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1. (WO2018085514) DIRECT REDUCTION PROCESS AND SHAFT FURNACE UTILIZING AN EXTENDED FLOW DIVERTER CONE

Pub. No.:    WO/2018/085514    International Application No.:    PCT/US2017/059682
Publication Date: Sat May 12 01:59:59 CEST 2018 International Filing Date: Fri Nov 03 00:59:59 CET 2017
IPC: C21B 13/02
F27B 1/24
F27D 9/00
F27D 15/02
Applicants: MIDREX TECHNOLOGIES, INC.
Inventors: VOELKER, Brian
MICHISHITA, Haruyasu
WRIGHT, Travis
Title: DIRECT REDUCTION PROCESS AND SHAFT FURNACE UTILIZING AN EXTENDED FLOW DIVERTER CONE
Abstract:
A shaft furnace for producing metallic direct reduced iron (DRI) from iron-containing pellets or lumps and reducing gas disposed therein, including: a circumferential outer wall defining a top interior reducing zone, a middle interior transition zone, and a bottom interior cooling zone, wherein the iron-containing pellets or lumps travel downwards through the top interior reducing zone, the middle interior transition zone, and the bottom interior cooling zone as the iron-containing pellets or lumps encounter the upward-flowing reducing gas and one or more other gases; and a flow diverter disposed along a centerline of the circumferential outer wall including a convex-upwards upper tapering section disposed in the middle transition zone defined by the circumferential outer wall coupled to a convex-downwards lower tapering section disposed in the bottom cooling zone defined by the circumferential outer wall.