MUMBAI, India, July 7 -- Intellectual Property India has published a patent application (202617069985 A) filed by Jfe Steel Corporation on June 04, 2026, for Blast Furnace Tuyere Apparatus And Method Of Operating Blast Furnace.
Inventors include Kuwabara Minoru; Kaneyama Shinnosuke; Morita Yuya; Goto Shuhei Number; and Yanagisawa Ryuta.
The application for the patent was published on July 03, 2026, under issue no. 27/2026.
Abstract: A tuyere apparatus according to the present invention comprises: an outer circulation hole disposed on the outermost peripheral side inside a tuyere; and an inner circulation hole disposed on the inner peripheral side of the outer circulation hole. The inner circulation hole has two or more independent flow paths, the two or more independent flow paths being separated from the inner surface of the tuyere. A blast furnace operation method according to the present invention comprises, using the above-described blast furnace tuyere apparatus in a blast furnace: blowing a low oxygen concentration gas, a high oxygen concentration gas having an oxygen concentration higher than that of the low oxygen concentration gas, and a reduction material from the tuyere; blowing the low concentration oxygen gas from the outer circulation hole; blowing the high oxygen concentration gas and the reduction material from the inner circulation hole; and blowing the high oxygen concentration gas and the reduction material separately from the two or more independent flow paths.
Disclaimer: Curated by HT Syndication.
