MUMBAI, India, Aug. 17 -- Intellectual Property India has published a patent application (202617083429 A) filed by Nippon Steel Corporation on July 07, 2026, for Method For Blowing Reducing Gas Into Blast Furnace, And Blast Furnace.
Inventors include Kamijo, Chikashi; Kumaoka, Hisashi; Sunahara, Kohei; Matsukura, Yoshinori; and Yokoyama, Hirokazu.
The application for the patent was published on August 14, 2026, under issue no. 33/2026.
Abstract: The present invention discloses a method with which it is possible to easily control the flow rate of a reducing gas when the reducing gas is blown into the inside of a blast furnace, and with which it is also possible to stably blow the reducing gas into the blast furnace even in cases where the slag or the like flows back into a hot air tuyere. A method for blowing a reducing gas into a blast furnace according to the present disclosure comprises: blowing hot air into the inside of the blast furnace from a hot air tuyere which is provided below the lower end of the shaft of the blast furnace and above the taphole; and blowing a reducing gas into the inside of the blast furnace from a reducing gas blowing port which is provided below the lower end of the shaft of the blast furnace and above the taphole. Here, the reducing gas functions as a reducing material inside the blast furnace. The reducing gas blowing port is provided separately from the hot air tuyere, and the height position P1 of the center of the reducing gas blowing port is located above the height position P2 of the center of the hot air tuyere.
Disclaimer: Curated by HT Syndication.
