Patents by Inventor Narayan Govindaswami
Narayan Govindaswami 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: 10704119Abstract: Examples herein generally relate to sinter blend compositions for use in a sintering process that do not contain coke breeze (0.0% coke breeze), or contain only very small amounts of coke breeze. In particular, these sinter blend compositions are capable of repurposing mixture of iron-making reverts, having high total and metallic iron levels that re-oxidize so as to become a replacement fuel source for the coke breeze typically used in sinter blend compositions for use in a sintering process, while still managing to produce a sinter with sufficient ISO tumble strengths.Type: GrantFiled: May 4, 2018Date of Patent: July 7, 2020Assignee: NU-IRON TECHNOLOGY, LLC.Inventors: Gary Levanduski, Narayan Govindaswami
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Publication number: 20180320245Abstract: Examples herein generally relate to sinter blend compositions for use in a sintering process that do not contain coke breeze (0.0% coke breeze), or contain only very small amounts of coke breeze. In particular, these sinter blend compositions are capable of repurposing mixture of iron-making reverts, having high total and metallic iron levels that re-oxidize so as to become a replacement fuel source for the coke breeze typically used in sinter blend compositions for use. in a sintering process, while still managing to produce a sinter with sufficient ISO tumble strengths.Type: ApplicationFiled: May 4, 2018Publication date: November 8, 2018Inventors: Gary Levanduski, Narayan Govindaswami
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Patent number: 8377371Abstract: A battery of stationary hearth furnaces, and method for using, for producing metallic iron nodules having a furnace having a stationary hearth, an inlet and an outlet; a heating chamber beneath the stationary hearth having heated fluids circulated thereto and heating reducible material on the stationary hearth; passageways circulating fluids, through ports from the furnace housing above the reducible material to the heating chamber beneath; burners and air inlets in the furnace and optionally in at least one passageway and a heating chamber for drying and heating the reducible material, driving off and burning volatile material, and forming metallic iron nodules; a loading device for loading reducible material and optionally hearth material onto the stationary hearth through the inlet; and a discharging device capable of discharging metallic iron nodules and optionally related material from the stationary hearth through the outlet.Type: GrantFiled: September 26, 2011Date of Patent: February 19, 2013Assignee: Nu-Iron Technology, LLCInventor: Narayan Govindaswami
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Publication number: 20120013054Abstract: A battery of stationary hearth furnaces, and method for using, for producing metallic iron nodules having a furnace having a stationary hearth, an inlet and an outlet; a heating chamber beneath the stationary hearth having heated fluids circulated thereto and heating reducible material on the stationary hearth; passageways circulating fluids, through ports from the furnace housing above the reducible material to the heating chamber beneath; burners and air inlets in the furnace and optionally in at least one passageway and a heating chamber for drying and heating the reducible material, driving off and burning volatile material, and forming metallic iron nodules; a loading device for loading reducible material and optionally hearth material onto the stationary hearth through the inlet; and a discharging device capable of discharging metallic iron nodules and optionally related material from the stationary hearth through the outlet.Type: ApplicationFiled: September 26, 2011Publication date: January 19, 2012Applicant: NU-IRON TECHNOLOGY, LLCInventor: Narayan GOVINDASWAMI
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Patent number: 8025711Abstract: A battery of stationary hearth furnaces, and method for using, for producing metallic iron nodules having a furnace having a stationary hearth, an inlet and an outlet; a heating chamber beneath the stationary hearth having heated fluids circulated thereto and heating reducible material on the stationary hearth; passageways circulating fluids, through ports from the furnace housing above the reducible material to the heating chamber beneath; burners and air inlets in the furnace and optionally in at least one passageway and a heating chamber for drying and heating the reducible material, driving off and burning volatile material, and forming metallic iron nodules; a loading device for loading reducible material and optionally hearth material onto the stationary hearth through the inlet; and a discharging device capable of discharging metallic iron nodules and optionally related material from the stationary hearth through the outlet.Type: GrantFiled: December 18, 2008Date of Patent: September 27, 2011Assignee: Nu-Iron Technology, LLCInventor: Narayan Govindaswami
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Publication number: 20090158892Abstract: A battery of stationary hearth furnaces, and method for using, for producing metallic iron nodules having a furnace having a stationary hearth, an inlet and an outlet; a heating chamber beneath the stationary hearth having heated fluids circulated thereto and heating reducible material on the stationary hearth; passageways circulating fluids, through ports from the furnace housing above the reducible material to the heating chamber beneath; burners and air inlets in the furnace and optionally in at least one passageway and a heating chamber for drying and heating the reducible material, driving off and burning volatile material, and forming metallic iron nodules; a loading device for loading reducible material and optionally hearth material onto the stationary hearth through the inlet; and a discharging device capable of discharging metallic iron nodules and optionally related material from the stationary hearth through the outlet.Type: ApplicationFiled: December 18, 2008Publication date: June 25, 2009Applicant: NU-IRON TECHNOLOGY, LLCInventor: Narayan GOVINDASWAMI
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Patent number: 6478841Abstract: Disclosed is a method for steel making which includes charging a direct reduction reactor (DRR) with iron ore from a charging system. The iron ore is reduced to hot direct reduced iron (DRI) in the DRR and discharged to rotary kiln(s). The rotary kiln(s) does not process the DRI, but transports the hot DRI to one or more electric arc furnaces (EAF). Top gas (i.e., spent reducing gas) is drawn off of a top section of the DRR. A portion of the top gas is used to pressurize the rotary kiln to prevent air from entering the rotary kiln. Another portion of the top gas flows to a pressure swing adsorber or a vacuum pressure swing adsorber (PSA/VPSA) for CO2 and H2O removal. A cool reducing gas exits the PSA/VPSA. A plasma torch burns natural gas and oxygen to form a hot reducing gas. The hot reducing gas is mixed with the cool reducing gas to form a final reducing gas. The final reducing gas is delivered to the DRR. Also disclosed is a mini-mill to perform the method of steel making.Type: GrantFiled: September 12, 2001Date of Patent: November 12, 2002Assignee: Techint Technologies Inc.Inventors: Dominic M. Faccone, Narayan Govindaswami