MUMBAI, India, Sept. 7 -- Intellectual Property India has published a patent application (202617085637 A) filed by Nippon Steel Corporation on July 13, 2026, for Method For Blowing Reducing Gas Into Blast Furnace And Blast Furnace.
Inventors include Matsukura, Yoshinori; Kumaoka, Hisashi; Sunahara, Kohei; Kamijo, Chikashi; and Yokoyama, Hirokazu.
The application for the patent was published on September 04, 2026, under issue no. 36/2026.
Abstract: Disclosed is a method by which it is possible to suppress drift of a reducing gas when a reducing gas having a low specific gravity is blown into the interior of a blast furnace. A method for blowing a reducing gas into a blast furnace according to the present disclosure comprises: blowing hot air into the interior of the blast furnace from a hot air tuyere provided below the lower end of the shaft of the blast furnace and above a tap hole; and blowing the reducing gas into the interior of the blast furnace through a reducing gas blowing lance that is provided in the wall surface of the hot air tuyere and that has an opening at the tip end of the hot air tuyere. The reducing gas functions as a reducing material in the interior of the blast furnace, and the specific gravity of the reducing gas is lower than the specific gravity of the hot air. The height position P1 of the center of the opening of the reducing gas blowing lance is the same as the height position P2 of the center of the hot air tuyere, or is below the height position P2.
Disclaimer: Curated by HT Syndication.
