Modernization of DRI shaft furnaces to improve performance and product quality
Author(s) G. M, Yakov, N.A, Spirin
AISTech 2021 — Proceedings of the Iron & Steel Technology Conference 29 June–1 July 2021, Nashville, Tenn., USA
Abstract
Gas dynamics and gas distribution in shaft furnace play a crucial role in improvement of furnace productivity, product quality and reduction in natural gas rate. Optimum design parameters of gas distribution devices were investigated by means of mathematical modeling, pilot plant and industrial installation studies. New heat transfer co-current schematics of gas and material movement with self-reforming of natural gas in metallization zone was invented, patented and tested at the pilot plant. New shaft furnace design and improvements were proposed and new gas distribution deviCes were implemented, providing savings in fuel rate, increase in productivity and improvements in the quality of direct reduced iron.