CN103880451A - Swing spout castable for blast furnace and preparation process thereof - Google Patents
Swing spout castable for blast furnace and preparation process thereof Download PDFInfo
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- CN103880451A CN103880451A CN201410122399.0A CN201410122399A CN103880451A CN 103880451 A CN103880451 A CN 103880451A CN 201410122399 A CN201410122399 A CN 201410122399A CN 103880451 A CN103880451 A CN 103880451A
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Abstract
The invention discloses a swing spout castable for blast furnace and a preparation process thereof. The swing spout castable comprises the following components in mass ratio: 20-30 parts of alumina, 5-10 parts of bauxite powder, 25-35 parts of mullite particle, 5-10 parts of mullite powder, 5-10 parts of tabular corundum, 4-8 parts of activated alumina powder, 4-8 parts of silica powder, 1-4 parts of steel fiber, 2-5 parts of silica sol, 1-3 parts of fused MgO powder, 3-8 parts of polycarboxylate superplasticizer, 0.5-2 parts of detonation inhibitor which is a mixture of an azodicarbonamide foaming agent, aluminum lactate and polypropylene fiber, and 0.5-1 part of antioxidant. According to the swing spout castable, carbon-contained components such as brown fused alumina, silicon carbide and asphalt in a conventional swing spout castable are omitted, oxidization is prevented; mullite with low thermal expansivity is introduced and a mullite phase is formed in a substrate so as to reinforce thermal shock resistance and improve high temperature bending strength; compared with the prior art, the swing spout castable has better oxidation resistance, explosion-proof performance and high-temperature strength.
Description
[technical field]
The present invention relates to technical field of refractory materials, be specifically related to a kind of blast furnace swing spout mould material and preparation technology thereof.
[background technology]
Before State of Blast Furnace, before not implementing desilication process, swinging flow jet mould material is Al2O3-SiC-C matter mould material liner.After the desiliconization of stokehold, the breakage of swinging flow jet liner is very serious, significantly decline the work-ing life of swinging flow jet, the major way of analyzing its damage has: the impact of (1) molten iron is deteriorated: because the hot strength of Al2O3-SiC-C material is lower, the ability of opposing molten iron high temperature impact a little less than, causing deteriorating very fast, is the main damage form of this material, (2) thermal shocking of circulation: cause material structure strength decreased, (3) oxidation damage: the SiC of this system material and C component are easy to oxidized, especially the oxidation of C component, cause material structure loose, strength degradation, it is the main reason of this system material damage, simultaneously the swinging flow jet of prior art with detonation suppressor in mould material still take interpolation aluminium powder as main, owing to being subject to the kind of aluminium powder, fineness, addition, the impact of the factor such as construction environment and curing temperature, the mould material that makes to add metallic aluminium produce time of hydrogen and amount number uncontrollable, can produce and bubble, the problems such as micro mist floating, when serious, will there is crack or blast slump.
[summary of the invention]
Object of the present invention solves the problems of the prior art exactly, proposes a kind of blast furnace swing spout mould material and preparation technology thereof, can meet the service requirements of swinging flow jet in current desilication process, improve hot strength, save conventional carbon component, strengthen oxygen-proof property, and improve explosion-proof performance.
For achieving the above object, the present invention proposes a kind of blast furnace swing spout mould material, comprise that following component and each constituent mass ratio are: alumina: 20～30 parts, alumine fine powder: 5～10 parts, mullite particle: 25～35 parts, mullite fine powder: 5～10 parts, plate diamond spar: 5～10 parts, active oxidation aluminium powder: 4～8 parts, silicon powder: 4～8 parts, steel fiber: 1～4 part, silicon sol: 2～5 parts, electric smelting Mg0 fine powder: 1～3 part; High-efficiency water-reducing agent of poly-carboxylic acid: 3～8 parts, the detonation suppressor being mixed by azodicarbonamide foaming agent, Aluctyl and polypropylene fibre: 0.5～2 part, oxidation inhibitor: 0.5～1 part.
As preferably, described mullite particle is that 5～7mm part, particle diameter are that 3～5mm part, particle diameter are that 1～3mm part and particle diameter < 1mm part form by particle diameter, and in mullite particle, particle diameter is that 5～7mm part, particle diameter are that 3～5mm part, particle diameter are that the mass ratio of 1～3mm part and particle diameter < 1mm part is 1:2:3:2.
As preferably, in described detonation suppressor, the mass ratio of azodicarbonamide foaming agent, Aluctyl and polypropylene fibre is 3:6:1.
As preferably, described oxidation inhibitor is metallic silicon power.
For achieving the above object, the invention allows for a kind of preparation technology of blast furnace swing spout mould material, comprise the steps:
A) be that 5～7mm, 3～5mm, 1～3mm and < 1mm carry out level Four screening by mullite particle by particle diameter, after having screened, be that 5～7mm part, particle diameter are that 3～5mm part, particle diameter are that 1～3mm part and particle diameter < 1mm part mix by the mass ratio of 1:2:3:2 by particle diameter, take 25～35 parts;
B) take 20～30 parts of alumina, 5～10 parts of alumine fine powders, 5～10 parts of mullite fine powders, 5～10 parts of plate diamond spars, 1～4 part of steel fiber is with 4～8 parts of active oxidation aluminium powders and throw in to whipping appts and stir mixing in 10～15 minutes together with the mullite particle taking in step a);
C) take 2～5 parts of silicon sol, 1～3 part of electric smelting Mg0 fine powder and 4～8 parts of silicon powders carry out pre-mixing in mixing device, throw in to the whipping appts described in step b) and continue to stir 10～15 minutes after pre-mixing;
D) azodicarbonamide foaming agent, Aluctyl and polypropylene fibre are thrown in to mixing device and carried out pre-mixing by the mass ratio of 3:6:1, after having stirred, take 0.5～2 part and throw in to the whipping appts described in step c);
E) taking 0.5～1 part of metallic silicon power throws in to continuing to stir in the whipping appts described in step d) and within 20～30 minutes, obtains finished product as oxidation inhibitor and 3～8 parts of high-efficiency water-reducing agent of poly-carboxylic acid;
F) by the finished product sampling observation in e) step, qualified finished product packing warehouse-in after sampling observation.
As preferably, the pre-mixing time of described step c) is 8～12 minutes.
As preferably, the pre-mixing time of described step d) is 4～8 minutes.
Beneficial effect of the present invention: the present invention saves brown corundum in traditional wobble stem bar mould material, the carbonaceous component such as silicon carbide and pitch, prevent oxidized, introduce the mullite that coefficient of thermal expansion is lower and in matrix, form mullite thing and strengthen mutually thermal shock resistance, improve high temperature break resistant intensity, adopt high-efficiency water-reducing agent of poly-carboxylic acid, amount of water is effectively controlled, improve the flowing property of mould material, increase the compactness of mould material, normal temperature and hot strength are further improved, contribute to regulate construction and the demould time of mould material, select mixing detonation suppressor, effectively preventing the even explosion of mould material generation crackle, compared with prior art, the present invention has better oxygen-proof property, explosion-proof and hot strength.
[embodiment]
Blast furnace swing spout mould material of the present invention, comprise that following component and each constituent mass ratio are: alumina: 20～30 parts, alumine fine powder: 5～10 parts, mullite particle: 25～35 parts, mullite fine powder: 5～10 parts, plate diamond spar: 5～10 parts, active oxidation aluminium powder: 4～8 parts, silicon powder: 4～8 parts, steel fiber: 1～4 part, silicon sol: 2～5 parts, electric smelting Mg0 fine powder: 1～3 part, high-efficiency water-reducing agent of poly-carboxylic acid: 3～8 parts, by azodicarbonamide foaming agent, the detonation suppressor that Aluctyl and polypropylene fibre mix: 0.5～2 part, oxidation inhibitor: 0.5～1 part, described mullite particle is 5～7mm part by particle diameter, particle diameter is 3～5mm part, particle diameter is 1～3mm part and particle diameter < 1mm part composition, in mullite particle, particle diameter is 5～7mm part, particle diameter is 3～5mm part, particle diameter is that the mass ratio of 1～3mm part and particle diameter < 1mm part is 1:2:3:2, azodicarbonamide foaming agent in described detonation suppressor, the mass ratio of Aluctyl and polypropylene fibre is 3:6:1, described oxidation inhibitor is metallic silicon power.
The present invention saves the carbonaceous component such as brown corundum, silicon carbide and pitch in traditional wobble stem bar mould material, prevent oxidized, introduce the mullite that coefficient of thermal expansion is lower and in matrix, form mullite thing and strengthen mutually thermal shock resistance, improve high temperature break resistant intensity, the present invention adopts silicon powder, mainly due to the Si-OH key (silica gel) forming after silicon powder surface hydration, dehydration post polymerization and form the micro mist reticulate chain structure firmly being closed by Si-OH bond bonding strength is provided.But only adopt silicon powder to make bonding agent, the intensity of sample is lower, so introduce electric smelting Mg0 fine powder, rely on the acting in conjunction of the cohesion of Si02 micro mist and Mg0 fine powder aquation to realize the setting and harden of mould material, and be that Coagulating binding take silicon powder is as main, the Hydraulic binding of Mg0 fine powder is auxiliary, and the air-strength of mould material and baked strength are strengthened.The present invention adopts silicon sol to replace traditional fine aluminium acid salt cement, and silicon sol is a kind of colloidal solution, odorless, nontoxic, oyster white translucent liquid.Silicon sol is the disperse phase of nano level silica dioxide granule in water, and water is dispersion medium, mostly stable existence in alkaline environment.This nano level Si02 colloidal particle have very high chemically reactive and good aggregation.Si02 in colloid is a kind of spheroidal particle of negative charge, is easy to disperse, and order surface exists the light base of undersaturated residual bond and different bond styles, shows extremely strong activity, can be miscible with organic polymer.Mullite is that a series of mineral that are made up of aluminosilicate are referred to as, these class mineral are more rare, mullite is the mineral that aluminosilicate at high temperature generates, when Heat artificially aluminosilicate, can form mullite, natural mullite crystal is elongated needle-like and is radiation bunch shape, be used to produce high-temperature refractory, by adopting high-efficiency water-reducing agent of poly-carboxylic acid, mix water demand ratio ordinary water-reducing agent has reduced more than 1%, amount of water reduces the flowing property of having improved mould material, increase the compactness of mould material, normal temperature and the hot strength of mould material are improved, simultaneously this water reducer add the construction and the demould time that contribute to regulate mould material, solve winter low temperature environment construction difficult problem,
The preparation technology of blast furnace swing spout mould material of the present invention, comprises the steps:
A) be that 5～7mm, 3～5mm, 1～3mm and < 1mm carry out level Four screening by mullite particle by particle diameter, after having screened, be that 5～7mm part, particle diameter are that 3～5mm part, particle diameter are that 1～3mm part and particle diameter < 1mm part mix by the mass ratio of 1:2:3:2 by particle diameter, take 25～35 parts;
B) take 20～30 parts of alumina, 5～10 parts of alumine fine powders, 5～10 parts of mullite fine powders, 5～10 parts of plate diamond spars, 1～4 part of steel fiber is with 4～8 parts of active oxidation aluminium powders and throw in to whipping appts and stir mixing in 10～15 minutes together with the mullite particle taking in step a);
C) take 2～5 parts of silicon sol, 1～3 part of electric smelting Mg0 fine powder and 4～8 parts of silicon powders carry out pre-mixing in 8～12 minutes in mixing device, throw in to the whipping appts described in step b) and continue to stir 10～15 minutes after pre-mixing;
D) azodicarbonamide foaming agent, Aluctyl and polypropylene fibre are thrown in to mixing device and carried out pre-mixing in 4～8 minutes by the mass ratio of 3:6:1, after having stirred, take 0.5～2 part and throw in to the whipping appts described in step c);
E) taking 0.5～1 part of metallic silicon power throws in to continuing to stir in the whipping appts described in step d) and within 20～30 minutes, obtains finished product as oxidation inhibitor and 3～8 parts of high-efficiency water-reducing agent of poly-carboxylic acid;
F) by the finished product sampling observation in e) step, qualified finished product packing warehouse-in after sampling observation.
Specific embodiments of the invention are:
Embodiment 1:
Above-mentioned each constituent mass ratio is: alumina: 20 parts, and alumine fine powder: 5 parts, mullite particle: 25 parts, mullite fine powder: 5 parts, plate diamond spar: 5 parts, active oxidation aluminium powder: 4 parts, silicon powder: 4 parts, steel fiber: 1 part, silicon sol: 2 parts, electric smelting Mg0 fine powder: 1 part; High-efficiency water-reducing agent of poly-carboxylic acid: 3 parts, the detonation suppressor being mixed by azodicarbonamide foaming agent, Aluctyl and polypropylene fibre: 0.5 part, oxidation inhibitor: 0.5 part.
Embodiment 2:
Above-mentioned each constituent mass ratio is: alumina: 25 parts, and 8 parts of alumine fine powders, mullite particle: 30 parts, mullite fine powder: 7 parts, plate diamond spar: 8 parts, active oxidation aluminium powder: 6 parts, silicon powder: 6 parts, steel fiber: 2 parts, silicon sol: 3 parts, electric smelting Mg0 fine powder: 2 parts; High-efficiency water-reducing agent of poly-carboxylic acid: 5 parts, the detonation suppressor being mixed by azodicarbonamide foaming agent, Aluctyl and polypropylene fibre: 1 part, oxidation inhibitor: 0.8 part.
Embodiment 3:
Above-mentioned each constituent mass ratio is: alumina: 30 parts, and alumine fine powder: 10 parts, mullite particle: 35 parts, mullite fine powder: 10 parts, plate diamond spar: 10 parts, active oxidation aluminium powder: 8 parts, silicon powder: 8 parts, steel fiber: 4 parts, silicon sol: 5 parts, electric smelting Mg0 fine powder: 3 parts; High-efficiency water-reducing agent of poly-carboxylic acid: 8 parts, the detonation suppressor being mixed by azodicarbonamide foaming agent, Aluctyl and polypropylene fibre: 2 parts, oxidation inhibitor: 1 part.
Above-described embodiment is to explanation of the present invention, is not limitation of the invention, any scheme after simple transformation of the present invention is all belonged to protection scope of the present invention.
Claims (7)
1. a blast furnace swing spout mould material, it is characterized in that: comprise that following component and each constituent mass ratio are: alumina: 20～30 parts, alumine fine powder: 5～10 parts, mullite particle: 25～35 parts, mullite fine powder: 5～10 parts, plate diamond spar: 5～10 parts, active oxidation aluminium powder: 4～8 parts, silicon powder: 4～8 parts, steel fiber: 1～4 part, silicon sol: 2～5 parts, electric smelting Mg0 fine powder: 1～3 part; High-efficiency water-reducing agent of poly-carboxylic acid: 3～8 parts, the detonation suppressor being mixed by azodicarbonamide foaming agent, Aluctyl and polypropylene fibre: 0.5～2 part, oxidation inhibitor: 0.5～1 part.
2. a kind of blast furnace swing spout mould material as claimed in claim 1, it is characterized in that: described mullite particle is that 5～7mm part, particle diameter are that 3～5mm part, particle diameter are that 1～3mm part and particle diameter < 1mm part form by particle diameter, in mullite particle, particle diameter is that 5～7mm part, particle diameter are that 3～5mm part, particle diameter are that the mass ratio of 1～3mm part and particle diameter < 1mm part is 1:2:3:2.
3. a kind of blast furnace swing spout mould material as claimed in claim 1, is characterized in that: in described detonation suppressor, the mass ratio of azodicarbonamide foaming agent, Aluctyl and polypropylene fibre is 3:6:1.
4. a kind of blast furnace swing spout mould material as claimed in claim 1, is characterized in that: described oxidation inhibitor is metallic silicon power.
5. a preparation technology for blast furnace swing spout mould material, is characterized in that: comprise the steps:
A) be that 5～7mm, 3～5mm, 1～3mm and < 1mm carry out level Four screening by mullite particle by particle diameter, after having screened, be that 5～7mm part, particle diameter are that 3～5mm part, particle diameter are that 1～3mm part and particle diameter < 1mm part mix by the mass ratio of 1:2:3:2 by particle diameter, take 25～35 parts;
B) take 20～30 parts of alumina, 5～10 parts of alumine fine powders, 5～10 parts of mullite fine powders, 5～10 parts of plate diamond spars, 1～4 part of steel fiber is with 4～8 parts of active oxidation aluminium powders and throw in to whipping appts and stir mixing in 10～15 minutes together with the mullite particle taking in step a);
C) take 2～5 parts of silicon sol, 1～3 part of electric smelting Mg0 fine powder and 4～8 parts of silicon powders carry out pre-mixing in mixing device, throw in to the whipping appts described in step b) and continue to stir 10～15 minutes after pre-mixing;
D) azodicarbonamide foaming agent, Aluctyl and polypropylene fibre are thrown in to mixing device and carried out pre-mixing by the mass ratio of 3:6:1, after having stirred, take 0.5～2 part and throw in to the whipping appts described in step c);
E) taking 0.5～1 part of metallic silicon power throws in to continuing to stir in the whipping appts described in step d) and within 20～30 minutes, obtains finished product as oxidation inhibitor and 3～8 parts of high-efficiency water-reducing agent of poly-carboxylic acid;
F) by the finished product sampling observation in e) step, qualified finished product packing warehouse-in after sampling observation.
6. the preparation technology of a kind of blast furnace swing spout mould material as claimed in claim 5, is characterized in that: the pre-mixing time of described step c) is 8～12 minutes.
7. the preparation technology of a kind of blast furnace swing spout mould material as claimed in claim 5, is characterized in that: the pre-mixing time of described step d) is 4～8 minutes.
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Cited By (9)
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| CN104370561A (en) * | 2014-11-06 | 2015-02-25 | 朱小英 | Tundish castable |
| CN104370560A (en) * | 2014-11-06 | 2015-02-25 | 朱小英 | Method for preparing tundish castable |
| CN104761266A (en) * | 2015-03-16 | 2015-07-08 | 通达耐火技术股份有限公司 | Quick-baking anti-explosion iron runner castable and use method thereof |
| CN106699205A (en) * | 2016-12-26 | 2017-05-24 | 中国京冶工程技术有限公司 | Sol-bonded wet-process spray coating for blast furnace lining and preparation method of sol-bonded wet spray coating |
| CN106702056A (en) * | 2016-11-28 | 2017-05-24 | 浙江锦诚新材料股份有限公司 | Iron tap channel swing spout prefabricated piece and manufacturing method thereof |
| CN110342949A (en) * | 2019-08-12 | 2019-10-18 | 武汉市科达耐火有限责任公司 | Swinging sliding nozzle Anti-cracking castable and pouring technology |
| CN112028647A (en) * | 2020-08-25 | 2020-12-04 | 贵阳明通炉料有限公司 | High-performance sialon corundum plastic material and preparation method thereof |
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| CN104370560A (en) * | 2014-11-06 | 2015-02-25 | 朱小英 | Method for preparing tundish castable |
| CN104370561B (en) * | 2014-11-06 | 2016-08-17 | 朱小英 | A kind of basket pouring material |
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| CN106702056A (en) * | 2016-11-28 | 2017-05-24 | 浙江锦诚新材料股份有限公司 | Iron tap channel swing spout prefabricated piece and manufacturing method thereof |
| CN106699205A (en) * | 2016-12-26 | 2017-05-24 | 中国京冶工程技术有限公司 | Sol-bonded wet-process spray coating for blast furnace lining and preparation method of sol-bonded wet spray coating |
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| CN113924200A (en) * | 2019-04-12 | 2022-01-11 | 碳化混凝土公司 | Carbonation curing process for producing wet cast slag based concrete products |
| CN113924200B (en) * | 2019-04-12 | 2023-08-29 | 碳化混凝土公司 | Carbonation curing method for producing wet cast slag based concrete products |
| CN110342949A (en) * | 2019-08-12 | 2019-10-18 | 武汉市科达耐火有限责任公司 | Swinging sliding nozzle Anti-cracking castable and pouring technology |
| CN110342949B (en) * | 2019-08-12 | 2021-10-26 | 武汉市科达耐火有限责任公司 | Crack-resistant castable for swinging spout and pouring process |
| CN112028647A (en) * | 2020-08-25 | 2020-12-04 | 贵阳明通炉料有限公司 | High-performance sialon corundum plastic material and preparation method thereof |
| CN115611615A (en) * | 2022-09-20 | 2023-01-17 | 中冶武汉冶金建筑研究院有限公司 | Novel high-alumina slurry and use method thereof |
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