JPS6465218A - Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operation - Google Patents
Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operationInfo
- Publication number
- JPS6465218A JPS6465218A JP22098587A JP22098587A JPS6465218A JP S6465218 A JPS6465218 A JP S6465218A JP 22098587 A JP22098587 A JP 22098587A JP 22098587 A JP22098587 A JP 22098587A JP S6465218 A JPS6465218 A JP S6465218A
- Authority
- JP
- Japan
- Prior art keywords
- reducing agents
- solid reducing
- axial center
- center part
- furnace bottom
- 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 adequately control the molten iron and molten slag at a furnace bottom by charging solid reducing agents at arbitrary frequencies to the axial center part of ore layers are controlling the charging ratio of the reducing agents in such a manner that the charging ratio of the reducing agents and the quantity of fluctuation in furnace bottom temp. satisfy the specific equation. CONSTITUTION:The solid reducing agents and ore are alternately charged to the blast furnace from the furnace top to laminate the solid reducing agents and the ore layers. The renewal of the furnace core solid reducing agent layers is controlled by charging the solid reducing agents at arbitrary frequencies to the axial center part of the ore layers or charging the solid reducing agents having good air permeability at arbitrary frequencies to the axial center part of the solid reducing agent layers at this time. The weight ratio of the solid reducing agents to be charged to the axial center part is controlled simultaneously in such a manner as to satisfy the relation between the weight ratio of the solid reducing agents to be charged to the axial center part (weight % to the total charge quantity of the solid reducing agents) and the quantity of fluctuation in furnace bottom temp. In the equation, RWc is the weight ratio of the solid reducing agents to be charged to the axial center part; Ts is the average temp. in the axial center part of the furnace bottom when the charge to the axial center is not operated; DELTAT is the difference between the furnace bottom temp. during the execution of the charge of the solid reducing agents to the axial center part and Ts; DELTAT/Ts is the quantity of fluctuation in furnace bottom temp. The molten iron and molten slag are thereby passed from the central part of the furnace bottom to a tap hole.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22098587A JPS6465218A (en) | 1987-09-03 | 1987-09-03 | Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operation |
| CA000576240A CA1338098C (en) | 1987-09-03 | 1988-08-31 | Method for operating blast furnace |
| AU21792/88A AU613399C (en) | 1987-09-03 | 1988-09-01 | Method for operating blast furnace |
| DE3889399T DE3889399T2 (en) | 1987-09-03 | 1988-09-01 | Process for operating a blast furnace. |
| EP88114291A EP0306026B1 (en) | 1987-09-03 | 1988-09-01 | Method for operating blast furnace |
| US07/239,655 US4963186A (en) | 1987-09-03 | 1988-09-02 | Method for operating blast furnace by adding solid reducing agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP22098587A JPS6465218A (en) | 1987-09-03 | 1987-09-03 | Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operation |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6465218A true JPS6465218A (en) | 1989-03-10 |
| JPH058248B2 JPH058248B2 (en) | 1993-02-01 |
Family
ID=16759662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP22098587A Granted JPS6465218A (en) | 1987-09-03 | 1987-09-03 | Method for controlling molten iron and molten slag flow in furnace bottom part in blast furnace operation |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6465218A (en) |
-
1987
- 1987-09-03 JP JP22098587A patent/JPS6465218A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH058248B2 (en) | 1993-02-01 |
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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: 20080201 Year of fee payment: 15 |