, alkali earth metal, ammonium or organic amine. Such an agent is used in an amount of 0.002-0.3 weight parts for 100 weight parts of such blast furnace slag or its grading adjusted slag, and may be applied as an aqueous solution with concentration of 1.5-10 weight %.

What is claimed is:  
     
         1 . An anti-bonding agent for blast furnace slag or its grading adjusted slag, said anti-bonding agent comprising one or more polymers having a main constituent unit shown by Formula 1 given below by a greater molar percentage than any other constituent unit:  
       
         
           
           
               
               
           
         
       
       where M is hydrogen atom, alkali metal, alkali earth metal, ammonium or organic amine.  
     
     
         2 . The anti-bonding agent of  claim 1 , said one or more polymers having said main constituent unit shown by Formula 1 by 60 molar % or greater.  
     
     
         3 . The anti-bonding agent of  claim 2 , said one or more polymers also having other constituent units different from said main constituent unit shown by Formula 1.  
     
     
         4 . The anti-bonding agent of  claim 3 , said one or more polymers having said other constituent units by 5-30 molar %.  
     
     
         5 . The anti-bonding agent of  claim 4  wherein said other constituent units are formed from one or more monomers selected from the group consisting of methacrylic acid, salts of methacrylic acid, alkyl acrylates, alkyl methacrylates, hydroxyalkyl acrylates, hydroxyalkyl methacrylates, acrylamides, allylsulfonic acid, salts of allylsulfonic acid, methallylsulfonic acid, salts of methallylsulfonic acid, styrenesulfonic acid and salts of styrenesulfonic acid.  
     
     
         6 . The anti-bonding agent of  claim 2  wherein M is sodium.  
     
     
         7 . The anti-bonding agent of  claim 5  wherein M is sodium.  
     
     
         8 . The anti-bonding agent of  claim 2  wherein the number-average molecular weight of said one or more polymers is 3000-100000.  
     
     
         9 . The anti-bonding agent of  claim 5  wherein the number-average molecular weight of said one or more polymers is 3000-100000.  
     
     
         10 . The anti-bonding agent of  claim 7  wherein the number-average molecular weight of said one or more polymers is 3000-100000.  
     
     
         11 . An anti-bonding method for blast furnace slag or its grading adjusted slag, said anti-bonding method comprising the step of using 0.002-0.3 weight parts of an anti-bonding agent for 100 weight parts of said blast furnace slag or grading adjusted slag thereof, said anti-bonding agent comprising one or more polymers having a main constituent unit shown by Formula 1 given below by a greater molar percentage than any other constituent unit:  
       
         
           
           
               
               
           
         
       
       where M is hydrogen atom, alkali metal, alkali earth metal, ammonium or organic amine.  
     
     
         12 . The anti-bonding method of  claim 11  wherein said anti-bonding agent is used in an amount of 0.005-0.1 weight parts for 100 weight parts of said blast furnace slag or grading adjusted slag thereof.  
     
     
         13 . The anti-bonding method of  claim 12  wherein said anti-bonding agent is used as a 1.5-10 weight % aqueous solution.  
     
     
         14 . The anti-bonding method of  claim 13 , said one or more polymers having said main constituent unit shown by Formula 1 by 60 molar % or greater.  
     
     
         15 . The anti-bonding method of  claim 14 , said one or more polymers also having other constituent units different from said main constituent unit shown by Formula 1.  
     
     
         16 . The anti-bonding method of  claim 15 , said one or more polymers having said other constituent units by 5-30 molar %.  
     
     
         17 . The anti-bonding method of  claim 16  wherein said other constituent units are formed from one or more monomers selected from the group consisting of methacrylic acid, salts of methacrylic acid, alkyl acrylates, alkyl methacrylates, hydroxyalkyl acrylates, hydroxyalkyl methacrylates, acrylamides, allylsulfonic acid, salts of allylsulfonic acid, methallylsulfonic acid, salts of methallylsulfonic acid, styrenesulfonic acid and salts of styrenesulfonic acid.  
     
     
         18 . The anti-bonding method of  claim 14  wherein M is sodium.  
     
     
         19 . The anti-bonding method of  claim 17  wherein M is sodium.  
     
     
         20 . The anti-bonding method of  claim 14  wherein the number-average molecular weight of said one or more polymers is 3000-100000.  
     
     
         21 . The anti-bonding method of  claim 17  wherein the number-average molecular weight of said one or more polymers is 3000-100000.  
     
     
         22 . The anti-bonding method of  claim 19  wherein the number-average molecular weight of said one or more polymers is 3000-100000.