CN101880170A - Preparation method of low-density low-thermal conductivity wet spray heat insulating material - Google Patents
Preparation method of low-density low-thermal conductivity wet spray heat insulating material Download PDFInfo
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- CN101880170A CN101880170A CN 201010188595 CN201010188595A CN101880170A CN 101880170 A CN101880170 A CN 101880170A CN 201010188595 CN201010188595 CN 201010188595 CN 201010188595 A CN201010188595 A CN 201010188595A CN 101880170 A CN101880170 A CN 101880170A
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- China
- Prior art keywords
- heat insulating
- low
- thermal conductivity
- wet spray
- insulating material
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- 239000007921 spray Substances 0.000 title claims abstract description 24
- 239000011810 insulating material Substances 0.000 title claims abstract description 11
- 238000002360 preparation method Methods 0.000 title abstract description 3
- 238000000034 method Methods 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- 239000002994 raw material Substances 0.000 claims abstract description 7
- 239000004568 cement Substances 0.000 claims abstract description 5
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 5
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 4
- 239000010451 perlite Substances 0.000 claims abstract description 4
- 235000019362 perlite Nutrition 0.000 claims abstract description 4
- 239000010455 vermiculite Substances 0.000 claims abstract description 4
- 235000019354 vermiculite Nutrition 0.000 claims abstract description 4
- 229910052902 vermiculite Inorganic materials 0.000 claims abstract description 4
- 238000005507 spraying Methods 0.000 claims description 11
- 238000004519 manufacturing process Methods 0.000 claims description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000012467 final product Substances 0.000 claims description 2
- 239000006260 foam Substances 0.000 claims description 2
- 239000011863 silicon-based powder Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000003756 stirring Methods 0.000 claims description 2
- 238000005303 weighing Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 11
- 238000010276 construction Methods 0.000 abstract description 10
- 239000000919 ceramic Substances 0.000 abstract description 5
- 238000004523 catalytic cracking Methods 0.000 abstract description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000428 dust Substances 0.000 abstract description 3
- 230000000694 effects Effects 0.000 abstract description 3
- 238000007667 floating Methods 0.000 abstract description 2
- 239000011324 bead Substances 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 3
- 238000002156 mixing Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 239000003818 cinder Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000003562 lightweight material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052863 mullite Inorganic materials 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000009736 wetting Methods 0.000 description 1
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- Ceramic Products (AREA)
Abstract
The invention relates to a preparation method of low-density low-thermal conductivity wet spray heat insulating material, which belongs to the field of high-temperature fire-proof heat insulating material, and is characterized in that raw materials comprise shale ceramsite, perlite, floating bead, vermiculite, a hollow ball, high alumina cement, water retaining agent, water reducer and the like. The volume density is less than or equal to 0.5g/cm<3>, the thermal conductivity is less than or equal to 0.15W.m<-1>.K<-1> and the material has the heat insulating effect of a ceramic heat insulating board and other materials, and has no harm to human body. The invention has the advantages of developing the low-density low-thermal conductivity heat insulating material through a wet spray repairing method, has no harm to the human body, does not produce dust and improves the construction environment. The material can be widely applied to the heat insulating parts of blast furnaces, stoves, garbage incinerators, chimneys, catalytic cracking units and other thermal equipment.
Description
Technical field
The invention belongs to the high-temperature flame-proof field of heat insulating materials, particularly invented with the construction of wet spraying method, prepare a kind of extremely-low density, low-thermal conductivity wet spray heat insulating material, can be used for the adiabatic position of Thermal Equipments such as blast furnace, hotblast stove, incinerator, chimney, catalytic cracking unit.
Technical background
Ceramic beaverboard is because its good insulation effect has obtained application widely in high temperature industry adiabatic heat-insulation field.But because the ceramic series fiber that contains in the ceramic beaverboard is harmful to human body and environment, so its use is restricted.
Lightweight refractory is regarded as the desirable equivalent material of ceramic beaverboard, adopts the constructional method of smearing, pouring into a mould and spraying mostly.Because spraying application has operating efficiency height, characteristics such as easy to operate, has obtained certain popularization.Wherein Lightweight Spray Refractory is the indefinite form heat preserving and insulating material by material preparations such as aglite, wedding agent, additive and fine powders.Compare with lagging materials such as light cinder brick, refractory fibres, because of it has that production technique is simple, easy construction (need not template), good integrity, save energy, advantage such as with low cost rapidly, and be widely used in blast furnace, hotblast stove, incinerator, chimney, catalytic cracking unit etc.Especially for specificity structure,, adopt Lightweight Spray Refractory more can embody its superiority as positions such as major diameter bend pipe (upcast, downtake, level pipe), zigzag rule type bend, flat-tops.
Traditional lightweight spray material constructional method is to adopt the semidrying construction.Hu Sihai etc. adopt the semidrying spraying, promptly earlier spray material is added the wetting mixing of less water (5～10%) to not having floating ash and airborne dust in forced stirrer, the positive delivery in the spraying machine hopper of more mixed material being packed into, adjust the water yield and hydraulic pressure at nozzle side pipe place and spray, prepare with the pearlstone be aggregate oven dry volume density general 〉=0.8g/cm
3Lightweight Spray Refractory and adopt the high-alumina lightening porous clinker be aggregate volume density general 〉=1.6/cm
3Middle lightweight Lightweight Spray Refractory.Li Caixias etc. have been developed volume density at 1.10～1.20g/cm with semidrying
3Lightweight Spray Refractory, its proportioning raw materials is: haydites of book structure (5～3mm) 5～15%, (3～1mm) 15%～30%, light-weight mullite aggregate (1～0mm) 20～40%, microballon 5～10%, less than the fine powder 30～40% of 0.088mm, all the other admixtures 0.2～0.5%.At heat insulation positions such as incinerator combustion chambers, Krosaki Harima Corporation adopts semidrying to prepare a kind of incinerator low density, ultralight matter insulating refractory (volume density≤0.5g/cm
3, thermal conductivity≤0.12W.m-1.K-1).
But, adopt semi dry gunning working-yard dust bigger, environmental pollution is serious, the health of harmful to human, but also it is inhomogeneous to exist pug to mix, and is easy to generate problems such as segregation and construction body heterogeneity.And adopt new wet spray operating technique can not only improve construction environment, and can guarantee the uniformity of construction body to have vast market prospect.
But constructional method with respect to semi dry gunning, but wet spraying require to mix pug have pump-conveying property preferably, certain engineering time and the good pug of this workability after pumping, also to have can the moment cohesion characteristic etc., thereby the reasonable use of raw material type, grain size distribution and admixture in the material mixture ratio etc. had higher requirement.Especially to light heat-insulating material close at low body, ultra-low thermal conductivity, more to pass through choose reasonable aglite, cement kind, admixture etc., but but the pumping and spraying property that could realize mixing pug.Therefore, be subjected to the restriction of reasons such as the more and spraying equipment of technological development difficult point costs an arm and a leg, the wet spray technology is less in China's high temperature sector application, especially in the ultralight matter insulating refractory spray material of water content in (mass percent) more than 100%, does not appear in the newspapers.
Summary of the invention
The objective of the invention is to adopt the constructional method of wet spraying, develop a kind of Thermal Equipments such as blast furnace, hotblast stove, incinerator, chimney, catalytic cracking unit low density, low-thermal conductivity wet spray insulating refractory (volume density≤0.5g/cm of being widely used in
3, thermal conductivity≤0.12W.m-1.K-1), improve construction environment, harmless.
The lightweight material that the present invention selects for use by haydites of book structure, perlite, float pearl, vermiculite, hollow ball, high-alumina cement, water-holding agent and water reducer etc. and form.
The manufacture method of a kind of low density, low-thermal conductivity wet spray heat insulating material, the concrete implementation step of the present invention is by following proportioning, the various refractory raw materials of weighing, through the wet spray machine carry forced stirrer stir after the water yield of 100～130% mass percents (and add), mixed pug is poured in the spraying machine store holder, open the wet spray pump and send system, pug is delivered to rifle head position, by pressurized air pug is sprayed onto desired area and gets final product through steel pipe and rubber tubing.
Refractory raw material granularity (mm) mass content (%)
Haydite 3-0 0～10
Vermiculite 1-0 0～15
Perlite＜0.5 20～35
Gently float pearl 15～30
Silicon powder 95 0～8
Cement 20～40
Water reducer 0～0.5
Water-holding agent 0～0.5
Retardant 0～0.1
Foam ball 2-0 100～300ml (adding).
Low density, the low-thermal conductivity wet spray thermal insulation material of the present invention's exploitation, not only the operating efficiency height is harmless, do not send out dirt, improved construction environment, and, construction body uniformity is good, and result of use is good, has the adiabatic heat insulating effect of material such as heat-insulating shield.
Embodiment
The embodiment example sees Table 1.
Claims (1)
1. the manufacture method of a low density, low-thermal conductivity wet spray heat insulating material, it is characterized in that by the various refractory raw materials of following proportioning weighing, after the wet spray machine carries the forced stirrer stirring, and add the water yield of 100～130% mass percents, mixed pug is poured in the spraying machine store holder, open the wet spray pump and send system, pug is delivered to rifle head position, by pressurized air pug is sprayed onto desired area and gets final product through steel pipe and rubber tubing;
Refractory raw material granularity (mm) mass content (%)
Haydite 3-0 0～10
Vermiculite 1-0 0～15
Perlite＜0.5 20～35
Gently float pearl 15～30
Silicon powder 95 0～8
Cement 20～40
Water reducer 0～0.5
Water-holding agent 0～0.5
Retardant 0～0.1
Add foam ball 2-0 100～300ml.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010188595 CN101880170A (en) | 2010-05-24 | 2010-05-24 | Preparation method of low-density low-thermal conductivity wet spray heat insulating material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010188595 CN101880170A (en) | 2010-05-24 | 2010-05-24 | Preparation method of low-density low-thermal conductivity wet spray heat insulating material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101880170A true CN101880170A (en) | 2010-11-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010188595 Pending CN101880170A (en) | 2010-05-24 | 2010-05-24 | Preparation method of low-density low-thermal conductivity wet spray heat insulating material |
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| CN (1) | CN101880170A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102485685A (en) * | 2010-12-02 | 2012-06-06 | 上海梅山钢铁股份有限公司 | Low thermal conductivity lightweight coating |
| CN103804003A (en) * | 2014-02-24 | 2014-05-21 | 宜兴瑞泰耐火材料有限公司 | High-strength thermal insulation wear-resistant castable for catalytic cracking device |
| CN106565254A (en) * | 2016-10-26 | 2017-04-19 | 武汉钢铁股份有限公司 | Refractory castable for producing air blowing assisted slagging-off spray gun |
| 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 |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916086A (en) * | 2006-08-29 | 2007-02-21 | 泰州五行涂料有限公司 | Tunnel fireproof coating and preparation method thereof |
-
2010
- 2010-05-24 CN CN 201010188595 patent/CN101880170A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1916086A (en) * | 2006-08-29 | 2007-02-21 | 泰州五行涂料有限公司 | Tunnel fireproof coating and preparation method thereof |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102485685A (en) * | 2010-12-02 | 2012-06-06 | 上海梅山钢铁股份有限公司 | Low thermal conductivity lightweight coating |
| CN102485685B (en) * | 2010-12-02 | 2014-02-26 | 上海梅山钢铁股份有限公司 | Low thermal conductivity lightweight coating |
| CN103804003A (en) * | 2014-02-24 | 2014-05-21 | 宜兴瑞泰耐火材料有限公司 | High-strength thermal insulation wear-resistant castable for catalytic cracking device |
| CN103804003B (en) * | 2014-02-24 | 2016-08-24 | 宜兴瑞泰耐火材料有限公司 | A kind of catalytic cracking unit high-strength heat-insulating wear-resistant castable |
| CN106565254A (en) * | 2016-10-26 | 2017-04-19 | 武汉钢铁股份有限公司 | Refractory castable for producing air blowing assisted slagging-off spray gun |
| CN106565254B (en) * | 2016-10-26 | 2020-04-03 | 武汉钢铁有限公司 | Refractory castable for preparing blowing-assisted slagging-off spray gun |
| 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: 20101110 |