Patents by Inventor Hideaki Mizuki
Hideaki Mizuki 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: 10155997Abstract: Provided is a device for producing partially reduced iron, with which partially reduced iron having a prescribed reduction ratio can be produced efficiently. The present invention is equipped with: CO sensors that detect the carbon monoxide concentration in an exhaust gas; an O2 sensor that detects the oxygen concentration in an exhaust gas; an exhaust gas circulation device that adjusts the circulating amount of the exhaust gas supplied to a reduction furnace main body, and an air feed device that adjusts the amount of air that being fed; and a control device that controls these devices. The control devices on the basis of the carbon monoxide concentration in the exhaust gas as detected by the CO sensor and the oxygen concentration in the exhaust gas as detected by the O2 sensor.Type: GrantFiled: December 11, 2014Date of Patent: December 18, 2018Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.Inventors: Susumu Kamikawa, Hideaki Mizuki, Keiichi Sato, Hideki Itou, Khanhson Pham
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Publication number: 20160304977Abstract: Provided is a device for producing partially reduced iron, with which partially reduced iron having a prescribed reduction ratio can be produced efficiently. The present invention is equipped with: CO sensors that detect the carbon monoxide concentration in an exhaust gas; an O2 sensor that detects the oxygen concentration in an exhaust gas; an exhaust gas circulation device that adjusts the circulating amount of the exhaust gas supplied to a reduction furnace main body, and an air feed device that adjusts the amount of air that being fed; and a control device that controls these devices. The control devices on the basis of the carbon monoxide concentration in the exhaust gas as detected by the CO sensor and the oxygen concentration in the exhaust gas as detected by the O2 sensor.Type: ApplicationFiled: December 11, 2014Publication date: October 20, 2016Applicant: PRIMETALS TECHNOLOGIES JAPAN, LTD.Inventors: Susumu KAMIKAWA, Hideaki MIZUKI, Keiichi SATO, Hideki ITOU, Khanhson PHAM
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Patent number: 9163879Abstract: A partially-reduced iron producing apparatus includes: an exhaust gas circulating device which supplies an oxygen-containing gas to raw-material pellets to be heated by a heat of ignition raw-material pellets, the oxygen-containing gas made by circulating part of an exhaust gas discharged from the raw-material pellets by use of the heat of the ignition raw-material pellets heated in a heating furnace and mixing the discharged exhaust gas with air; and a liquid-tar separating device which is provided in the exhaust gas circulating device and which separates a tar component in the exhaust gas from the exhaust gas as a liquid tar.Type: GrantFiled: September 20, 2013Date of Patent: October 20, 2015Assignee: PRIMETALS TECHNOLOGIES JAPAN, LTD.Inventors: Susumu Kamikawa, Hideaki Mizuki, Hideki Ito, Keiichi Sato, Khanhson Pham
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Publication number: 20140084524Abstract: A partially-reduced iron producing apparatus includes: an exhaust gas circulating device supplying an oxygen-containing gas to raw-material pellets to be heated by ignition of raw-material pellets, the oxygen-containing gas made by circulating part of an exhaust gas by use of the heat of the ignition raw-material pellets and mixing the discharged exhaust gas with air; and a liquid-tar separating device which is provided in the exhaust gas circulating device. A partially-reduced iron is produced by heating and reducing the whole of the raw-material pellets in a bed height direction thereof through a combustion region for the raw-material pellets and a heating region for the raw-material pellets, the combustion region formed on an upstream side of an endless grate by supplying the gas having a high oxygen concentration; and the heating region formed downstream of the combustion region of the endless grate by supplying the gas having a low oxygen concentration.Type: ApplicationFiled: September 20, 2013Publication date: March 27, 2014Applicant: MITSUBISHI HITACHI METALS MACHINERY, INC.Inventors: Susumu KAMIKAWA, Hideaki MIZUKI, Hideki ITO, Keiichi SATO, Khanhson PHAM
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Patent number: 6840981Abstract: A method of producing reduced iron pellets including reducing raw material pellets to obtain reduced iron pellets, and rolling the reduced iron pellets at a temperature ranging between 800 and 1200° C. sufficiently such that the reduced iron pellets undergo sintering.Type: GrantFiled: May 4, 2001Date of Patent: January 11, 2005Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Hironori Fujioka, Hideaki Mizuki, Koichi Hirata, Shigeo Itano, Susumu Kamikawa, Hisao Teramoto, Takashi Yamane, Shigeki Sueda, Tetsumasa Kawamoto
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Patent number: 6551548Abstract: An apparatus for producing reduced iron, and a compact drying method for application to the apparatus are disclosed. The apparatus comprises a pelletizer or a briquetter for mixing and agglomerating coal as a reducing agent and iron ore as iron oxide to form compacts, a dryer for drying the compacts, a circular rotary hearth type reducing furnace for reducing the dried compacts in a high temperature atmosphere, a first heat exchanger for performing heat exchange between a hot off-gas discharged from the reducing furnace and combustion air to be supplied to the reducing furnace, and coolers for cooling the hot off-gas. A second heat exchanger for heating drying air is disposed on an exit side of the first heat exchanger. The drying air heated by the second heat exchanger is supplied to the dryer to dry the compacts with the drying air which is scant in moisture. Consequently, highly efficient, stable drying in the dryer can be performed, and high quality reduced iron can be produced stably.Type: GrantFiled: September 17, 2001Date of Patent: April 22, 2003Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Susumu Kamikawa, Kouichi Hirata, Hironori Fujioka, Hideaki Mizuki, Keiichi Sato
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Patent number: 6451085Abstract: In the production of reduced iron by agglomerating a mixed powder of an iron material and a reducing agent to form compacts like briquettes or pellets, and reducing the compacts in a high temperature atmosphere, when the temperature of reduced compacts is 900° C. or higher, the oxide content in the reduced compacts is set at 11% or more, and the basicity of the reduced compacts is set at 0.5 or higher.Type: GrantFiled: July 7, 2000Date of Patent: September 17, 2002Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Susumu Kamikawa, Kouichi Hirata, Hironori Fujioka, Hideaki Mizuki, Keiichi Sato
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Patent number: 6413471Abstract: An apparatus for producing reduced iron by agglomerating a mixed powder of an iron material and a reducing agent to form compacts like briquettes or pellets, and reducing the compacts in a high temperature atmosphere is disclosed. In the apparatus, a rotary hearth in an annular form is rotatably supported. Right and left furnace walls and a ceiling are provided to cover an area above the rotary hearth, thereby forming a space portion in a high temperature atmosphere. A compact supply portion, and a compact discharge portion are provided adjacently in the ceiling. Partitioning members are provided as partitions between the compact supply portion, the compact discharge portion, and the high temperature atmosphere space portion.Type: GrantFiled: July 7, 2000Date of Patent: July 2, 2002Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Susumu Kamikawa, Kouichi Hirata, Hironori Fujioka, Hideaki Mizuki, Keiichi Sato, Akihiro Santo
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Patent number: 6372016Abstract: An apparatus for producing reduced iron, and a compact drying method for application to the apparatus are disclosed. The apparatus comprises a pelletizer or a briquetter for mixing and agglomerating coal as a reducing agent and iron ore as iron oxide to form compacts, a dryer for drying the compacts, a circular rotary hearth type reducing furnace for reducing the dried compacts in a high temperature atmosphere, a first heat exchanger for performing heat exchange between a hot off-gas discharged from the reducing furnace and combustion air to be supplied to the reducing furnace, and coolers for cooling the hot off-gas. A second heat exchanger for heating drying air is disposed on an exit side of the first heat exchanger. The drying air heated by the second heat exchanger is supplied to the dryer to dry the compacts with the drying air scant in moisture. Consequently, highly efficient, stable drying in the dryer can be performed, and high quality reduced iron can be produced stably.Type: GrantFiled: July 5, 2000Date of Patent: April 16, 2002Assignee: Mitsubishi Heavy Industries, LTDInventors: Susumu Kamikawa, Kouichi Hirata, Hironori Fujioka, Hideaki Mizuki, Keiichi Sato
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Publication number: 20020030309Abstract: An apparatus for producing reduced iron, and a compact drying method for application to the apparatus are disclosed. The apparatus comprises a pelletizer or a briquetter for mixing and agglomerating coal as a reducing agent and iron ore as iron oxide to form compacts, a dryer for drying the compacts, a circular rotary hearth type reducing furnace for reducing the dried compacts in a high temperature atmosphere, a first heat exchanger for performing heat exchange between a hot off-gas discharged from the reducing furnace and combustion air to be supplied to the reducing furnace, and coolers for cooling the hot off-gas. A second heat exchanger for heating drying air is disposed on an exit side of the first heat exchanger. The drying air heated by the second heat exchanger is supplied to the dryer to dry the compacts with the drying air scant in moisture. Consequently, highly efficient, stable drying in the dryer can be performed, and high quality reduced iron can be produced stably.Type: ApplicationFiled: September 17, 2001Publication date: March 14, 2002Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Susumu Kamikawa, Kouichi Hirata, Hironori Fujioka, Hideaki Mizuki, Keiichi Sato
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Publication number: 20020000687Abstract: Several methods and production facilities are provided in order to solve several problems encountered in conventional methods and facilities for producing reduced iron by reducing raw material pellets of a mixture of an iron oxide powder and a reducing material powder in a rotary bed-type reducing furnace and by melting the reduced iron in a sealed-type electro-blast furnace.Type: ApplicationFiled: July 26, 2001Publication date: January 3, 2002Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Hironori Fujioka, Hideaki Mizuki, Koichi Hirata, Shigeo Itano, Susumu Kamikawa, Hisao Teramoto, Takashi Yamane, Shigeki Sueda, Tetsumasa Kawamoto
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Patent number: 6312501Abstract: A method of producing raw material pellets, including forming pellets from a mixture of an iron oxide powder, a coal powder and a binder material after adding adjusting water to the mixture, and drying the pellets, wherein the binder material comprises at least one of tar and at least one of carboxymethylcellulose and polyvinylalcohol.Type: GrantFiled: August 31, 1999Date of Patent: November 6, 2001Assignee: Mitsubishi Heavy Industries, Ltd.Inventors: Hironori Fujioka, Hideaki Mizuki, Koichi Hirata, Shigeo Itano, Susumu Kamikawa, Hisao Teramoto, Takashi Yamane, Shigeki Sueda, Tetsumasa Kawamoto
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Publication number: 20010032527Abstract: Several methods and production facilities are provided in order to solve several problems encountered in conventional methods and facilities for producing reduced iron by reducing raw material pellets of a mixture of an iron oxide powder and a reducing material powder in a rotary bed-type reducing furnace and by melting the reduced iron in a sealed-type electro-blast furnace.Type: ApplicationFiled: May 4, 2001Publication date: October 25, 2001Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Hironori Fujioka, Hideaki Mizuki, Koichi Hirata, Shigeo Itano, Susumu Kamikawa, Hisao Teramoto, Takashi Yamane, Shigeki Sueda, Tetsumasa Kawamoto
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Publication number: 20010030389Abstract: In the production of reduced iron by agglomerating a mixed powder of an iron material and a reducing agent to form compacts like briquettes or pellets, and reducing the compacts in a high temperature atmosphere, when the temperature of reduced compacts is 900° C. or higher, the oxide content in the reduced compacts is set at 11 % or more, and the basicity of the reduced compacts is set at 0.5 or higher.Type: ApplicationFiled: June 25, 2001Publication date: October 18, 2001Applicant: Mitsubishi Heavy Industries, Ltd.Inventors: Susumu Kamikawa, Kouichi Hirata, Hironori Fujioka, Hideaki Mizuki, Keiichi Sato