CN103396130A - Hot-blast furnace pipeline spray paint and application method thereof - Google Patents

Hot-blast furnace pipeline spray paint and application method thereof Download PDF

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Publication number
CN103396130A
CN103396130A CN2013103156464A CN201310315646A CN103396130A CN 103396130 A CN103396130 A CN 103396130A CN 2013103156464 A CN2013103156464 A CN 2013103156464A CN 201310315646 A CN201310315646 A CN 201310315646A CN 103396130 A CN103396130 A CN 103396130A
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China
Prior art keywords
parts
pipeline
hot air
air furnace
spray material
Prior art date
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Withdrawn
Application number
CN2013103156464A
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Chinese (zh)
Inventor
常正钦
李新明
王琪
佘春萍
彭晶晶
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ZHEJIANG JINCHENG REFRACTORIES CO Ltd
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ZHEJIANG JINCHENG REFRACTORIES CO Ltd
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Priority to CN2013103156464A priority Critical patent/CN103396130A/en
Publication of CN103396130A publication Critical patent/CN103396130A/en
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Abstract

The invention relates to a hot-blast furnace pipeline spray paint and an application method thereof, belonging to the field of refractory castables. The hot-blast furnace pipeline spray paint comprises the following components in parts by weight: 40-60 parts of light-weight clay brick, 3-9 parts of perlite, 10-20 parts of high-alumina cement, 20-30 parts of mullite, 5-8 parts of bentonite, 1-3 parts of dextrin powder, 2-6 parts of hydrated alumina, 5-10 parts of organic fiber, 8-18 parts of water glass, 4-9 parts of aluminum dihydrogen phosphate and 10-15 parts of magnesite powder. The spray paint provided by the invention is quick and practical to use, does not need special curing, and has favorable thermal shock resistance.

Description

A kind of pipeline of hot air furnace spray material and using method thereof
Technical field
The present invention relates to a kind of pipeline of hot air furnace spray material and using method thereof, belong to the refractory castable field.
Background technology
Hotblast stove is to be heated to the Thermal Equipment of high temperature by normal temperature with blasting the combustion-supporting air of blast furnace.Be fuel with blast furnace gas and coke-oven gas, with air heating to 1300 ℃ left and right.Pipeline of hot air furnace is the equipment of carrying high-temperature hot-air, requires high temperature resistant.In addition, although improve wind-warm syndrome, can save coke and the coal of ironmaking use, improve pig iron yield reducation operation of blast furnace cost,, after improving wind-warm syndrome, airborne N 2And O 2NO is produced in reaction XAmount also increases greatly, NO XArrive the box hat place by the hotblast stove refractory materials, after running into water vapor, produce nitric acid, nitric acid can cause the corrosion of box hat, causes cracking.Therefore the pipeline of hot air furnace liner often adopts mould material opposing high temperature gas flow to wash away and realize the purpose of heat insulating, the refractory castable that has adopted has clayey, High-Alumina, mullite etc., these materials have used for many years, met from different degree the requirement of using, but still exist the high problem of surface temperature at present, the airduct temperature reaches 300-350 ℃, therefore wastes energy and makes blast furnace production operation environment variation, in addition, hot air duct formwork, casting and constructing difficulty.
CN102060499B (2012-10-24) discloses a kind of iron-smelting blast furnace hotblast stove acidproof paint compoistion and method of use, yet needs the time of maintenance long when said composition is used, and is generally more than 3 days, and practicality and heat-shock resistance still remain to be improved.
Summary of the invention
The purpose of this invention is to provide a kind of fast, practical, the pipeline of hot air furnace spray material that need not special curing, good thermal shock.
Above-mentioned technical purpose of the present invention is achieved by the following technical programs:
A kind of pipeline of hot air furnace spray material, it comprises the component of following parts by weight: lightweight clay brick 40-60 part, perlite 3-9 part, high-alumina cement 10-20 part, mullite 20-30 part, wilkinite 5-8 part, dextrine powder 1-3 part, hydrated aluminum oxide 2-6 part, organic fibre 5-10 part, water glass 8-18 part, aluminium dihydrogen phosphate 4-9 part, magnesia powder 10-15 part.
Advantage of the present invention is:
1. take waste light clay brick, perlite, high-alumina cement, mullite as main raw material, by adding wilkinite, dextrine powder, hydrated aluminum oxide and organic fibre Substitute For Partial wedding agent and adhesive agent, improve the properties such as adhesive rate, cohesiveness and plasticity of spray material, and by suitable quantity of water glass, aluminium dihydrogen phosphate and magnesia powder and all the other compositions, play synergistic function, further improve the cohesiveness of spray material, promote condensing and sclerosis of cement, reduce the bounce-back rate, improve sample intensity and thermal shock resistance;
2. pipeline of the present invention has following principal feature: A, quick, practical with spray material, with traditional building method, compares, and economic benefit can significantly improve.B, duration short (one hour can 10 tons of left and right of spray repair), fast drying (just sclerosis in 30 minutes), need not special curing (maintenance in 24 hours, original mould material took maintenance 3-7 days), can be rapidly heated.C, spraying coating process on quality and life cycle, meet national energy-saving environmental protection policy (thermal conductivity is low, and heat insulation effect, than common mould material 30% left and right, has reduced the energy consumption of pipeline of hot air furnace).D. good thermal shock (there is no obvious crackle in the time of use).
Due to the perlite lighter weight, in order to prevent from spraying time bounce-back, the ratio of perlite and lightweight clay brick must strict control.
As preferably, described mullite is the M45 mullite.
As preferably, the alumina content in described lightweight clay brick is 35%-45%.
As preferably, the dioxide-containing silica in described perlite is 55-65%.
As preferably, the alumina content in described high-alumina cement is 40-50%.
As preferably, the granularity of described lightweight clay brick, perlite, high-alumina cement or M45 mullite is 0.4-0.8mm.
As preferably, described organic fibre is flaxen fiber or viscose fiber.
As preferably, described pipeline of hot air furnace spray material comprises the component of following parts by weight: lightweight clay brick 45-55 part, perlite 5-8 part, high-alumina cement 15-18 part, mullite 22-25 part, wilkinite 5-8 part, dextrine powder 1-3 part, hydrated aluminum oxide 2-6 part, organic fibre 5-10 part, water glass 12-16 part, aluminium dihydrogen phosphate 4-9 part, magnesia powder 10-15 part.
As preferably, also comprise 4-8 weight part aluminum oxide and silicon dioxide gel composite suspension liquid in described pipeline of hot air furnace spray material, described aluminum oxide and silicon dioxide gel mix by the 1:1 weight ratio.
The present invention makes nano-grade ceramic binding agent by aluminum oxide and silicon dioxide gel composite suspension liquid, directly join in the pipeline of hot air furnace spray material that compositions such as adopting lightweight clay brick and perlite are mixed into, pass through in-situ synthesized reaction, form nano-structured matrix, made the pipeline of hot air furnace spray material of the compound oxidate ceramic combination of this product, make that spray material high volume stability is strong, thermal shock resistance is high, longer service life.
As preferably, also comprise the mixture of 0.2-0.8 part tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 in described pipeline of hot air furnace spray material, described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 7:3 weight ratio.
The tripoly phosphate sodium STPP of the specific proportioning of the present invention and the mixture of Sodium hexametaphosphate 99 make the volume density of product reduce as retardant, thermal conductivity reduces, better heat preservation, also improved simultaneously the yield point value of mould material, reduce again the usage quantity of colloidal sol, also improved the thermal shock resistance of mould material.
The present invention also provides the using method of described pipeline of hot air furnace spray material, comprises step:
A. prepare burden: then the clay brick of weighing lightweight by weight 40-60 part, perlite 3-9 part, high-alumina cement 10-20 part, mullite 20-30 part, wilkinite 5-8 part, dextrine powder 1-3 part, hydrated aluminum oxide 2-6 part, organic fibre 5-10 part, water glass 8-18 part, aluminium dihydrogen phosphate 4-9 part, magnesia powder 10-15 part add water uniform stirring 8-12min;
B. construction: spraying application, smear construction or vibration construction; Described vibration construction is that mould is placed on shaking table, to the batching that adds in mould after stirring, Vibration on Start-up platform vibration 3-5min;
C. dry: seasoning sclerosis in 25-40 minute;
D. maintenance: natural curing 20-28 hour.
As preferably, also add 4-8 weight part aluminum oxide and silicon dioxide gel composite suspension liquid in described steps A, described aluminum oxide and silicon dioxide gel mix by the 1:1 weight ratio.
As preferably, also add the mixture of 0.2-0.8 part tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 in described steps A, described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 7:3 weight ratio.
Embodiment
The pipeline of hot air furnace spray material fills a prescription one, comprises the component of following parts by weight:
40 parts of lightweight clay bricks; Wherein alumina content is 35%;
3 parts of perlites, dioxide-containing silica are 55%;
10 parts of high-alumina cements, alumina content are 40%;
20 parts of M45 mullites;
Wherein the granularity of lightweight clay brick, perlite, high-alumina cement or M45 mullite is 0.4mm;
5 parts of wilkinites;
1 part of dextrine powder;
2 parts of hydrated aluminum oxides;
5 parts, flaxen fiber
8 parts of water glass;
4 parts of aluminium dihydrogen phosphates;
10 parts of magnesia powders.
The pipeline of hot air furnace spray material fills a prescription two, comprises the component of following parts by weight:
60 parts of lightweight clay bricks; Wherein alumina content is 45%;
9 parts of perlites, dioxide-containing silica are 65%;
20 parts of high-alumina cements, alumina content are 50%;
30 parts of M45 mullites;
Wherein the granularity of lightweight clay brick, perlite, high-alumina cement or M45 mullite is 0.8mm;
8 parts of wilkinites;
3 parts of dextrine powders;
6 parts of hydrated aluminum oxides;
10 parts of viscose fibers
18 parts of water glass;
9 parts of aluminium dihydrogen phosphates;
15 parts of magnesia powders.
The pipeline of hot air furnace spray material fills a prescription three, comprises the component of following parts by weight:
45 parts of lightweight clay bricks; Wherein alumina content is 40%;
6 parts of perlites, dioxide-containing silica are 55%;
15 parts of high-alumina cements, alumina content are 40%;
22 parts of M45 mullites;
Wherein the granularity of lightweight clay brick, perlite, high-alumina cement or M45 mullite is 0.6mm;
5 parts of wilkinites;
1 part of dextrine powder;
2 parts of hydrated aluminum oxides;
5 parts, flaxen fiber
12 parts of water glass;
4 parts of aluminium dihydrogen phosphates;
10 parts of magnesia powders;
4 weight part aluminum oxide and silicon dioxide gel composite suspension liquid, wherein aluminum oxide and silicon dioxide gel mix by the 1:1 weight ratio.
The pipeline of hot air furnace spray material fills a prescription four, comprises the component of following parts by weight:
55 parts of lightweight clay bricks; Wherein alumina content is 35%-45%;
5 parts of perlites, dioxide-containing silica are 55-65%;
18 parts of high-alumina cements, alumina content are 40-50%;
25 parts of M45 mullites;
Wherein the granularity of lightweight clay brick, perlite, high-alumina cement or M45 mullite is 0.8mm;
8 parts of wilkinites;
3 parts of dextrine powders;
6 parts of hydrated aluminum oxides;
10 parts, flaxen fiber
16 parts of water glass;
9 parts of aluminium dihydrogen phosphates;
15 parts of magnesia powders;
8 weight part aluminum oxide and silicon dioxide gel composite suspension liquid, wherein aluminum oxide and silicon dioxide gel mix by the 1:1 weight ratio.
The pipeline of hot air furnace spray material fills a prescription five, comprises the component of following parts by weight:
45 parts of lightweight clay bricks; Wherein alumina content is 40%;
8 parts of perlites, dioxide-containing silica are 55%;
15 parts of high-alumina cements, alumina content are 40%;
22 parts of M45 mullites;
Wherein the granularity of lightweight clay brick, perlite, high-alumina cement or M45 mullite is 0.6mm;
5 parts of wilkinites;
1 part of dextrine powder;
2 parts of hydrated aluminum oxides;
5 parts, flaxen fiber
12 parts of water glass;
4 parts of aluminium dihydrogen phosphates;
10 parts of magnesia powders;
0.2 the mixture of part tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 7:3 weight ratio.
The pipeline of hot air furnace spray material fills a prescription six, comprises the component of following parts by weight:
55 parts of lightweight clay bricks; Wherein alumina content is 35%-45%;
6 parts of perlites, dioxide-containing silica are 55-65%;
18 parts of high-alumina cements, alumina content are 40-50%;
25 parts of M45 mullites;
Wherein the granularity of lightweight clay brick, perlite, high-alumina cement or M45 mullite is 0.8mm;
8 parts of wilkinites;
3 parts of dextrine powders;
6 parts of hydrated aluminum oxides;
10 parts, flaxen fiber
16 parts of water glass;
9 parts of aluminium dihydrogen phosphates;
15 parts of magnesia powders;
0.8 the mixture of part tripoly phosphate sodium STPP and Sodium hexametaphosphate 99, described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 7:3 weight ratio.
Embodiment one
Use formula one batching, add water uniform stirring 8min, spraying application then, seasoning sclerosis in 25 minutes; Natural curing 20 hours.Present method can need not formwork, fast spraying, and acid resistance is good, and heat insulation effect is better, and cost is also lower simultaneously.Design parameter is in Table 1.
Embodiment two
Use formula two batchings, add water uniform stirring 12min, spraying application then, seasoning sclerosis in 40 minutes; Natural curing 28 hours.
Embodiment three
Use formula three batchings, add water uniform stirring 10min, then smear construction, seasoning sclerosis in 30 minutes; Natural curing 24 hours.
Embodiment four
Use formula four batchings, add water uniform stirring 10min, then smear construction, seasoning sclerosis in 30 minutes; Natural curing 24 hours.
Embodiment five
Use formula five batchings, add water uniform stirring 10min, then vibration construction, specifically be placed in mould on shaking table, to the batching that adds in mould after stirring, Vibration on Start-up platform vibration 3min; Then seasoning sclerosis in 30 minutes; Natural curing 24 hours.
 
Embodiment six
Use formula six batchings, add water uniform stirring 10min, then vibration construction, specifically be placed in mould on shaking table, to the batching that adds in mould after stirring, Vibration on Start-up platform vibration 5min; Then seasoning sclerosis in 30 minutes; Natural curing 24 hours.
The comparative example one
In spray material, each component formula is 30 parts of lightweight clay bricks, 30 parts of perlites, 5 parts of high-alumina cements, 40 parts of mullites, 10 parts of wilkinites, 5 parts of dextrine powders, 1 part of hydrated aluminum oxide, 10 parts of water glass, 5 parts of aluminium dihydrogen phosphates, 8 parts of magnesia powders.During use, the effect of direct spraying is bad, and needs the time needs 3 days of maintenance.
The comparative example two
70 parts of lightweight clay bricks, 10 parts of perlites, 5 parts of high-alumina cements, 40 parts, brown corundum, 10 parts of water glass, 5 parts of aluminium dihydrogen phosphates, 8 parts of magnesia powders.During use, the effect of direct spraying is bad, and needs the time needs 4 days of maintenance.
Table 1 embodiment and comparative example's product performance relatively
This specific embodiment is only explanation of the invention; it is not limitation of the present invention; those skilled in the art can make to the present embodiment the modification that there is no creative contribution as required after reading this specification sheets, but as long as all are subject to the protection of patent law in claim scope of the present invention.

Claims (10)

1. pipeline of hot air furnace spray material, it is characterized in that: it comprises the component of following parts by weight: lightweight clay brick 40-60 part, perlite 3-9 part, high-alumina cement 10-20 part, mullite 20-30 part, wilkinite 5-8 part, dextrine powder 1-3 part, hydrated aluminum oxide 2-6 part, organic fibre 5-10 part, water glass 8-18 part, aluminium dihydrogen phosphate 4-9 part, magnesia powder 10-15 part.
2. a kind of pipeline of hot air furnace spray material according to claim 1, it is characterized in that: described mullite is the M45 mullite.
3. a kind of pipeline of hot air furnace spray material according to claim 2, it is characterized in that: the alumina content in described lightweight clay brick is 35%-45%.
4. a kind of pipeline of hot air furnace spray material according to claim 3, it is characterized in that: the dioxide-containing silica in described perlite is 55-65%.
5. a kind of pipeline of hot air furnace spray material according to claim 4, it is characterized in that: the alumina content in described high-alumina cement is 40-50%.
6. according to claim 1-5 described a kind of pipeline of hot air furnace spray materials of any one, it is characterized in that: the granularity of described lightweight clay brick, perlite, high-alumina cement or M45 mullite is 0.4-0.8mm.
7. a kind of pipeline of hot air furnace spray material according to claim 6, it is characterized in that: described organic fibre is flaxen fiber or viscose fiber.
8. a kind of pipeline of hot air furnace spray material according to claim 7, it is characterized in that: also comprise 4-8 weight part aluminum oxide and silicon dioxide gel composite suspension liquid in described pipeline of hot air furnace spray material, described aluminum oxide and silicon dioxide gel mix by the 1:1 weight ratio.
9. a kind of pipeline of hot air furnace spray material according to claim 8, it is characterized in that: also comprise the mixture of 0.2-0.8 part tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 in described pipeline of hot air furnace spray material, described tripoly phosphate sodium STPP and Sodium hexametaphosphate 99 mix by the 7:3 weight ratio.
10. the using method of according to claim 1-9 described a kind of pipeline of hot air furnace spray materials of any one is characterized in that comprising successively step:
A. prepare burden: then the clay brick of weighing lightweight by weight 40-60 part, perlite 3-9 part, high-alumina cement 10-20 part, mullite 20-30 part, wilkinite 5-8 part, dextrine powder 1-3 part, hydrated aluminum oxide 2-6 part, organic fibre 5-10 part, water glass 8-18 part, aluminium dihydrogen phosphate 4-9 part, magnesia powder 10-15 part add water uniform stirring 8-12min;
B. construction: spraying application, smear construction or vibration construction; Described vibration construction is that mould is placed on shaking table, to the batching that adds in mould after stirring, Vibration on Start-up platform vibration 3-5min;
C. dry: seasoning sclerosis in 25-40 minute;
D. maintenance: natural curing 20-28 hour.
CN2013103156464A 2013-07-25 2013-07-25 Hot-blast furnace pipeline spray paint and application method thereof Withdrawn CN103396130A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN2013103156464A CN103396130A (en) 2013-07-25 2013-07-25 Hot-blast furnace pipeline spray paint and application method thereof

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CN103396130A true CN103396130A (en) 2013-11-20

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105152631A (en) * 2015-08-28 2015-12-16 兆山科技(北京)有限公司 Ceramic paint and application thereof
CN109650937A (en) * 2018-12-29 2019-04-19 安徽工业大学 A kind of water-permeable brick of wind quenching steel slag sintering
CN111018547A (en) * 2019-11-07 2020-04-17 浙江锦诚新材料股份有限公司 Light spray coating for blast furnace taphole smoke hood

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105152631A (en) * 2015-08-28 2015-12-16 兆山科技(北京)有限公司 Ceramic paint and application thereof
CN109650937A (en) * 2018-12-29 2019-04-19 安徽工业大学 A kind of water-permeable brick of wind quenching steel slag sintering
CN111018547A (en) * 2019-11-07 2020-04-17 浙江锦诚新材料股份有限公司 Light spray coating for blast furnace taphole smoke hood
CN111018547B (en) * 2019-11-07 2022-01-28 浙江锦诚新材料股份有限公司 Light spray coating for blast furnace taphole smoke hood

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Application publication date: 20131120