Aluminothermic reduction mixtures

Abstract

An aluminothermic reduction mixture includes aluminum powder and iron oxide formed of ferric oxide (Fe 2 O 3 ) particles with a special shape and other constituent parts.

What is claimed is:  
     
         1 . Aluminothermic reduction mixture comprising aluminum powder and iron oxide with the iron oxide comprised of substantially all ferric oxide (Fe 2 O 3 ) formed of prism-like particles in a size range of minus 20 mesh to plus 200 mesh.  
     
     
         2 . Aluminothermic reduction mixture, as set forth in  claim 1 , wherein said mixture includes at least one additional constituent.  
     
     
         3 . Aluminothermic reduction mixture, as set forth in  claim 1 , wherein said prism-like particles are generally elongated in one direction, with generally planar sides extending in the elongated direction with said sides meeting along edges extending in the elongated direction and with ends extending transversally of the elongated direction and contacting said sides.  
     
     
         4 . Aluminothermic reduction mixture, as set forth in  claim 2 , wherein said mixture comprises at least three constituents.  
     
     
         5 . Aluminothermic reduction mixture, as set forth in  claim 2 , wherein based on 100% of said mixture said aluminum powder is in the range of 16% to 19%, and the ferric oxide (Fe 2 O 3 ) is in the range 53% to 58%.  
     
     
         6 . Aluminothermic reduction mixture, as set forth in  claim 4 , wherein said constituents includes steel particles, FeMn C alloy, sand and a FeV alloy.  
     
     
         7 . Aluminothermic reduction mixture, as set forth in  claim 6 , wherein based on 100% of said mixture, said aluminum powder is in the range of 16% to 19%, said ferric oxide (Fe 2 O 3 ) is in the range of 53% to 58%, said steel particles are in the range of 5% to 12%, said FeMn C is in the range of 15% to 19%, sand is in the range of 0.2% to 0.4% and FeV alloy is in the range of 0.3% to 0.6%.  
     
     
         8 . Aluminothermic reduction mixture, as set forth in  claim 6 , wherein said steel particles are one of steel nail beards and steel punchings.