CN104789733B - A kind of maintaining method of converter lining - Google Patents
A kind of maintaining method of converter lining Download PDFInfo
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- CN104789733B CN104789733B CN201510141846.1A CN201510141846A CN104789733B CN 104789733 B CN104789733 B CN 104789733B CN 201510141846 A CN201510141846 A CN 201510141846A CN 104789733 B CN104789733 B CN 104789733B
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- converter
- slag
- compressed nitrogen
- liquid slag
- furnace lining
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Abstract
The invention discloses a kind of maintaining method of converter lining, comprise the following steps：1) after converter tapping terminates, a certain amount of liquid slag is retained in converter；2) converter oxygen gun is fallen；3) by oxygen rifle intermittently to liquid slag blowing compressed nitrogen so that liquid slag produces wave outwards to stretch, and slag wave is moved to converter lining, is fully contacted with furnace lining surface so that furnace lining surface dross；4) after blowing compressed nitrogen terminates, oxygen rifle is proposed from converter；5) remaining liquid slag in converter is poured out.The present invention is by oxygen rifle intermittently to liquid slag blowing compressed nitrogen, so that liquid slag produces wave outwards to stretch, slag wave is fully contacted with molten bath furnace lining surface, so that furnace lining surface dross, the Rapid-Repair to furnace lining is realized, so as to substantially reduce the time that molten bath furnace lining is safeguarded, continuous production is improve, other refractory materials are not used simultaneously, so as to greatly reduce production cost.
Description
Technical field
The present invention relates to converter steeling technology field, more particularly, to a kind of maintaining method of converter lining.
Background technology
Converter carries out extremely complex, fierce physical-chemical reaction and mechanical movement in converting process, in stove.Due to
The reasons such as the improper operation in mechanical erosion, high temperature, chemical erosion, peeling, smelting process, it is easy to cause the damage of converter lining
It is bad.
Furnace lining is damaged and unbalanced, wherein, the furnace lining at converter molten pool position damages most serious.To make converter safety and stability suitable
OK, it is to avoid stopped production caused by the damage of local furnace lining is too fast, the regular maintenance of converter should be strengthened, to damaging molten bath portion the most serious
The furnace lining of position is remedied, and is tried one's best equilibrium with reaching furnace lining damaged condition.
Patch block method and spraying method are used the furnace lining maintaining method of molten bath more.Patch block method is using the special big shovel (diameter of patch block
60mm, 8 meters of steel pipes long, one end weldering 25mm × 15mm steel plates are used for putting refractory brick, and the other end welds T-shaped handle) by following
Refractory brick is pushed into appointed part by rolling bearing support using lever principle is artificial；Spraying method is by gunning refractory by spray repair equipment
Spray repair makes gunning refractory be combined closely with furnace lining matrix in attack sites, then high temperature sintering.
Patch block method and spraying method must be operated in the case where converter is in empty stove, after patch block or spray repair, must also
Sintering 30min~60min, this just makes molten bath furnace lining attended operation and the continuous production of steel mill generate implacable lance
Shield, has upset the rhythm of production of the modernization steel mill based on continuous casting.
In addition, no matter patch block method or spraying method are required for the refractory materials such as consumption fettling brick or gunning refractory, increased molten
The cost that pond is safeguarded.
Therefore, how to shorten the time required to converter molten pool furnace lining is safeguarded while it is current this area to reduce refractory consumption rate
The technical problem of technical staff's urgent need to resolve.
The content of the invention
In view of this, it is an object of the invention to provide a kind of maintaining method of converter lining, the present invention can shorten converter and melt
The time required to tank furnace lining is safeguarded, continuous production is improved, and reduce the refractory consumption rate that molten bath furnace lining is safeguarded simultaneously, reduced
Production cost.
To solve above-mentioned technical problem, the technical scheme that the present invention is provided is：
A kind of maintaining method of converter lining, it is characterised in that comprise the following steps：
1) after converter tapping terminates, a certain amount of liquid slag is retained in converter；
2) converter oxygen gun is fallen；
3) by oxygen rifle intermittently to liquid slag blowing compressed nitrogen so that liquid slag produces wave outwards to overflow
Prolong, slag wave is moved to converter lining, be fully contacted with furnace lining surface so that furnace lining surface dross；
4) after blowing compressed nitrogen terminates, oxygen rifle is proposed from converter；
5) remaining liquid slag in converter is poured out.
Preferably, in the step 3) also operated including slag splashing before.
Preferably, in the step 3) go to liquid slag in add be used to change the slag adjusting agent of slag properties.
Preferably, in the step 3) during blowing compressed nitrogen, front and rear grate is expanding the motion model of slag wave
Enclose.Preferably, the step 1) quality of liquid slag that retains in converter is 5t~6t, liquid slag liquid depth be 300mm~
600mm。
Preferably, the step 2) oxygen rifle is fallen to being 1.7m~2.7m with the distance of furnace bottom.
Preferably, the step 3) in compressed nitrogen jetting pressure be 0.7MPa~1.0MPa, the flow of compressed nitrogen
It is 30000m3/ h~33000m3/ h, the time of each blowing compressed nitrogen is 5s~10s.
Preferably, the step 3) in intermittently blowing compressed nitrogen 4 times~6 times.
Preferably, the step 3) in front and rear blowing compressed nitrogen twice interval time be 4s~8s.
Preferably, the step 3) total time for carrying out is 35s~90s.
Compared with prior art, the invention provides a kind of maintaining method of converter lining, the present invention passes through oxygen rifle intermittently
Formula ground is to the liquid slag blowing compressed nitrogen retained in converter so that liquid slag produces wave outwards to stretch, slag wave
Moved to converter lining, be fully contacted with molten bath furnace lining surface so that furnace lining surface dross, realize repairing the furnace lining for damaging
Mend, it is molten so as to substantially reduce without the furnace lining that high temperature sintering, Rapid-Repair are damaged without blowing out without specially emptying converter
The time that tank furnace lining is safeguarded, continuous production is improve, while the present invention is using the furnace lining of dross repair damaged, do not made
Other refractory materials are used, so as to greatly reduce production cost.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the embodiment of the present invention to this hair
It is bright to be clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than whole
Embodiment.Based on the embodiment in the present invention, those of ordinary skill in the art institute on the premise of creative work is not made
The every other embodiment for obtaining, belongs to the scope of protection of the invention.
The invention provides a kind of maintaining method of converter lining, comprise the following steps：
1) after converter tapping terminates, a certain amount of liquid slag is retained in converter；
2) converter oxygen gun is fallen；
3) by oxygen rifle intermittently to liquid slag blowing compressed nitrogen so that liquid slag produces wave outwards to overflow
Prolong, slag wave is moved to converter lining, be fully contacted with furnace lining surface so that furnace lining surface dross；
4) after blowing compressed nitrogen terminates, oxygen rifle is proposed from converter；
5) remaining liquid slag in converter is poured out.
The invention provides a kind of maintaining method of converter lining, the present invention is intermittently retained by oxygen rifle in converter
Liquid slag blowing compressed nitrogen so that liquid slag produce wave outwards stretch, slag wave is moved to converter lining, with
Molten bath furnace lining surface is fully contacted so that furnace lining surface dross, realizes repairing the furnace lining for damaging, and turns without specially emptying
Stove, without blowing out, without the furnace lining that high temperature sintering, Rapid-Repair are damaged, so as to substantially reduce the time that molten bath furnace lining is safeguarded,
Continuous production is improve, while the present invention is using the furnace lining of dross repair damaged, it is no to use other refractory materials, from
And greatly reduce production cost.
In order to ensure the dross effect of molten bath furnace lining, quality and liquid slag of the present invention to liquid slag in liquid converter
It is late at night restricted, it is preferred that the quality of liquid slag be 5t~6t, liquid slag liquid depth be 300mm~600mm.
Likewise, the dross effect in order to ensure molten bath furnace lining, currently preferred by above-mentioned steps 2) in oxygen rifle and stove
The distance at bottom is set as 1.7m~2.7m.In step 3) during batch (-type) blowing compressed nitrogen, the position of oxygen rifle can be with root
Suitably changed according to concrete condition, for example, with the increase of injection number of times, molten bath furnace lining surface gradually dross, the quantity of slag can be by stove
It is decrescence few, it is now constant to ensure the contact area between slag wave and furnace lining, can suitably lower oxygen rifle position.
Used as the power source for promoting liquid slag to make wave motion, it is blown time, jetting pressure and stream to compressed nitrogen
The amount dross effect final to molten bath is critically important.The present invention produces slag wave just with blowing compressed nitrogen, is not splash,
So step 3 of the present invention) in compressed nitrogen jetting pressure and flow it is smaller, preferably 0.7MPa~1.0MPa, compressed nitrogen
The flow of gas is preferably 30000m3/ h~33000m3/ h, the time of each blowing compressed nitrogen is preferably 5s~10s.
The present invention is by oxygen rifle to the liquid slag blowing compressed nitrogen retained in converter so that liquid slag produces wave
Outwards stretch, slag wave is moved to converter lining, be fully contacted with molten bath furnace lining surface so that furnace lining surface dross, quickly
The furnace lining of repair damaged.In view of the kinetic energy that slag wave has is smaller, the impulsive force to molten bath furnace lining is smaller, is only blown once
Compressed nitrogen, the dross effect affirmative of molten bath furnace lining is not ideal enough.Therefore, step 3 of the present invention) in using batch (-type) to liquid stove
Slag blowing compressed nitrogen, forms a wave and connects a movement effects for wave, improves the dross amount of molten bath furnace lining, strengthens dross
With the adhesion of furnace lining matrix, the step 3) in intermittently blowing compressed nitrogen be preferably 4 times~6 times, it is front and rear to spray twice
Interval time of compressed nitrogen is blown for 4s~8s, step 3) total time for carrying out is 35s~90s.
The present invention is by oxygen rifle intermittently to the liquid slag blowing compressed nitrogen retained in converter so that liquid slag
Wave is produced outwards to stretch, slag wave is moved to converter lining, is fully contacted with molten bath furnace lining surface so that furnace lining surface hangs
Slag, the furnace lining that Rapid-Repair is damaged.By the characteristic that wave has in itself, the height of wave is smaller, the extreme sport of wave
Stroke is also smaller, it is impossible to touch the furnace lining on converter top, in order to be carried out to whole converter lining in being operated in full maintenance
Safeguard, improve maintenance efficiency, in one embodiment of the invention, the present invention is in above-mentioned steps 1) also include slag splashing before
Operation.After converter tapping terminates, a certain amount of liquid slag is retained in converter；Then, converter oxygen gun is fallen, according to regular behaviour
Start slag splashing as code；Then, oxygen rifle is adjusted highly, according to the maintaining method that the present invention is provided, by oxygen rifle batch (-type)
Ground is to liquid slag blowing compressed nitrogen so that liquid slag produces wave outwards to stretch, and slag wave is moved to converter lining,
It is fully contacted with furnace lining surface so that furnace lining surface dross.Repairing dimension is carried out to whole converter lining first with slag splashing
Shield, the maintaining method that then present invention is provided as a kind of secondary maintenance method or emphasis maintaining method, to corrode compared with
Serious molten bath position furnace lining carries out secondary maintenance or emphasis is safeguarded.Specific steps and every work of the present invention to slag splashing
Skill parameter is not particularly limited, according to on-site actual situations, using Technology of Slag Splashingfor Furnace Maintenance well known to those skilled in the art.
In convertor steelmaking process, because raw material is different, smelting process is different, target product is different and slag former is not equal
Factor, after causing converter tapping, the property of the slag retained in converter is different, and some slags are not suitable for repairing stove for dross
Lining.Therefore, it is necessary to first judging every property index of slag is before the maintaining method provided using the present invention safeguards furnace lining
The no requirement for being applicable dross fettling, the property index of slag is mainly temperature, fusing point, composition and viscosity etc..If through judging
The requirement of the inapplicable dross fettling of indivedual property indexs of slag, is carrying out above-mentioned steps 3) need to add toward liquid slag before
Enter to change the slag adjusting agent of slag properties.The present invention is not particularly limited to the species of slag adjusting agent, composition and addition etc.,
According to on-site actual situations, using the species of slag adjusting agent well known to those skilled in the art, composition and addition.
By the characteristic that wave has in itself, the height of wave is smaller, and the extreme sport stroke of wave is also smaller, it is impossible to
The furnace lining on converter top is touched, in order to further expand the extreme sport stroke of wave, expansion wave connects with furnace lining surface
Contacting surface is accumulated, in one embodiment of the invention, in the step 3) during blowing compressed nitrogen, front and rear grate is expanding stove
The range of movement of slag wave.
For a further understanding of the present invention, the maintaining method of the converter lining provided the present invention with reference to embodiment enters
Row is described in detail.
Embodiment：
After converter tapping terminates, it is the liquid slag of 5.5t that quality is retained in converter, it is ensured that liquid slag liquid depth is
450mm.Then, converter oxygen gun is fallen, slag splashing is started according to normal operations code.Then, adjustment oxygen rifle height to and stove
The distance at bottom is set as 2.0m.Judge whether the property indexs such as temperature, fusing point, composition and the viscosity of slag are applicable dross fettling
Requirement, if the requirement through judging the inapplicable dross fettling of indivedual property indexs of slag, residue adjustment is added toward liquid slag
Agent is adjusting slag properties.By oxygen rifle intermittently to liquid slag blowing compressed nitrogen, the jetting pressure of compressed nitrogen is
1.0MPa, the flow of compressed nitrogen is 30000m3/ h so that liquid slag produces wave outwards to stretch, and slag wave is to converter
Furnace lining is moved, and is fully contacted with furnace lining surface so that furnace lining surface dross.Batch (-type) is blown 5 times, each blowing compressed nitrogen
Time is 6s, and the interval time of front and rear blowing compressed nitrogen twice is 6s, and first time nitrogen-blow starts to the 5th injection
Time between nitrogen terminates is 54s.During 5 blowing compressed nitrogens, front and rear grate is expanding the fortune of slag wave
Dynamic scope, further expands the extreme sport stroke of wave, expands the contact area of wave and furnace lining surface.Blowing compressed nitrogen
After end, oxygen rifle is proposed from converter, then pour out remaining liquid slag in converter.
A kind of maintaining method of converter lining provided by the present invention is described in detail above.It is used herein
Specific embodiment is set forth to principle of the invention and implementation method, and the explanation of above example is only intended to help and understands
The method of the present invention and its core concept.It should be pointed out that for those skilled in the art, not departing from this
On the premise of inventive principle, some improvement and modification can also be carried out to the present invention, these are improved and modification also falls into the present invention
In scope of the claims.
Claims (8)
1. a kind of maintaining method of converter lining, it is characterised in that comprise the following steps：
1) after converter tapping terminates, a certain amount of liquid slag is retained in converter；
2) converter oxygen gun is fallen；
3) slag splashing operation is carried out；
4) after the completion of slag splashing, by oxygen rifle intermittently to liquid slag blowing compressed nitrogen so that liquid slag is produced
Wave is outwards stretched, and slag wave is moved to converter lining, is fully contacted with furnace lining surface so that furnace lining surface dross；In step
During rapid 4) blowing compressed nitrogen, front and rear grate is expanding the range of movement of slag wave；
5) after blowing compressed nitrogen terminates, oxygen rifle is proposed from converter；
6) remaining liquid slag in converter is poured out.
2. the maintaining method of converter lining according to claim 1, it is characterised in that in the step 3) with step 4) it
Between be used to change the slag adjusting agent of slag properties toward adding in liquid slag.
3. the maintaining method of converter lining according to claim 1, it is characterised in that the step 1) retain in converter
The quality of liquid slag is 5t~6t, and liquid slag liquid depth is 300mm~600mm.
4. the maintaining method of converter lining according to claim 1, it is characterised in that the step 2) fall oxygen rifle to
The distance of furnace bottom is 1.7m~2.7m.
5. the maintaining method of converter lining according to claim 1, it is characterised in that the step 4) in compressed nitrogen
Jetting pressure is 0.7MPa~1.0MPa, and the flow of compressed nitrogen is 30000m3/ h~33000m3/ h, each blowing compressed nitrogen
Time be 5s~10s.
6. the maintaining method of converter lining according to claim 1, it is characterised in that the step 4) in intermittently spray
Blow compressed nitrogen 4 times~6 times.
7. the maintaining method of converter lining according to claim 6, it is characterised in that the step 4) in front and rear spray twice
The interval time for blowing compressed nitrogen is 4s~8s.
8. the maintaining method of converter lining according to claim 7, it is characterised in that the step 4) total time for carrying out
It is 35s~90s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510141846.1A CN104789733B (en) | 2015-03-27 | 2015-03-27 | A kind of maintaining method of converter lining |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510141846.1A CN104789733B (en) | 2015-03-27 | 2015-03-27 | A kind of maintaining method of converter lining |
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| CN104789733A CN104789733A (en) | 2015-07-22 |
| CN104789733B true CN104789733B (en) | 2017-06-23 |
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| CN201510141846.1A Active CN104789733B (en) | 2015-03-27 | 2015-03-27 | A kind of maintaining method of converter lining |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105671242A (en) * | 2016-03-16 | 2016-06-15 | 山东钢铁股份有限公司 | Maintenance method for converter lining |
| CN109811110A (en) * | 2019-04-12 | 2019-05-28 | 山东钢铁股份有限公司 | A kind of accurate slag splashing method of converter |
| CN110317920B (en) * | 2019-07-11 | 2021-03-02 | 山东钢铁集团有限公司 | Maintenance method for furnace bottom of top-bottom combined blown converter |
| CN110592308A (en) * | 2019-10-17 | 2019-12-20 | 山东钢铁集团日照有限公司 | Surging slag splashing furnace protection method for converter |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102534105A (en) * | 2010-12-15 | 2012-07-04 | 鞍钢股份有限公司 | Maintaining method of converter lining |
| CN102234699B (en) * | 2011-04-18 | 2013-01-23 | 西峡县新锦耐化有限责任公司 | Converter slag mending material |
| CN102660658B (en) * | 2012-05-23 | 2014-08-20 | 北京首钢股份有限公司 | Method for curing converter slag |
| CN103194566A (en) * | 2013-03-30 | 2013-07-10 | 马钢(集团)控股有限公司 | Slag splashing protection method |
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