JPS5472707A - Direct reduction method for iron oxide - Google Patents
Direct reduction method for iron oxideInfo
- Publication number
- JPS5472707A JPS5472707A JP14015977A JP14015977A JPS5472707A JP S5472707 A JPS5472707 A JP S5472707A JP 14015977 A JP14015977 A JP 14015977A JP 14015977 A JP14015977 A JP 14015977A JP S5472707 A JPS5472707 A JP S5472707A
- Authority
- JP
- Japan
- Prior art keywords
- kiln
- iron oxide
- exhaust gas
- raw material
- powder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Manufacture Of Iron (AREA)
Abstract
PURPOSE: To surely reduce iron oxide raw material in two steps with good efficiency by organically combining a fluidized bed system reducing process with a rotary kiln system reducing process.
CONSTITUTION: Preheated air C, iron oxide raw material A, carbonaceous powder B are introduced into fluidized furnace 1 to form fluidized bed D. A predetermined voltage is applied between electrodes 8, 8 to generate Joule heat in powder B such as coal powder, whereby a CO reducing atmosphere is formed in bed D to reduce raw material A. CO-contg. exhaust gas D is then introduced from exhaust gas outlet 12 into rotary kiln 13 to keep the inside of kiln 13 under a reducing atmosphere, reduced product E and carbonaceous substance F are supplied from furnace 1 to kiln 13, and necessary air, etc. are fed from feed pipe 19 to surely reduce product E to metallic iron. Part of exhaust gas of kiln 13 is introduced into preheater 5 for air, etc. and the remainder is introduced into kiln 13 again.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14015977A JPS5472707A (en) | 1977-11-22 | 1977-11-22 | Direct reduction method for iron oxide |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP14015977A JPS5472707A (en) | 1977-11-22 | 1977-11-22 | Direct reduction method for iron oxide |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5472707A true JPS5472707A (en) | 1979-06-11 |
Family
ID=15262232
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP14015977A Pending JPS5472707A (en) | 1977-11-22 | 1977-11-22 | Direct reduction method for iron oxide |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5472707A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0864658A1 (en) * | 1997-03-13 | 1998-09-16 | The Boc Group, Inc. | Refining iron ore |
-
1977
- 1977-11-22 JP JP14015977A patent/JPS5472707A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0864658A1 (en) * | 1997-03-13 | 1998-09-16 | The Boc Group, Inc. | Refining iron ore |
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