CN109112242A - Blast-furnace tuyere fast sealing separates method and device - Google Patents
Blast-furnace tuyere fast sealing separates method and device Download PDFInfo
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- CN109112242A CN109112242A CN201710496449.5A CN201710496449A CN109112242A CN 109112242 A CN109112242 A CN 109112242A CN 201710496449 A CN201710496449 A CN 201710496449A CN 109112242 A CN109112242 A CN 109112242A
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- blast
- furnace tuyere
- furnace
- air port
- brittle
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Classifications
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
- C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/04—Blast furnaces with special refractories
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/38—Non-oxide ceramic constituents or additives
- C04B2235/3817—Carbides
- C04B2235/3826—Silicon carbides
Abstract
The present invention provides a kind of blast-furnace tuyeres to seal partition method and device, wherein is included in the step of one piece of brittle baffle is arranged in blast-furnace tuyere front end, the brittle baffle and blast-furnace tuyere inner wall joint are equipped with the insert seal item of metal material；By mass percentage, the brittle baffle after the mixing of following material by suppressing: white alundum powder 78-70%, silicon carbide 15-10%, aluminium oxide 12-8%, cement 3-2.5%, water-reducing agent 0.5-0.2%.After being the brittle sheet being especially formulated for ambiguity material improvement used in the prior art, solve because block up mud it is of low quality cause the uncontrolled burning of coke inside blast furnace and because disclose air port it is of low quality caused by blast furnace blow to be obstructed and influence the long standing difficulty of blast fumance, the labor intensity for significantly reducing site operation personnel, improves work quality.
Description
Technical field
The present invention relates in blast furnace staying air supply process, the processing method and dress of stifled air port/disclose air port fast sealing partition
It sets.
Background technique
1250 DEG C of hot winds of hot-blast stove production, by a series of air supply devices such as bustle pipe, belly pipe, air port, finally
It is sent into furnace and carries out blast furnace air, provide oxygen-enriched, heat and kinetic energy for blast furnace process.Blast furnace is stopped surely refers to blast furnace in one section of production
After time, since equipment needs periodic maintenance, it is necessary to blowability be stopped, stop blast furnace chemistry and smelt, then begin in height
Under furnace normal pressure halt production situation, need to include that the equipment such as the bushing to periodical management, air port, belly pipe and packing are replaced
Deng, it is a variety of it is different, for when overhaul of the equipments work not etc., we term it " blast furnace stayings ".During damping down, confirmation air port fire
Flame falls to take out, and negative pressure is formed in furnace, starts stifled air port operation.Purpose is the thorough interactive contact blocked in State of Blast Furnace with atmosphere, with
It prevents in furnace coke because of atmosphere seals in oxygen-containing burning, causes top temperature to increase, constantly generate new coal gas, furnace roof is made to determine to stop
Fortification can not be normally carried out.And for cause hot reserve to lose because of meeting combustion of coke of leaking out, the difficulty that blast furnace air-supply restores
Degree and risk will greatly increase.If reply is improper, easily initiation cupola well is cool greatly, or even will appear the pernicious thing of gobbed up
Part.Equally, at high-temperature region (soft melt zone) hereinafter, ore is all in a liquid state, coke is unique solid-state, is supported by up to tens of
The skeleton of rice stock column will make coke skeleton fragile once leading to combustion of coke of leaking out because air port is not closed effectively in damping down
Deformation influences the stabilization of the working of a furnace after air-supply.Damping down fortification, which are fully completed, will do air-supply preparation, including disclose air port, and after air-supply
Check whether all air ports of confirmation air-supply all disclose out, it is therefore an objective to keep practical vent area consistent with the vent area of requirement,
Guarantee that blast furnace is smoothly blown.
Therefore, it blocks up air port and discloses air port and not and in producing occupy very important meaning surely in blast furnace, be to guarantee fixed stop
Can extensive fortification can blast furnace smoothly restore up to the key point produced on schedule, after safety completion, and guarantee air-supply.
In the prior art, blast furnace blocks up air port and discloses the processing method in air port substantially according to following way:
Stifled air port carries out after blast furnace staying catches up with coal gas and furnace roof to light a fire.After operative employee opens the big lid in air port, stand
On tuyere platform, about 10 kilograms or so of " TC " fire clay is pushed into thin by " the stifled rake " for being about 3 meters made using galvanized iron pipe
Long blow-through pipeline, go directly inlet front end furnace in coke column, it is therefore an objective to " TC " indefinite form fire clay is completely covered on air port
Front end makes to separate completely in furnace with the atmosphere outside furnace, hundreds of tonnes in furnace of coke is made to keep one in the state of no oxygen
Fixed temperature cannot burn away again and generate coal gas.For example, the blast-furnace tuyere base of Baosteel, be in short-term originally all at 40 at present
In, hundreds of kilograms of fire clay is sent into long and narrow belly pipe and ensures to be fully sealed, is one time-consuming and laborious and hold very much
Easy amiss operation.General each blast furnace staying, which blocks up air port, will set out more than ten veteran operative employees.
And air port is disclosed after blast furnace completes damping down fortification, will carry out air-supply puts into production, at this time, it may be necessary to get lodged in when by damping down
The fire clay of 40 inlet front ends is thoroughly disclosed out, and is blown convenient for subsequent blast furnace.To ensure the air-supply face after blast furnace air-supply is gone into operation
Long-pending and coal powder injection, it is necessary to disclose out the fire clay sealed completely.And actually fire clay has been sintered at a high temperature of tens hours
At hard solid, firmly it is bonded in air port contained in the formula of itself with sticking substance, and after making sintering
On wall.In about 3 meters of front of distance, operative employee uses long drill rod tip, and the fire clay for being difficult to be adhered to air port inner wall is thorough
It discloses clean.Cause to blow each time and discloses air port and require that the labour of two more than ten people of teams and groups is concentrated to assault.The prior art
Aforesaid operations method usually will appear every time because condition limit, cannot reach and disclose out completely, and then be unable to satisfy air-supply
It is required that.
It is above-mentioned in the prior art, stifled air port and disclose air port and there are problems that the following aspects:
First is that " TC " fire clay usage amount of sealing is big, more than ten kilograms are needed every time, completely by Manual-pushing, is operated
Come laborious；
Second is that " TC " indefinite form fire clay becomes hard after ten a few houres high temperature sinterings, also needed in disclosing open procedure
A large amount of manpower；
Third is that the intrinsic stickum of " TC " indefinite form fire clay sticks in air port inner wall, it is difficult to completely remove, influence height
Furnace air supply areas；
Fourth is that the stifled shale amount caused by because of operating difficulties declines, often cause to do over again because that coke cannot be fully sealed,
More seriously do over again not in time and caused by furnace coke burning generate coal gas, so that furnace roof construction personnel's personal safety is faced prestige
It coerces (having similar case in the past).
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of labor intensity that can mitigate site operation personnel significantly,
Work quality is improved, all higher blast-furnace tuyere of safety, rapidity, convenience and reliability seals partition method.
Its technical problem to be solved can be implemented by the following technical programs.
A kind of blast-furnace tuyere sealing partition method, is included in the step of one piece of brittle baffle is arranged in blast-furnace tuyere front end, institute
It states brittle baffle and blast-furnace tuyere inner wall joint is equipped with the insert seal item of metal material；By mass percentage, described crisp
Property baffle by following material mixing after suppress:
White alundum powder 78-70%, silicon carbide 15-10%, aluminium oxide 12-8%, cement 3-2.5%, water-reducing agent 0.5-
0.2%.
Further include disclosing top through external force as the further improvement of the technical program, is muti-piece by the brittle baffle fragmentation
With the step of restoring blast-furnace tuyere air-supply.
Also as the further improvement of the technical program, when compacting, the brittle baffle surface is also formed in intersecting row
The frangibility impression of column.
Also as the further improvement of the technical program, the surface of the brittle baffle towards blast-furnace tuyere open-position-side is equipped with
Facilitate the pedestal or connector for connecting the external body of rod, to keep the brittle baffle to be smoothly pushed to both positioning of blast-furnace tuyere
It sets.
As one of the preferred embodiment of the present invention, the brittle baffle with a thickness of 20mm.
Also it is used as the preferred embodiment of the present invention, the frangibility impression assumes diamond in shape, depth of cup 1mm.
Another technical problem to be solved by this invention is to provide a kind of blast-furnace tuyere sealing partition apparatus, for placing
In blast-furnace tuyere, feature is, in disk-shaped, the diameter of plectane and the internal diameter of blast-furnace tuyere are adapted the device matrix, described
Metal o-ring is embedded on the cylindrical surface of plectane；One side surface of described matrix is equipped with an attachment connecting interface；By quality hundred
It is suppressed after dividing ratio, the brittle baffle to be mixed by following material:
White alundum powder 78-70%, silicon carbide 15-10%, aluminium oxide 12-8%, cement 3-2.5%, water-reducing agent 0.5-
0.2%；
Described matrix surface is additionally provided with frangibility impression.
As the preferred embodiment of the present invention, the attachment connecting interface is rotary bayonet.
As another preferred embodiment of the invention, the frangibility impression assumes diamond in shape, depth of cup 1mm；The circle
Plate with a thickness of 20mm.
Blast-furnace tuyere sealing partition method and device by adopting the above technical scheme, by ambiguity used in the prior art
After material improvement is the brittle sheet being especially formulated, thoroughly overturn that mud is blocked up in original air port and that discloses air port uses Work tool and auxiliary material
And mode of operation, it solves because stifled mud is of low quality, causes the uncontrolled burning of coke inside blast furnace, and because disclosing air port quality
Not high caused blast furnace air-supply is obstructed, and the long standing difficulty of blast fumance is influenced, and meets the technique requirement that blast furnace stops surely and blows,
The labor intensity for significantly reducing site operation personnel, improves work quality.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of sealing device of the present invention, and wherein Fig. 1 a is side view, and Fig. 1 b is front view；
Fig. 2 is scheme of installation of the sealing device of the present invention in blast-furnace tuyere；
In figure, component 1 is metal barre, and component 2 is sealing ring, and component 3 is grid groove, and component 4 is refractory material sheet
Body；Component 5 is installation loop bar, and component 6 is air port.
Specific embodiment
A specific embodiment of the invention is described in further detail with reference to the accompanying drawing.
In conjunction with shown in attached Fig. 1 and 2, the present invention is directed to the deficiency in order to eliminate prior art, main use such as is divided into
Meter.
It uses refractory aggregate 4 made of compacting for the main component of the device as fire resisting, forms one in main body
A brittle sheet in the form of annular discs is provided with sealing ring 2 on its circumferencial direction, the grid groove 3 of diamond shape has been suppressed on ontology,
Metal barre 1 is provided in the side of ontology.Metal barre 1 connects overhanging installation loop bar 5, under the push of installation loop bar 5,
Refractory aggregate 4 and its appurtenances are pushed to the setting position in air port 6, for sealing and separating.Its main performance is special
Point and specific design details are as follows:
1, mitigate the own wt of sealing device significantly.
It is small and exquisite and reliable using sealing device made of special formulation, before being delivered to 3 meters of remote air ports with manpower
End.The weight of new equipment only has 1/10th of original " TC " fire clay usage amount.It can be grasped in this way to avoid mitigating during installation
The labor intensity of workmanship, to improve operating accuracy.
2, new sealing device must be susceptible to be crushed during disclosing air port.
Become hard after ten a few houres high temperature sinterings for " TC " indefinite form fire clay, is needed in disclosing open procedure a large amount of
The problem of manpower, new device will should be easy to abolish in strong and reliable situation.By the end face of new sealing device in design
Gridding, the longitude and latitude groove of such as blocky chocolate, convenient for fracture (design of the grid groove 3 in such as figure).Meanwhile in formula
Hard but easy to break ingredient is added, the thickness of new equipment can be substantially reduced, to be easy to break.Specific material prescription (presses quality
Percentage)；
White alundum powder 78-70%, silicon carbide 15-10%, aluminium oxide 12-8%, cement 3-2.5%, water-reducing agent 0.5-
0.2%；The following table 1 is two specific lists of ingredients.
Table 1: list of ingredients
| Material % | White alundum powder | Silicon carbide | Aluminium oxide | Cement | Water-reducing agent |
| 1 | 78 | 15 | 12 | 3 | 0.5 |
| 2 | 70 | 10 | 8 | 2.5 | 0.2 |
Had by the refractory aggregate 4 of the repressed formation of material of above-mentioned material configuration and is had stable high-temperature performance, thermal insulation
It can good, the high feature of crushing efficiency.
3, new sealing device and air port junction should be close but cannot thorough adhesion.
The selection ingredient of the device also contemplates former " TC " indefinite form fire clay and sticks in air port inner wall, it is difficult to completely remove
The problem of.In consideration of it, using insert seal item (setting of the sealing ring 2 i.e. in figure) in new equipment outside diameter hoop direction, both
It combines closely with air port internal diameter, and does not generate adhesion, convenient for integrally being removed when disclosing air port, do not end up on the inner wall of air port, accord with
Close the technique requirement of blast furnace air-supply.
4, it is once completed when the operation of new sealing device, does not stay hidden danger.
To avoid stifled mud unstable quality, new equipment design size is accurate, with the complete gluing, sealing of air port internal diameter, does not generate
It does over again accident.The specific implementation step and reason of the technical program institute providing method are as follows:
1, due to not ready-made, the high temperature resistant of suitable blast-furnace tuyere working environment, breakable device production formula, because
This is repeatedly making repeated attempts after multiple formulations, determines the material prescription for finally meeting design requirement (referring to providing in the text of front
Ingredient)；
2, equally under the working environment of air port, the material and form of selected sealing strip also pass through multiple consideration, make it
Not only it was fully sealed, but also cannot be with air port adhesion, it will also be convenient for removal.After testing tens of kinds of sealing strips, final choice metal
The sealing strip of material, fullys meet design requirement；
3, meet in terms of the tightness and high temperature resistant after technique requires, consider operation difficulty during disclosing air port, because
The device is made into rhombus net in end face and formatted by this, and through many experiments, under the effect of external force, can realize easily will be new close
Seal apparatus is thoroughly crushed to 8,9 pieces (such as grid impression fragmentations by diamond shape in Fig. 1), at this moment can no longer use the prior art
In need like that two operative employee's Reusability sledgehammers hammer method；
It 4, is the long and narrow pipeline of belly pipe+air port composition convenient for new equipment to be sent into 3 meters long, it is same in the reverse side of new equipment
Step is implanted into a section metal barre 1, only need to be by another supporting tool in use --- and the stifled multi-functional dedicated loop bar in air port is covered in metal
On barre 1, installing is bayonet connection between loop bar and this sealing device, and when installation, installation loop bar 5 is inserted into metal barre 1, inverse
Hour hands rotation can lock, and sealing device is sent to installation site, rotate clockwise installation loop bar and pull can be with outward
Sealing device disengages；
5, the selection of new equipment comprehensively considers high temperature resistant, shock strength and the light job requirements for being easy for workers to delivering,
By the adjustment of formula, separating new sealing, combination unit is small and exquisite frivolous, and only the thickness of 20mm, entire weight only have 800g
Left and right；
6, through calculating, air port overall length 693.8mm, ventilating duct overall length 627.5mm, front end minimum diameter 160mm in air port, after
Maximum gauge 185mm is held, disc is in streamline transition change form between channel.New sealing partition combination unit is strictly by this rule
Lattice production, precision greatly improve, and the compactness between the air duct of air port is good, disposable to complete the external blocking in air port, work effect
Rate improves, and safety is guaranteed by blast furnace construction personnel.
To reach the blast furnace technologies purpose such as quick, convenient, safe and reliable, the present invention using following safety operation main points and
Technical solution is implemented:
1, it is formed by a firing in strict accordance with the selection formula determined after test, production precision presses the tolerance of drawings marked in attachment
No more than ± 2mm.The fitting of embedded metal sealing ring is close, cannot there is protuberance and disconnection.Network depth 1mm, grid lines
It interacts and runs through completely.
2, pay attention to obtaining the accurate information that air port is cut off the water supply before practical operation, avoid facing the air port coke that air port may cause directly
Splash injury accident.
3, multi-functional dedicated loop bar is used in operation, is covered on partition combination unit metal barre, is gently sent to air port
End does not use brute-force.
4, operator pays attention to surrounding working environment in operation, especially pays close attention to the erect-position of other staff, avoids
Multi-functional dedicated other staff of loop bar scraping collision damage.
5, stringent blast furnace is blown program in the operation for disclosing air port, and being connected to that furnace superintendent discloses after the job instruction in air port can be into
Row.
6, it discloses after blowing in mouth by blast furnace II and is that professional confirms whether air port has the insertion condition of coal rifle, and by furnace
Whether behaviour's furnace or furnace superintendent confirmation vent area meet the requirements with shape.
Tuyere fast sealing partition combination unit provided by the invention is suitable for domestic and international all kinds of blast-furnace tuyeres, mainly
It substitutes the resistance to material of heavy and insecure indefinite form and blocks operation.Separated using the tuyere fast sealing and is combined the unit, it can be with
Quickly, access that is convenient, reliably and securely blocking air port and atmosphere, solves the leakage accident being originally difficult to avoid that and labour effect
Rate problem.In use, the specific steps of which are as follows:
1, confirm blast furnace damping down, and catch up with coal gas and furnace roof to light a fire and complete, connect the work for doing stifled air port after furnace superintendent instructs
Industry prepares；
2, will in advance fire complete air port fast sealing separate combination unit, by one group of the configuration in each air port, send to
Execute-in-place work；
3, multi-functional dedicated loop bar is used by operative employee, covers on partition combination unit metal barre, gently send to air port
Front end, and confirm that placement is secured；
4, confirm very close to each other between device and air port internal diameter by grasping furnace personnel in furnace, air port is completely enclosed, and by air port
Big lid closes；
5, blast furnace is blown the stage, after being connected to the job instruction that furnace superintendent discloses air port, is opened air port great Gai by operative employee, is prepared length
Drill rod；
6, with the tip of long drill rod, the grid lines of air port fast sealing partition combination unit is gently hit；
7, II is that personnel confirm that partition combination unit in air port is completely broken, has the insertion condition of coal rifle；
8, behaviour's furnace or furnace superintendent confirmation vent area and shape meet the requirements in furnace, without adhesion air port inner wall device
Residue；
9, the big lid in air port is closed by operative employee and locked；
10, after blast furnace air-supply, in wind pressure 600g, from air port window sem observation inlet shape, such as find that air port circumference has
Foreign matter should open eye hole mirror, disclosed again with long drill rod, close eye hole mirror after the completion.
The design of blast-furnace tuyere fast sealing partition combination unit by adopting the above technical scheme is being applied to the stifled wind of blast furnace
When mouth is with the work for disclosing air port, the requirement of blast furnace staying, air-supply was not only met, but also has had the characteristics that safety is time saving and energy saving, and had been a kind of
Novel, reliable device and operating method.It blocks up air port for current blast furnace and discloses the work present situation in air port, improves the binomial
Safety, rapidity, convenience and the reliability of operation revolutionize original use Work tool, auxiliary material and mode of operation.
Claims (9)
1. a kind of blast-furnace tuyere seals partition method, which is characterized in that be included in blast-furnace tuyere front end and one piece of brittle baffle is arranged
The step of, the insert seal item of the brittle baffle and blast-furnace tuyere inner wall joint equipped with metal material；By quality percentage
Than the brittle baffle is suppressed after being mixed by following material:
White alundum powder 78-70%, silicon carbide 15-10%, aluminium oxide 12-8%, cement 3-2.5%, water-reducing agent 0.5-0.2%.
2. blast-furnace tuyere according to claim 1 seals partition method, which is characterized in that it further include that top is disclosed through external force, it will
The brittle baffle fragmentation is the step of muti-piece is to restore blast-furnace tuyere air-supply.
3. blast-furnace tuyere according to claim 1 seals partition method, which is characterized in that when compacting, the brittle baffle
Surface is also formed with the frangibility impression in cross arrangement.
4. blast-furnace tuyere according to claim 1 seals partition method, which is characterized in that the brittle baffle is towards blast furnace
The surface of air port open-position-side is equipped with the pedestal or connector for facilitating and connecting the external body of rod, to keep the brittle baffle smoothly to be pushed
To the commitment positions of blast-furnace tuyere.
5. blast-furnace tuyere according to claim 1 or 3 seals partition method, which is characterized in that the thickness of the brittle baffle
Degree is 20mm.
6. blast-furnace tuyere according to claim 5 seals partition method, which is characterized in that the frangibility impression is in water chestnut
Shape, depth of cup 1mm.
7. a kind of blast-furnace tuyere seals partition apparatus, for being placed in blast-furnace tuyere, which is characterized in that the device matrix is in plectane
Shape, the diameter of plectane and the internal diameter of blast-furnace tuyere are adapted, and are embedded with metal o-ring on the cylindrical surface of the plectane；The base
The side of body is equipped with an attachment connecting interface；By mass percentage, the brittle baffle after the mixing of following material by suppressing:
White alundum powder 78-70%, silicon carbide 15-10%, aluminium oxide 12-8%, cement 3-2.5%, water-reducing agent 0.5-0.2%；
Described matrix surface is additionally provided with frangibility impression.
8. blast-furnace tuyere according to claim 7 seals partition apparatus, which is characterized in that the attachment connecting interface is rotation
Turn bayonet.
9. blast-furnace tuyere according to claim 7 or 8 seals partition apparatus, which is characterized in that the frangibility impression is in
Diamond shape, depth of cup 1mm；The plectane with a thickness of 20mm.
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|---|---|---|---|
| CN201710496449.5A CN109112242B (en) | 2017-06-26 | 2017-06-26 | Blast furnace tuyere fast sealing and separating method and device |
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|---|---|---|---|
| CN201710496449.5A CN109112242B (en) | 2017-06-26 | 2017-06-26 | Blast furnace tuyere fast sealing and separating method and device |
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| CN109112242B CN109112242B (en) | 2021-04-13 |
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| Publication number | Publication date |
|---|---|
| CN109112242B (en) | 2021-04-13 |
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