JPS6465217A - Method for suppressing erosion of refractory wall in peripheral part of furnace bottom in blast furnace operation - Google Patents
Method for suppressing erosion of refractory wall in peripheral part of furnace bottom in blast furnace operationInfo
- Publication number
- JPS6465217A JPS6465217A JP22098487A JP22098487A JPS6465217A JP S6465217 A JPS6465217 A JP S6465217A JP 22098487 A JP22098487 A JP 22098487A JP 22098487 A JP22098487 A JP 22098487A JP S6465217 A JPS6465217 A JP S6465217A
- Authority
- JP
- Japan
- Prior art keywords
- solid reducing
- reducing agents
- furnace
- furnace bottom
- axial center
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/008—Composition or distribution of the charge
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
PURPOSE:To suppress the erosion of the refractory walls in the peripheral part of a furnace bottom by charging a specific quantity of solid reducing agents to the axial center part of ore layers and solid reducing agents having good air permeability to the axial center part of solid reducing agent layers and passing the molten iron and molten slag dropped to the furnace bottom to a tap hole from the central part of the furnace bottom. CONSTITUTION:The blast furnace operation is carried out by alternately charging the solid reducing agents and ore to the blast furnace from the furnace top and laminating the solid reducing agents and the ore layers. The solid reducing agents of the quantity exceeding 0.2wt.% of the total charge quantity of the solid reducing agents are charged to the axial center part of ore layers or the solid reducing agents having the good air permeability are charged to the axial center part of the solid reducing agent layers at this time. The air permeability in the central part of the furnace core is thereby improved and the molten iron and molten slag dropped to the furnace bottom are passed through the central part at the furnace top to the tap hole, by which the erosion of the refractory walls in the peripheral part of the furnace bottom is suppressed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22098487A JPS6465217A (en) | 1987-09-03 | 1987-09-03 | Method for suppressing erosion of refractory wall in peripheral part of furnace bottom in blast furnace operation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22098487A JPS6465217A (en) | 1987-09-03 | 1987-09-03 | Method for suppressing erosion of refractory wall in peripheral part of furnace bottom in blast furnace operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6465217A true JPS6465217A (en) | 1989-03-10 |
| JPH0377844B2 JPH0377844B2 (en) | 1991-12-11 |
Family
ID=16759646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22098487A Granted JPS6465217A (en) | 1987-09-03 | 1987-09-03 | Method for suppressing erosion of refractory wall in peripheral part of furnace bottom in blast furnace operation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6465217A (en) |
-
1987
- 1987-09-03 JP JP22098487A patent/JPS6465217A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0377844B2 (en) | 1991-12-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071211 Year of fee payment: 16 |