Patents Assigned to Osaka Iron & Steel Co., Ltd.
  • Method of treating ferruginous slags
    Patent number: 4141722
    Abstract: The disclosure is of a method of treating ferruginous metallurgical slags to lower basicity, stabilize their composition, reduce their melting point and stabilize the slag in regard to dusting and slaking. The stabilized slag is useful as an artificial sand or as an aggregated sand useful in the manufacture of concrete and like compositions.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: February 27, 1979
    Assignee: Osaka Iron & Steel Co., Ltd.
    Inventors: Kiyoshi Takai, Naraharu Yamamoto, Seiichi Yamamoto
  • Ferruginous slag oxidizing apparatus
    Patent number: 4062531
    Abstract: The disclosure is of apparatus useful for oxidizing and mixing molten ferruginous metallurgical slags such as converter slag, electric steel making furnace slag and open hearth furnace slag.
    Type: Grant
    Filed: January 24, 1977
    Date of Patent: December 13, 1977
    Assignee: Osaka Iron & Steel Co., Ltd.
    Inventor: Kiyoshi Takai