CN107869912B - The repair method of carbon roasting kiln - Google Patents
The repair method of carbon roasting kiln Download PDFInfo
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- CN107869912B CN107869912B CN201711093463.7A CN201711093463A CN107869912B CN 107869912 B CN107869912 B CN 107869912B CN 201711093463 A CN201711093463 A CN 201711093463A CN 107869912 B CN107869912 B CN 107869912B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D1/1636—Repairing linings by projecting or spraying refractory materials on the lining
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- 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
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- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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- 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
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
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- 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
- C04B2235/44—Metal salt constituents or additives chosen for the nature of the anions, e.g. hydrides or acetylacetonate
- C04B2235/447—Phosphates or phosphites, e.g. orthophosphate, hypophosphite
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- 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
- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/52—Constituents or additives characterised by their shapes
- C04B2235/5208—Fibers
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- 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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
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- 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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/96—Properties of ceramic products, e.g. mechanical properties such as strength, toughness, wear resistance
- C04B2235/9607—Thermal properties, e.g. thermal expansion coefficient
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- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
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- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Abstract
Topic of the invention is " repair method of carbon roasting kiln ".The present invention provides the sealing compositions in the crack for repairing carbon roaster, composition main component has alumine, microdilatancy fine powder, can be further configured with low-temperature binder, dispersion water-reducing agent, explosion-proof fiber etc..The present invention provides spraying blenders, have stirring and spray structure.The method comprise the steps that 1. prepare spray paint, 2. are squeezed into carbon baking furnace crack, and 3. solidify spray paint.Wherein spraying blender can efficiently squeeze into spray paint in crack.Spray paint can there are many, the different parts suitable for carbon baking kiln.
Description
Technical field
The invention belongs to roaster fields, specifically carbon production field.Specifically, the present invention is one kind about carbon
The restorative procedure of roaster.Method of the invention is to carry out field repair to carbon baking furnace, so as to make carbon baking
Furnace is more enduringly used for carbon production.It is suitable for the reparation of other roasters.
Background technique
Ring-form calcining furnace is the large-scale thermotechnical furnace kiln plant for producing carbon product most critical.Carbon also writes charcoal element, carbon
Production also writing charcoal element production.
For a prebaked anode factory, the capital expenditure of ring-form calcining furnace accounts for the 50% of entire carbon element factory's gross investment
~60%, and the advance of Anode Baking Furnace Design and technology is to the quality of product, the production capacity of specific investment cost, energy consumption and Integrated Energy
Using, furnace life, production cost all have a great impact.The design of baking furnace flame path wall construction, the selection of material and
Construction technology is to design the technology of roaster most critical.
The flue wall of carbon production enterprise ring-form calcining furnace uses brickwork construction, by light fire brick, refractory fireclay block, different
Type fire resisting brick masonry forms.
According to the difference of baking furnace flame path wall size, every flue wall weighs about 7~9 tons, up to 40 layers of brick layer.Sometimes, very
To using more layers brick.
In process of production, repeatedly heating and cooling (800 DEG C~1250 DEG C), cooling (60 DEG C~40 are required according to technique
DEG C), when filling, coming out of the stove every time, crown block clamp, carbon product are all inevitably collided on flue wall, and such flue wall is just
It can deform, deformation reaches a certain level, and must just remove and build again.
Flue wall main damage forms: traditional handicraft adds refractory wass to build using refractory brick, beats using sleeping seam grey, vertical
Seam does not beat the brick-building art of ash, will appear brickwork joint mud in this way and falls off, affects the overall structural strength of flue wall.
More the fastness of flue wall is focused on due to laying bricks, but has ignored the flow direction of flame, has inevitably occurred
Temperature dead angle impacts the uniformity of product.
In process of production due to generating differential thermal expansion and frequent heating and cooling and the shock for taking on roasting product, cause
Flue wall deformation, then flame do not follow the correct path → temperature dead angle → temperature difference becomes larger → vicious circles, the energy consumption such as furnace box deformation increase,
Converter life is reduced, middle light maintenance is frequent.
The design of country's carbon baking furnace is the technology introduced from foreign countries the fifties at present, and flue wall uses brick masonry knot
Structure experienced half a century, and be used by most of carbon element factories.With production practices further deeply, the one of the technology
A little technical problems are also gradually exposed.Main problem is several just like under:
(1) side flue wall protrudes outward or integral inclined, and hopper is made to narrow, and takes on furnace difficulty.
(2) intermediate quirk makes quirk narrow, influences the flowing and combustion efficiency of hot-fluid gas to inside and outside recess.
(3) quirk wall crack is serious, leads to material leakage of leaking out, and influences product quality, increases heat energy loss, breakage is than more serious
Flue wall must carry out in repair, overhaul.Since flue wall is formed by fritter fire resisting brick masonry, a flue wall is removed about
7~8 hours are needed, building again needs 24 hours or so, and nearly 17 tons of material must just be carried by removing one flue wall of block of laying equal stress on,
This, which not only gives, repairs furnaceman and brings difficulty, but also gives the normal production in workshop increase difficulty.Especially ring-form calcining furnace is to follow
Ring mode operation, leave for maintenance, dismounting, again build flue wall time it is at full stretch, usually in furnace temperature, there are also at 80 DEG C~90 DEG C
It must just start to shape, working environment is extremely severe, influences construction quality again in turn, forms vicious circle.
Compared with same kind of products at abroad, there is biggish gap in China with the refractory quality on ring-form calcining furnace, tool
For body, the physical and chemical indexes such as high-temperature creep resistance, load softening point, high high-temp stability and product outline size accuracy have
Gap.In addition production management, the influence of operate etc., average life of China's carbon baking furnace flame path wall is 80~
100 heats, external roaster commonly reach 150 heats.
In today that market competition is growing more intense, various product all must inexpensively be won the market with high-quality, carbon product
It is no exception.If baking furnace flame path wall deformation is serious, the quality of product certainly will be influenced, especially influence yield, increase is produced into
This, is not able to satisfy production requirement, it is difficult to obtain good economic benefit.
For drawbacks described above existing for brick flue wall, external more carbon products production company sets fire tunnel wall structure
The improvement of numerous studies has been made in meter, the use of material and masonry way etc..According to relevant information, U.S.'s Berkeley and benefit
De Han nurse company is bold in innovation to the masonry way of flue wall, the method built a wall in advance using strange land, and Integral lifting is to now
Field installation.The technology substantially reduces the construction time, improves construction environment, alleviates labor intensity, improves roaster
The quality of yield and brick flue wall.Accuracy and all kinds of carbon element factory's lifting equipments in view of China's fire brick type size is limited,
Realize that the whole pre- block in strange land, integral hoisting are difficult to realize.
China's annular roaster technology undergoes two developing stage altogether.50~seventies of first stage, ring-form calcining furnace was basic
On do not jump out the type of furnace frame when Soviet Union helps build, only improve to some extent in partial structurtes, generally apparently, substantially circular furnace skill
Art falls behind.Second stage is that China's circular furnace to new circular furnace changes period so far since the eighties.
Initial stage eighties China has introduced new ring type technology from Japan, and hereafter, Shenyang designing institute is China's aluminium carbon again
Plain factory devises the new circular furnace that a batch has " day light furnace " or " Reed Harmer furnace " technical characterstic, and has gone into operation in succession.
Though ring-form calcining furnace of new generation is improved from furnace chamber volume, combustion system, bell inner lining material etc., make
The technical-economic index of ring-form calcining furnace is substantially change, but flue wall is still the brick technology using fritter brick masonry,
Service life existing for flue wall is short, big or middle to repair the puzzlement yield such as time length, and product quality problem still remains.
Over 20 years, China is few in the Comparision that the research of circular furnace flue wall, novel aspects are done.
Currently, China's ring-form calcining furnace flue wall recess, deformation, service life it is short be influence stove production capacity it is main because
Element；The crack of brick flue wall, leak out, stove upper and lower temperature difference has large effect to product quality greatly；The overhaul time is long, constructs
Bad environments are the problems in production management.
Therefore says, carbon industry be badly in need of develop, exploitation use novel refractory, structure novel, science, convenient for construct,
The flue wall new technology of maintenance.
The excellent refractory material of service performance extends the service life of baking furnace flame path wall, makes furnace indoor temperature distribution
More evenly, be conducive to improve product quality, design science, construction technology rationally, efficiently, easy, shorten overhaul flue wall
Time, as far as possible improve roaster production capacity, reduce production cost.
Present inventor has developed novel carbon baking furnace flame path cross wall press-in material.Revolutionize smear not into, apply
The not problems such as tight, out-of-flatness, work well, and energy conservation is obvious, and the secrecy test user to be contracted very much welcomes.
Present inventor also invented new construction instrument, can be stirred and spray to material and repair.
Present inventor is also noted that each section difference of carbon baking furnace, is repaired with different materials, from
And reach best repairing effect.
The above field repair for making great efforts to solve the problems, such as carbon baking furnace, realizes the mesh that carbon production factory efficiently produces
's.
Summary of the invention
First aspect, the present invention are a kind of composition first.
It is a kind of novel indentation material, the repairing for carbon baking furnace.With characteristic resistant to high temperature.In use, adopting
The technology in crack is squeezed into high pressure, more traditional use is easily accessible inside crack for manually daubing into.
It is extraordinary spray paint, performance characteristics: bulk density, compressive resistance, refractoriness under load, Linear change rate, resistance to
Fiery degree, high temperature break resistant intensity, thermal shock resistance, thermal conductivity etc. are stronger than traditional handicraft, and high.Specific targets are detailed in table
1。
Table 1
Above-mentioned press-in material is to use based on down-draft kiln High-Alumina bauxite clinker, and microdilatancy fine powder is added, adds low-temperature binder, adds
Disperse water-reducing agent, adds explosion-proof fiber, be made into premix.In use, adding silica solution in premix.
In refractories industry, bauxite typically refers to Al after calcining2O3Contain Fe more than or equal to 48%2O3It is lower
Bauxite.
In refractories industry, bauxite chamotte is the bauxite ore by calcining.Clinker is greyish white pale yellow and deep
Grey.It is mainly used for high alumina refractories.Bauxite chamotte can also be called high alumina bauxite.
Down-draft kiln is a kind of intermittent kiln.Its title is obtained by flame mobility status.Fire caused by burning
Flame all goes upward to Yao Ding from the bocca of combustion chamber, and since kiln top is sealing, flame cannot continue uplink, what is be driven into a corner
In the case of, downlink is just pulled to by the draft of chimney, by the gap of bung, inhales fire hole into branch flue, flue collector, most from kiln bottom
It is discharged afterwards by chimney.Because hot gas severe is light, always float on above, so people's habit from top to bottom calls flame
" suitable ".And call " " the flame flowed from top to bottom, here it is the origin of " down-draft kiln " address.
In the present invention, the obtained bauxite of other modes calcining can be used in bauxite.Preferably, using down-draft kiln
High-Alumina bauxite clinker is aggregate, and reason is that the resulting bauxite property of this manufacturing method is relatively stable.
In the present invention, down-draft kiln material sintering temperature is high, when as clinker, shrinks small.
Microdilatancy fine powder starts to expand at 600 DEG C, to reduce the crack generated when bauxite high-temperature shrinkage, can preferably make
The chilling of material anxious hot can increase.
The effect of low-temperature binder is to be more convenient for sinter molding under low temperature.Usage amount is micro.
The function of dispersion water-reducing agent is that water consumption is reduced, and mobility increases, and intensity increases.Usage amount is micro.
The effect of explosion-proof fiber is to increase gas permeability and caking ability.Usage amount is micro.
It is micro to refer to additive amount equal to less than 1%.
Mentioned component is mixed into premix.Premix can be prepared in the place far from scene.It can also be in the time
On prepared in advance.Premix can be used as a product, sell separately.
At the scene or elsewhere, before use, silica solution can be added in premix.The effect of silica solution is to increase
Caking ability, convenient for sintering.
In an example, material compositions of the invention have following composition and characteristic:
Aluminum oxide 50%, di-iron trioxide < 1.8%, Er Yangization Gui≤28%
1200 DEG C of 3h≤35 * compressive resistance Mpa
350 DEG C of * 3h 12.5 of flexural strength Mpa
%1000 DEG C of * 3h-0.1 of Linear change rate
Bulk density g/cm3110℃*24h≧2.2g
1350 DEG C of Mpa refractoriness under load
Generally speaking, the aluminum oxide share that material compositions of the invention contain wants bigger than normal, and di-iron trioxide has one
A upper limit value, silica have a lower limit value.When these ingredients meet the requirements, further to meet compressive resistance,
The requirement of flexural strength, Linear change rate, bulk density, refractoriness under load.All combinations of materials within the scope of These parameters
Object may be incorporated for implementing the present invention, within disclosure of the invention and protection scope.
Material compositions of the invention can be due to aluminum oxide, di-iron trioxide, the content of silica or ratio
Example variation, to be configured to the different material compositions of multiple performance.
For example can make following composition: alumine is aggregate total content 65%, mullite fine powder (200 mesh) or
Person's andalusite fine powder (200 mesh) 35% is used as microdilatancy fine powder.Aluminium dihydrogen phosphate is micro as bonding agent.
Following composition can for another example be made: alumine is aggregate, total content 65%；Powder Brown Alundum is thin
Powder (200 mesh), calcined oxide aluminium powder (500 mesh), Cab-O-sil do microdilatancy fine powder and use (fine powder total content 35%), add low temperature bond
(micro) composition of agent.
When construction, additional silica solution is compound.
Material compositions of the present invention can also be formed two with the silica solution of corresponding amount and be combined production with independent commodity selling
Product sale.
It is the finished product containing silica solution that material compositions of the present invention, which can also be used as, is sold or short is guaranteed the quality in limited time
Phase product is sold.
The second aspect, the present invention are a kind of methods repaired for carbon baking furnace.
Carbon roasting kiln and other stoves difference feature are:
1. volume is big, modular design is 100 meters-150 meters of length, 20 meters of width --- 40 meters, 5-6 meters of depth.
2. technique heating cooling is frequently, such as maximum temperature is up to 1250 degree.
3. furnace chamber design hole is more, such as one 54 Room kiln observation holes, measured hole up to 500.
So being influenced by its process characteristic, after carbon baking furnace runs a period of time, stove cracking is inevitable.Again
In addition itself reserved hole of design is more, cause roasting kiln race wind flat, ultimately cause gas consumption height, product oxidation is closed
The decline of lattice rate, the stove lost of life.
The second aspect of the present invention is exactly to be repaired using various types of materials composition described in first aspect present invention
The method of carbon baking furnace.
After running a period of time due to carbon baking furnace, stove cracking is inevitable.How stove sealing skill is developed
Art reduces production cost, is increasingly taken seriously.
Present inventor has found that traditional stove is sealed just for furnace wall facade, ignores vertical by carefully studying
Body is smeared using artificial mud, and the service life is short, and using once just falling off, speed of application is slow, and chamotte waste is big.
Then, present inventor proposes Novel carbon element stove sealed energy-saving.Technology is exactly how one kind repairs carbon
The method of plain stove.
Charcoal element stove is that several rectangular combustion chambers being made of flue wall and cross wall are constituted.It is to place charcoal in combustion chamber
Block is roasted.There is fire door above flue wall.There is smoke outlet on cross wall.
After carbon stove use, it may occur that crack, needing to repair could use.
Present inventor has invented many material compositions, for repairing these cracks.
Since the top and the bottom temperature of each rectangular combustion chamber is different, so the fire resistance needed is also different.
In an example, method of the invention has used two kinds of compositions, Lai Jinhang carbon furnace reparation.
Lower part feed composition, i.e. lower part expect material therefor: alumine is aggregate, accounts for the 65% of total content, mullite is thin
Powder (200 mesh) or andalusite fine powder (200 mesh) 35%, as microdilatancy fine powder.Aluminium dihydrogen phosphate is micro as bonding agent.
Top feed composition, i.e. top expect material therefor: alumine is aggregate, accounts for the 65% of total content；Powder is used
Brown Alundum fine powder (200 mesh), calcined oxide aluminium powder (500 mesh) or Cab-O-sil do microdilatancy fine powder use, and fine powder total content 35% adds
(micro) composition of low-temperature binder.
To divide into two parts up and down at the half of the height of combustion chamber, expected respectively using top feed composition and lower part
Composition is repaired.
After repairing, the sealing of combustion chamber is realized, so as to reach many effects such as energy conservation.
It is, of course, also possible to which the characteristics of according to combustion chamber, divide into top and the bottom and corner parts, to prepare three
The different components that part uses, repairing and sealing for three parts.
Therefore, method for repairing and mending of the invention can carry out the differentiation of two class positions to combustion chamber position, to use two kinds of groups
Object is closed to be repaired.Method for repairing and mending of the invention can also carry out the differentiation of three classes position to combustion chamber position, to use three kinds
Composition is repaired.
It distinguishes the factors such as the degree of aging of Size of Crack and brick based on combustion chamber and distinguishes in position.What position was distinguished
Quantity can have upper and lower dichotomy method, upper and lower and quadrangle trichotomy.It can certainly further refine, because of carbon baking kiln
It is the continuous fenestral fabric being made of flue wall and cross wall, has fire door on flue wall, have smoke outlet on cross wall.Quirk the foot of a wall
According to present position, and it is divided into side flue wall and intermediate flue wall.So in combustion chamber is repaired, can to it is specific repair position into
Row further subdivision, using different sealing compositions.
It is to be entered with liquid or semi-liquid stage with compressed air extruding in view of sealing material of the invention.It squeezes
Before can be produced in big crack using the materials such as stainless steel wire so as to which sealing material is limited in target location
Stretching resistance and adhesive force.So material is seldom or does not drop to by using sealing material of the invention and integrated construction machine
Bottom of combustion chamber, the problem of forming waste and increase cleaning works.
These are all the specific implementations for the invention thought that differentiation position of the invention is repaired using different materials, are existed
Within the scope of the present invention.
In terms of third, the present invention provides a construction tools.
The construction tool is a spray equipment, including spray structure and stirring structure.
Stirring structure is a forced mixer, including motor and rotating device.Material enters stir chamber, and motor drives
Rotating device stirs evenly material.
The power of motor of blender can be selected according to actual needs.Typically, power of motor is 5.5kw.
Stirring structure can make mixing speed fast, and it is uniform to stir material.
Stirring structure is ined succession spray structure.
Spray structure is a wet-spraying machine.
Wet-spraying machine preferably can connect frequency converter.The size of the adjustable load of frequency converter,
The distance that wet-spraying machine can convey reaches 40 meters.It has been suitble to the needs of remote spraying.
The power of motor of wet-spraying machine can be selected according to actual needs.Typically, power of motor is 7.5kw.
The use of this stirring spraying all-in-one machine, can enable coating quality to guarantee.
Still further, which can connect compressed air generator device, so that wet feed be made to be ejected into seam
In gap.
The use of stirring spraying all-in-one machine and pressure apply, and patching material can be filled into the depths in crack, reached
Preferable repair efficiency.
Preferably, stirring spraying all-in-one machine of the invention can be designed to once stir about 300 kilograms of material, can
Reparation suitable for about 7 combustion chambers (also referred to as ditch or case).
All-in-one machine of the invention can carry air compressor, form high-pressure injection coating.
The air compressor or pipeline at kiln scene can also be applied in all-in-one machine of the invention, thus using in factory
Compressed air.
The spray head of flush coater preferably has frequency modulation function.To which injection frequency can be adjusted.
It can be in relation to valve closing door, to realize mask work between blender and flush coater.Valve can with pipe with
Blender is connected with flush coater.When valve is in open state, the material after stirring can enter flush coater, to spray to
In predetermined gap.
Comprehensive the second aspect of the invention and third aspect, relative to the existing method using artificial mud mud daub,
The construction characteristic of Novel carbon element stove sealed energy-saving technology provided by the invention shows following technical advantage:
1. using different patching materials for different parts, the service life is long, and speed is fast.
2. sealing means are sealed using omnibearing stereo.Sealing effect is good, it is therefore prevented that the influence that natural gas and air generate.
3. replacing artificial mud trowelling, carbon stove Special seal equipment, using special material, i.e., group of the invention are used
Close object.It saves artificial.
4. using special material, the i.e. present composition, there is certain flexibility, adapt to expanding with heat and contract with cold for furnace body, thus
Extend converter life.
5. press-in material physical and chemical index:
(1) bulk density (110 DEG C × for 24 hours) >=2.1g/cm3
(2) compressive resistance (1200 DEG C × 3h) >=50MPa
(3) refractoriness under load (0.2MPa × 4h) >=1250 DEG C
So can be realized good economic value using novel carbon stove sealed energy-saving technology of the invention.
By 100,000 tons of carbon scale, economic value estimation is as follows:
1. natural gas unit consumption reduces by 5 cubes/ton.3 yuan/cube of Gas Prices, year can save 1,200,000 yuan.System's sealing
Caused by effect is good.
2. reducing air enters high-temperature product, oxidation is eliminated, improves product quality 0.5%.Year can increase yield 400
Ton.According to 2000 yuan, year can save 800,000 yuan for increment per ton.It is caused by sealing effect.
Artificial 3 people is repaired 3. saving, 150,000 yuan of Nian Jieyue.It is caused by Spray painting tool use.
4. year 100 tons of fire clay, 2500 yuan per ton, 250,000 yuan of Nian Jieyue of saving.Caused by based material replacement.
5. reducing filler material oxidation after covering, consumption per ton reduces by 1 kilogram, 0.6 yuan of per kilogram, 50,000 yuan of Nian Jieyue.It is close
It seals caused by effect.
6. 2,000,000 yuan of the expense of annual stove light maintenance, extend a Nian Shouming, 2,000,000 yuan of Nian Jieyue.
Above 7, add up to 4,450,000 yuan.
If pressing 200,000 tons of carbon scale, economic benefit is about 8,900,000 yuan, intimate 10,000,000 yuan.
Roaster is repaired so starching relative to artificial claying, method for repairing and mending provided by the invention has significant economic effect
Benefit.
Detailed description of the invention
Fig. 1 is the partial schematic diagram of carbon baking furnace.For top view.1 is combustion chamber, is also called case or ditch, is raw material
Receive the place of calcination process, is rectangular shape.2 be side wall with flues.3 be intermediate wall with flues.4 be cross wall.5 be fire door.6 be smoke evacuation
Mouthful.
Actual roaster has many ditches, is easy to produce crack on ditch, is that restorative procedure of the invention is solved
The place of technical problem.
Fig. 2 is the schematic diagram for spraying blender.For side view.10 be motor, and 20 be agitator tank, and 30 be spray equipment.Electricity
Machine can drive the agitating device in agitator tank, be stirred to material.The material being stirred can be sprayed by spray equipment to be needed
On the ditch of the roaster to be repaired in crack.
Specific embodiment
Spray paint technical indicator:
| Detection project | New material average value |
| Bulk density (110 DEG C * 24/2) g/cm3 | 2.45 |
| Compressive resistance (110 DEG C * 24/2) MPa | 96.7 |
| Compressive resistance (1400 DEG C * 24/2) MPa | 46.2 |
| Refractoriness under load (0.2Mpa0.6%) DEG C | 1470 |
| Linear change rate (1400*3/2) % | +0.2 |
| Refractoriness DEG C | > 1800 |
| High temperature break resistant intensity (1300 DEG C * 1/2) MPa | 1.2 |
| Seismic stability (1100 DEG C of * water coolings)/time | ≥50 |
| AL203% | 69.76 |
| Thermal conductivity (1100 DEG C of surface temperature) W/M.K | 1.130 |
Field operation brief introduction:
1. the preparation before construction
1.1 get all the construction equipment and various tools ready；
1.2 get out the appliances for labor protection such as safety cap, safety belt, gloves, protective garment；
1. preparing hard press-in material, avoid influencing live use；
Whether 1.4 inspection hard press-in materials meet the requirement of this subjob；
1.5 get all the steel wire, anchoring piece, wire netting, iron wire and live easily-consumed products ready；
1.6 prepare flexible car one, in case live Emergency use.
2. mobilization
2.1 appoint a project manager, are responsible for comprehensive work of the engineer operation；
2.2 appoint operation team leader one, and dispensing project manager coordinates field operation；
2.3 appoint technician one, are responsible for the branch art guidance of the projects operation；
2.4 appoint security official one, are responsible for the trouble free service of the engineering；
2.5 select and appoint skilled operation worker 5, participate in engineer operation operation.
3. construction characteristic and effect
3.1 binding speeds are fast
Cracking, the wall of deformation, corner gap can be made to bond in 10 hours again, be integrally formed entire hopper.From
And product can be made to be heated evenly in roasting；Gas consumption is saved, product qualification rate is improved.
The characteristics of 3.2 filling and repairing material
Filling and repairing material has the characteristics that flexibility, creep, microdilatancy, solidification are fast.The chilling being suitable in roasting process is anxious
Hot is atopic.
In the bottom of roaster, middle part, top, quadrangle, depending on the temperature, duration is roasted, it is different using expansion joint (E.J.) degree
Microdilatancy ceramic fiber paper, wear-resisting high alumina bonding proportion, until up and down one.
The advantage of 3.3 new processes
Process is directly, solidification is fast, service life is long.
It solves puzzlement carbon element anode roasting furnace multiple multiple tracks flue wall deformation every year always, cracking, run wind, gas leakage, leakage
Material increases energy consumption, increases operational safety risk and thoroughly solve the problems, such as to stop production to tear open again to build again.
3.4 comparative advantages
This technology generations needs manually to mend the cumbersome inefficient of fire clay after producing every time for tradition, and the labour for alleviating worker is strong
Degree, reduces the security risk that worker works in the presence of a harsh environment, can extend service life 3 years of roaster or more.
The energy-saving safe feature of 3.5 follow-up operations
Safe operation, energy-saving guarantee are provided to carbon baking furnace subsequent technique.
3.6 high quality of products and high finished product rate
It being preheated during carbon baking, matches spoon, cooling, temperature control has been the key link, and the cracking of flue wall,
The deflation that leaks out cannot make product integrally by thermal balance again, so it is directly related to the technical indicators such as product quality and yield rate.
4. checking and accepting
Without obvious slight crack in ditch, wind gas leakage is not run, saves natural gas 3-5m on the basis of now3, improve product quality
0.5%.
From the point of view of 54 Room calcining kilns, the annual maintenance expense of every bar ditch is about at 290 yuan, so a calcining kiln year ties up
Shield expense is at 1,000,000 yuan or so.Mud is applied relative to artificial, expense reduces significant.Method of the invention has significant economic effect
Benefit.
Claims (5)
1. a kind of carbon baking furnace restorative procedure, this method comprises: 1. prepare spray paint, 2. are squeezed into carbon baking furnace crack,
3. solidifying spray paint；The spray paint is divided into two kinds, i.e. top spray paint and lower part spray paint, is respectively used to repair carbon roasting
Burn top half and the lower half portion of the combustion chamber of furnace；The top spray paint and lower part spray paint are by alumine, micro- swollen
Swollen fine powder and low-temperature binder composition；In the top spray paint and lower part spray paint: the content of aluminum oxide is 50%, three
The content of two iron is aoxidized less than 1.8%, the content of silica is more than or equal to 28%；
The top spray paint accounts for the 65% of top spray paint total content, Brown Alundum fine powder, calcining oxygen using alumine as aggregate
Change aluminium powder or Cab-O-sil as microdilatancy fine powder, the 35% of top spray paint total content is accounted for, with alumine and microdilatancy fine powder
Gross mass on the basis of, the additive amount of low-temperature binder is less than or equal to the 1% of alumine and microdilatancy fine powder gross mass；
The lower part spray paint accounts for the 65% of lower part spray paint total content, mullite fine powder or red using alumine as aggregate
Pillar fine powder accounts for the 35% of lower part spray paint total content as microdilatancy fine powder, with total matter of alumine and microdilatancy fine powder
On the basis of amount, the additive amount of bonding agent aluminium dihydrogen phosphate is less than or equal to the 1% of alumine and microdilatancy fine powder gross mass.
2. restorative procedure according to claim 1, spray paint is squeezed into carbon baking furnace and is carried out using spraying agitating device.
3. restorative procedure according to claim 2, spraying agitating device includes stirring structure and spray structure.
4. restorative procedure according to claim 1, the top spray paint and lower part spray paint also contain dispersion water-reducing agent.
5. restorative procedure according to claim 1, the top spray paint and lower part spray paint also contain explosion-proof fiber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201711093463.7A CN107869912B (en) | 2017-11-08 | 2017-11-08 | The repair method of carbon roasting kiln |
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| CN201711093463.7A CN107869912B (en) | 2017-11-08 | 2017-11-08 | The repair method of carbon roasting kiln |
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| CN107869912B true CN107869912B (en) | 2019-05-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101660869B (en) * | 2009-08-13 | 2012-09-19 | 甘肃中顺石化工程装备有限公司 | Spray repair method for lining of kiln firebrick |
| CN103114169A (en) * | 2013-03-07 | 2013-05-22 | 北京瑞普同创科技发展有限公司 | Converter wet spray repair technique |
| CN103979987B (en) * | 2014-05-20 | 2016-04-20 | 湖州浙宝冶金辅料有限公司 | Hot wear-resisting, alkaline-resisting spray material of a kind of lime stove liner and preparation method thereof |
| CN105110800A (en) * | 2015-07-15 | 2015-12-02 | 武汉威林科技股份有限公司 | Wet spraying coating for blast furnace shaft bottom inner liner, application thereof, and restoration method of blast furnace shaft bottom inner liner |
| JP6555016B2 (en) * | 2015-08-31 | 2019-08-07 | 日本製鉄株式会社 | Coke oven carbonization chamber repair method |
| CN106995309A (en) * | 2017-05-09 | 2017-08-01 | 郑州耐都热陶瓷有限公司 | Fire resisting liner body crack is squeegeeed material |
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