Patents Assigned to Kawasaki Steel Techno-Research Corporation
  • Publication number: 20030089884
    Abstract: The present application provides a deoxidizer comprising an alkaline compound, silicon, a porous substance, water and at least one organic acid selected from the group consisting of ascorbic acid, isomers thereof and phenol derivatives where pH of an extract when 1 g of the deoxidizer is extracted with 10 ml of water is 8 or lower. The deoxidizer does not generate hydrogen gas and achieves an excellent deoxidizing ability even at from weakly alkaline to acidic regions. When a suppressant for generation of hydrogen is further added to the deoxidizer, generation of hydrogen is suppressed even when the pH is 10 or lower and an excellent deoxidizing ability can be maintained as well. Those deoxidizers do not interfere with the food test using a metal detector.
    Type: Application
    Filed: October 11, 2002
    Publication date: May 15, 2003
    Applicant: MARUKATSU SANGYO CORPORATION AND KAWASAKI STEEL TECHNO-RESEARCH CORPORATION
    Inventors: Hiroshi Nakazawa, Tsuneo Kinjo
  • Patent number: 6431253
    Abstract: When a waste wax composition containing a filler is treated so that the filler is recovered and thus reclaimed, almost all the impurities coming from the lost wax casting mold may be removed, thereby recovering and thus refining at a high purity, a filler of a lost wax composition. Crude reclaimed filler is first produced by dissolving and dispersing a waste wax composition in an organic solvent, and separating a dissolved wax phase from a solids/wax-containing fraction. The crude reclaimed filler is then dispersed in an aqueous alkaline solution, so as to dissolve and thus remove alkali-soluble impurities, followed by a water-washing process.
    Type: Grant
    Filed: December 4, 2001
    Date of Patent: August 13, 2002
    Assignee: Kawasaki Steel Techno-Research Corporation
    Inventor: Tsuneo Kinjo
  • Patent number: 6352098
    Abstract: When a waste wax composition containing a filler is treated so that the filler is recovered and thus reclaimed, almost all the impurities coming from the lost wax casting mold may be removed, thereby recovering and thus refining at a high purity, a filler of a lost wax composition. Crude reclaimed filler is first produced by dissolving and dispersing a waste wax composition in an organic solvent, and separating a dissolved wax phase from a solids/wax-containing fraction. The crude reclaimed filler is then dispersed in an aqueous alkaline solution, so as to dissolve and thus remove alkali-soluble impurities, followed (or preceded) by dispersion in an acidic aqueous solution so as to dissolve and thus remove acid-soluble impurities.
    Type: Grant
    Filed: September 12, 2000
    Date of Patent: March 5, 2002
    Assignee: Kawasaki Steel Techno-Research Corporation
    Inventor: Tsuneo Kinjo
  • Patent number: 6066250
    Abstract: A used investment casting wax composition containing a filler and/or a residue after a wax component is removed from the composition is dissolved or dispersed into an organic solvent. The mixture is separated into a dissolved wax fraction and a wax-containing solids fraction. The organic solvent in the dissolved wax fraction is removed to recover a wax component, while the wax component and the organic solvent in the wax-containing solids fraction are removed to recover a crude filler. The crude filler is washed with water and/or an aqueous alkaline solution to recover a high-purity filler. A reclaimed investment casting wax thus obtainable is less degraded by heat.
    Type: Grant
    Filed: November 5, 1998
    Date of Patent: May 23, 2000
    Assignee: Kawasaki Steel Techno-Research Corporation
    Inventor: Tsuneo Kinjo
  • Patent number: 5715328
    Abstract: The present invention provides a method and apparatus for accurately diagnosing a state of damage on a wall of a coking chamber of a coke battery. The method includes accurately diagnosing the damage state of the chamber wall by combination of three detection means. The three detection means include means for photographing the wall of the coking chamber of the coke battery, means for detecting the chamber width between chamber walls by laser range finders, and means for detecting the chamber temperature by radiation thermometers. The joints and the brick surfaces of the coke battery is photographed by a CCD camera. The image of the chamber wall is separated into images of the joints and the brick surfaces. The states of the joints and the brick surfaces are separately recognized to accurately detect damage of the joints and damage of the brick surfaces.
    Type: Grant
    Filed: February 12, 1996
    Date of Patent: February 3, 1998
    Assignee: Kawasaki Steel Techno-Research Corporation
    Inventor: Yuji Tsukihara
  • Patent number: 4798704
    Abstract: A preheating apparatus of an analysis apparatus for determining the in quantity hydrogen and carbon contained in a sample such as steel is employed to remove moisture adhered to a sample of the steel by spot-heating focused on the sample in a transparent bent tube which is turned one-half in its circumferential direction after completion of its preheating to make it possible for the sample to be transfered by gravity from the bent tube into a graphite crucible in which the sample is fused to extract hydrogen and carbon contained in the sample, so that the thus extracted hydrogen and carbon are determined.
    Type: Grant
    Filed: October 6, 1986
    Date of Patent: January 17, 1989
    Assignee: Kawasaki Steel Techno-Research Corporation
    Inventors: Keiji Saito, Yoshiro Takizawa, Isao Takagi
  • Patent number: 4718992
    Abstract: An aqueous electrolytic solution of a molybdate ion and an oxidizing agent is effective to detect phosphorus segregates in a metallic material, particularly cast steel through electrolysis. Segregated phosphorus can be detected by (a) applying a test sheet against a surface area of the metallic material to be examined for segregation, (b) introducing an aqueous electrolytic solution comprising 0.1 to 20% by weight of a molybdate ion and an oxidizing agent between the metallic material surface area and the sheet, (c) contacting a cathode plate with the sheet, (d) effecting electrolysis with the metallic material made anode, (e) removing the sheet from the metallic material surface, and (f) treating the sheet with a reducing agent.
    Type: Grant
    Filed: August 19, 1986
    Date of Patent: January 12, 1988
    Assignees: Kawasaki Steel Corporation, Kawasaki Steel Techno-Research Corporation
    Inventors: Yoshiko Funahashi, Yoshikazu Kamino, Yasuharu Matsumura, Senichi Harimaya