Patents by Inventor Kazuya Miyagawa
Kazuya Miyagawa 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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Publication number: 20240167109Abstract: A method for producing pig iron may use a blast furnace with a tuyere. Such a method may include: charging a first layer containing an iron ore material and a second layer containing coke alternately in the blast furnace; and reducing and melting the iron ore material in the charged first layer while injecting an auxiliary reductant into the blast furnace by hot air blown from the tuyere. An aggregate containing a reduced iron molded product obtained through compression molding of reduced iron may be blended into the first layer. The iron ore material may contain iron ore pellets as a principal material. An average basicity of the reduced iron molded product may be less than or equal to 0.5, and an average basicity of the iron ore pellets may be greater than or equal to 0.9.Type: ApplicationFiled: May 10, 2021Publication date: May 23, 2024Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Kazuya MIYAGAWA, Masahiro YAKEYA
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Patent number: 6605130Abstract: Pellets incorporated with a carbonaceous material of the present invention contain a carbonaceous material and iron ore mainly composed of iron oxide. The maximum fluidity of the carbonaceous material in softening and melting, and the ratio of iron oxide particles of 10 &mgr;m or smaller in the iron ore are within the range above a line which connects in turn points A, B and C shown in FIG. 1, including the line. This permits the production of pellets incorporated with a carbonaceous material having excellent thermal conductivity and high strength. Reduction of the pellets incorporated with a carbonaceous material produces reduced iron having high strength after reduction and a low fines ratio with improved productivity.Type: GrantFiled: November 15, 2001Date of Patent: August 12, 2003Assignee: Kobe Steel, Ltd.Inventors: Yoshimichi Takenaka, Shoji Shirouchi, Masakata Shimizu, Kazuya Miyagawa
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Publication number: 20030084972Abstract: A hot rolling line and a hot rolling method capable of finer refining crystal grains are provided. Specifically, the hot rolling line for a metal sheet is composed of a finish rolling mill, a leveler, and a cooling apparatus installed from upstream to downstream in this sequence in a metal sheet transporting direction. The hot rolling method is such that, in the above hot rolling line, a metal sheet obtained by finish rolling a metal piece is subjected to repeated bending processing by the leveler and then cooled.Type: ApplicationFiled: August 19, 2002Publication date: May 8, 2003Inventors: Yukihiro Matsubara, Toshiki Hiruta, Masanori Kitahama, Kazuya Miyagawa, Futoshi Goto, Kazuo Onda, Eiji Tohyama, Takeshi Hirabayashi
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Publication number: 20020046628Abstract: Pellets incorporated with a carbonaceous material of the present invention contain a carbonaceous material and iron ore mainly composed of iron oxide. The maximum fluidity of the carbonaceous material in softening and melting, and the ratio of iron oxide particles of 10 &mgr;m or smaller in the iron ore are within the range above a line which connects in turn points A, B and C shown in FIG. 1, including the line. This permits the production of pellets incorporated with a carbonaceous material having excellent thermal conductivity and high strength. Reduction of the pellets incorporated with a carbonaceous material produces reduced iron having high strength after reduction and a low fines ratio with improved productivity.Type: ApplicationFiled: November 15, 2001Publication date: April 25, 2002Applicant: Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.)Inventors: Yoshimichi Takenaka, Shoji Shirouchi, Masakata Shimizu, Kazuya Miyagawa
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Patent number: 6334883Abstract: Pellets incorporated with a carbonaceous material of the present invention contain a carbonaceous material and iron ore mainly composed of iron oxide. The maximum fluidity of the carbonaceous material in softening and melting, and the ratio of iron oxide particles of 10 &mgr;m or smaller in the iron ore are within the range above a line which connects in turn points A, B and C shown in FIG. 1, including the line. This permits the production of pellets incorporated with a carbonaceous material having excellent thermal conductivity and high strength. Reduction of the pellets incorporated with a carbonaceous material produces reduced iron having high strength after reduction and a low fines ratio with improved productivity.Type: GrantFiled: November 22, 1999Date of Patent: January 1, 2002Assignee: Kobe Steel, Ltd.Inventors: Yoshimichi Takenaka, Shoji Shirouchi, Masakata Shimizu, Kazuya Miyagawa
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Patent number: 6302938Abstract: A carbonaceous material is controlled such that the amount of carbon is from 7 to 60 mass % based on the total amount of iron and Zn in a starting mixture comprising one or more of ducts containing iron oxide and Zn oxide and a binder in an amount to bond the dusts, and water is added to prepare green pellets incorporated with the carbonaceous material. Then, dry pellets prepared by drying the thus prepared green pellets into a reduction furnace, the dry pellets are heated by heat transfer, mainly, radiation such that a temperature elevation rate is from 3 to 13° C./sec within a temperature range from 150 to 900° C. of the pellets, thereby reducing Zn oxide and evaporating Zn, as well as reducing iron oxide to produce reduced iron pellets.Type: GrantFiled: July 10, 2000Date of Patent: October 16, 2001Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Tsunao Kamijo, Kazuya Miyagawa, Yoshimichi Takenaka, Masakata Shimizu, Shoji Shirouchi, Haruhisa Iwakiri
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Patent number: 6152983Abstract: A carbonaceous material is controlled such that the amount of carbon is from 7 to 60 mass % based on the total amount of iron and Zn in a starting mixture comprising one or more of ducts containing iron oxide and Zn oxide and a binder in an amount to bond the dusts, and water is added to prepare green pellets incorporated with the carbonaceous material. Then, dry pellets prepared by drying the thus prepared green pellets into a reduction furnace, the dry pellets are heated by heat transfer, mainly, radiation such that a temperature elevation rate is from 3 to 13.degree. C./sec within a temperature range from 150 to 900.degree. C. of the pellets, thereby reducing Zn oxide and evaporating Zn, as well as reducing iron oxide to produce reduced iron pellets.Type: GrantFiled: December 17, 1998Date of Patent: November 28, 2000Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Tsunao Kamijo, Kazuya Miyagawa, Yoshimichi Takenaka, Masakata Shimizu, Shoji Shirouchi, Haruhisa Iwakiri
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Patent number: 6129777Abstract: Iron oxide agglomerates incorporated with the carbonaceous material having a particle size within a range of about 10 to 30 nm are prepared upon production of reduced iron agglomerates. Then, the iron oxides agglomerates incorporated with the carbonaceous material were laid thinly at a laying density of less than 1.4 kg/m.sup.2 /mm or lower on a hearth of a moving hearth furnace. Subsequently, the iron oxide agglomerates are heated rapidly such that the surface temperature of the iron oxide agglomerates reaches 1200.degree. C. or higher within one-third of the retention period of time of the iron oxide agglomerates in the moving hearth furnace. Then, the iron oxide agglomerates are reduced till the metallization ratio thereof reaches 85% or higher to form reduced iron agglomerates and then the reduced iron agglomerates are discharged out of the moving hearth furnace. With the procedures, reduced iron agglomerates of a high average quality can be obtained at a high productivity.Type: GrantFiled: March 24, 1999Date of Patent: October 10, 2000Assignee: Kabushiki Kaisha Kobe Seiko ShoInventors: Kojiro Fuji, Hidetoshi Tanaka, Takao Harada, Takeshi Sugiyama, Yoshimichi Takenaka, Kazuya Miyagawa, Shoji Shirouchi, Haruhisa Iwakiri, Makoto Nishimura, Takao Umeki, Sumito Hashimoto, Teruhisa Uehara
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Patent number: 5114224Abstract: A light for an infrared ray) emitting member or a reflective (or an infrared ray reflective) medium is mounted at a predetermined position on an object upon which an image is projected. The light emitting member or the reflective medium is acquired in the coaxial direction of an image projecting unit by an (infrared ray) image pick-up means and video signals obtained by the (infrared ray) image pick-up means are digitized in an image processing unit, such that a highly luminous point of the light emitting or reflected portion occurs in a binary image. A central value of a primary moment on the binary image including the high luminous point, is calculated in real time, and the calculated data is fed back to an electrically-driven driving portion of the image projecting unit, so that the image may be continually projected at the predetermined position. The electrically-drive turntable automatically controls the image projecting direction including the direction of light.Type: GrantFiled: July 24, 1990Date of Patent: May 19, 1992Assignees: Densu Prox., Inc., Aoi Studio Co., Ltd.Inventors: Takashi Miyamoto, Kazuya Miyagawa, Yukihito Tomimatsu, Tsutomu Sugiura, Kenji Nishi, Taku Ichihara