Patents by Inventor Makio Yamashita

Makio Yamashita 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: 20200030853
    Abstract: The present invention provides a method for reforming coal ash, including classifying coal ash having 10% by mass or more of a residue on a 45 ?m sieve by using a forced vortex centrifugal type classifying apparatus, under a condition that the residue on a 45 ?m sieve of the coal ash after the classifying becomes in a range of 1% by mass or more and 8% by mass or less.
    Type: Application
    Filed: February 8, 2018
    Publication date: January 30, 2020
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Koota DOI, Makio YAMASHITA
  • Publication number: 20200031713
    Abstract: There is provided a method for reforming unburned carbon-containing coal ash of the present invention, including: a receiving process of measuring L value and b value of unburned carbon-containing coal ash in a Lab color order system and sorting unburned carbon-containing coal ash of which the L value is 54 or more and the b value is 2 or more and 10 or less; and a classifying process of classifying the unburned carbon-containing coal ash sorted in the receiving process under a condition that a residue on a 45 ?m sieve of reformed coal ash which has been reformed by classification is 8% by mass or less.
    Type: Application
    Filed: March 19, 2018
    Publication date: January 30, 2020
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Makio YAMASHITA, Koota DOI
  • Patent number: 9868666
    Abstract: The cement clinker production system includes: a first supplying section configured to supply a sulfur source and a fluorine source of mineralizer; a second supplying device configured to supply clinker raw material; a crusher configured to crush the mixed raw material obtained by mixing the clinker raw material with the fluorine source of the mineralizer; a kiln configured to burn the crushed mixed raw material; an introducing section configured to introduce the sulfur source of the mineralizer to the kiln; a third supplying section configured to supply fuel to the kiln; and a test sample-analyzing system configured to collect each of the mixed raw material before the burning and the clinker after the burning and to measure amounts of the fluorine, main components and free lime depending on the type collected.
    Type: Grant
    Filed: December 20, 2012
    Date of Patent: January 16, 2018
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Makio Yamashita, Hisanobu Tanaka, Yukio Tanaka, Katsuhiko Ichihara, Kazuo Sakamoto, Kazuo Tabata
  • Patent number: 9650294
    Abstract: This burned cement clinker is a burned cement clinker including at least one selected from the group consisting of fluorine, sulfur, chlorine and bromine, and at least one metallic element(s) selected from the group consisting of elements in groups 3 through 12 of the periodic table. Preferably, the amount of fluorine is within a range from 300 to 750 mg/kg, the amount of sulfur (expressed in terms of SO3) is within a range from 1.5 to 3.0% by mass, the amount of at least one chlorine equivalent(s) selected from the group consisting of chlorine and bromine is within a range from 150 to 350 mg/kg, and the amount of at least one metallic element selected from the group consisting of elements in groups 3 through 12 of the periodic table is within a range from 0.2 to 0.8% by mass.
    Type: Grant
    Filed: March 11, 2011
    Date of Patent: May 16, 2017
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Makio Yamashita, Yoichiro Nakanishi, Hisanobu Tanaka
  • Patent number: 9598312
    Abstract: Provided is a method for controlling a free lime content of a clinker by regulating the free lime content. Here the amount of sulfur trioxide resulting from fuel and the used amount of a fluorine-based mineralizer are regulated using the following Formulas (1) to (3), thereby controlling the free lime content (f.CaO) of the clinker. f.CaO=0.29×e(0.65×A)(A=a×SO3+b)??(1) a=0.0001×F+9.2×t?0.18×HM?9.2??(2) b=?0.0005×F?32.8×t?2.9×HM+28.4??(3) SO3 is an amount of sulfur trioxide in the clinker; a is a coefficient satisfying Formula (2); b is a coefficient satisfying Formula (3); F is an amount of fluorine in the clinker; when a burning temperature is X° C., t=X/1450; and HM is a hydraulic modulus.
    Type: Grant
    Filed: March 8, 2013
    Date of Patent: March 21, 2017
    Assignee: MITSUBISHI MATERIALS CORPORATION
    Inventors: Yuuki Ninomiya, Hisanobu Tanaka, Makio Yamashita, Yoichiro Nakanishi
  • Publication number: 20150321956
    Abstract: Provided is a method for controlling a free lime content of a clinker by regulating the free lime content. Here the amount of sulfur trioxide resulting from fuel and the used amount of a fluorine-based mineralizer are regulated using the following Formulas (1) to (3), thereby controlling the free lime content (f.CaO) of the clinker. f.CaO=0.29×e0.65×A)(A=a×SO3+b)??(1) a=0.0001×F+9.2×t?0.18×HM?9.2??(2) b=?0.0005×F?32.8×t?2.9×HM+28.4??(3) SO3 is an amount of sulfur trioxide in the clinker; a is a coefficient satisfying Formula (2); b is a coefficient satisfying Formula (3); F is an amount of fluorine in the clinker; when a burning temperature is X° C., t=X/1450; and HM is a hydraulic modulus.
    Type: Application
    Filed: March 8, 2013
    Publication date: November 12, 2015
    Inventors: Yuuki Ninomiya, Hisanobu Tanaka, Makio Yamashita, Yoichiro Nakanishi
  • Publication number: 20150246849
    Abstract: The cement clinker production system includes: a first supplying section configured to supply a sulfur source and a fluorine source of mineralizer; a second supplying device configured to supply clinker raw material; a crusher configured to crush the mixed raw material obtained by mixing the clinker raw material with the fluorine source of the mineralizer; a kiln configured to burn the crushed mixed raw material; an introducing section configured to introduce the sulfur source of the mineralizer to the kiln; a third supplying section configured to supply fuel to the kiln; and a test sample-analyzing system configured to collect each of the mixed raw material before the burning and the clinker after the burning and to measure amounts of the fluorine, main components and free lime depending on the type collected.
    Type: Application
    Filed: December 20, 2012
    Publication date: September 3, 2015
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Makio Yamashita, Hisanobu Tanaka, Yukio Tanaka, Katsuhiko Ichihara, Kazuo Sakamoto, Kazuo Tabata
  • Publication number: 20130000524
    Abstract: This burned cement clinker is a burned cement clinker including at least one selected from the group consisting of fluorine, sulfur, chlorine and bromine, and at least one metallic element(s) selected from the group consisting of elements in groups 3 through 12 of the periodic table. Preferably, the amount of fluorine is within a range from 300 to 750 mg/kg, the amount of sulfur (expressed in terms of SO3) is within a range from 1.5 to 3.0% by mass, the amount of at least one chlorine equivalent(s) selected from the group consisting of chlorine and bromine is within a range from 150 to 350 mg/kg, and the amount of at least one metallic element selected from the group consisting of elements in groups 3 through 12 of the periodic table is within a range from 0.2 to 0.8% by mass.
    Type: Application
    Filed: March 11, 2011
    Publication date: January 3, 2013
    Inventors: Makio Yamashita, Yoichiro Nakanishi, Hisanobu Tanaka
  • Patent number: 7998270
    Abstract: A cement clinker which necessitates no considerable change in the main chemical components and mineral components of cement, is free from preheater coating problems and adverse influences on cement properties, and is effective in reducing the heat quantity required for burning; and a process for producing the cement clinker. In the process for cement clinker production a substance having a melting point higher than the temperature of a liquid phase of the cement clinker and serving as crystal nuclei for C3S is incorporated include a fine powder of refractory brick, particles of an ordinary Portland cement clinker, a fine powder of a high-early-strength Portland cement clinker, a high-early-strength Portland cement, and a fine powder of quicklime. Due to this, alite generation is accelerated even at a low temperature. As a result, high-quality clinker can be produced through burning using a small unit heat quantity and no decrease in cement quality results.
    Type: Grant
    Filed: December 2, 2005
    Date of Patent: August 16, 2011
    Assignee: Mitsubishi Materials Corporation
    Inventors: Etsuro Asakura, Kenichi Shimosaka, Makio Yamashita, Ryuichi Komatsu
  • Publication number: 20080190328
    Abstract: A cement clinker which necessitates no considerable change in the main chemical components and mineral components of cement, is free from preheater coating problems and adverse influences on cement properties, and is effective in reducing the heat quantity required for burning; and a process for producing the cement clinker. In the process for cement clinker production a substance having a melting point higher than the temperature of a liquid phase of the cement clinker and serving as crystal nuclei for C3S is incorporated include a fine powder of refractory brick, particles of an ordinary Portland cement clinker, a fine powder of a high-early-strength Portland cement clinker, a high-early-strength Portland cement, and a fine powder of quicklime. Due to this, alite generation is accelerated even at a low temperature. As a result, high-quality clinker can be produced through burning using a small unit heat quantity and no decrease in cement quality results.
    Type: Application
    Filed: December 2, 2005
    Publication date: August 14, 2008
    Applicant: MITSUBISHI MATERIALS CORPORATION
    Inventors: Etsuro Asakura, Kenichi Shimosaka, Makio Yamashita, Ryuichi Komatsu