CN108546791A - Vanadium titano-magnetite blast furnace process replies immediately wind method soon - Google Patents
Vanadium titano-magnetite blast furnace process replies immediately wind method soon Download PDFInfo
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- CN108546791A CN108546791A CN201810349797.4A CN201810349797A CN108546791A CN 108546791 A CN108546791 A CN 108546791A CN 201810349797 A CN201810349797 A CN 201810349797A CN 108546791 A CN108546791 A CN 108546791A
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- damping down
- blast furnace
- down time
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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- 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
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/04—Making slag of special composition
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
Disclosed by the invention is that a kind of vanadium titano-magnetite blast furnace process of vanadium titano-magnetite technical field of blast furnace process replies immediately wind method soon, multiple wind is carried out by using rational charging system, blowing system, slagging regime and thermal system, specially：Charging system：It is fed using 2~3 ring clothes, and ensures that ore outer shroud is controlled with outer burnt differential seat angle at 1~3 °, ore inner ring is with interior burnt differential seat angle control at 5~6 °；Blowing system：The size for adjusting 2~8 and the air port of iron mouth angle in 90 ° makes its air supply areas reduce 5%~25%；Slagging regime：The dual alkalinity of clinker lowers 0.01~1.05；Thermal system：Furnace temperature is controlled, ensures the mass percent of Si and Ti total contents in molten iron 0.30%~0.60%.Advantage is the mobility of the contact area for improving raw material and air, wind speed and mixed material, to greatly accelerate the speed that blast furnace is restored to situation before damping down.
Description
Technical field
The present invention relates to vanadium titano-magnetite technical field of blast furnace process more particularly to a kind of vanadium titano-magnetite blast furnace processes
Multiple wind method.
Background technology
Blast furnace can carry out damping down maintenance, after debugging again in use for some time or when encountering special accident
Carry out multiple wind, and with the enlargement of blast furnace and the in poor quality of raw material and fuel quality, make furnace compound wind process be more difficult to control and
It is difficult to it is anticipated that control bad or even furnace condition disorder can be caused, leads to that the long-term disposal working of a furnace, operating mode index deteriorate, process consumed
A series of problems, such as high, thus multiple wind scheme directly determine follow-up furnace condition recovery process, economic and technical norms, process consumption and
Can the working of a furnace maintain a long-term stability operation.Existing multiple wind mode makes the working of a furnace typically just by being adjusted to air force
Slowly restore, this process is quite very long, it usually needs the time of a couple of days, and it be easy to cause the wave of raw material and Gas Resource
Take.
Invention content
To overcome existing vanadium titano-magnetite furnace compound wind mode to take the deficiencies of longer, cost is higher, the present invention to be solved
Certainly the technical issues of is：A kind of vanadium titano-magnetite blast furnace process is provided and replies immediately wind method soon.
The technical solution adopted by the present invention to solve the technical problems is：
Vanadium titano-magnetite blast furnace process replies immediately wind method soon, by using rational charging system, blowing system, slag making system
It spends and carries out multiple wind with thermal system, specially：
Charging system：Fed using 2~3 ring clothes, and ensure ore outer shroud and outer burnt differential seat angle control 1~
3 °, ore inner ring is with interior burnt differential seat angle control at 5~6 °；
Blowing system：Adjustment 2~8 and the size in the air port of iron mouth angle in 90 °, make its air supply areas diminution 5%~
25%；
Slagging regime：The dual alkalinity of clinker is lowered, lower modulation is 0.01~1.05；
Thermal system：Furnace temperature is controlled, ensure the mass percents of Si and Ti total contents in molten iron 0.30%~
0.60%.
Further, the charging system is finely adjusted according to the blast furnace staying time, as damping down time≤4h, use
Tricyclic cloth feeds, and ore outer shroud is with outer burnt differential seat angle control at 1~2 °；When the damping down time is 4~16h, using three
Ring cloth feeds, and ore outer shroud is with outer burnt differential seat angle control at 2~3 °；As damping down time >=16h, using bicyclic cloth
It feeds, ore outer shroud is with outer burnt differential seat angle control at 2.5~3 °.
Further, the blowing system is finely adjusted according to the blast furnace staying time, as damping down time≤4h, own
It normally blows in air port；When the damping down time is 4~8h, 2~5 air ports are selected, its air supply areas 5%~10% is reduced；When not
When the wind time is 8~16h, 3~8 air ports are selected, its air supply areas 10%~15% is reduced；As damping down time >=16h, choosing
2~5 air ports are selected, its air supply areas 15%~25% is reduced.
Further, the slagging regime is finely adjusted according to the blast furnace staying time, and as damping down time≤4h, clinker
Dual alkalinity lowers 0.01~0.03；When the damping down time is 4~8h, clinker dual alkalinity lowers 0.02~0.05；Work as damping down
When time is 8~16h, clinker dual alkalinity lowers 1.00~1.05；As damping down time >=16h, clinker dual alkalinity is lowered
0.95~1.05.
Further, the thermal system is finely adjusted according to the blast furnace staying time, and as damping down time≤4h, Si and Ti
The mass percent of total content is 0.30%~0.45%；When the damping down time is 4~8h, the quality percentage of Si and Ti total contents
Than 0.35%~0.50%；When the damping down time is 8~16h, the mass percents of Si and Ti total contents 0.40%~
0.55%；As damping down time >=16h, the mass percent of Si and Ti total contents is 0.45%~0.60%.
The beneficial effects of the invention are as follows：It is comprehensive excellent by being carried out to charging system, blowing system, slagging regime and thermal system
Change, improves the contact area of raw material and air, the mobility of wind speed and mixed material, it is extensive to greatly accelerate blast furnace
The multiple speed to situation before damping down, and resource consumption is reduced, provide guarantee for the normal production run of blast furnace.
Specific implementation mode
With reference to embodiment, the present invention is further described.
Vanadium titano-magnetite blast furnace process replies immediately wind method soon, by using rational charging system, blowing system, slag making system
It spends and carries out multiple wind with thermal system, specially：
Charging system：Fed using 2~3 ring clothes, and ensure ore outer shroud and outer burnt differential seat angle control 1~
3 °, ore inner ring is with interior burnt differential seat angle control at 5~6 °；
Blowing system：Adjustment 2~8 and the size in the air port of iron mouth angle in 90 °, make its air supply areas diminution 5%~
25%；
Slagging regime：The dual alkalinity of clinker is lowered, lower modulation is 0.01~1.05；
Thermal system：Furnace temperature is controlled, ensure the mass percents of Si and Ti total contents in molten iron 0.30%~
0.60%.
Current vanadium titano-magnetite blast furnace is fed by the polycyclic distributing of Top of BF mostly, generally has five rings left
The right side, and in the multiple wind stage, since the working of a furnace is poor, if blanking velocity is too fast, material is unfavorable for reacting after fully accumulating, using 2
~3 ring clothes are fed relatively rationally.When being specifically chosen cloth and blanking angle, to demonstrate,prove ore outer shroud and outer Jiao Jiao
For the control of degree difference at 1~3 °, ore inner ring subject to 5~6 °, can be such that material more disperses, with gas in stove with interior burnt differential seat angle control
Body contact is more abundant, to improve reaction efficiency.
When being blown, by reducing the air supply areas with the air port of iron mouth angle in 90 °, can be certain in flow
In the case of improve wind speed, reacted with coal powder injection to accelerate air, can also improve the flow velocity of the CO of generation, improve reaction efficiency.Contracting
Small air port can be realized by the way that the heat resistance concrete circle of circular ring shape is arranged at air port.
Slagging regime suitably lowers dual alkalinity, and the mobility of material can be improved, and with Si and Ti in thermal system
The mass percent of total content is according to controlling furnace temperature, is to cross reaction, generation high-melting-point object in order to avoid Ti occurs in molten iron
TiN and TiC, the mobility of material can equally be improved by reducing high-melting-point object, to accelerate furnace condition recovery.
Since the damping down time length of blast furnace can to a certain extent have an impact multiple wind process, it can be directed to and stop
The wind time is finely adjusted optimization to above-mentioned charging system, blowing system, slagging regime and thermal system, specific to each system control
System requires as follows：
Charging system：As damping down time≤4h, fed using tricyclic cloth, ore outer shroud and outer burnt differential seat angle control
System is at 1~2 °；It when the damping down time is 4~16h, is fed using tricyclic cloth, ore outer shroud is controlled with outer burnt differential seat angle
At 2~3 °；It as damping down time >=16h, is fed using bicyclic cloth, ore outer shroud is with outer burnt differential seat angle control 2.5
~3 °.
Blowing system：As damping down time≤4h, all air ports are normally blown；When the damping down time is 4~8h, 2 are selected
~5 air ports reduce its air supply areas 5%~10%；When the damping down time is 8~16h, 3~8 air ports are selected, it is reduced
Air supply areas 10%~15%；As damping down time >=16h, 2~5 air ports are selected, its air supply areas 15%~25% is reduced.
Slagging regime：As damping down time≤4h, clinker dual alkalinity lowers 0.01~0.03；When the damping down time be 4~
When 8h, clinker dual alkalinity lowers 0.02~0.05；When the damping down time is 8~16h, clinker dual alkalinity downward 1.00~
1.05；As damping down time >=16h, clinker dual alkalinity lowers 0.95~1.05.
Thermal system：As damping down time≤4h, the mass percent of Si and Ti total contents is 0.30%~0.45%；When not
When the wind time is 4~8h, the mass percent of Si and Ti total contents is 0.35%~0.50%；It is 8~16h when the damping down time
When, the mass percent of Si and Ti total contents is 0.40%~0.55%；As damping down time >=16h, Si and Ti total contents
Mass percent is 0.45%~0.60%.
Data above is that inventor obtains according to test of many times and protracted experience termination, with obvious effects in practical applications,
The multiple wind time can be greatly speeded up, can generally be foreshortened to from traditional a couple of days 10~16 hours.It is done by the following examples into one
Walk explanation：
Embodiment one：
Multiple wind, charging system are carried out for the blast furnace of damping down 3h：It is fed using tricyclic cloth, ore outer shroud and outer burnt angle
Difference control is at 1 °, and ore inner ring is with interior burnt differential seat angle control at 5 °；Blowing system：It normally blows in all air ports；Slagging regime：It will
The dual alkalinity of clinker lowers 0.01；Thermal system：The mass percent of Si and Ti total contents is controlled by 0.30% in molten iron.
It is 11 hours the time required to before furnace condition recovery to damping down, if using the multiple wind mode of tradition, needs 26 hours
Embodiment two：
Multiple wind, charging system are carried out for the blast furnace of damping down 12h：It is fed using tricyclic cloth, ore outer shroud and outer Jiao Jiao
The control of degree difference is at 3 °, and ore inner ring is with interior burnt differential seat angle control at 6 °；Blowing system：6 air ports are selected, its air supply areas is reduced
12%；Slagging regime：The dual alkalinity of clinker is lowered 1；Thermal system：The mass percent of Si and Ti total contents is pressed in molten iron
0.50% is controlled.It is 14 hours the time required to before furnace condition recovery to damping down, if using the multiple wind mode of tradition, needs 32 small
When
Embodiment three：
Multiple wind, charging system are carried out for the blast furnace of damping down for 24 hours：It is fed using bicyclic cloth, ore outer shroud and outer Jiao Jiao
The control of degree difference is at 3 °, and ore inner ring is with interior burnt differential seat angle control at 6 °；Blowing system：5 air ports are selected, its air supply areas is reduced
20%；Slagging regime：The dual alkalinity of clinker is lowered 1.05；Thermal system：The mass percent of Si and Ti total contents in molten iron
It is controlled by 0.60%.It is 16 hours the time required to before furnace condition recovery to damping down, if using the multiple wind mode of tradition, needs 60
Hour.
Claims (5)
1. vanadium titano-magnetite blast furnace process replies immediately wind method soon, characterized in that made by using rational charging system, air-supply
Degree, slagging regime and thermal system carry out multiple wind, specially：
Charging system：It is fed using 2~3 ring clothes, and ensures ore outer shroud and outer burnt differential seat angle control at 1~3 °, mine
Stone inner ring is with interior burnt differential seat angle control at 5~6 °；
Blowing system：The size for adjusting 2~8 and the air port of iron mouth angle in 90 ° makes its air supply areas reduce 5%~25%；
Slagging regime：The dual alkalinity of clinker is lowered, lower modulation is 0.01~1.05；
Thermal system：Furnace temperature is controlled, ensures the mass percent of Si and Ti total contents in molten iron 0.30%~0.60%.
2. vanadium titano-magnetite blast furnace process as described in claim 1 replies immediately wind method soon, it is characterized in that：The charging system root
It is finely adjusted according to the blast furnace staying time, as damping down time≤4h, is fed using tricyclic cloth, ore outer shroud and outer Jiao Jiao
Degree difference control is at 1~2 °；When the damping down time is 4~16h, fed using tricyclic cloth, ore outer shroud and outer burnt angle
Difference control is at 2~3 °；It as damping down time >=16h, is fed using bicyclic cloth, ore outer shroud is controlled with outer burnt differential seat angle
At 2.5~3 °.
3. vanadium titano-magnetite blast furnace process as described in claim 1 replies immediately wind method soon, it is characterized in that：The blowing system root
It is finely adjusted according to the blast furnace staying time, as damping down time≤4h, all air ports are normally blown；When the damping down time is 4~8h,
2~5 air ports are selected, its air supply areas 5%~10% is reduced；When the damping down time is 8~16h, 3~8 air ports, contracting are selected
Its small air supply areas 10%~15%；As damping down time >=16h, select 2~5 air ports, reduce its air supply areas 15%~
25%.
4. vanadium titano-magnetite blast furnace process as described in claim 1 replies immediately wind method soon, it is characterized in that：The slagging regime root
It is finely adjusted according to the blast furnace staying time, as damping down time≤4h, clinker dual alkalinity lowers 0.01~0.03；When the damping down time
For 4~8h when, clinker dual alkalinity lower 0.02~0.05；When the damping down time is 8~16h, clinker dual alkalinity is lowered
1.00~1.05；As damping down time >=16h, clinker dual alkalinity lowers 0.95~1.05.
5. vanadium titano-magnetite blast furnace process as described in claim 1 replies immediately wind method soon, it is characterized in that：The thermal system according to
The blast furnace staying time is finely adjusted, as damping down time≤4h, the mass percents of Si and Ti total contents 0.30%~
0.45%；When the damping down time is 4~8h, the mass percent of Si and Ti total contents is 0.35%~0.50%；When damping down
Between be 8~16h when, the mass percent of Si and Ti total contents is 0.40%~0.55%；As damping down time >=16h, Si and
The mass percent of Ti total contents is 0.45%~0.60%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810349797.4A CN108546791B (en) | 2018-04-18 | 2018-04-18 | Method for quickly re-airing vanadium titano-magnetite during blast furnace smelting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810349797.4A CN108546791B (en) | 2018-04-18 | 2018-04-18 | Method for quickly re-airing vanadium titano-magnetite during blast furnace smelting |
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| CN108546791B CN108546791B (en) | 2020-04-28 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174452A (en) * | 2021-04-22 | 2021-07-27 | 玉溪新兴钢铁有限公司 | Method for rapidly achieving yield of medium titanium slag smelted blast furnace after damping down |
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| JPS56119711A (en) * | 1980-02-28 | 1981-09-19 | Kawasaki Steel Corp | Operating method for bellless type blast furnace |
| JPH01234510A (en) * | 1988-03-15 | 1989-09-19 | Sumitomo Metal Ind Ltd | Method for starting reblowing in dead blast furnace |
| KR20030041559A (en) * | 2001-11-20 | 2003-05-27 | 주식회사 포스코 | Method for quick raising temperature of central area of blast furnace |
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| CN104673951A (en) * | 2015-03-20 | 2015-06-03 | 攀钢集团西昌钢钒有限公司 | Blast furnace smelting method by using vanadium-titanium two-phase sintering ore |
| CN107090529A (en) * | 2017-05-27 | 2017-08-25 | 攀钢集团西昌钢钒有限公司 | Production method is quickly reached after a kind of high-titanium type vanadium-titanium magnetite blast furnace staying |
-
2018
- 2018-04-18 CN CN201810349797.4A patent/CN108546791B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56119711A (en) * | 1980-02-28 | 1981-09-19 | Kawasaki Steel Corp | Operating method for bellless type blast furnace |
| JPH01234510A (en) * | 1988-03-15 | 1989-09-19 | Sumitomo Metal Ind Ltd | Method for starting reblowing in dead blast furnace |
| KR20030041559A (en) * | 2001-11-20 | 2003-05-27 | 주식회사 포스코 | Method for quick raising temperature of central area of blast furnace |
| KR20040083637A (en) * | 2003-03-24 | 2004-10-06 | 주식회사 포스코 | Method for filling a blast furnace with charging materials |
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| CN107090529A (en) * | 2017-05-27 | 2017-08-25 | 攀钢集团西昌钢钒有限公司 | Production method is quickly reached after a kind of high-titanium type vanadium-titanium magnetite blast furnace staying |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113174452A (en) * | 2021-04-22 | 2021-07-27 | 玉溪新兴钢铁有限公司 | Method for rapidly achieving yield of medium titanium slag smelted blast furnace after damping down |
| CN113174452B (en) * | 2021-04-22 | 2022-11-01 | 玉溪新兴钢铁有限公司 | Method for rapidly achieving yield of medium titanium slag smelted blast furnace after damping down |
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| CN108546791B (en) | 2020-04-28 |
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