Patents by Inventor Bradford G. True
Bradford G. True has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 8535602Abstract: A hearth furnace for producing metallic iron material has a furnace housing having a drying/preheat zone, a conversion zone, a fusion zone, and optionally a cooling zone, the conversion zone is between the drying/preheat zone and the fusion zone. A moving hearth is positioned within the furnace housing. A hood or separation barrier within at least a portion of the conversion zone, fusion zone or both separates the fusion zone into an upper region and a lower region with the lower region adjacent the hearth and the upper region adjacent the lower region and spaced from the hearth. An injector introduces a gaseous reductant into the lower region adjacent the hearth. A combustion region may be formed above the hood or separation barrier.Type: GrantFiled: January 17, 2012Date of Patent: September 17, 2013Assignee: Nu-Iron Technology, LLCInventors: Rodney L. Bleifuss, David J. Englund, Iwao Iwasaki, Donald R. Fosnacht, Mark M. Brandon, Bradford G. True
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Publication number: 20120119424Abstract: A hearth furnace for producing metallic iron material has a furnace housing having a drying/preheat zone, a conversion zone, a fusion zone, and optionally a cooling zone, the conversion zone is between the drying/preheat zone and the fusion zone. A moving hearth is positioned within the furnace housing. A hood or separation barrier within at least a portion of the conversion zone, fusion zone or both separates the fusion zone into an upper region and a lower region with the lower region adjacent the hearth and the upper region adjacent the lower region and spaced from the hearth. An injector introduces a gaseous reductant into the lower region adjacent the hearth. A combustion region may be formed above the hood or separation barrier.Type: ApplicationFiled: January 17, 2012Publication date: May 17, 2012Applicant: NU-IRON TECHNOLOGY, LLCInventors: Rodney L. Bleifuss, David J. Englund, Iwao Iwasaki, Donald R. Fosnacht, Mark M. Brandon, Bradford G. True
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Patent number: 8133299Abstract: A multiple moving hearth furnace (10) having a furnace housing (11) with at least two moving hearths (20) positioned laterally within the furnace housing, the hearths moving in opposite directions and each moving hearth (20) capable of being charged with at least one layer of iron oxide and carbon bearing material at one end, and being capable of discharging reduced material at the other end. A heat insulating partition (92) is positioned between adjacent moving hearths of at least portions of the conversion zones (13), and is capable of communicating gases between the atmospheres of the conversion zones of adjacent moving hearths. A drying/preheat zone (12), a conversion zone (13), and optionally a cooling zone (15) are sequentially positioned along each moving hearth (30) in the furnace housing (11).Type: GrantFiled: November 8, 2007Date of Patent: March 13, 2012Assignee: Nu-Iron Technology, LLCInventors: Mark M. Brandon, Bradford G. True
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Patent number: 8097065Abstract: A hearth furnace 10 for producing metallic iron material has a furnace housing 11 having a drying/preheat zone 12, a conversion zone 13, a fusion zone 14, and optionally a cooling zone 15, the conversion zone 13 is between the drying/preheat zone 12 and the fusion zone 14. A moving hearth 20 is positioned within the furnace housing 11. A hood or separation barrier 30 within at least a portion of the conversion zone 13, fusion zone 14 or both separates the fusion zone 14 into an upper region and a lower region with the lower region adjacent the hearth 20 and the upper region adjacent the lower region and spaced from the hearth 20. An injector introduces a gaseous reductant into the lower region adjacent the hearth 20. A combustion region may be formed above the hood or separation barrier.Type: GrantFiled: April 3, 2009Date of Patent: January 17, 2012Assignee: Nu-Iron Technology, LLCInventors: Rodney L. Bleifuss, David J. Englund, Iwao Iwasaki, Donald R. Fosnacht, Mark M. Brandon, Bradford G. True
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Publication number: 20100031778Abstract: A multiple moving hearth furnace (10) having a furnace housing (11) with at least two moving hearths (20) positioned laterally within the furnace housing, the hearths moving in opposite directions and each moving hearth (20) capable of being charged with at least one layer of iron oxide and carbon bearing material at one end, and being capable of discharging reduced material at the other end. A heat insulating partition (92) is positioned between adjacent moving hearths of at least portions of the conversion zones (13), and is capable of communicating gases between the atmospheres of the conversion zones of adjacent moving hearths. A drying/preheat zone (12), a conversion zone (13), and optionally a cooling zone (15) are sequentially positioned along each moving hearth (30) in the furnace housing (11).Type: ApplicationFiled: November 8, 2007Publication date: February 11, 2010Applicant: NU-IRON TECHNOLOGY, LLCInventors: Mark M. Brandon, Bradford G. True
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Publication number: 20090229414Abstract: A hearth furnace 10 for producing metallic iron material has a furnace housing 11 having a drying/preheat zone 12, a conversion zone 13, a fusion zone 14, and optionally a cooling zone 15, the conversion zone 13 is between the drying/preheat zone 12 and the fusion zone 14. A moving hearth 20 is positioned within the furnace housing 11. A hood or separation barrier 30 within at least a portion of the conversion zone 13, fusion zone 14 or both separates the fusion zone 14 into an upper region and a lower region with the lower region adjacent the hearth 20 and the upper region adjacent the lower region and spaced from the hearth 20. An injector introduces a gaseous reductant into the lower region adjacent the hearth 20. A combustion region may be formed above the hood or separation barrier.Type: ApplicationFiled: April 3, 2009Publication date: September 17, 2009Applicant: NU-IRON TECHNOLOGY, LLCInventors: Rodney L. BLEIFUSS, David J. ENGLUND, Iwao IWASAKI, Donald R. FOSNACHT, Mark M. BRANDON, Bradford G. True
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Patent number: 5946339Abstract: A method and apparatus for producing crude liquid steel using direct reduced iron as a raw material in an electric arc furnace with an acid resistant sidewall refractory lining. In order to effect the more economical melting operation, the electric arc furnace uses a slag containing a B4 ratio of (lime+magnesia)/(silica+alumina) in the range of about or less than 1.50, resulting in less slag volume, reduced electric power consumption, reduced electrode consumption, and improved iron yield.Type: GrantFiled: July 22, 1997Date of Patent: August 31, 1999Assignee: Itz a Gaz, Inc.Inventor: Bradford G. True
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Patent number: 4728358Abstract: A briquet consists essentially of metallized iron fines, formed by direct reduction of iron oxide, granulated or fine silica, a carbon source such as coke breeze, and less than 3.5 percent of other components, or impurities. The briquet product has a density of from 2.0 to 6.0 g/cc, and is particularly well suited for steelmaking operations.The method for making the briquet is also disclosed.Type: GrantFiled: April 30, 1986Date of Patent: March 1, 1988Assignee: Midrex International, B.V. Rotterdam, Zurich BranchInventors: Glenn E. Hoffman, Bradford G. True