Patents by Inventor Yasuhiko Igawa
Yasuhiko Igawa 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: 7438730Abstract: A method for producing an iron oxide pellet including the steps of adding water to a raw material mixture comprising iron oxide which serves as a primary component, a carbonaceous material in an amount sufficient for reducing the iron oxide, an organic binder in an amount sufficient for binding the iron oxide and the carbonaceous material, and an inorganic coagulant in an amount of not less than 0.05 mass % and less than 1 mass %; pelletizing the resultant mixture to thereby obtain a green pellet; and drying the green pellet until the moisture content is reduced to equal to or less than 1.0 mass %. The thus-produced iron oxide pellet is charged in a reducing furnace for reduction to thereby obtain a reduced iron pellet.Type: GrantFiled: March 20, 2006Date of Patent: October 21, 2008Assignee: Kobe Steel, Ltd.Inventors: Yasuhiko Igawa, Jun Jimbo, Hidetoshi Tanaka, Shoichi Kikuchi, Takao Harada, Osamu Tsuchiya, Shuzo Ito, Isao Kobayashi
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Publication number: 20060218753Abstract: A method for producing an iron oxide pellet including the steps of adding water to a raw material mixture comprising iron oxide which serves as a primary component, a carbonaceous material in an amount sufficient for reducing the iron oxide, an organic binder in an amount sufficient for binding the iron oxide and the carbonaceous material, and an inorganic coagulant in an amount of not less than 0.05 mass % and less than 1 mass %; pelletizing the resultant mixture to thereby obtain a green pellet; and drying the green pellet until the moisture content is reduced to equal to or less than 1.0 mass %. The thus-produced iron oxide pellet is charged in a reducing furnace for reduction to thereby obtain a reduced iron pellet.Type: ApplicationFiled: March 20, 2006Publication date: October 5, 2006Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yasuhiko Igawa, Jun Jimbo, Hidetoshi Tanaka, Shoichi Kikuchi, Takao Harada, Osamu Tsuchiya, Shuzo Ito, Isao Kobayashi
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Publication number: 20040221426Abstract: A method for producing an iron oxide pellet including the steps of adding water to a raw material mixture comprising iron oxide which serves as a primary component, a carbonaceous material in an amount sufficient for reducing the iron oxide, an organic binder in an amount sufficient for binding the iron oxide and the carbonaceous material, and an inorganic coagulant in an amount of not less than 0.05 mass % and less than 1 mass %; pelletizing the resultant mixture to thereby obtain a green pellet; and drying the green pellet until the moisture content is reduced to equal to or less than 1.0 mass %. The thus-produced iron oxide pellet is charged in a reducing furnace for reduction to thereby obtain a reduced iron pellet.Type: ApplicationFiled: February 17, 2004Publication date: November 11, 2004Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yasuhiko Igawa, Jun Jimbo, Hidetoshi Tanaka, Shoichi Kikuchi, Takao Harada, Osamu Tsuchiya, Shuzo Ito, Isao Kobayashi
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Patent number: 6811759Abstract: A method for producing an iron oxide pellet including the steps of adding water to a raw material mixture comprising iron oxide which serves as a primary component, a carbonaceous material in an amount sufficient for reducing the iron oxide, an organic binder in an amount sufficient for binding the iron oxide and the carbonaceous material, and an inorganic coagulant in an amount of not less than 0.05 mass % and less than 1 mass %; pelletizing the resultant mixture to thereby obtain a green pellet; and drying the green pellet until the moisture content is reduced to equal to or less than 1.0 mass %. The thus-produced iron oxide pellet is charged in a reducing furnace for reduction to thereby obtain a reduced iron pellet.Type: GrantFiled: May 27, 2003Date of Patent: November 2, 2004Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Osamu Tsuchiya, Hidetoshi Tanaka, Takao Harada, Jun Jimbo, Shoichi Kikuchi, Yasuhiko Igawa
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Publication number: 20030198779Abstract: A method for producing an iron oxide pellet including the steps of adding water to a raw material mixture comprising iron oxide which serves as a primary component, a carbonaceous material in an amount sufficient for reducing the iron oxide, an organic binder in an amount sufficient for binding the iron oxide and the carbonaceous material, and an inorganic coagulant in an amount of not less than 0.05 mass % and less than 1 mass %; pellelizing the resultant mixture to thereby obtain a green pellet; and drying the green pellet until the moisture content is reduced to equal to or less than 1.0 mass %. The thus-produced iron oxide pellet is charged in a reducing furnace for reduction to thereby obtain a reduced iron pellet.Type: ApplicationFiled: May 27, 2003Publication date: October 23, 2003Applicant: KABUSHIKI KAISHA KOBE SEIKO SHOInventors: Osamu Tsuchiya, Hidetoshi Tanaka, Takao Harada, Jun Jimbo, Shoichi Kikuchi, Yasuhiko Igawa
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Patent number: 6579505Abstract: A method for producing an iron oxide pellet including the steps of adding water to a raw material mixture comprising iron oxide which serves as a primary component, a carbonaceous material in an amount sufficient for reducing the iron oxide, an organic binder in an amount sufficient for binding the iron oxide and the carbonaceous material, and an inorganic coagulant in an amount of not less than 0.05 mass % and less than 1 mass %; pelletizing the resultant mixture to thereby obtain a green pellet; and drying the green pellet until the moisture content is reduced to equal to or less than 1.0 mass %. The thus-produced iron oxide pellet is charged in a reducing furnace for reduction to thereby obtain a reduced iron pellet.Type: GrantFiled: July 11, 2002Date of Patent: June 17, 2003Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Osamu Tsuchiya, Hidetoshi Tanaka, Takao Harada, Jun Jimbo, Shoichi Kikuchi, Yasuhiko Igawa
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Publication number: 20020175441Abstract: A method for producing an iron oxide pellet including the steps of adding water to a raw material mixture comprising iron oxide which serves as a primary component, a carbonaceous material in an amount sufficient for reducing the iron oxide, an organic binder in an amount sufficient for binding the iron oxide and the carbonaceous material, and an inorganic coagulant in an amount of not less than 0.05 mass % and less than 1 mass %; pelletizing the resultant mixture to thereby obtain a green pellet; and drying the green pellet until the moisture content is reduced to equal to or less than 1.0 mass %. The thus-produced iron oxide pellet is charged in a reducing furnace for reduction to thereby obtain a reduced iron pellet.Type: ApplicationFiled: July 11, 2002Publication date: November 28, 2002Applicant: KABUSHIKI KAISHA KOBE SEIKO SHOInventors: Osamu Tsuchiya, Hidetoshi Tanaka, Takao Harada, Jun Jimbo, Shoichi Kikuchi, Yasuhiko Igawa