MUMBAI, India, Oct. 24 -- Intellectual Property India has published a patent application (202421031056 A) filed by Jindal Steel & Power Limited, Raigarh, Chattisgarh, on April 18, 2024, for 'a method for performing a desulfurization of sponge iron in a dri kiln.'

Inventor(s) include Sabyasachi Bandopadhyay; Dhirendra Prasad Kushwaha; Satish Chandra Singh; Bharat Swarnakar; Vimal Prakash Mishra; and Sourin Das.

The application for the patent was published on Oct. 24, under issue no. 43/2025.

According to the abstract released by the Intellectual Property India: "A method for performing desulfurization in a coal based DR kiln is disclosed. The method includes feeding a first predetermined amount of iron-ore in a DR kiln from the feed end. The method includes feeding a second predetermined amount of coal into the DR kiln from the feed end. The method includes feeding a third predetermined amount of coal into the DR kiln from the injection end. The method includes rotating the DR Kiln at a pre-determined value of RPM to obtain an output, characterized in that, feeding a predetermined quantity of Calcined Lime from the injection side in the DR kiln for de-sulfurization. The output obtained is sponge iron with a minimum quantity of Sulfur."

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