Brittle molded article and briquette using the same

Abstract

A brittle molded body (Z) obtained by compression molding into a prescribed shape a flocculent agglomerate (C) comprising ferrous metal shavings and a grinding liquid containing oil and water, the brittle molded body (Z) having a bulk specific gravity of at least 1.5. On the surface side of the brittle molded body (Z) is formed a strengthened layer (K) of higher density and higher hardness than on the inner side. A strengthened briquette (B) is obtained by impregnating a solidification aid D into this brittle molded body (Z).

1 . A brittle molded body, obtained by compression molding into a prescribed shape a flocculent agglomerate comprising ferrous metal shavings and a grinding liquid containing oil and water, the brittle molded body characterized in that: 
 the bulk specific gravity is at least 1.5; and    on the surface side is formed a strengthened layer of higher density and higher hardness than on the inner side.    
     
     
         2 . The brittle molded body according to  claim 1 , wherein the flocculent agglomerate is obtained by missing a flocculent agglomerate containing quenched ferrous metal shavings with a flocculent agglomerate containing unquenched ferrous metal shavings.  
     
     
         3 . The brittle molded body according to  claim 2 , wherein 30 to 50 wt % of the flocculent agglomerate containing unquenched ferrous metal shavings is mixed in.  
     
     
         4 . The brittle molded body according to  claim 1 , having an oil content of 1 to 12 wt %.  
     
     
         5 . The brittle molded body according to  claim 1 , wherein the ferrous metal contains at least 0.2 wt % of carbon.  
     
     
         6 . A dried briquette comprising powdered pure iron and oil, the briquette characterized by being obtained by strengthening the brittle molded body according to  claim 1  with a solidification aid impregnated thereinside.  
     
     
         7 . The briquette according to  claim 6 , wherein the solidification aid is at least one selected from colloidal silica, sodium silicate, aluminum phosphate, and emulsified asphalt.  
     
     
         8 . The briquette according to  claim 6 , containing 2 to 30 wt % of the solidification aid.