CN102134620A - Blast furnace shaft upper part rapid hot wet method for producing lining - Google Patents
Blast furnace shaft upper part rapid hot wet method for producing lining Download PDFInfo
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- CN102134620A CN102134620A CN 201010510810 CN201010510810A CN102134620A CN 102134620 A CN102134620 A CN 102134620A CN 201010510810 CN201010510810 CN 201010510810 CN 201010510810 A CN201010510810 A CN 201010510810A CN 102134620 A CN102134620 A CN 102134620A
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Abstract
The invention discloses a blast furnace shaft upper part rapid hot wet method for producing a lining. The method comprises the following steps: (1) two days before blowing out, a prepurging measure is adopted, the coal injection ratio is reduced by 30%-40% compared with the normal state, a 300-500mm thick water granulated slag layer is covered on the burden surface; (2) after blowing out, an inspection manhole on the top of the furnace is rapidly opened, an axial flow fan for blasting and an axial flow fan for air exhaust are separately arranged close to the inspection manhole, forced cooling is performed on the blast furnace for 12-14 hours, a tuyere small sleeve arranged at the bottom of the blast furnace is detached, and refractory mortar is used to mason the tuyere; (3) a construction platform is built: two channel beams of which the distance is 800-1200mm are overlapped on the furnace throat steel bricks, two rope ladders are suspended at the middle of each channel beam, the two rope ladders are overlapped at a place close to the burden surface to fix boards; (4) spraying construction is performed on the wall of the furnace on the construction platform built in the step (3); and (5) after the construction, the platform is dismantled and the inspection manhole is sealed. By adopting the wet method, the spraying lining time is reduced to 24 hours.
Description
Technical field
The present invention relates to blast furnace ironmaking furnace wall gunning technology, the quick hot wet method in especially a kind of blast furnace stack top is made the method for lining.
Background technology
The complete stable a crucial factor that plays for the reasonable of blast furnace top charging system and coal gas stream of blast furnace stack top bricking is that can a blast furnace realize one of essential condition of advanced production index.In the production of reality, shaft top is the interior furnace wall of the following 3 meters scopes of throat armour particularly, is generally built by laying bricks or stones by high alumina brick, usually be subjected to washing away of furnace charge, the rapid variation of temperature, the physical chemistry influence time of numerous complicated such as unreasonable operate in the erosion of rising coal gas stream, will form irregular erosion or big area comes off, thereby cause roof material distributing can not reach the anticipation effect, coal gas stream is disorderly, and the heat energy utilization rate reduces, cause the blast furnace energy expenditure to raise, coefficient reduces.
Therefore Steel Plant all pay special attention to for the erosion condition of blast furnace bricking, overhaul processing in case find to have the serious phenomenon of erosion to arrange the time.Domestic common processing mode has two kinds at present.A kind of be blowing out after, build by laying bricks or stones again with the refractory brick of same model, restore to the original state.This method can reach the effect of new blast furnace substantially, but the time of handling also can be long, generally needs 4-5 days, and is very big to the influence of the performance of enterprises.Another sharp method is behind blast furnace stopping, adopts artificial or mechanical system sprays, and the furnace wall attack sites is returned to original shape, reaches repair efficiency.This method is owing to less investment, and the time is short, therefore is widely adopted at present.By studies show that to the spraying of present blast furnace, there are following several point defects in a kind of method in back: 1. safety coefficient is low, because furnace outage time is short, stock column plays pendulum in the stove, be easy to occur avalanche material phenomenon, the security of construction operation is brought very big threat; 2. the time of Chu Liing long, especially building operation platform is key link, domestic present employing lift sinking stage at first need find suitable position in stove, be used to weld the hook of carrying hanging scaffold.No matter be chain block or electronic elevator, this step is absolutely necessary.But consider the erosion condition of furnace shell in the stove, these welds are difficult in the ideal position and find, and consider the problem of intensity, must carry out careful welding, these all bring huge trouble to building, secondly owing to be subjected to the restriction of the size of inspection manhole, hanging scaffold must be after lifting gear installs, on-the-spot splicing group is right, and construction also will be removed general about needs of the time that these process expenses are fallen 24 hours after finishing.The problem consuming time of whole construction course, the data that report is arranged at present are that domestic certain esbablished corporation is to 380m
3The spraying that blast furnace is implemented, 60 hours times spent.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the shortcoming that the safety coefficient that sprays existence behind the blast furnace stopping is low, the treatment time is long, provides a kind of quick cooling, the quick hot wet method in blast furnace stack top simple to operate to make the method for lining.
For solving the problems of the technologies described above, the technical solution used in the present invention is: the quick hot wet method in blast furnace stack top is made the method for lining, it is characterized in that carrying out according to following step:
1. blowing out is preceding 2 days, adopts the prepurging measure, and coal powder injection than reducing 30%-40% from standard state, is covered the thick grain slag of 300-500mm on the charge level;
2. after the blowing out, open the inspection manhole of furnace roof fast, the air blast aerofoil fan is installed at an inspection manhole place therein, the air draft aerofoil fan is installed at another inspection manhole place, blast furnace is forced to cool off 12-14h, unload the tuyere small sleeve that is arranged on the blast furnace bottom simultaneously, and with refractory mortar above-mentioned air port is built sternly, the aerofoil fan of after the cooling air blast being used is removed;
3. build operation platform: 2 channel-section steels that are spaced apart 800-1200mm of overlap joint on throat armour, respectively hang 2 rope ladders at the middle part of above-mentioned 2 channel-section steels, overlap joint, fixing plank between the above-mentioned rope ladder bottom;
4. the furnace wall to shaft top damaged location carries out spraying application on the operation platform of above-mentioned steps in 3.;
5. after construction finishes, carry out platform and remove, blower fan is removed, the sealing inspection manhole.
Above-mentioned technological step 2. in, by forcing cooling 12-14h, high furnace temperature is reduced to 60 ℃, possesses execution conditions after the blowing out; The operation platform that step is built in 3. is simple and easy, practical, needs 30min to finish approximately; Step per hour about the 7-8 ton, can be finished a 600m in 4 hours according to normal spraying rate in 4.
3Step dismounting construction is 5. added in the spraying of blast furnace top furnace wall, and all constructions can be finished in 24h.
Adopt the beneficial effect that technique scheme produced to be: the present invention reduces to about 60 ℃ the temperature of working space by forcing cooling fast, has improved the safety coefficient that the technician constructs; The operation platform of building is simple, practical, has saved the time of whole construction greatly, and the time that whole wet spray is made lining only has 24h altogether, helps reducing the blast furnace staying rate, has shortened the time that blowing out is rested and reorganized greatly, has improved the performance of enterprises.
Description of drawings
Fig. 1 is the operation platform partial cutaway schematic that the present invention builds;
Fig. 2 is Figure 1A-A diagrammatic cross-section.
Embodiment
The present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
1. blowing out is preceding 2 days, adopts the prepurging measure, the coal powder injection ratio is reduced 30%-40% from standard state, thereby improve the consumption of coke, helps improving the active degree of cupola well, helps going out slag iron in the clean stove before the blowing out; Cover the thick grain slag of 300-500mm on the charge level equably,, can effectively suppress upwards diffusion of coal gas in the stove because the ventilation property of grain slag is poor.
2. after the blowing out, open the inspection manhole 2 of furnace roof fast, two large power shaft flow fans 1 are installed, an air blast in stove, an air draft outside stove forces to cool off 12-14h to blast furnace, unload air-supply straight tube and tuyere small sleeve simultaneously, above-mentioned air port is built tight with refractory mortar; In order to ensure the effect of air blast, need to make flexible blowing line, make air quantity directly blow to the charge level center, force cooling.
3. build operation platform: take above the throat armour 4 that is placed on blast furnace by the channel-section steel that inspection manhole 2 is 200mm with two specifications, two channel-section steels 3 be spaced apart 800-1200mm, respectively hang two rope ladders 6 at the middle part of two channel-section steels 3 by means of hook 9 then; Between two rope ladder 6 bottoms on each above-mentioned channel-section steel, respectively overlap the plank 7 of 1500mm * 300mm * 30mm, and will plank be fixed on the rope ladder 6, prevent the cunning of sticking up of plank with iron wire; So easy operation platform is just built and is finished, and whole build process 30min can finish.
It is the Deformed Steel Bars making of 12-14mm that the foot-operated ladder shelves 10 of above-mentioned rope ladder adopt diameter, because Deformed Steel Bars intensity height, hardness is big, and installation is light and handy, and not yielding.
It is to be security consideration fully that the workmen stands on the plank construction, prevents from that furnace charge subsides in the State of Blast Furnace to cause injury to personnel.Plank 7 is that 200mm gets final product apart from the distance of charge level 8, but in case of necessity the workmen also the short period of time is trampled charge level.
4. the workmen carries out spraying application along rope ladder 6 furnace wall 5 to shaft top damaged location to the described plank 7.
The security of construction process is important assurance.It is key to be whether exist burning in the stove, in case produce the space, subsiding of charge level will be taken place.The present invention has taked to unload air-supply straight tube and tuyere small sleeve after the 2. middle blowing out of step, with refractory mortar tight measure is built in the air port, is also continual pitch or the lubricating grease smeared of assurance stopping property simultaneously; But also arrange welding personnel to utilize blasting time tight the gas leakage spot weld of furnace shell.Can guarantee that by this method of evidence repeatedly blast furnace stopped subsiding of charge level in 8 hours later in blowing out, stability is extremely strong.
At present domestic spraying technology relatively is shaped, and the material that is sprayed is heavy spray material CMG-BF, and is thick with the water uniform mixing, and adopting pressure is the pressurized air of 0.4-0.6MPa, and material is sprayed on the furnace wall.Local not too smooth position can simply be handled with scoop, to guarantee the even of circumferential direction.
5. after construction finishes, carry out built and remove, blower fan is removed, the sealing inspection manhole.
To sum up, in the above-mentioned construction technology, step 12-14h cooling time, step platform building time 30min, step spraying application time 4h 4. 3. 2. adds with step dismounting time 5. etc. and is in the same place, be no more than 24h altogether, shorten the time that hot wet method causes greatly, improved the performance of enterprises.
Claims (4)
1. the quick hot wet method in blast furnace stack top is made the method for lining, it is characterized in that carrying out according to following step:
1. blowing out is preceding 2 days, adopts the prepurging measure, and coal powder injection than reducing 30%-40% from standard state, is covered the thick grain slag of 300-500mm on the charge level;
2. after the blowing out, open the inspection manhole (2) of furnace roof fast, the air blast aerofoil fan is installed at an inspection manhole place therein, the air draft aerofoil fan is installed at another inspection manhole place, blast furnace is forced to cool off 12-14h, unload the tuyere small sleeve that is arranged on the blast furnace bottom simultaneously, and above-mentioned air port is built tight with refractory mortar;
3. build operation platform: go up 2 channel-section steels (3) that are spaced apart 800-1200mm of overlap joint at throat armour (4), respectively hang 2 rope ladders (6), overlap joint between the above-mentioned rope ladder bottom, fixing plank (7) in the middle part of above-mentioned 2 channel-section steels;
4. the furnace wall (5) to shaft top damaged location carries out spraying application on the operation platform of above-mentioned steps in 3.;
5. after construction finishes, carry out the dismounting of operation platform and aerofoil fan, the sealing inspection manhole.
2. the quick hot wet method in blast furnace stack according to claim 1 top is made the method for lining, it is characterized in that the aerofoil fan mouth in air blast was provided with flexible blowing line during described step 2..
3. the quick hot wet method in blast furnace stack according to claim 2 top is made the method for lining, it is characterized in that the foot-operated ladder shelves of described rope ladder adopt Deformed Steel Bars to do.
4. the quick hot wet method in blast furnace stack according to claim 3 top is made the method for lining, it is characterized in that plank is 200mm apart from the distance of charge level.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105108103A CN102134620B (en) | 2010-10-19 | 2010-10-19 | Blast furnace shaft upper part rapid heating for producing lining by wet method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010105108103A CN102134620B (en) | 2010-10-19 | 2010-10-19 | Blast furnace shaft upper part rapid heating for producing lining by wet method |
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| CN102134620A true CN102134620A (en) | 2011-07-27 |
| CN102134620B CN102134620B (en) | 2012-05-23 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618677A (en) * | 2012-03-21 | 2012-08-01 | 马钢(集团)控股有限公司 | Method for cleaning materials in large-scale blast furnace in overhaul |
| CN103866062A (en) * | 2012-12-12 | 2014-06-18 | 莱芜市荣华耐火材料有限公司 | Method for automatic wet injection lining making of blast furnace |
| CN113604619A (en) * | 2021-07-23 | 2021-11-05 | 河南华西耐火材料有限公司 | Remote control thermal state wet method jetting lining manufacturing method |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000273510A (en) * | 1999-03-19 | 2000-10-03 | Sumitomo Metal Ind Ltd | Operation of blast furnace at repairing of inner wall of blast furnace |
| KR100629408B1 (en) * | 2005-04-15 | 2006-09-28 | 조선내화 주식회사 | Device for mending inside wall of blast furnace |
| CN101092653A (en) * | 2006-06-19 | 2007-12-26 | 章荣会 | Liner making technique for casting lander of blast furnace with single iron notch, and free from baking casting material for iron notch |
| CN201015760Y (en) * | 2007-03-27 | 2008-02-06 | 王建国 | Hydraulic pressure blast furnace interfacing full-automatic spray repair set |
| JP2008121105A (en) * | 2006-11-10 | 2008-05-29 | China Steel Corp | Method for measuring spraying thickness and rebound quantity of cement on furnace body in blast furnace |
| CN101250598A (en) * | 2008-03-12 | 2008-08-27 | 重庆钢铁(集团)有限责任公司 | Maintaining method for blast furnace |
-
2010
- 2010-10-19 CN CN2010105108103A patent/CN102134620B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000273510A (en) * | 1999-03-19 | 2000-10-03 | Sumitomo Metal Ind Ltd | Operation of blast furnace at repairing of inner wall of blast furnace |
| KR100629408B1 (en) * | 2005-04-15 | 2006-09-28 | 조선내화 주식회사 | Device for mending inside wall of blast furnace |
| CN101092653A (en) * | 2006-06-19 | 2007-12-26 | 章荣会 | Liner making technique for casting lander of blast furnace with single iron notch, and free from baking casting material for iron notch |
| JP2008121105A (en) * | 2006-11-10 | 2008-05-29 | China Steel Corp | Method for measuring spraying thickness and rebound quantity of cement on furnace body in blast furnace |
| CN201015760Y (en) * | 2007-03-27 | 2008-02-06 | 王建国 | Hydraulic pressure blast furnace interfacing full-automatic spray repair set |
| CN101250598A (en) * | 2008-03-12 | 2008-08-27 | 重庆钢铁(集团)有限责任公司 | Maintaining method for blast furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618677A (en) * | 2012-03-21 | 2012-08-01 | 马钢(集团)控股有限公司 | Method for cleaning materials in large-scale blast furnace in overhaul |
| CN103866062A (en) * | 2012-12-12 | 2014-06-18 | 莱芜市荣华耐火材料有限公司 | Method for automatic wet injection lining making of blast furnace |
| CN113604619A (en) * | 2021-07-23 | 2021-11-05 | 河南华西耐火材料有限公司 | Remote control thermal state wet method jetting lining manufacturing method |
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|---|---|
| CN102134620B (en) | 2012-05-23 |
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