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1. (WO2001032941) FLUIDIZED BED BREAKAGE PREVENTION SYSTEM FOR FLUIDIZED BED REDUCTION REACTOR

Pub. No.:    WO/2001/032941    International Application No.:    PCT/KR2000/001257
Publication Date: Fri May 11 01:59:59 CEST 2001 International Filing Date: Sat Nov 04 00:59:59 CET 2000
IPC: C21B 13/00
C21B 13/14
Applicants: POHANG IRON & STEEL CO., LTD.
RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY
VOEST-ALPINE INDUSTRIEANLAGENBAU GMBH
SHIN, Myoung-Kyun
LEE, Jun-Hyuk
JEONG, Sun-Kwang
CHOI, Nag-Joon
KIM, Hang-Goo
KANG, Heung-Won
Inventors: SHIN, Myoung-Kyun
LEE, Jun-Hyuk
JEONG, Sun-Kwang
CHOI, Nag-Joon
KIM, Hang-Goo
KANG, Heung-Won
Title: FLUIDIZED BED BREAKAGE PREVENTION SYSTEM FOR FLUIDIZED BED REDUCTION REACTOR
Abstract:
A fluidized bed reduction reactor (100) for supplying a reduced iron to a melter-gasifier (1) of a smelting reduction system includes an exhaust gas supply unit (3) for supplying an exhaust gas to a reduction gas supply tube (4) interconnecting the melter-gasifier (1) and fluidized bed reduction furnaces (20, 30, 40) when the pressure of the reduction gas in each fluidized bed reduction furnace radically decreases with the occurrence of pressure peak in the melter-gasifier (1). The fluidized bed reduction reactors further include iron ore flow blockage prevention units for directly bypassing some of the reduction gas from each iron ore discharge tube (33, 43) disposed between the neighboring furnaces to the scrubber (50) when the inner pressure of the melter-gasifier (1) radically increases with the occurrence of pressure peak, and a backup gas supply unit supplying a backup nitrogen gas to the bottom of each fluidized bed reduction furnace when a nozzle of a distribution plate (24, 34, 44) is clogged.