Reclaimed magnesium desulfurization agent

Abstract

A method and composition for removing sulfur from molten ferrous material, particularly molten iron. The desulfurization agent includes reclaimed magnesium scrap, a gas-producing compound and a calcium compound.

1 - 46 . (canceled)  
   
   
       47 . A desulfurization agent for removing sulfur from molten iron, said desulfurization agent including reclaimed magnesium, a gas-producing compound and a calcium compound, said reclaimed magnesium at least partially formed from ground particles of a briquette or puck of magnesium scrap, said briquette particles including about 1-15% liquid.  
   
   
       48 . The desulfurization agent as defined in  claim 47 , wherein said reclaimed magnesium includes pure magnesium, a solid magnesium compound, a magnesium alloy or mixtures thereof.  
   
   
       49 . The desulfurization agent as defined in  claim 47 , wherein said liquid includes, water, lubrication fluid, cutting fluid, or mixtures thereof.  
   
   
       50 . The desulfurization agent as defined in  claim 47 , wherein said liquid includes at least a portion of said gas-producing compound.  
   
   
       51 . The desulfurization agent as defined in  claim 50 , wherein said gas producing agent includes a hydrocarbon compound.  
   
   
       52 . The desulfurization agent as defined in  claim 47 , wherein said calcium compound includes calcium oxide, calcium carbide, calcium carbonate, calcium chloride, calcium cyanamide, calcium iodide, calcium nitrate, calcium nitrite or mixtures thereof.  
   
   
       53 . The desulfurization agent as defined in  claim 52 , wherein a majority of said calcium compound includes calcium oxide, calcium carbonate, calcium carbide or mixtures thereof.  
   
   
       54 . The desulfurization agent as defined in  claim 51 , wherein a majority of said calcium compound includes calcium oxide, calcium carbonate, calcium carbide or mixtures thereof.  
   
   
       55 . The desulfurization agent as defined in  claim 47 , wherein said gas-producing compound constitutes less than about 10 weight percent of said desulfurization agent.  
   
   
       56 . The desulfurization agent as defined in  claim 53 , wherein said gas-producing compound constitutes less than about 10 weight percent of said desulfurization agent.  
   
   
       57 . The desulfurization agent as defined in  claim 54 , wherein said gas-producing compound constitutes less than about 10 weight percent of said desulfurization agent.  
   
   
       58 . The desulfurization agent as defined in  claim 47 , wherein said reclaimed magnesium includes magnesium chips, magnesium turnings, or mixtures thereof.  
   
   
       59 . A method for forming a desulfurization agent used to remove sulfur from molten iron comprising: 
 a) obtaining a magnesium material, at least a portion of said magnesium material being reclaimed magnesium from a briquette or puck, said briquette or puck including 1-15% liquid;    b) at least partially grinding said reclaimed magnesium material; and,    c) mixing said ground magnesium material with a calcium compound.    
   
   
       60 . The method as defined in  claim 59 , wherein said step of mixing includes the step of co-grinding said reclaimed magnesium material with said calcium compound.  
   
   
       61 . The method as defined in  claim 59 , including the step of at least partially forming said magnesium briquette by a) at least partially removing fluid from reclaimed magnesium; 
 and b) compressing said reclaimed magnesium to form said magnesium briquette or puck, said magnesium briquette or puck having a density of at least about 80 lbs/ft 3  and a fluid content of less than about 10 weight percent.    
   
   
       62 . The method as defined in  claim 60 , including the step of at least partially forming said magnesium briquette by a) at least partially removing fluid from reclaimed magnesium; 
 and b) compressing said reclaimed magnesium to form said magnesium briquette or puck, said magnesium briquette or puck having a density of at least about 80 lbs/ft 3  and a fluid content of less than about 10 weight percent.    
   
   
       63 . The method as defined in  claim 61 , wherein said step of at least partially removing fluid from reclaimed magnesium includes centrifuging said reclaimed magnesium.  
   
   
       64 . The method as defined in  claim 62 , wherein said step of at least partially removing fluid from reclaimed magnesium includes centrifuging said reclaimed magnesium.  
   
   
       65 . The method as defined in  claim 59 , including the step of mixing a gas-producing compound with said magnesium material and calcium compound.  
   
   
       66 . The method as defined in  claim 60 , including the step of mixing a gas-producing compound with said magnesium material and calcium compound.  
   
   
       67 . The method as defined in  claim 61 , including the step of mixing a gas-producing compound with said magnesium material and calcium compound.  
   
   
       68 . The method as defined in  claim 63 , including the step of mixing a gas-producing compound with said magnesium material and calcium compound.  
   
   
       69 . The method as defined in  claim 64 , including the step of mixing a gas-producing compound with said magnesium material and calcium compound.  
   
   
       70 . The method as defined in  claim 60 , wherein said reclaimed magnesium is pre-ground prior to said co-grinding.  
   
   
       71 . The method as defined in  claim 59 , wherein said reclaimed magnesium used to at least partially form said magnesium briquette or puck includes magnesium chips, magnesium turnings, or mixtures thereof.  
   
   
       72 . The method as defined in  claim 59 , wherein said magnesium material includes pure magnesium, a solid magnesium compound, a magnesium alloy or mixtures thereof.  
   
   
       73 . The method as defined in  claim 59 , wherein said calcium compound includes calcium oxide, calcium carbide, calcium carbonate, calcium chloride, calcium cyanamide, calcium iodide, calcium nitrate, calcium nitrite or mixtures thereof.  
   
   
       74 . The method as defined in  claim 73 , wherein a majority of said calcium compound includes calcium oxide, calcium carbonate, calcium carbide or mixtures thereof.  
   
   
       75 . The method as defined in  claim 68 , wherein a majority of said calcium compound includes calcium oxide, calcium carbonate, calcium carbide or mixtures thereof.  
   
   
       76 . The method as defined in  claim 69 , wherein a majority of said calcium compound includes calcium oxide, calcium carbonate, calcium carbide or mixtures thereof.  
   
   
       77 . The method as defined in  claim 66 , wherein said gas-producing compound includes lubrication fluid, cutting fluid or mixtures thereof.  
   
   
       78 . The method as defined in  claim 75 , wherein said gas-producing compound includes lubrication fluid, cutting fluid or mixtures thereof.  
   
   
       79 . The method as defined in  claim 76 , wherein said gas-producing compound includes lubrication fluid, cutting fluid or mixtures thereof.  
   
   
       80 . The method as defined in  claim 60 , wherein said step of grinding includes the reduction of said magnesium material to an average particle size of about 18-100 U.S. Standard Mesh.  
   
   
       81 . The method as defined in  claim 79 , wherein said step of grinding includes the reduction of said magnesium material to an average particle size of about 18-100 U.S. Standard Mesh.  
   
   
       82 . The method as defined in  claim 59 , wherein said liquid in said briquette includes said gas-producing compound.