US2009013827A1PendingUtilityA1

Conditioned Quicklime for Injection to a Molten Bath of a Steel-Making Vessel

Individually held — no corporate assignee on recordPriority: Feb 9, 2006Filed: Feb 9, 2006Published: Jan 15, 2009

Est. expiryFeb 9, 2026(expired)· nominal 20-yr term from priority

Inventors:Larry Wolfe Richard J. Brelowski

C21C 7/076C21C 1/025C21C 7/0037Y02P10/20C21C 7/0645C21C 7/068

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References

Claims

Abstract

In a method of producing steel using a steel-making vessel, where lime is used as a flux material that is blown, from above, into a steel-making bath along with an oxygen stream, providing a flux material composition of calcium oxide having a particle size of less than 250 mesh, which contains a flow aid material that is a polymeric siloxane, in an amount of less than 0.5 percent by weight of the calcium oxide, and injecting the flux material composition through a lance along with oxygen into the steel-making bath contained in the steel-making vessel.

Claims

exact text as granted — not AI-modified

1 . In a method of producing steel using a steel-making vessel, where lime is used as a flux material that is blown, from above, into a steel-making bath along with an oxygen stream, the improvement comprising:
 providing a flux material composition of calcium oxide having a particle size of less than 250 mesh, which contains a flow aid material that is an organic siloxane, in an amount of less than 0.5 percent by weight of the calcium oxide, and injecting the flux material composition through a lance along with oxygen into the steel-making bath contained in the vessel.   
     
     
         2 . The method according to  claim 1  wherein the lime is a high calcium lime. 
     
     
         3 . The method according to  claim 1  wherein the lime is a dolomitic lime. 
     
     
         4 . The method according to  claim 1  wherein the flow aid material is polydimethylsiloxane. 
     
     
         5 . The method according to  claim 1  wherein the flow aid material is polymethylhydrosiloxane.

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