Inventor
CHOI NAG-JOON
KR7 patents
⚠️ This page may combine multiple inventors who share the name “CHOI NAG-JOON”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
PO HANG IRON & STEEL
4 patentsUS6110413AAug 29, 2000
3-Stage fluidized bed type fine iron ore reducing apparatus having x-shaped circulating tubes
PO HANG IRON & STEEL26 citations89
US6585798B2Jul 1, 2003
Fluidized bed reactor for preventing the fine iron ore from sticking therein and method thereof
PO HANG IRON & STEEL15 citations79
US6235079B1May 22, 2001
Two step twin-single fluidized bed pre-reduction apparatus for pre-reducing fine iron ore, and method therefor
PO HANG IRON & STEEL8 citations70
US6491738B1Dec 10, 2002
2-stage fluidized bed type fine iron ore reducing apparatus, and reducing method using the apparatus
PO HANG IRON & STEEL3 citations60