Patents by Inventor Tetsuharu Ibaraki

Tetsuharu Ibaraki 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).

  • Publication number: 20220287985
    Abstract: Provided is an organic nanoparticle production method comprising a step in which a mixture of beads having an average particle size at least 0.15 mm and no more than a value (mm) calculated by the formula 1.07?0.11×[outer peripheral speed of the stirring rotor (m/sec)] and a slurry containing organic particles is stirred by a stirring rotor rotating at an outer peripheral speed of 7 m/sec or less in a vessel of a wet bead mill.
    Type: Application
    Filed: August 14, 2020
    Publication date: September 15, 2022
    Applicant: HIROSHIMA METAL & MACHINERY CO., LTD
    Inventors: Yuya OCHII, Hironori TANAKA, Tetsuharu IBARAKI, Daisuke HIRATA
  • Publication number: 20220160634
    Abstract: A method for the production of the present disclosure comprises: a) a step of agitating a mixture containing a material to be ground, beads and a dispersion medium in a bead mill; and b) a step of adjusting the pH of the mixture. This method reduces a contamination caused by grinding process using a bead mill.
    Type: Application
    Filed: February 28, 2020
    Publication date: May 26, 2022
    Applicants: Shionogi & Co., Ltd., HIROSHIMA METAL & MACHINERY CO., LTD.
    Inventors: Hironori TANAKA, Yuya OCHII, Tetsuharu IBARAKI
  • Publication number: 20220034599
    Abstract: Provided are a novel heat utilization system and heat generating device that utilize an inexpensive, clean, and safe heat energy source. A heat utilization system 10 includes a heat-generating element 14 configured to generate heat by occluding and discharging hydrogen, a sealed container 15 having a first chamber 21 and a second chamber 22 partitioned by the heat-generating element 14, and a temperature adjustment unit 16 configured to adjust a temperature of the heat-generating element 14. The first chamber 21 and the second chamber 22 have different hydrogen pressures. The heat-generating element 14 includes a support element 61 made of at least one of a porous body, a hydrogen permeable film, and a proton conductor, and a multilayer film 62 supported by the support element 61.
    Type: Application
    Filed: December 11, 2019
    Publication date: February 3, 2022
    Inventors: Yasuhiro IWAMURA, Takehiko ITO, Jirota KASAGI, Hideki YOSHINO, Shotaro HIRANO, Masahide ISE, Tetsuharu IBARAKI
  • Publication number: 20220026113
    Abstract: A heat utilization system according to the invention includes: a sealed container into which a hydrogen-based gas is supplied; a heat generating structure that is accommodated in the sealed container and includes a heat generating element that is configured to generate heat by occluding and discharging hydrogen contained in the hydrogen-based gas; and a heat utilization device that utilizes, as a heat source, a heat medium heated by the heat of the heat generating element. The heat generating element includes a base made of a hydrogen storage metal, a hydrogen storage alloy, or a proton conductor, and a multilayer film provided on the base. The multilayer film has a first layer made of a hydrogen storage metal or a hydrogen storage alloy and having a thickness of less than 1000 nm and a second layer made of a hydrogen storage metal or a hydrogen storage alloy, which is different from that of the first layer, or ceramics and having a thickness of less than 1000 nm.
    Type: Application
    Filed: December 11, 2019
    Publication date: January 27, 2022
    Inventors: Yasuhiro IWAMURA, Takehiko ITO, Jirota KASAGI, Hideki YOSHINO, Shotaro HIRANO, Masahide ISE, Tetsuharu IBARAKI
  • Patent number: 9034074
    Abstract: In a method for producing a reduced iron pellet, when a powder formed article including iron oxide and carbon is heated and reduced in a rotary hearth furnace, a formed article produced using a raw material, in which an average diameter of the iron oxide is 50 microns or less and a ratio of carbon monoxide to carbon dioxide in a reduction zone is from 0.3 to 1, is reduced at a temperature of 1400° C. or less, thereby producing a reduced iron pellet in which a metallization ratio of iron is 50 to 85% and a ratio of residual carbon is 2% or less.
    Type: Grant
    Filed: September 11, 2008
    Date of Patent: May 19, 2015
    Assignee: NIPPON STEEL & SUMITOMO METAL CORPORATION
    Inventors: Tetsuharu Ibaraki, Hiroshi Oda
  • Patent number: 8440016
    Abstract: A ground granulated blast furnace slag for sulfate resistant cement comprising a mixture of ground granulated blast furnace slag with an alumina content of 12 to 17.5 mass % and high dissolution rate gypsum of 2 to 6 mass % of gypsum converted to mass of SO3.
    Type: Grant
    Filed: August 19, 2009
    Date of Patent: May 14, 2013
    Assignees: Nippon Steel & Sumitomo Metal Corporation, Nippon Steel Esment Kanto Co., Ltd
    Inventors: Tetsuharu Ibaraki, Yukihiko Nagao
  • Patent number: 8419851
    Abstract: Mixed cement containing mainly ground granulated blast furnace slag with an alumina ratio of 12 to 17.5 mass % and Portland cement, wherein a ratio of mixture of the ground granulated blast furnace slag is made 10 to 60 mass % and wherein plaster having a specific surface area of 7000 cm2/g or more is mixed in by a ratio of 2 to 4 mass % converted to SO3 mass. By using this mixed cement as a concrete material, it is possible to suppress expansion of the concrete even if in contact with soil containing residual sulfates over a long period.
    Type: Grant
    Filed: March 6, 2008
    Date of Patent: April 16, 2013
    Assignee: Nippon Steel & Sumitomo Metal Corporation
    Inventors: Tetsuharu Ibaraki, Yukihiko Nagao
  • Patent number: 8308844
    Abstract: A method of reduction treatment of metal oxides characterized by using as a material a powder containing metal oxides and containing alkali metals and halogen elements and further, in accordance with need, carbon, mixing the material with water to produce a slurry, then dehydrating this and charging the dehydrated material, mixed with another material in accordance with need, into a rotary hearth type reduction furnace for reduction.
    Type: Grant
    Filed: January 19, 2011
    Date of Patent: November 13, 2012
    Assignee: Nippon Steel Corporation
    Inventors: Hiroshi Ichikawa, Tetsuharu Ibaraki, Shoji Imura, Hiroshi Oda, Yoichi Abe, Shigeki Takahashi, Nobuyuki Kanemori, Satoshi Suzuki
  • Patent number: 8092574
    Abstract: In a method of producing a reduced iron cast, a cast of a powder which includes total iron of 40% or more and an atomic molar amount of fixed carbon of 0.7 to 1.5 times the atomic molar amount of oxygen compounded with metal oxide reduced in a carbon monoxide atmosphere at 1200° C. is reduced in a rotary hearth furnace. The method includes: producing, in an atmosphere at a maximum temperature of 1200° C. to 1420° C. at a ratio of carbon monoxide to carbon dioxide of 0.3 to 1.2 in the reduced zone, a reduced iron-containing material in which a ratio of metal iron is 50 mass % or more and a ratio of carbon is 5 mass % or less; and compression-molding the reduced iron-containing material at a temperature of 500° C. to 800° C. by a roller-type mold.
    Type: Grant
    Filed: September 2, 2008
    Date of Patent: January 10, 2012
    Assignee: Nippon Steel Corporation
    Inventor: Tetsuharu Ibaraki
  • Publication number: 20110214591
    Abstract: In sulfate resistant cement obtained by mixing ground granulated blast furnace slag, Portland cement, and high-dissolution rate gypsum for raising the sulfate resistance, the high-dissolution rate gypsum differs in grain size and specific gravity from the Portland cement, so uniform mixture is not easy. To obtain sulfate resistant cement exhibiting homogeneous initial solidification, it is important to uniformly mix the blast furnace slag, Portland cement, and high-dissolution rate gypsum. Therefore, by premixing ground granulated blast furnace slag with an alumina content of 12 to 17.5% with high-dissolution rate gypsum and then mixing in Portland cement, it is possible to obtain uniformly mixed sulfate resistant cement. At this time, the high-dissolution rate gypsum may be hemihydrate gypsum, type III anhydrous gypsum, or anhydrous gypsum with a specific surface area of 8000Blaine or more.
    Type: Application
    Filed: August 19, 2009
    Publication date: September 8, 2011
    Inventors: Tetsuharu Ibaraki, Yukihiko Nagao
  • Publication number: 20110113926
    Abstract: A method of reduction treatment of metal oxides characterized by using as a material a powder containing metal oxides and containing alkali metals and halogen elements and further, in accordance with need, carbon, mixing said material with water to produce a slurry, then dehydrating this and charging the dehydrated material, mixed with another material in accordance with need, into a rotary hearth type reduction furnace for reduction.
    Type: Application
    Filed: January 19, 2011
    Publication date: May 19, 2011
    Applicant: NIPPON STEEL CORPORATION
    Inventors: Hiroshi Ichikawa, Tetsuharu Ibaraki, Shoji Imura, Hiroshi Oda, Yoichi Abe, Shigeki Takahashi, Nobuyuki Kanemori, Satoshi Suzuki
  • Publication number: 20110023657
    Abstract: In a method for producing a reduced iron pellet, when a powder formed article including iron oxide and carbon is heated and reduced in a rotary hearth furnace, a formed article produced using a raw material, in which an average diameter of the iron oxide is 50 microns or less and a ratio of carbon monoxide to carbon dioxide in a reduction zone is from 0.3 to 1, is reduced at a temperature of 1400° C. or less, thereby producing a reduced iron pellet in which a metallization ratio of iron is 50 to 85% and a ratio of residual carbon is 2% or less.
    Type: Application
    Filed: September 11, 2008
    Publication date: February 3, 2011
    Inventors: Tetsuharu Ibaraki, Hiroshi Oda
  • Patent number: 7879132
    Abstract: A method of reduction treatment of metal oxides characterized by using as a material a powder containing metal oxides and containing alkali metals and halogen elements and further, in accordance with need, carbon, mixing said material with water to produce a slurry, then dehydrating this and charging the dehydrated material, mixed with another material in accordance with need, into a rotary hearth type reduction furnace for reduction.
    Type: Grant
    Filed: September 11, 2003
    Date of Patent: February 1, 2011
    Assignee: Nippon Steel Corporation
    Inventors: Hiroshi Ichikawa, Tetsuharu Ibaraki, Shoji Imura, Hiroshi Oda, Yoichi Abe, Shigeki Takahashi, Nobuyuki Kanemori, Satoshi Suzuki
  • Publication number: 20100199806
    Abstract: In a method of producing a reduced iron cast, a cast of a powder which includes total iron of 40% or more and an atomic molar amount of fixed carbon of 0.7 to 1.5 times the atomic molar amount of oxygen compounded with metal oxide reduced in a carbon monoxide atmosphere at 1200° C. is reduced in a rotary hearth furnace. The method includes: producing, in an atmosphere at a maximum temperature of 1200° C. to 1420° C. at a ratio of carbon monoxide to carbon dioxide of 0.3 to 1.2 in the reduced material, a reduced iron-containing material in which a ratio of metal iron is 50 mass % or more and a ratio of carbon is 5 mass % or less; and compression-molding the reduced iron-containing material at a temperature of 500° C. to 800° C. by a roller-type mold.
    Type: Application
    Filed: September 2, 2008
    Publication date: August 12, 2010
    Inventor: Tetsuharu Ibaraki
  • Publication number: 20100101458
    Abstract: Mixed cement containing mainly ground granulated blast furnace slag with an alumina ratio of 12 to 17.5 mass % and Portland cement, wherein a ratio of mixture of the ground granulated blast furnace slag is made 10 to 60 mass % and wherein plaster having a specific surface area of 7000 cm2/g or more is mixed in by a ratio of 2 to 4 mass % converted to SO3 mass. By using this mixed cement as a concrete material, it is possible to suppress expansion of the concrete even if in contact with soil containing residual sulfates over a long period.
    Type: Application
    Filed: March 6, 2008
    Publication date: April 29, 2010
    Inventors: Tetsuharu Ibaraki, Yukihiko Nagao
  • Publication number: 20090102088
    Abstract: Exemplary embodiments of the present invention can be directed to producing high-density pellets by molding waste plastic and to producing high-strength coke by mixing the pellets with coal and dry-distilling the mixture in a coke oven. As feedstock is used waste plastic that contains polyethylene, polypropylene and polystyrene, which are plastics that soften at a low temperature, at a total rate of about 50% or greater. The waste plastic is molded using a molding method of extruding it from a nozzle of a screw-type stuffing machine. In the method of this invention, the waste plastic can be heated to about 180˜260° C. in the molding machine and gas in the molding machine is sucked out. By this operation, the polyethylene, polypropylene and/or polystyrene are made molten and the amount of gas in the plastic is reduced. The plastic in this state is compression-molded by extrusion from a nozzle of about 15˜60 mm diameter.
    Type: Application
    Filed: November 13, 2006
    Publication date: April 23, 2009
    Inventors: Tetsuharu Ibaraki, Tsuneo Koseki, Yuuji Tooda, Takashi Hiromatsu, Yasuhiko Mori, Syuuichi Shiozawa, Masatoshi Sakatani, Takashi Sato
  • Patent number: 7192552
    Abstract: The present invention provides a reducing furnace of the rotary hearth-type and a method for reducing a metal oxide simplified in the process from dehydration to molding, according to which a moisture-rich powdery raw material is reduced at low cost. The present invention also provides an operation method whereby dusts or sludge generated in the refining or processing of metal are economically recycled. A powdery mixture having a moisture content of 100% or higher relative to the total mass of a metal oxide-containing powder and a carbon-containing powder is made into a slurry and mixed by stirring. Thereafter, the slurry is dehydrated to a moisture content of 16 to 26% and compression-molded into articles. The cylindrical or granular shaped articles having a thickness or diameter of 30 mm or less thus obtained are fed to a zone the atmospheric temperature of which is 1170° C. or lower in the furnace and reduced through calcination by a rotary hearth reducing furnace thereby to provide a metal.
    Type: Grant
    Filed: April 30, 2004
    Date of Patent: March 20, 2007
    Assignee: Nippon Steel Corporation
    Inventors: Tetsuharu Ibaraki, Takashi Hiromatsu, Satoshi Kondo, Shoji Imura, Yoichi Abe
  • Publication number: 20060096419
    Abstract: A method of reduction treatment of metal oxides characterized by using as a material a powder containing metal oxides and containing alkali metals and halogen elements and further, in accordance with need, carbon, mixing said material with water to produce a slurry, then dehydrating this and charging the dehydrated material, mixed with another material in accordance with need, into a rotary hearth type reduction furnace for reduction.
    Type: Application
    Filed: September 11, 2003
    Publication date: May 11, 2006
    Inventors: Hiroshi Ichikawa, Tetsuharu Ibaraki, Shoji Imura, Hiroshi Oda, Yoichi Abe, Shigeki Takahashi, Nobuyuki Kanemori, Satoshi Suzuki
  • Patent number: 6993855
    Abstract: The present invention provides: a method for drying compacts containing water so as not to cause explosion and powdering; a method for reducing the compacts after being dried with great efficiency in a rotary-hearth-type reducing furnace; and a rotary-hearth-type metal reducing furnace. In the present invention, when compacts comprising powder containing metal oxide and carbon are dried, the critical value of a water evaporation rate, beyond which explosion occurs, is determined from the size and porosity of the compacts, then the water evaporation rate is controlled to a value not exceeding the critical value and, by so doing, the increase in the internal pressure of the compacts caused by the generation of water vapor is prevented. By the method, the explosion and cracking of the compacts are prevented.
    Type: Grant
    Filed: April 1, 2002
    Date of Patent: February 7, 2006
    Assignee: Nippon Steel Corporation
    Inventors: Tetsuharu Ibaraki, Takashi Yamamoto, Yoichi Abe, Shigeki Takahashi, Kazunori Nagai
  • Patent number: 6986801
    Abstract: There is provided a method of producing reduced iron compacts with high crushing strength, low powderization and a high reduction rate in a solid reduction-type firing reducing furnace such as a rotary hearth-type reducing furnace, as well as reduced iron compacts obtained by the method and a method of melt-reducing the reduced iron compacts in a blast furnace.
    Type: Grant
    Filed: September 13, 2002
    Date of Patent: January 17, 2006
    Assignee: Nippon Steel Corporation
    Inventors: Tetsuharu Ibaraki, Shouji Imura, Hiroshi Oda, Masaharu Takahashi, Yoichi Abe, Shigeki Takahashi, Satoshi Suzuki