CN106350634A - Method for quickly repairing furnace lining of vanadium extracting converter - Google Patents
Method for quickly repairing furnace lining of vanadium extracting converter Download PDFInfo
- Publication number
- CN106350634A CN106350634A CN201610833874.4A CN201610833874A CN106350634A CN 106350634 A CN106350634 A CN 106350634A CN 201610833874 A CN201610833874 A CN 201610833874A CN 106350634 A CN106350634 A CN 106350634A
- Authority
- CN
- China
- Prior art keywords
- furnace lining
- slag
- repairing
- brick
- furnace
- 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
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/44—Refractory linings
- C21C5/441—Equipment used for making or repairing linings
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a method for quickly repairing the furnace lining of a vanadium extracting converter. The method includes steps of (1), determining the use amount of furnace repairing bricks according to a to-be-repaired repaired part of the furnace lining and then crushing the furnace repairing bricks to obtain small brick fragments; (2), pouring out steel slag after semi-steel is discharged from the vanadium extracting converter and then flatly laying the small brick fragments on the to-be-repaired part of the furnace lining; (3), adding the steel slag into the to-be-repaired part and adjusting the angle of the vanadium extracting converter to allow the steel slag to cover the small brick fragments on the to-be-repaired part; (4), keeping the vanadium extracting converter still, and sintering the small brick fragments by the aid of the high temperature of the steel slag until a tossing state is relatively still so as to complete the repair work of the furnace lining. The method has the advantages that the vanadium extracting converter can be repaired by the aid of the final slag (the steel slag) of the steelmaking converter and the crushed furnace lining bricks, the repairing can be completed in about 30 minutes and the length of the furnace lining can be increased by 400-500mm; shortcomings of existing methods for repairing furnaces can be overcome, the repairing time can be shortened, and the length of the furnace lining can be increased; a furnace repairing effect can be improved, the labor intensity can be relieved, and the furnace repairing cost can be lowered.
Description
Technical field
The invention belongs to metallurgical lining of steel-smelting furnace area of maintenance, especially a kind of method of Rapid-Repair converter extracting vanadium furnace lining.
Background technology
Vanadium has excellent physical property and chemical property, and purposes is quite varied, has the title of metal " vitamin ".Initially should
For iron and steel, by refining tissue and the crystal grain of steel, improve grain coarsening temperature, thus play increase the intensity of steel, toughness and
Wearability.And the application in non-steel field for the vanadium is also more and more extensive, its scope covers Aero-Space, chemistry, battery, face
The various fields such as material, glass, optics, medicine.
Chinese vanadium reserves are 20,550,000 tons (with v2o5Meter), it is primarily present in vanadium titano-magnetite.From stone containing coulsonite
The method of extracting directly vanadium is referred to as water law vanadium extraction, seldom adopts now；Coulsonite will be contained obtain containing vanadium iron by pyrometallurgy
Water, obtains containing vanadium slag oxidized, and then extracts.Now how using the duplex work that vanadium-bearing hot metal converter is adopted with 1 vanadium extraction 2 steel-making
Skill is smelted.Vanadium extraction by converter blowing mainly passes through oxygen supply, and the oxide forming vanadium extracts.Vanadium is the element of easily oxidation, after oxygen supply,
Fe in molten iron is aoxidized in a large number, and si, mn, v and a small amount of c are also simultaneously oxidized.After vanadium oxidation, primary product is with v2o3And v2o5
The most stable.
In actual production, converter extracting vanadium can be gone out due to some positions of the reason furnace lining such as hot metal charging, pyroreaction, chemical erosion
Now different degrees of damage, is at this moment accomplished by furnace lining is repaired.Use the later stage to furnace lining, repairing amount can be continuously increased, repair
Used by benefit, the time also constantly extends, and affects the stable operation of pneumatic steelmaking when serious.Lining repairing is extending furnace lining life, equilibrium
Furnace lining damages, reduces the effective measure of production cost.The normal operation of converter extracting vanadium is to ensure that vanadium slag yield, provides enough half steels
Basis.
Existing method for repairing and mending has: 1) throws and mends: will throw feed supplement and put in stove from fire door, and make the throwing of melting by shake body of heater
Feed supplement spreads over the position of deteriorating of furnace lining.2) semi dry gunning: using gun, gunning refractory is mixed into appropriate moisture, in compression
It is ejected on furnace lining work surface so as to adhesive solidification with certain speed in the presence of air, play the effect of fettling.Spray
Mend layer and can reach 20～30mm, resistance to deteriorate up to 5 stoves.3) wet spraying: the gunning refractory being configured for major ingredient with magnesia, load spray
Mend in tank, after adding water stirring mixing, be reinjected into specified location, spray repair thickness degree can reach 20～30mm, and spray repair once may be used
With using 3 stoves.4) flame gunning: gunning refractory is sent in the spray gun of water-cooled and burns with fuel, oxygen mix, gunning refractory is in spray
It is in heated plastic state or molten condition immediately in the flame of mouth, be ejected into furnace lining deteriorates on face, at once together with lining sintering.
The flame gunning time is short, and furnace lining waste heat supply temperature is higher, and adhesiving effect is good, and service life is longer, typically at 10～20 times；But by
More complicated in Principle And Development of Flame Gunning Technology, at home and abroad adopt at present is less.5) patch block: when lining wear is serious, surface occurs
Will manually patch block, material spray during pit.This method can make furnace lining rise 100～150mm；But patch block fettling can only manually be grasped
Make, high labor intensive, temperature are high, holding time is long.
Content of the invention
The technical problem to be solved in the present invention is to provide a kind of simple to operate, Rapid-Repair converter extracting vanadium furnace lining that effect is good
Method.
For solving above-mentioned technical problem, the technical solution used in the present invention is: method and step is: (1) is according to furnace lining
Repair the consumption that position determines fettling brick, then fettling brick is broken into little fragment of brick；
(2) converter extracting vanadium pours out slag after going out half steel, the repairing position of the furnace lining that then little fragment of brick tiles；
(3) repairing position addition slag, adjustment converter extracting vanadium angle makes slag cover the little fragment of brick repairing position；
(4) keep converter extracting vanadium static, using the little fragment of brick of the high temperature sintering of slag, until seething state geo-stationary, you can complete
Become the patch work of furnace lining.
In step (1) of the present invention, fettling brick is broken into (100～200) × (50～150) × (40～120) mm's
Little fast brick.
In step (3) of the present invention, add slag by the weight of fettling brick and slag than 1:2～3.
In step (4) of the present invention, sintering time is 20～30min.
In step (2) of the present invention, slag feo content 18～21wt%, mgo content are 12～14wt%, tapping temperature
For 1640～1650 DEG C.
Have the beneficial effects that using produced by technique scheme: the present invention use steelmaking converter finishing slag (slag) and
Backup lining brick after broken repairs converter extracting vanadium, repairs used time about 30min, and furnace lining can be made to increase by 400～500mm；Improve existing
The deficiency of fettling method, shortens repairing and uses the time, improves furnace lining and increases；And improve fettling effect, alleviate work
Intensity, reduces fettling cost.
Specific embodiment
The method of this Rapid-Repair converter extracting vanadium furnace lining is applied to the repairing in the big face of converter extracting vanadium furnace lining, and selection converter is refined
Steel finishing slag, smash after fettling brick pass through sintering and complete the repairing of furnace lining；Using following processing steps:
(1) range estimation furnace lining occurs uneven and is recessed substantially, sees whether to need to repair big face；Repairing according to converter extracting vanadium furnace lining
The concrete condition at position, determines the consumption needing fettling brick.
(2) fettling brick is broken into the little fragment of brick of (100～200) × (50～150) × (40～120) mm size, loads
Steel scrap bucket is stand-by.
(3) converter extracting vanadium blowing complete, go out half steel after pour out slag, empty clean；Slag control requires feo content in slag
18～21wt%, mgo content 12～14wt%, tapping temperature requires 1640～1650 DEG C；Slag to tap after from tapping hole deslagging,
Guarantee in slag, there is no remaining molten steel, allow more sticky slag pour into as far as possible and standby in ferrum bag (in ferrum bag, require clean iron-free
Water).
(4) according to the position repairing position, converter is shaken to 60～75 ° (concrete angle, determine according to the observation and adjust),
By steel scrap bucket, the fettling brick being broken into little fragment of brick is added, make fettling brick be laid in repairing position as far as possible.
(5) repairing the slag that position adds step (3) to pour out, slag addition presses fettling brick: slag=1:2～3(weight
Amount) calculate；Adjustment converter extracting vanadium angle is it is ensured that fettling brick is completely covered by slag repeatedly；Wherein it is possible to by observing in slag
Seethe position judgment fettling brick position.
(6), after the intact covering fettling brick of slag, keep converter extracting vanadium static, using the high temperature sintering fettling brick of slag；
Treat in slag, to seethe state geo-stationary, and scoriform is in semi plastic, can substantially be judged as that sintering completes；Optimal sintering time is 20
～30min.
(7) after sintering, converter is shaken to 0 °, lower rifle splashes slag 60～180s, and flow, normally to splash slag as reference, can suitably add
Enter nut coke adjustment oxidisability, to solidify fettling effect.
With reference to specific embodiment, the present invention is further detailed explanation.
Embodiment 1: the concrete technology of the method for this Rapid-Repair converter extracting vanadium furnace lining is as described below.
Converter extracting vanadium furnace life 7686 stove, observing the big face of furnace lining has obvious depression, and calibrator measures lining thickness 600mm.
According to the concrete condition repairing position, prepare fettling brick 1 (3 tons), fettling brick is smashed into (100～200) × (50～150)
The little fragment of brick of × (40～120) mm size, loads steel scrap bucket stand-by.Steelmaking converter semisteel smelting ss400, adds Calx 4151.7
Ton, 3681.3 tons of dolomite, 1691.7 tons of unprocessed dolomite, blowing oxygen quantity 6294m3, 1641.7 DEG C of tapping temperature；Slag (slag) sample
Middle feo:18.6wt%, mgo:13.2wt%.After tapping hole is poured out, converter extracting vanadium shakes to 67 ° slag, and it is broken good to be added with steel scrap bucket
3 tons of fettling bricks be laid in repairing position, add 7.5 tons of slag；Repeatedly adjust stove angle, make the slag will be complete for fettling brick
Cover.Holding converter extracting vanadium is static to start to sinter, and observes in stove and seethe state geo-stationary in slag during sintering 25min, and scoriform
In semi plastic, then terminate.Under furnace lifting after sintering, rifle splashes slag 100s, and this lining repairing terminates.After this repairing, carry
The furnace lining vanadium extraction of vanadium converter employs 84 stoves, just need to repair again.
Embodiment 2: the concrete technology of the method for this Rapid-Repair converter extracting vanadium furnace lining is as described below.
Converter extracting vanadium furnace life 7771 stove, observing the big face of furnace lining has obvious depression, and calibrator measures lining thickness 500mm.
According to the concrete condition repairing position, prepare fettling brick 2 (5 tons), fettling brick is smashed into (100～200) × (50～150)
The little fragment of brick of × (40～120) mm size, loads steel scrap bucket stand-by.Steelmaking converter semisteel smelting ss400, adds Calx 3987.7
Ton, 4231.8 tons of dolomite, 1712.4 tons of unprocessed dolomite, blowing oxygen quantity 6425m3, 1647.8 DEG C of tapping temperature；Slag (slag) sample
Middle feo:19.2wt%, mgo:13.8wt%.After tapping hole is poured out, converter extracting vanadium shakes to 71 ° slag, and it is broken good to be added with steel scrap bucket
5 tons of fettling bricks be laid in repairing position, add 15 tons of slag；Repeatedly adjust stove angle, make the slag will be complete for fettling brick
Cover.Holding converter extracting vanadium is static to start to sinter, and observes in stove and seethe state geo-stationary in slag during sintering 27min, and scoriform
In semi plastic, then terminate.Under furnace lifting after sintering, rifle splashes slag 180s, and this lining repairing terminates.After this repairing, carry
The furnace lining vanadium extraction of vanadium converter employs 80 stoves, just need to repair again.
Embodiment 3: the concrete technology of the method for this Rapid-Repair converter extracting vanadium furnace lining is as described below.
Converter extracting vanadium furnace life 7835 stove, observing the big face of furnace lining has obvious depression, and calibrator measures lining thickness 490mm.
According to the concrete condition repairing position, prepare fettling brick 2 (5 tons), fettling brick is smashed into (100～200) × (50～150)
The little fragment of brick of × (40～120) mm size, loads steel scrap bucket stand-by.Steelmaking converter semisteel smelting ss400, tapping temperature 1650
DEG C, feo:20.4wt%, mgo:12.0wt% in slag (slag) sample.After tapping hole is poured out, converter extracting vanadium shakes to 75 ° slag,
Add broken 5 tons of good fettling bricks to be laid in repairing position with steel scrap bucket, add 13 tons of slag；Repeatedly adjust stove angle, make
Fettling brick is completely covered by slag.Holding converter extracting vanadium is static to start to sinter, and observes in stove and seethe state in slag during sintering 30min
Geo-stationary, and scoriform is in semi plastic, then terminate.Under furnace lifting after sintering, rifle splashes slag 100s, and this lining repairing terminates.Warp
After crossing this repairing, the furnace lining vanadium extraction of converter extracting vanadium employs 81 stoves, just need to repair again.
Embodiment 4: the concrete technology of the method for this Rapid-Repair converter extracting vanadium furnace lining is as described below.
Converter extracting vanadium furnace life 7593 stove, observing the big face of furnace lining has obvious depression, and calibrator measures lining thickness 570mm.
According to repair position concrete condition, prepare 3.8 tons of fettling brick, by fettling brick smash into (100～200) × (50～150) ×
The little fragment of brick of (40～120) mm size, loads steel scrap bucket stand-by.Steelmaking converter semisteel smelting ss400,1640 DEG C of tapping temperature,
Feo:18.0wt%, mgo:12.7wt% in slag (slag) sample.After tapping hole is poured out, converter extracting vanadium shakes to 65 ° slag, with giving up
Steel bucket adds broken 3.8 tons of good fettling bricks to be laid in repairing position, adds 7.6 tons of slag；Repeatedly adjust stove angle, make stove
Fettling brick is completely covered by slag.Holding converter extracting vanadium is static to start to sinter, and observes in stove and seethe state phase in slag during sintering 20min
To static, and scoriform is in semi plastic, then terminate.Under furnace lifting after sintering, rifle splashes slag 120s, and this lining repairing terminates.Through
After this is repaired, the furnace lining vanadium extraction of converter extracting vanadium employs 79 stoves, just need to repair again.
Embodiment 5: the concrete technology of the method for this Rapid-Repair converter extracting vanadium furnace lining is as described below.
Converter extracting vanadium furnace life 7712 stove, observing the big face of furnace lining has obvious depression, and calibrator measures lining thickness 540mm.
According to the concrete condition repairing position, prepare 4 tons of fettling brick, fettling brick is smashed into (100～200) × (50～150) × (40
～120) the little fragment of brick of mm size, loads steel scrap bucket stand-by.Steelmaking converter semisteel smelting ss400,1644.3 DEG C of tapping temperature, stove
Feo:21.0wt%, mgo:14.0wt% in slag (slag) sample.After tapping hole is poured out, converter extracting vanadium shakes to 60 ° slag, uses steel scrap
Bucket adds broken 4 tons of good fettling bricks to be laid in repairing position, adds 10 tons of slag；Repeatedly adjust stove angle, so that slag is incited somebody to action
Fettling brick is completely covered.Holding converter extracting vanadium is static to start to sinter, and seethes state relatively quiet in slag in observation stove during sintering 22min
Stop, and scoriform is in semi plastic, then terminate.Under furnace lifting after sintering, rifle splashes slag 60s, and this lining repairing terminates.Through this
After repairing, the furnace lining vanadium extraction of converter extracting vanadium employs 83 stoves, just need to repair again.
Claims (5)
1. a kind of method of Rapid-Repair converter extracting vanadium furnace lining is it is characterised in that its method and step is: (1) repairing according to furnace lining
Mend the consumption that position determines fettling brick, then fettling brick is broken into little fragment of brick；
(2) converter extracting vanadium pours out slag after going out half steel, the repairing position of the furnace lining that then little fragment of brick tiles；
(3) repairing position addition slag, adjustment converter extracting vanadium angle makes slag cover the little fragment of brick repairing position；
(4) keep converter extracting vanadium static, using the little fragment of brick of the high temperature sintering of slag, until seething state geo-stationary, you can complete
Become the patch work of furnace lining.
2. Rapid-Repair converter extracting vanadium furnace lining according to claim 1 method it is characterised in that: in described step (1),
Fettling brick is broken into the little fast brick of (100～200) × (50～150) × (40～120) mm.
3. Rapid-Repair converter extracting vanadium furnace lining according to claim 1 method it is characterised in that: in described step (3),
Add slag by the weight of fettling brick and slag than 1:2～3.
4. Rapid-Repair converter extracting vanadium furnace lining according to claim 1 method it is characterised in that: in described step (4),
Sintering time is 20～30min.
5. the Rapid-Repair converter extracting vanadium furnace lining according to Claims 1 to 4 any one method it is characterised in that: institute
State in step (2), slag feo content 18～21wt%, mgo content are 12～14wt%, tapping temperature is 1640～1650 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610833874.4A CN106350634A (en) | 2016-09-20 | 2016-09-20 | Method for quickly repairing furnace lining of vanadium extracting converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610833874.4A CN106350634A (en) | 2016-09-20 | 2016-09-20 | Method for quickly repairing furnace lining of vanadium extracting converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106350634A true CN106350634A (en) | 2017-01-25 |
Family
ID=57858535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610833874.4A Pending CN106350634A (en) | 2016-09-20 | 2016-09-20 | Method for quickly repairing furnace lining of vanadium extracting converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106350634A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034787A (en) * | 2017-11-17 | 2018-05-15 | 河钢股份有限公司承德分公司 | A kind of method using magnetic separation slag iron to half steel steelmaking converter furnace retaining |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104673966A (en) * | 2015-01-22 | 2015-06-03 | 河北钢铁股份有限公司承德分公司 | Method for rapidly maintaining converter lining |
-
2016
- 2016-09-20 CN CN201610833874.4A patent/CN106350634A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104673966A (en) * | 2015-01-22 | 2015-06-03 | 河北钢铁股份有限公司承德分公司 | Method for rapidly maintaining converter lining |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108034787A (en) * | 2017-11-17 | 2018-05-15 | 河钢股份有限公司承德分公司 | A kind of method using magnetic separation slag iron to half steel steelmaking converter furnace retaining |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105671237B (en) | A kind of inexpensive slag making dephosphorization technology of converter smelting high phosphorus hot metal | |
| CN105525055B (en) | A kind of control method of converter less-slag melting carbon period splash | |
| CN108660282A (en) | A kind of converter deslagging face furnace lining Rapid Maintenance Method | |
| CN104673966A (en) | Method for rapidly maintaining converter lining | |
| CN106191370B (en) | A kind of maintaining method of converter lining | |
| CN104032095B (en) | A kind of method of liquid steel dephosphorization agent and liquid steel dephosphorization | |
| CN104673960B (en) | A kind of method of splashing slag in converter | |
| CN106566909A (en) | Pig iron fettling process for converter | |
| CN104032066A (en) | Process for maintaining converter lining by combining metal material with heat-state furnace slag | |
| CN103014224A (en) | Splashed slag furnace protection method for vanadium extraction converter | |
| CN108728603A (en) | A kind of method of quick fettling | |
| CN109182643A (en) | A kind of method of converter finishing slag repairing tapping face furnace lining | |
| CN110643778A (en) | Method for smelting high-phosphorus steel by converter | |
| CN109266807A (en) | A kind of big flow bottom blowing splashes slag and splashes furnace retaining technique in conjunction with slag phase with top blast | |
| CN110643780A (en) | Converter bottom repairing method | |
| CN107557521A (en) | A kind of slag compensating method for improving converter bottom thickness | |
| CN107287382A (en) | A kind of method of remained converter slag slag removing and furnace protecting | |
| CN107365886B (en) | A kind of method of converter high temperature dephosphorization | |
| CN106350634A (en) | Method for quickly repairing furnace lining of vanadium extracting converter | |
| CN106995866A (en) | A kind of low-cost high-efficiency converter fettling technique | |
| CN104060025A (en) | Comprehensive furnace protecting method for steelmaking convertor furnace | |
| CN101921887B (en) | Maintenance method of blast furnace liner | |
| CN102978345A (en) | Low-chrome refractory material RH refining furnace and building method thereof | |
| CN102344984A (en) | Slag remaining method for semisteel smelting under dry dedusting condition | |
| CN104073589B (en) | The method that the furnace bottom of a kind of semi-steel making combined blown converter is safeguarded |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170125 |
|
| WD01 | Invention patent application deemed withdrawn after publication |