MUMBAI, India, Nov. 14 -- Intellectual Property India has published a patent application (202517095053 A) filed by Nippon Steel Corporation, Tokyo, on Oct. 3, for 'sintered ore production method.'

Inventor(s) include Katayama Kazuaki; Matsumura Masaru; and Yabe Hideaki.

The application for the patent was published on Nov. 14, under issue no. 46/2025.

According to the abstract released by the Intellectual Property India: "This sintered ore production method comprises: a step for forming a lower-stage raw-material-filled layer (10) by charging a lower-stage blended granular raw material into a sintering machine (100); a step for forming an upper-stage raw-material-filled layer(20) by charging an upper-stage blended granular raw material on the lower-stage raw-material-filled layer; a step for igniting the surface of the lower-stage raw-material-filled layer and the surface of the upper-stage raw-material-filled layer, respectively, and introducing an oxygen-containing gas into the lower-stage raw-material-filled layer and the upper-stage raw-material-filled layer through downward-suctioning (6) under atmospheric pressure. At least a portion of the gas suctioned downward from the surface side of the upper-stage raw-material-filled layer after the completion of ignition of the upper-stage raw-material-filled layer is made to be an oxygen-enriched gas with an oxygen concentration of 26 vol% to 46 vol%. A region in which the oxygen-enriched gas is supplied is a region including a part of a first half section, when in the longitudinal direction of the sintering machine, a middle position of a section from immediately after an outlet (X) of an upper-stage ignition furnace (2C) to an ore discharge end (Y) is defined as a middle position (Z), and a section from immediately after the outlet (X) of the upper-stage ignition furnace to the middle position (Z) is defined as the first half section."

The patent application was internationally filed on Apr. 03, 2023, under International application No.PCT/JP2023/013751.

Disclaimer: Curated by HT Syndication.