CN102584304B - Large blast furnace swing spout - Google Patents
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- CN102584304B CN102584304B CN 201210069206 CN201210069206A CN102584304B CN 102584304 B CN102584304 B CN 102584304B CN 201210069206 CN201210069206 CN 201210069206 CN 201210069206 A CN201210069206 A CN 201210069206A CN 102584304 B CN102584304 B CN 102584304B
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- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 20
- 239000011449 brick Substances 0.000 claims abstract description 20
- 239000000843 powder Substances 0.000 claims abstract description 17
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000654 additive Substances 0.000 claims abstract description 11
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- 229910052582 BN Inorganic materials 0.000 claims abstract description 8
- PZNSFCLAULLKQX-UHFFFAOYSA-N Boron nitride Chemical compound N#B PZNSFCLAULLKQX-UHFFFAOYSA-N 0.000 claims abstract description 8
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 8
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 claims abstract description 8
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910010271 silicon carbide Inorganic materials 0.000 claims abstract description 8
- 239000003638 chemical reducing agent Substances 0.000 claims description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 22
- 239000002131 composite material Substances 0.000 claims description 20
- 239000003795 chemical substances by application Substances 0.000 claims description 17
- 239000004411 aluminium Substances 0.000 claims description 15
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 15
- 229910052782 aluminium Inorganic materials 0.000 claims description 15
- 230000003078 antioxidant effect Effects 0.000 claims description 14
- 239000000470 constituent Substances 0.000 claims description 13
- 229910052710 silicon Inorganic materials 0.000 claims description 13
- 239000010703 silicon Substances 0.000 claims description 13
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- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 7
- 239000006185 dispersion Substances 0.000 claims description 7
- 229910052593 corundum Inorganic materials 0.000 claims description 6
- 239000010431 corundum Substances 0.000 claims description 6
- 239000003595 mist Substances 0.000 claims description 6
- 239000011863 silicon-based powder Substances 0.000 claims description 6
- 239000002270 dispersing agent Substances 0.000 claims description 5
- -1 retardant Substances 0.000 claims description 4
- 229910021538 borax Inorganic materials 0.000 claims description 3
- 150000003016 phosphoric acids Chemical class 0.000 claims description 3
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 3
- 229920005646 polycarboxylate Polymers 0.000 claims description 3
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 3
- 239000004328 sodium tetraborate Substances 0.000 claims description 3
- 235000010339 sodium tetraborate Nutrition 0.000 claims description 3
- FAGUFWYHJQFNRV-UHFFFAOYSA-N tetraethylenepentamine Chemical compound NCCNCCNCCNCCN FAGUFWYHJQFNRV-UHFFFAOYSA-N 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 23
- 229910000831 Steel Inorganic materials 0.000 abstract description 9
- 239000010959 steel Substances 0.000 abstract description 9
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- 239000011819 refractory material Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 2
- 150000001875 compounds Chemical class 0.000 abstract 2
- 238000005422 blasting Methods 0.000 abstract 1
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 abstract 1
- 229910052594 sapphire Inorganic materials 0.000 abstract 1
- 239000000377 silicon dioxide Substances 0.000 abstract 1
- 229910001928 zirconium oxide Inorganic materials 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 56
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- Blast Furnaces (AREA)
Abstract
The invention discloses a large blast furnace swing spout. The large blast furnace swing spout comprises a steel mould, a brick layer, working layers and the prefabricated member; the steel mould and the brick layer respectively have two side faces and a bottom; the brick layer is paved in the steel mould; the working layers are poured on inner sides of the two side faces of the brick layer; and the prefabricated member is arranged on the bottom of the brick layer, and comprises the following components in percentage by mass: 50 to 55 percent of compact alumina or brown alumina, 18 to 22 percent of silicon carbide, 8 to 12 percent of white alumina, 6 to 9 percent of alpha-Al2O3 micropowder, 1 to 3 percent of silica micropowder, 2 to 4 percent of pure calcium aluminate cement, 1 to 5 percent of ball pitch, 2 to 4 percent of silicon metal powder, 1 to 1.5 percent of nano silica-alumina gel powder, 0.5 to 0.8 percent of boron nitride, 1 to 1.2 percent of yttrium oxide, 0.5 to 0.8 percent of zirconium oxide, 2 to 2.5 percent of compound additive and 0.3 to 0.5 percent of compound anti-blasting material. By the invention, the consumption of refractory materials and the labor intensity of workers are reduced, the service life of the whole swing spout is prolonged, and the economic benefit of a steel mill is improved.
Description
[technical field]
The present invention relates to the blast furnace ironmaking fire resisting material field, the fall improvement of iron section (or claim: the iron spot position falls) structure and prescription of especially a kind of large blast furnace swing spout.
[background technology]
In recent years, for responding national relevant energy-saving and emission-reduction requirement, newly-built blast furnace is in maximization, automation development, and the discharging, reduction blast-furnace man labour intensity, the raising production scene safety case that reduce obnoxious flavour also obtain extensive concern.This just so that, the every production, the construction technology process that comprise swinging flow jet are had higher requirement.
Present stage, the swinging flow jet main construction techniques was to adopt ramming mass or mould material integrated poured, when tapping a blast furnace, stored a certain amount of molten iron in the swinging flow jet, molten iron fallen to play certain shock absorption in the swinging flow jet.When needing to repair after the use, slag iron in the swinging flow jet is cleaned out, again swinging flow jet is carried out integral body and repair.The iron spot position is the main position of swinging flow jet wearing and tearing owing to fall, and other position wearing and tearing seldom, therefore greatly limited the whole service life of swinging flow jet, and needing that swinging flow jet is carried out integral body repairs, cause and repair frequently, labor strength is large, and refractory consumption is many.If it is improper to toast after repairing is finished, form easily crackle, normally tap a blast furnace for blast furnace and brought potential safety hazard.Also there is producer to make integral prefabricated of swinging flow jet on the present stage market, be characterized in that the replacing time short, but because volume is too large, install and change inconvenience, and when repair the iron spot position that falls, need to carry out whole repair maintenance or replacing to swinging flow jet, do not solve swinging flow jet iron spot position too short drawback duration of service that falls from root, and waste of material is larger.
Therefore, how to develop a kind of swinging flow jet iron spot position that falls and make construction and repairing technique, properly settle the swinging flow jet iron spot position rapid wear drawback that falls, thereby prolong the swinging flow jet whole service life, solving the contradiction that repairing and blast furnace are produced, is the key point of current swinging flow jet product technology upgrading, energy-saving and emission-reduction.
[summary of the invention]
Purpose of the present invention solves the problems of the prior art exactly, proposes a kind of large blast furnace swing spout, can reduce the consumption of refractory materials and workman's labour intensity, and can prolong the work-ing life of swinging flow jet integral body, improves the economic benefit of steel mill.
For achieving the above object, the present invention proposes a kind of large blast furnace swing spout, comprise punching block, brick layer, working lining and prefabricated component, described punching block and brick layer all have two sides and a bottom, and the brick layer is laid in the punching block, the inboard of two sides of brick layer is cast with working lining, the top, bottom of brick layer is placed with prefabricated component, and described prefabricated component comprises that following component and each constituent mass ratio are: compact alumina or brown corundum: 50-55 part, silicon carbide: 20-25 part, white fused alumina: 8-12 part, α-Al
2O
3Micro mist: 6-12 part, silicon powder: 1-3 part, pure calcium aluminate cement: 2-4 part, pelletted pitch: 1-5 part, metallic silicon power: 2-4 part, nanometer silicon aluminium gel powder: 1-1.5 part, boron nitride: 0.5-0.8 part, yttrium oxide: 1-1.2 part, zirconium white: 0.5-0.8 part, composite additive: 2-2.5 part, composite anti-explosion agent: 0.3-0.5 part.
As preferably, described composite additive is comprised of water reducer, retardant, dispersion agent, antioxidant and stiffening agent, and each constituent mass per-cent is: water reducer: 8%-10%, retardant: 15-20%, dispersant with high efficiency: 15-20%, antioxidant: 42-50%, stiffening agent: 8%-10%.
As preferably, described composite additive is by water reducer, retardant, dispersion agent, antioxidant and stiffening agent form, each constituent mass per-cent is: water reducer: 8%-10%, retardant: 15-20%, dispersant with high efficiency: 15-20%, antioxidant: 42-50%, stiffening agent: 8%-10%, described water reducer adopts polycarboxylate water-reducer, and retardant adopts phosphoric acid salt or borax, dispersion agent adopts sodium polyacrylate, antioxidant adopts norbide, and stiffening agent adopts tetraethylene pentamine, and described composite anti-explosion agent is comprised of organic fibre and metallic aluminium powder, each constituent mass per-cent is: organic special fibre: 40%-50%, metallic aluminium powder: 50%-60%.
As preferably, the upper surface of described prefabricated component is the arcuate structure of indent.
Beneficial effect of the present invention: the present invention is by the improvement of structure, having solved stem bar falls iron section rapid wear and causes frequent problem of repairing, prefabricated component is after production plant is pre-formed, the scene of transporting to can directly be installed and used, save cast-in-site and repaired time and storing time, repair with respect to original technique is whole, originally repairing once needs 6-8 consuming time hour (also not comprising storing time), only need to change now iron spot position prefabricated component, the time only needs about 2 hours, and need not toast, greatly shorten swinging flow jet and safeguarded the repairing time, guaranteed that blast furnace taps a blast furnace on schedule, need not that swinging flow jet is carried out integral body and repair, greatly reduced the consumption of material.Need not baking after replacing is finished can use, and has avoided the working-yard to cause potential safety hazard because toasting improper formation crackle.Reduced labor strength, can cut personnel about 1-2 people before the State of Blast Furnace, but each material saving 5-8 ton, saved materials in 1 year about 70 tons, estimate a year saving cost about 600,000, greatly improved the swinging flow jet whole service life, reduced the repairing frequency, reduce steel mill's production cost, improved steel mill's economic benefit.Prefabricated component of the present invention has better antiscour, slag corrosion resistance and antioxidant property, has greatly prolonged swinging flow jet and has fallen iron spot position work-ing life.
Feature of the present invention and advantage will be elaborated by reference to the accompanying drawings by embodiment.
[description of drawings]
Fig. 1 is the structural representation of a kind of large blast furnace swing spout of the present invention.
[embodiment]
As shown in Figure 1, a kind of large blast furnace swing spout, comprise punching block 1, brick layer 2, working lining 4 and prefabricated component 3, described punching block 1 and brick layer 2 all have two sides and a bottom, brick layer 2 is laid in the punching block 1, the inboard of two sides of brick layer 2 is cast with working lining 4, and the top, bottom of brick layer 2 is placed with prefabricated component 3.
The wearing and tearing of iron spot position are very fast because fall, and other position wearing and tearing are slower, integrated poured structure originally need to be carried out continually integral body and be repaired, time and material cost waste are serious, and the whole words that adopt prefabricated component 3, not only carrying and installation is inconvenient, but also is to need integral replacing, and waste of material is serious.The present invention iron spot position that will fall is improved to prefabricated component 3, and the cast structure is adopted in the side, prefabricated component 3 is pre-formed at production plant, the scene of transporting to can directly be installed and used, save cast-in-site and repaired time and storing time, repair with respect to original technique is whole, originally repairing once needs 6-8 consuming time hour (not comprising storing time), only need to change now iron spot position prefabricated component 3, the time only needs about 2 hours, and need not toast, greatly shorten swinging flow jet and safeguarded the repairing time, guaranteed that blast furnace taps a blast furnace on schedule, need not that swinging flow jet is carried out integral body and repair, greatly reduced the consumption of material.Need not baking after replacing is finished can use, avoided the working-yard to cause potential safety hazard because toasting improper formation crackle, the upper surface of prefabricated component 3 of the present invention is the arcuate structure of indent, widen the thickening design, increased swinging flow jet storage iron amount, increased molten iron whereabouts shock absorption, can significantly reduce molten iron washing away and wear and tear bottom of trench, having prolonged swinging flow jet falls iron spot position work-ing life, iron influx is than original ten thousand tons of 2-3 that improve, and each repair the basic swinging flow jet iron spot position prefabricated component 3 that falls that only needs to change, need not swinging flow jet is carried out integral body repairing, reduced labor strength, can cut personnel about 1-2 people before the State of Blast Furnace, but each material saving 5-8 ton was saved materials about 70 tons in 1 year, estimated a year saving cost about 600,000, greatly improved the swinging flow jet whole service life, reduce the repairing frequency, reduced steel mill's production cost, improved steel mill's economic benefit.
Be used for the fall prefabricated component 3 of iron section of large blast furnace swing spout, comprise that following component and each constituent mass per-cent are: compact alumina or brown corundum: 50-55 part, silicon carbide: 20-25 part, white fused alumina: 8-12 part, α-Al
2O
3Micro mist: 6-12 part, silicon powder: 1-3 part, pure calcium aluminate cement: 2-4 part, pelletted pitch: 1-5 part, metallic silicon power: 2-4 part, nanometer silicon aluminium gel powder: 1-1.5 part, boron nitride: 0.5-0.8 part, yttrium oxide: 1-1.2 part, zirconium white: 0.5-0.8 part, composite additive: 2-2.5 part, composite anti-explosion agent: 0.3-0.5 part.The hot strength of this mould material has improved 15%-20% than originally, anti-scour property has improved 20%-30%, and Comprehensive service life has improved 30%.Composite additive is comprised of water reducer, retardant, dispersion agent, antioxidant and stiffening agent, and each constituent mass per-cent is: water reducer: 8%-10%, retardant: 15-20%, dispersant with high efficiency: 15-20%, antioxidant: 42-50%, stiffening agent: 8%-10%.Described water reducer adopts polycarboxylate water-reducer, and retardant adopts phosphoric acid salt or borax, and dispersion agent adopts sodium polyacrylate, and antioxidant adopts norbide, and stiffening agent adopts tetraethylene pentamine.Described composite anti-explosion agent is comprised of organic fibre and metallic aluminium powder, and each constituent mass per-cent is: organic special fibre: 40%-50%, metallic aluminium powder: 50%-60%.High efficiency water reducing agent has simultaneously increases concrete strength and mobile effect.The concrete slump loss of mixing high efficiency water reducing agent is generally very fast, preferably adopts latter admixing method during construction, can improve the high efficiency water reducing agent water-reduction like this, makes concrete mobile increasing.When temperature was lower than 8～10 ℃, though high efficiency water reducing agent can increase workability, the effect of gaining in strength reduced greatly, so high efficiency water reducing agent should use in season in spring and autumn.Efficient retardation water reducing agent is conducive to control the early hydration of cement, makes mixing concrete thing little loss of slump.In general, corresponding growth time of coagulation when volume is large, but volume is crossed conference reduction early strength, usually adjusts volume according to construction seasons.Efficient retardation water reducing agent should use in the intensive member of summer or complex structure, arrangement of reinforcement, can avoid like this forming cold seam, the arrangement of convenient construction.Efficient early strength water-reducing agent generally uses in the winter time, can improve concrete early strength, wants prudent during use, because efficient early strength water-reducing agent can be accelerated the development of early strength, but post-strength of concrete generally can reduce.Checking work will be conscientiously carried out in the examination timing.By the research of theory of granulartity, adopt the particle multistage coupling, suitably increase Silicon carbide addition, improved slag resistance and the scour resistance of material; Add the sub-fraction yttrium oxide, boron nitride, zirconium white, to improve the high temperature anti-slag erosion performance of material, introduce the nanometer silicon aluminium gel powder and replace a part of pure calcium aluminate cement, to improve the hot strength of material, add the organic special fibre of sub-fraction and metallic aluminium powder and do the composite anti-explosion agent, it is about 7 microns that the organic fibre that the present invention adopts adopts fineness, fusing point is the organic special fibre about 80 ℃, than the general general fibre fineness (30 microns-40 microns) of using, fusing point (130 ℃-150 ℃) is thinner lower, and dispersed better, be uniformly dispersed in advance with metallic aluminium powder, when making material obtain more excellent explosion-proof performance, reduce the add-on of water, thereby improve the hot strength of material, solved the contradiction of material explosion-proof performance and use properties, by the research water reducer, dispersant with high efficiency, the adding mechanism of the relevant admixture such as antioxidant, select high-efficiency sclerosing agent and high efficiency water reducing agent, suppress mould material accumulation of salt in the surface soil efflorescence principle and accelerate the nuclear precipitation process according to it, improve the mould material hydration rate, reduce the material amount of water, improve liquidity can, improve the material early strength.The swinging flow jet that adopts this prescription the to make iron spot prefabricated component 3 that falls has better antiscour, and slag corrosion resistance and antioxidant property have greatly prolonged swinging flow jet and fallen iron spot position work-ing life.
Formulation Example one:
Be used for the fall prefabricated component 3 of iron section of large blast furnace swing spout, comprise that following component and each constituent mass per-cent are: compact alumina or brown corundum: 50 parts, silicon carbide: 20 parts, white fused alumina: 8 parts, α-Al
2O
3Micro mist: 6 parts, silicon powder: 3 parts, pure calcium aluminate cement: 2.5 parts, pelletted pitch: 1.4 parts, metallic silicon power: 3 parts, the nanometer silicon aluminium gel powder: 1.5 parts, boron nitride: 0.8 part, yttrium oxide: 1 part, zirconium white: 0.5 part, composite additive: 2 parts, the composite anti-explosion agent: 0.3 part, present embodiment is most preferred embodiment.
Formulation Example two:
Be used for the fall prefabricated component 3 of iron section of large blast furnace swing spout, comprise that following component and each constituent mass per-cent are: compact alumina or brown corundum: 52 parts, silicon carbide: 21 parts, white fused alumina: 9 parts, α-Al
2O
3Micro mist: 7 parts, silicon powder: 1 part, pure calcium aluminate cement: 2.5 parts, pelletted pitch: 1.2 parts, metallic silicon power: 2 parts, the nanometer silicon aluminium gel powder: 1.2 parts, boron nitride: 0.7 part, yttrium oxide: 1.1 parts, zirconium white: 0.7 part, composite additive: 2.2 parts, the composite anti-explosion agent: 0.4 part, this formulation cost is lower.
Formulation Example three:
Be used for the fall prefabricated component 3 of iron section of large blast furnace swing spout, comprise that following component and each constituent mass per-cent are: compact alumina or brown corundum: 51 parts, silicon carbide: 21 parts, white fused alumina: 9.3 parts, α-Al
2O
3Micro mist: 8.3 parts, silicon powder: 1 part, pure calcium aluminate cement: 3 parts, pelletted pitch: 1 part, metallic silicon power: 2 parts, the nanometer silicon aluminium gel powder: 1 part, boron nitride: 0.5 part, yttrium oxide: 1 part, zirconium white: 0.6 part, composite additive: 2 parts, the composite anti-explosion agent: 0.3 part, this prescription effect is better.
Above-described embodiment is to explanation of the present invention, is not limitation of the invention, any scheme after the simple transformation of the present invention is all belonged to protection scope of the present invention.
Claims (3)
1. large blast furnace swing spout, it is characterized in that: comprise punching block, brick layer, working lining and prefabricated component, described punching block and brick layer all have two sides and a bottom, the brick layer is laid in the punching block, and the inboard of two sides of brick layer is cast with working lining, and the top, bottom of brick layer is placed with prefabricated component, described prefabricated component comprises that following component and each constituent mass ratio are: compact alumina or brown corundum: 50-55 part, silicon carbide: 20-25 part, white fused alumina: 8-12 part, α-Al
2O
3Micro mist: 6-12 part, silicon powder: 1-3 part, pure calcium aluminate cement: 2-4 part, pelletted pitch: 1-5 part, metallic silicon power: 2-4 part, nanometer silicon aluminium gel powder: 1-1.5 part, boron nitride: 0.5-0.8 part, yttrium oxide: 1-1.2 part, zirconium white: 0.5-0.8 part, composite additive: 2-2.5 part, composite anti-explosion agent: 0.3-0.5 part.
2. a kind of large blast furnace swing spout as claimed in claim 1, it is characterized in that: described composite additive is by water reducer, retardant, dispersion agent, antioxidant and stiffening agent form, each constituent mass per-cent is: water reducer: 8%-10%, retardant: 15-20%, dispersant with high efficiency: 15-20%, antioxidant: 42-50%, stiffening agent: 8%-10%, described water reducer adopts polycarboxylate water-reducer, retardant adopts phosphoric acid salt or borax, dispersion agent adopts sodium polyacrylate, antioxidant adopts norbide, and stiffening agent adopts tetraethylene pentamine, and described composite anti-explosion agent is comprised of organic fibre and metallic aluminium powder, each constituent mass per-cent is: organic fibre: 40%-50%, metallic aluminium powder: 50%-60%.
3. a kind of large blast furnace swing spout as claimed in claim 1 or 2, it is characterized in that: the upper surface of described prefabricated component is the arcuate structure of indent.
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| CN 201210069206 CN102584304B (en) | 2012-03-15 | 2012-03-15 | Large blast furnace swing spout |
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| CN 201210069206 CN102584304B (en) | 2012-03-15 | 2012-03-15 | Large blast furnace swing spout |
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| CN112374871B (en) * | 2020-12-01 | 2022-11-01 | 上海宝九和耐火材料有限公司 | Anti-erosion castable for swing spout and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555152A (en) * | 2009-05-15 | 2009-10-14 | 佘成明 | Single iron-port blast furnace tapping main channel gunning material and gunning technology |
| CN102101784A (en) * | 2011-02-22 | 2011-06-22 | 佘成其 | Lightweight reformed main iron runner pouring material |
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2012
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101555152A (en) * | 2009-05-15 | 2009-10-14 | 佘成明 | Single iron-port blast furnace tapping main channel gunning material and gunning technology |
| CN102101784A (en) * | 2011-02-22 | 2011-06-22 | 佘成其 | Lightweight reformed main iron runner pouring material |
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| CN102584304A (en) | 2012-07-18 |
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