MUMBAI, India, July 25 -- Intellectual Property India has published a patent application (202421003527 A) filed by Jsw Steel Limited, Maharashtra, on Jan. 18, 2024, for 'a sinter mix composition involving basic oxygen furnace steel slag as partial replacement of flux in sinter making.'
Inventor(s) include Dhanraj Patil; Rameshwar Sah; B R Srinidhi; Vinayak B; and Shyam Yadav.
The application for the patent was published on July 25, under issue no. 30/2025.
According to the abstract released by the Intellectual Property India: "The present invention discloses a sinter mix composition involving basic oxygen furnace steel slagdirected to optimize the production of sinterwith reduced consumption of lime and dolomite. The composition comprises iron ore, coke breeze, anthracite coal, calcined lime, limestone, dolomite, return fines, and non-metallic Basic Oxygen Furnace (BOF)converter steel slag. A sinter mix comprising of Iron ore 34 to 42 wt %, Coke breeze 2.6 to 4.6 wt %, Anthracite coal 1.6 to 2.8wt %, Calcined Lime 3.0to 4.2 wt %, Limestone 3.2to 5.2wt %, Dolomite 4.4to 5.4wt % and Return fines 39 to 47wt %, non-metallic BOF slag 1 to 3wt %.The non-metallic BOF slag is impartingspecific metallurgical properties to the sinter. Additionally, the sinter exhibits a Tumbler Index within the range of 75 to 78% and a Reducibility Index (RDI) between 19 to 23 %, which are well within the industrially acceptable limits, while offering raw material conservation, improved efficiency, cost-effectiveness, and sustainability associated with reducing waste slag, and calcination impact of lime stone."
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