CN115448735A - High-temperature unshaped nano refractory heat-insulating material and preparation method thereof - Google Patents
High-temperature unshaped nano refractory heat-insulating material and preparation method thereof Download PDFInfo
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- 239000011810 insulating material Substances 0.000 title claims abstract description 22
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 40
- 239000000843 powder Substances 0.000 claims abstract description 27
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 20
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 17
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 12
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 12
- 239000006004 Quartz sand Substances 0.000 claims abstract description 10
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims abstract description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 10
- 239000010451 perlite Substances 0.000 claims abstract description 10
- 235000019362 perlite Nutrition 0.000 claims abstract description 10
- 235000019353 potassium silicate Nutrition 0.000 claims abstract description 10
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 claims abstract description 10
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000292 calcium oxide Substances 0.000 claims abstract description 6
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000395 magnesium oxide Substances 0.000 claims abstract description 6
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 claims abstract description 6
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 6
- 239000000835 fiber Substances 0.000 claims abstract description 5
- 239000002994 raw material Substances 0.000 claims abstract description 4
- 239000002969 artificial stone Substances 0.000 claims abstract description 3
- 238000000227 grinding Methods 0.000 claims abstract description 3
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 3
- 239000000203 mixture Substances 0.000 claims description 35
- 238000003825 pressing Methods 0.000 claims description 19
- 238000000748 compression moulding Methods 0.000 claims description 7
- 238000000462 isostatic pressing Methods 0.000 claims description 7
- 239000002105 nanoparticle Substances 0.000 claims description 7
- 238000004806 packaging method and process Methods 0.000 claims description 7
- 239000002245 particle Substances 0.000 claims description 7
- 239000004033 plastic Substances 0.000 claims description 7
- 238000003756 stirring Methods 0.000 claims description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 2
- 239000012774 insulation material Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 abstract description 15
- 230000007774 longterm Effects 0.000 abstract description 10
- 239000011449 brick Substances 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 239000004568 cement Substances 0.000 description 6
- 239000000919 ceramic Substances 0.000 description 5
- 238000009413 insulation Methods 0.000 description 5
- 238000005272 metallurgy Methods 0.000 description 5
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- -1 petrifaction Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
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Abstract
The invention discloses a high-temperature amorphous nano fireproof heat-insulating material and a preparation method thereof, and the high-temperature amorphous nano fireproof heat-insulating material comprises 10-40% of nano silicon dioxide, 5-25% of nano quartz sand, 10-45% of nano aluminum hydroxide, 15-80% of nano artificial powder, 20-40% of water glass, 5-15% of perlite, 15-70% of nano calcium carbonate and 2-10% of an inorganic forming agent; the nanometer artificial powder is artificial stone powder with high temperature resistance and weather resistance, and is prepared by homogenizing and grinding magnesium oxide and calcium oxide in water, wherein the weight ratio of the magnesium oxide to the calcium oxide to the water is 20: 15: 350; the inorganic forming agent is high silica chopped fiber. Has the advantages that: the raw materials in the invention are easy to obtain, the preparation process is simple, the construction is convenient, the industrialized production and application are convenient, the long-term hot-face use temperature of the material can reach 1100-1300 ℃, the material is an indefinite material at normal temperature, and the material can also be made into the shape of a plate, a brick or a strip, so that the nano fireproof heat-insulating material can be widely applied to thermal equipment.
Description
Technical Field
The invention relates to the technical field of refractory heat-insulating materials, in particular to a high-temperature unshaped nano refractory heat-insulating material and a preparation method thereof.
Background
The nanometer fireproof heat-insulating material is applied in the fields of steel, petrifaction, cement and the like at present, and has the biggest characteristic of low heat conductivity coefficient (lower than static air) at normal temperature and very good heat-insulating effect by very thin thickness.
However, its wide use at present has a great limitation.
One of the main reasons is that the long-term hot-face use temperature of the material is not high and generally can not exceed 750 ℃, and when the long-term hot-face use temperature exceeds 750 ℃, the heat conductivity coefficient of the material can be rapidly increased, and the decay rate of the heat preservation performance is increased. The method is very difficult to apply to some thermal equipment with high use temperature (such as the use temperature inside a heating furnace in the steel industry is about 1250 ℃).
Secondly, the existing nanometer refractory materials are mainly spliced on thermal equipment in the shapes of plates, bricks or strips and the like, and under the use occasions of hanging bricks, burners, special-shaped parts and the like, splicing construction is difficult, cracks are easy to occur at the spliced part, the sealing performance is poor, and red leakage and fuel leakage even occur in severe cases.
Disclosure of Invention
The invention aims to solve the problems and provide a high-temperature amorphous nano refractory heat-insulating material.
The invention realizes the purpose through the following technical scheme:
a high-temperature unshaped nano refractory heat-insulating material is prepared from the following raw materials in parts by weight: 10-40% of nano silicon dioxide, 5-25% of nano quartz sand, 10-45% of nano aluminum hydroxide, 15-80% of nano artificial powder, 20-40% of water glass, 5-15% of perlite, 15-70% of nano calcium carbonate and 2-10% of inorganic forming agent; the nano artificial powder is artificial stone powder with high temperature resistance and weather resistance, and is prepared by homogenizing and grinding magnesium oxide and calcium oxide in water, wherein the weight ratio of the magnesium oxide to the calcium oxide to the water is 20: 15: 350; the inorganic forming agent is high silica chopped fiber.
Further, the diameter size of the inorganic forming agent is 10-15 μm.
Further, the chopped fiber length of the inorganic forming agent is 3-5mm.
Furthermore, the particle size of the nano silicon dioxide particle fine powder is 5-15nm.
Furthermore, the particle size of the nano alumina fine powder is 5-15nm.
The invention also provides a preparation method for preparing the high-temperature amorphous nano refractory heat-insulating material, which comprises the following steps:
s1, preparing a nanoparticle fine powder mixture: sequentially adding 10-40% of nano silicon dioxide, 5-25% of nano quartz sand, 10-45% of nano aluminum hydroxide, 15-80% of nano artificial powder, 20-40% of water glass, 5-15% of perlite, 15-70% of nano calcium carbonate and 2-10% of inorganic forming agent into a high-speed stirrer, and stirring at the speed of 1500-2500r/min for 30 min-50 min for later use;
s2, compression molding of the mixture: the stirred nano mixture is firstly put into a disposable plastic bag and then put into an isostatic pressing machine for pressing and forming, so as to ensure the uniform pressed density, and the density after pressing is 0.4-0.7g/cm 3 ；
S3, low-speed scattering of the mixture subjected to pre-pressing forming: putting the pre-pressed mixture into a low-speed scattering machine, operating at the speed of 200-500r/min for 10-15min, and packaging.
The invention has the beneficial effects that: the raw materials in the invention are easy to obtain, the preparation process is simple, the construction is convenient, the industrialized production and application are convenient, the long-term hot-face use temperature of the material can reach 1100-1300 ℃, the material is an indefinite material at normal temperature, and the material can also be made into the shape of a plate, a brick or a strip, so that the nano fireproof heat-insulating material can be widely applied to thermal equipment.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
s1, preparing a nanoparticle fine powder mixture: sequentially adding 10% of nano silicon dioxide, 5% of nano quartz sand, 10% of nano aluminum hydroxide, 15% of nano artificial powder, 20% of water glass, 5% of perlite, 15% of nano calcium carbonate and 2% of inorganic forming agent into a high-speed stirrer, and stirring for 30min at the speed of 1500r/min for later use;
s2, compression molding of the mixture: the stirred nano mixture is firstly put into a disposable plastic bag and then put into an isostatic pressing machine for pressing and forming, so that the pressed density is ensured to be uniform, and the density after pressing is 0.4g/cm 3 ；
S3, low-speed scattering of the mixture subjected to pre-pressing forming: and putting the pre-pressed mixture into a low-speed scattering machine, operating at the speed of 200r/min for 10min, and packaging.
The product can be used as a heat insulation layer material around furnace tops, side walls, burners and special-shaped parts of various thermal equipment in the fields of metallurgy, ceramics, cement, building and the like, wherein the long-term hot surface use temperature is less than or equal to 1100 ℃. The heat-insulating material has the characteristics of low heat conductivity coefficient, high use temperature, difficult attenuation of heat-insulating property and long service life.
Example 2:
s1, preparing a nano-particle fine powder mixture: sequentially adding 20% of nano silicon dioxide, 15% of nano quartz sand, 25% of nano aluminum hydroxide, 30% of nano artificial powder, 30% of water glass, 10% of perlite, 30% of nano calcium carbonate and 5% of inorganic forming agent into a high-speed stirrer, and stirring for 30min at the speed of 1500r/min for later use;
s2, compression molding of the mixture: the stirred nano mixture is firstly put into a disposable plastic bag and then put into an isostatic pressing machine for pressing and forming, so that the pressed density is ensured to be uniform, and the density after pressing is 0.4g/cm 3 ；
S3, low-speed scattering of the pre-pressed mixture: and (3) putting the pre-pressed mixture into a low-speed scattering machine, operating at the speed of 300r/min for 10min, and packaging.
The product can be used as a heat insulation layer material around various thermal equipment furnace tops, side walls, burners and special-shaped parts in the fields of metallurgy, ceramics, cement, building and the like, wherein the long-term hot surface use temperature is less than or equal to 1200 ℃. The heat-insulating material has the characteristics of low heat conductivity coefficient, high use temperature, difficult attenuation of heat-insulating property and long service life.
Example 3:
s1, preparing a nanoparticle fine powder mixture: adding 30% of nano silicon dioxide, 25% of nano quartz sand, 35% of nano aluminum hydroxide, 40% of nano artificial powder, 40% of water glass, 20% of perlite, 35% of nano calcium carbonate and 8% of inorganic forming agent into a high-speed stirrer in sequence, and stirring for 40min at the speed of 2500r/min for later use;
s2, compression molding of the mixture: the stirred nano mixture is firstly put into a disposable plastic bag and then put into an isostatic pressing machine for pressing and forming, so that the pressed density is ensured to be uniform, and the density after pressing is 0.5g/cm 3 ；
S3, low-speed scattering of the mixture subjected to pre-pressing forming: and putting the pre-pressed mixture into a low-speed scattering machine, operating at the speed of 500r/min for 20min, and packaging.
The product can be used as a heat insulation layer material around various thermal equipment furnace tops, side walls, burners and special-shaped parts in the fields of metallurgy, ceramics, cement, building and the like, wherein the long-term hot surface use temperature is less than or equal to 1150 ℃. The heat-insulating material has the characteristics of low heat conductivity coefficient, high use temperature, difficult attenuation of heat-insulating property and long service life.
Example 4:
s1, preparing a nano-particle fine powder mixture: adding 40% of nano silicon dioxide, 25% of nano quartz sand, 45% of nano aluminum hydroxide, 80% of nano artificial powder, 40% of water glass, 15% of perlite, 70% of nano calcium carbonate and 10% of inorganic forming agent into a high-speed stirrer in sequence, and stirring for 50min at the speed of 2500r/min for later use;
s2, compression molding of the mixture: the stirred nano mixture is firstly put into a disposable plastic bag and then put into an isostatic pressing machine for pressing and forming, the pressed density is ensured to be uniform, and the density after pressing is 0.7g/cm 3 ；
S3, low-speed scattering of the mixture subjected to pre-pressing forming: and (3) putting the pre-pressed mixture into a low-speed scattering machine, operating at the speed of 500r/min for 15min, and packaging.
The product can be used as a heat insulation layer material around various thermal equipment furnace tops, side walls, burners and special-shaped parts in the fields of metallurgy, ceramics, cement, building and the like, wherein the long-term hot surface use temperature is less than or equal to 1200 ℃. The heat-insulating material has the characteristics of low heat conductivity coefficient, high use temperature, difficult attenuation of heat-insulating property and long service life.
Example 5:
s1, preparing a nanoparticle fine powder mixture: adding 30% of nano silicon dioxide, 5-25% of nano quartz sand, 35% of nano aluminum hydroxide, 60% of nano artificial powder, 30% of water glass, 15% of perlite, 65% of nano calcium carbonate and 8% of inorganic forming agent into a high-speed stirrer in sequence, and stirring for 30-50 min at the speed of 2000r/min for later use;
s2, compression molding of the mixture: the stirred nano mixture is firstly put into a disposable plastic bag and then put into an isostatic pressing machine for pressing and forming, so that the pressed density is ensured to be uniform, and the density after pressing is 0.7g/cm 3 ；
S3, low-speed scattering of the mixture subjected to pre-pressing forming: and putting the pre-pressed mixture into a low-speed scattering machine, operating at the speed of 500r/min for 15min, and packaging.
The product can be used as a heat insulation layer material around various thermal equipment furnace tops, side walls, burners and special-shaped parts in the fields of metallurgy, ceramics, cement, building and the like, wherein the long-term hot surface use temperature is less than or equal to 1200 ℃. The heat-insulating material has the characteristics of low heat conductivity coefficient, high use temperature, difficult attenuation of heat-insulating property and long service life.
In examples 1 to 5, the density of the high-temperature amorphous nano refractory insulation material: 0.4-0.7g/cm3; the heat conductivity coefficient is 0.048-0.06W/mK (average at 350 ℃); the long-term hot surface use temperature is 1100-1300 ℃; the compressive strength after firing at 900 ℃ is more than or equal to 1-3MPa.
The foregoing shows and describes the general principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (6)
1. The high-temperature unshaped nano refractory heat-insulating material is characterized by being prepared from the following raw materials in parts by weight: 10-40% of nano silicon dioxide, 5-25% of nano quartz sand, 10-45% of nano aluminum hydroxide, 15-80% of nano artificial powder, 20-40% of water glass, 5-15% of perlite, 15-70% of nano calcium carbonate and 2-10% of inorganic forming agent; the nano artificial powder is artificial stone powder with high temperature resistance and weather resistance, and is prepared by homogenizing and grinding magnesium oxide and calcium oxide in water, wherein the weight ratio of the magnesium oxide to the calcium oxide to the water is 20: 15: 350; the inorganic forming agent is high silica chopped fiber.
2. The high-temperature unshaped nanometer refractory heat-insulating material as claimed in claim 1, characterized in that: the diameter of the inorganic forming agent is 10-15 μm.
3. The high-temperature unshaped nanometer refractory heat-insulating material as claimed in claim 1, characterized in that: the chopped fiber length of the inorganic forming agent is 3-5mm.
4. The high-temperature unshaped nanometer refractory heat-insulating material as claimed in claim 1, characterized in that: the particle size of the fine powder of the nano silicon dioxide particles is 5-15nm.
5. The high-temperature unshaped nano refractory and heat-insulating material as claimed in claim 1, wherein: the particle size of the nanometer alumina particle fine powder is 5-15nm.
6. A preparation method for preparing the high-temperature amorphous nano refractory insulation material as claimed in any one of claims 1 to 5 is characterized in that: the method comprises the following steps:
s1, preparing a nano-particle fine powder mixture: sequentially adding 10-40% of nano silicon dioxide, 5-25% of nano quartz sand, 10-45% of nano aluminum hydroxide, 15-80% of nano artificial powder, 20-40% of water glass, 5-15% of perlite, 15-70% of nano calcium carbonate and 2-10% of inorganic forming agent into a high-speed stirrer, and stirring at the speed of 1500-2500r/min for 30 min-50 min for later use;
s2, compression molding of the mixture: the stirred nano mixture is firstly put into a disposable plastic bag and then put into an isostatic pressing machine for pressing and forming, so as to ensure the uniform pressed density, and the density after pressing is 0.4-0.7g/cm 3 ；
S3, low-speed scattering of the pre-pressed mixture: putting the mixture into a low-speed beater, running at 200-500r/min for 10-15min, and packaging.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103606410A (en) * | 2013-12-06 | 2014-02-26 | 上海特种电线电缆（集团）有限公司 | Nanometer type ultra-A-class fire-resistant control cable |
| CN103641502A (en) * | 2013-12-06 | 2014-03-19 | 上海特种电线电缆（集团）有限公司 | Nanoscale fireproof material |
| CN111960812A (en) * | 2020-08-30 | 2020-11-20 | 洛阳欧斯特节能科技有限公司 | High-temperature unshaped nano refractory heat-insulating material and preparation method thereof |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103606410A (en) * | 2013-12-06 | 2014-02-26 | 上海特种电线电缆（集团）有限公司 | Nanometer type ultra-A-class fire-resistant control cable |
| CN103641502A (en) * | 2013-12-06 | 2014-03-19 | 上海特种电线电缆（集团）有限公司 | Nanoscale fireproof material |
| CN111960812A (en) * | 2020-08-30 | 2020-11-20 | 洛阳欧斯特节能科技有限公司 | High-temperature unshaped nano refractory heat-insulating material and preparation method thereof |
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