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Use of bimodal carbon distribution in compacts for producing metallic iron nodules

United States Patent

8,287,621
October 16, 2012
View the Complete Patent at the US Patent & Trademark Office
A method for use in production of metallic iron nodules comprising providing a reducible mixture into a hearth furnace for the production of metallic iron nodules, where the reducible mixture comprises a quantity of reducible iron bearing material, a quantity of first carbonaceous reducing material of a size less than about 28 mesh of an amount between about 65 percent and about 95 percent of a stoichiometric amount necessary for complete iron reduction of the reducible iron bearing material, and a quantity of second carbonaceous reducing material with an average particle size greater than average particle size of the first carbonaceous reducing material and a size between about 3 mesh and about 48 mesh of an amount between about 20 percent and about 60 percent of a stoichiometric amount of necessary for complete iron reduction of the reducible iron bearing material.
Iwasaki; Iwao (Grand Rapids, MI)
Nu-Iron Technology, LLC (Charlotte, NC)
12/ 977,035
December 22, 2010
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH The present invention was made with support by the Department of Energy, Sponsor Award DE-FG36-05GO15185. The United States government may have certain rights in the invention.