CN108727002A - A kind of closure press-in material to leak out for hot-blast stove furnace bottom basis - Google Patents
A kind of closure press-in material to leak out for hot-blast stove furnace bottom basis Download PDFInfo
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- CN108727002A CN108727002A CN201810684123.XA CN201810684123A CN108727002A CN 108727002 A CN108727002 A CN 108727002A CN 201810684123 A CN201810684123 A CN 201810684123A CN 108727002 A CN108727002 A CN 108727002A
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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
- C04B2235/44—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
- C04B2235/70—Aspects relating to sintered or melt-casted ceramic products
- C04B2235/74—Physical characteristics
- C04B2235/77—Density
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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
- C04B2235/9615—Linear firing shrinkage
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- Chemical & Material Sciences (AREA)
- Ceramic Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
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- Sealing Material Composition (AREA)
- Compositions Of Macromolecular Compounds (AREA)
- Ceramic Products (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a kind of closure press-in materials to leak out for hot-blast stove furnace bottom basis, and each component and its shared mass percent include：Special grade bauxite particulate material 40~50%；Special grade bauxite powder 25~35%；Active alpha-alumina powder 2~4%；Active silica fume 2~4%；Dispersant 0.05~0.5%；Furane resins 19~25%；Curing agent 1~3%.The press-in material has the characteristics that easy mechanized construction, good fluidity, the construction time is short, adhesive property is strong, normal temperature solidified, high strength after curing, volume stability are good；Shrinkage cracking existing for existing online restorative procedure can be effectively improved, the problems such as brittleness is big, there is important industrialized popularization value.
Description
Technical field
The invention belongs to technical field of refractory materials, and in particular to a kind of closure pressure leaked out for hot-blast stove furnace bottom basis
Pan feeding.
Background technology
After the attached hot-blast stove of blast furnace comes into operation or uses one section of period, hot wind furnace foundation gas leakage often occurs and runs wind etc. now
As, not only cause kinetic force and hot loss of energy, but also the gas leaked out contains certain toxic component, both polluted environment and also to
Overhaul of the equipments personnel bring security risk.In addition, hot-blast stove wants continuous production after coming into operation, it is difficult to be carried out to hot wind furnace foundation
Rebuild, and reconstruction expenses are huge, therefore need to progress repair online.
Current effective online restorative procedure be using with easy mechanized construction, good fluidity, construction time it is short,
Adhesive property is strong, normal temperature cure, high strength after curing, good volume stability the features such as press-in material wind position run to gas leakage carry out
Indentation filling, plays the role of sealing and leak stopping.Domestic and international existing indentation material mainly has waterglass combination, phenolic resin knot
Conjunction etc. is several, and above several press-in materials respectively have disadvantage for this position, and requirement is not achieved.As waterglass combination press-in material contains
Water is larger, and solidification after-contraction is big, is easy cracking；There are phenolic resin to need beforehand dilution, liquid feeding for phenolic resin combination press-in material
The shortcomings of amount is big, and normal temperature cure is slow, and diluent volatilization causes to shrink greatly after normal temperature cure, and brittleness is big.
Invention content
It is insufficient existing for existing hot-blast stove furnace bottom press-in material it is a primary object of the present invention to be directed to, it provides a kind of for heat
The closure press-in material that wind furnace furnace bottom basis is leaked out, the press-in material have easy mechanized construction, good fluidity, construction time short, viscous
The features such as tying strong performance, normal temperature solidified, high strength after curing, good volume stability.
To achieve the above object, the technical solution adopted by the present invention is：
A kind of closure press-in material to leak out for hot-blast stove furnace bottom basis, each component and its shared mass percent include：
In said program, in the special grade bauxite particulate material, Al2O3>=88wt%, Fe2O3≤ 1.5wt%；Its grain
Degree is 0~0.5mm.
In said program, in special grade bauxite powder, Al2O3>=88wt%, Fe2O3≤ 1.5wt%；Its granularity≤
0.088mm。
In said program, the active alpha-aluminium oxide powder Al2O3>=99wt%, granularity≤2 μm.
In said program, the active silica fume SiO2>=92wt%, granularity≤2 μm.
In said program, the dispersant is the one or both mixture in sodium hexametaphosphate, sodium tripolyphosphate, granularity
≤0.074mm。
In said program, solid content >=70wt% of the furane resins, viscosity is≤20mpa.s, density >=1.16g/
cm3。
In said program, the curing agent is phosphoric acid, concentration 60-70wt%.
A kind of preparation method of above-mentioned closure press-in material to leak out for hot-blast stove furnace bottom basis, includes the following steps：
1) each raw material is weighed according to the ratio；Special grade bauxite particulate material, special grade bauxite powder, active Alpha-alumina is micro-
Powder, active silica fume, dispersant mechanical agitation are uniformly mixed uniformly to gather materials；
2) furane resins are added and curing agent is uniformly mixed to obtain the closure press-in material.
It is described uniformly gather materials, furane resins and curing agent are individually packed, at the construction field (site), the furans that will individually pack
Resin and curing agent are weighed according to the ratio with uniform aggregates in a dry state, be sufficiently mixed and put it into after stirring evenly cement mortar pump into
Row indentation construction, blocks hot-blast stove furnace bottom basis place of leaking out.
According to closure press-in material prepared by said program, it have easy mechanized construction, good fluidity, construction time it is short,
The advantages that adhesive property is strong, normal temperature solidified, high strength after curing, good volume stability is applied to hot-blast stove furnace bottom basis and leaks
Wind can express out good repairing effect and stability.
The action principle of each component of the present invention is as follows：
Skeleton and powder selection special grade bauxite clinker (Al2O3>=88wt%), special grade bauxite clinker has
Al2O3Content is higher, and calcining is finer and close, ensure that press-in material has preferable volume stability；Micro mist selects active alpha-Al2O3
Micro mist and active silica fume, have good dispersion, large specific surface area, activity it is high the advantages that, can with packing material gap,
Bonding agent addition is reduced, the normal temperature strength of press-in material is improved, while can also effectively improve the suspension of press-in material, avoids material
There is segregation phenomenon in material.
Dispersant select sodium hexametaphosphate, sodium tripolyphosphate one or two, for by hydrolysis anion or sun from
Son, and it is adsorbed on the particle surface with point electricity, change its original electric layer structure, generates electrostatic repulsion, particle is made to disperse mutually
It comes, obtains good dispersion effect and stability；The viscosity of matrix slurry is reduced simultaneously so that material has preferably stream
Dynamic property and mechanical property.
Bonding agent selects furane resins, and viscosity is relatively low, and solid content is higher, is not required to the combination that dilution can be used as press-in material
Agent, heat resistance and water resistance are all fine, and the especially chemical corrosivities such as strong alkali-acid resistance are strong, and volume stability is preferable after solidification；Furan
Furane resins generally use sour curing mode, curing agent that phosphoric acid, sour addition is selected to make the conjugated double bond of furan nucleus in furane resins
It opens, dehydrating polycondensation reaction and C=C double bonds active group occur addition reaction and handed under acid catalysis between generation hydroxyl
Connection forms spatial networks three-dimensional-structure；In addition the curing reaction is exothermic reaction, and the amount of heat of releasing made in the material short time
Temperature increases, and material internal occurs irreversible volume expansion and promotes the further crosslinking curing of furane resins simultaneously, keeps material normal
Temperature solidification after obtain higher-strength and be accompanied by certain volume expansion, can be sufficient filling with leakage path and by body expand will
Channel pressings filling is closely knit, timely and effectively blocks air leakage parts duct；The concentration and addition of phosphoric acid are controlled, solidification is can control
The speed of reaction, and then control the hardening time of material.
Compared with prior art, beneficial effects of the present invention are also embodied by：
1) small on the influence of hot-blast furnace body structure, it leaks out to hot-blast stove furnace bottom basis and locates to carry out indentation sealing leak stopping, substantially
Furnace binding is not destroyed, does not also destroy the stove liner of resistance to material, is had no effect to hot-blast furnace body structure；
2) construction time is short, leaks out to hot-blast stove furnace bottom basis and repairs can be carried out under cold stoking state online, attached heat
Wind furnace alternate treatment does not influence blast fumance use；
3) good repairing effect, after treatment, more than 90% or more, the retention time is long, disclosure satisfy that for closure of leaking out
Onsite application requirement.
4) cost-effective, refractory brick need not be ordered again, without being built by laying bricks or stones after cool stove, at the of short duration cold stoking time
Reason reduces damping down time and maintenance cost, to save production cost.
Specific implementation mode
To more fully understand the present invention, the invention will be further described for following example.But present disclosure is not
It is limited only to the following examples.
In following embodiment, Al in the special grade bauxite particulate material of use2O3Content be 88.3%, Fe2O3Content
It is 0.8%；Its granularity is 0~0.5mm；Al in the special grade bauxite powder of use2O3Content be 89.1%, Fe2O3Content
It is 1.2%；Its granularity≤0.088mm；
Active alpha-the Al of use2O3In micro mist, Al2O3Content be 99.2%, granularity≤2 μm；Active silica fume
In, SiO2Content be 93.6%, granularity≤2 μm；The dispersant used is sodium tripolyphosphate, granularity≤0.074mm；It uses
In furane resins, solid content 74%, viscosity 17mpa.s, density 1.18g/cm3；Curing agent is phosphoric acid, a concentration of
65wt%.
Embodiment 1
A kind of closure press-in material to leak out for hot-blast stove furnace bottom basis, each component and its shared mass percent are：It is special
Grade alumine particle 48%, special grade bauxite powder 25%, active silica fume 2%, active alpha-alumina powder
3%, dispersant 0.2%, furane resins 20%, curing agent 1.8%；Preparation method includes the following steps：The superfine that will be weighed
Alumine particulate material, special grade bauxite powder, active silica fume, active alundum (Al2O3), dispersant claim according to the ratio
Forced mixer is added after amount to be uniformly mixed, gained mixture ton bag packed and transported；Furane resins, curing agent distinguish bucket
Mixture is put into forced mixer when using at the construction field (site) and furane resins and curing agent stirring 5 is added according to the ratio by dress
~8min, being directly pumped into using cement mortar needs sealing and plugging position.
Embodiment 2
A kind of closure press-in material to leak out for hot-blast stove furnace bottom basis, each component and its shared mass percent are：It is special
Grade alumine particle 42%, special grade bauxite powder 25%, active silica fume 2%, active alpha-alumina powder
3%, dispersant 0.2%, furane resins 25%, curing agent 2.8%；Preparation method includes the following steps：The superfine that will be weighed
Alumine particulate material, special grade bauxite powder, active silica fume, active alundum (Al2O3), dispersant claim according to the ratio
Forced mixer is added after amount to be uniformly mixed, gained mixture ton bag packed and transported；Furane resins, curing agent distinguish bucket
Mixture is put into forced mixer when using at the construction field (site) and furane resins and curing agent stirring 5 is added according to the ratio by dress
~8min, being directly pumped into using cement mortar needs sealing and plugging position.
The performance test results of 1 gained plugging material of the embodiment of the present invention are shown in Table 1, the performance test results of embodiment 2 with
The test result of embodiment 1 is suitable.
1 embodiment of table, 1 gained blocks the performance test results of press-in material
Comparative example 1~2
The present invention is blocked press-in material to compare with tradition closure indentation material, water glass is respectively adopted in comparative example 1~2
Glass, phenolic resin are as bonding agent, and bone meal material uses identical grain composition, and only addition slightly has due to the system of additive difference
Difference；The performance test results of gained press-in material are shown in Table 2,3 respectively.
2 waterglass of table makees the press-in material the performance test results of bonding agent
3 phenolic resin of table makees the press-in material performance the performance test results of bonding agent
It is compared by using the closure press-in material of different bonding agents it can be found that the present invention makees bonding agent using furane resins
Press-in material comparison the press-in material (being shown in Table 2) of bonding agent is made using waterglass, 110 DEG C × for 24 hours intensity index be not much different, but
The indentation stockline variation that waterglass makees bonding agent is -0.4%, and contraction is larger, this is because waterglass addition is big, solidification process
It is larger that middle large quantity of moisture volatilization causes material volume to shrink, and is unfavorable for running furnace bottom the indentation of wind air leak position；Comparison uses phenol
Press-in material (be shown in Table 3) of the urea formaldehyde as bonding agent, phenolic resin viscosity are larger, it is necessary to it could be used by solvent dilution,
During material solidification, solvent largely volatilizees and the effusion of a large amount of low molecular weight volatiles point causes material to generate certain contraction, and line becomes
Change reaches -0.2%.Phenolic resin solid content after dilution only has 20~30, and resulting materials intensity is relatively low, only 10.2Mpa.
(being shown in Table 1) of the invention makees bonding agent using furane resins, and the resin viscosity is relatively low, and solid content reaches 70% or more, and is not required to add
Enter diluent to can be used, the intensity higher after 110 DEG C of dryings of the press-in material may better resist air scour.It can also see
Go out line of material variation and also reach+0.2%, this is because under acid catalysis, material temperature increases, and inside generates centainly not
Crosslinking curing is space net structure after reversible volumetric expansion, simultaneously bulging reality hole can be preferably filled, plugging effect is more
It is ideal.
Application examples 1
Certain steel plant 1080m31#, 2#, 3# Ka Lujinshi the hot-blast stove furnace bottom of blast furnace leak out seriously, and wind-warm syndrome, wind pressure are
Produced on-site use cannot be met, furnace bottom air leakage parts are sealed by the closure press-in material for being formulated production described in embodiment 1
Leak stopping is pressed into construction period 8h, and the sealing ratiod that leaks out is more than 95% or more, and using effect is good；After hot-blast stove is repaired, normal work
Make the time more than 3 years.
Application examples 2
Certain steel plant 1080m3Both furnace bottom leaks out seriously for the 1# of blast furnace, the blow-on of 2#, 3# Ka Lujinshi hot-blast stove, takes a variety of
Method can not reach requirement, be carried out to furnace bottom air leakage parts by the closure press-in material for being formulated production described in embodiment 2 close
Leakage is blocked, is pressed into construction period 22h, the sealing ratiod that leaks out is more than 90% or more, and plugging effect is good；After hot-blast stove is repaired, just
The normal nearly 2 years working time, use state is still good at present.
Obviously, above-described embodiment be only intended to clearly illustrate made by example, and not limitation to embodiment.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And the obvious variation or change therefore amplified
It moves within still in the protection domain of the invention.
Claims (9)
1. a kind of closure press-in material to leak out for hot-blast stove furnace bottom basis, each component and its shared mass percent include：
2. closure press-in material according to claim 1, which is characterized in that in the special grade bauxite particulate material, Al2O3
>=88wt%, Fe2O3≤ 1.5wt%；Its granularity is 0~0.5mm.
3. closure press-in material according to claim 1, which is characterized in that in the special grade bauxite powder, Al2O3≥
88wt%, Fe2O3≤ 1.5wt%；Its granularity≤0.088mm.
4. closure press-in material according to claim 1, which is characterized in that the active alpha-aluminium oxide powder Al2O3≥
99wt%, granularity≤2 μm.
5. closure press-in material according to claim 1, which is characterized in that the active silica fume SiO2≥
92wt%, granularity≤2 μm.
6. closure press-in material according to claim 1, which is characterized in that the dispersant is sodium hexametaphosphate, trimerization phosphorus
One or both mixture in sour sodium, granularity≤0.074mm.
7. closure press-in material according to claim 1, which is characterized in that solid content >=70wt% of the furane resins,
Viscosity is≤20mpa.s, density >=1.16g/cm3。
8. closure press-in material according to claim 1, which is characterized in that the curing agent is phosphoric acid, concentration 60-
70wt%.
9. the preparation method of the closure press-in material to leak out for hot-blast stove furnace bottom basis described in any one of claim 1~8, special
Sign is, includes the following steps：
1) each raw material is weighed according to the ratio；By special grade bauxite particulate material, special grade bauxite powder, active alpha-alumina powder,
Active silica fume, dispersant mechanical agitation are uniformly mixed uniformly to gather materials；
2) furane resins are added and curing agent is uniformly mixed to obtain the closure press-in material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810684123.XA CN108727002B (en) | 2018-06-28 | 2018-06-28 | Plugging press-in material for air leakage of bottom foundation of hot blast stove |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810684123.XA CN108727002B (en) | 2018-06-28 | 2018-06-28 | Plugging press-in material for air leakage of bottom foundation of hot blast stove |
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| Publication Number | Publication Date |
|---|---|
| CN108727002A true CN108727002A (en) | 2018-11-02 |
| CN108727002B CN108727002B (en) | 2021-06-08 |
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| CN201810684123.XA Active CN108727002B (en) | 2018-06-28 | 2018-06-28 | Plugging press-in material for air leakage of bottom foundation of hot blast stove |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825658A (en) * | 2019-02-28 | 2019-05-31 | 中国十九冶集团有限公司 | The method that processing hot wind drop-bottom leaks out |
| CN111875360A (en) * | 2020-06-16 | 2020-11-03 | 浙江攀盛冶金材料有限公司 | Corundum injection material |
| WO2021183515A1 (en) * | 2020-03-10 | 2021-09-16 | Phospholutions Inc. | Agglomerated dispersible granules, methods for amending soil, and activated alumina suspensions |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109825658A (en) * | 2019-02-28 | 2019-05-31 | 中国十九冶集团有限公司 | The method that processing hot wind drop-bottom leaks out |
| WO2021183515A1 (en) * | 2020-03-10 | 2021-09-16 | Phospholutions Inc. | Agglomerated dispersible granules, methods for amending soil, and activated alumina suspensions |
| CN111875360A (en) * | 2020-06-16 | 2020-11-03 | 浙江攀盛冶金材料有限公司 | Corundum injection material |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108727002B (en) | 2021-06-08 |
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