CN115745634A - Refractory heat-insulating material and preparation method thereof - Google Patents
Refractory heat-insulating material and preparation method thereof Download PDFInfo
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- CN115745634A CN115745634A CN202211499968.4A CN202211499968A CN115745634A CN 115745634 A CN115745634 A CN 115745634A CN 202211499968 A CN202211499968 A CN 202211499968A CN 115745634 A CN115745634 A CN 115745634A
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- 239000011810 insulating material Substances 0.000 title claims abstract description 76
- 238000002360 preparation method Methods 0.000 title abstract description 22
- 239000002775 capsule Substances 0.000 claims abstract description 126
- 241000193830 Bacillus <bacterium> Species 0.000 claims abstract description 73
- MKJXYGKVIBWPFZ-UHFFFAOYSA-L calcium lactate Chemical compound [Ca+2].CC(O)C([O-])=O.CC(O)C([O-])=O MKJXYGKVIBWPFZ-UHFFFAOYSA-L 0.000 claims abstract description 50
- 229960002401 calcium lactate Drugs 0.000 claims abstract description 50
- 239000001527 calcium lactate Substances 0.000 claims abstract description 50
- 235000011086 calcium lactate Nutrition 0.000 claims abstract description 50
- 239000004927 clay Substances 0.000 claims abstract description 50
- 239000000835 fiber Substances 0.000 claims abstract description 39
- 239000010893 paper waste Substances 0.000 claims abstract description 39
- 239000000440 bentonite Substances 0.000 claims abstract description 24
- 229910000278 bentonite Inorganic materials 0.000 claims abstract description 24
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000002270 dispersing agent Substances 0.000 claims abstract description 24
- 239000004576 sand Substances 0.000 claims abstract description 24
- 239000002002 slurry Substances 0.000 claims description 52
- 238000003756 stirring Methods 0.000 claims description 45
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 41
- LRHPLDYGYMQRHN-UHFFFAOYSA-N N-Butanol Chemical compound CCCCO LRHPLDYGYMQRHN-UHFFFAOYSA-N 0.000 claims description 33
- 239000012528 membrane Substances 0.000 claims description 29
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 claims description 24
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 24
- NLXLAEXVIDQMFP-UHFFFAOYSA-N Ammonia chloride Chemical compound [NH4+].[Cl-] NLXLAEXVIDQMFP-UHFFFAOYSA-N 0.000 claims description 20
- 238000000034 method Methods 0.000 claims description 18
- 244000063299 Bacillus subtilis Species 0.000 claims description 15
- 235000014469 Bacillus subtilis Nutrition 0.000 claims description 15
- 238000002156 mixing Methods 0.000 claims description 12
- 238000004321 preservation Methods 0.000 claims description 12
- 238000005507 spraying Methods 0.000 claims description 12
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims description 11
- 239000000203 mixture Substances 0.000 claims description 11
- 238000003825 pressing Methods 0.000 claims description 11
- 239000002994 raw material Substances 0.000 claims description 11
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 10
- 235000019270 ammonium chloride Nutrition 0.000 claims description 10
- 239000004202 carbamide Substances 0.000 claims description 10
- 230000001804 emulsifying effect Effects 0.000 claims description 10
- 239000000839 emulsion Substances 0.000 claims description 10
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 10
- 230000009970 fire resistant effect Effects 0.000 claims description 7
- 241000193749 Bacillus coagulans Species 0.000 claims description 3
- 241000194108 Bacillus licheniformis Species 0.000 claims description 3
- 241000194107 Bacillus megaterium Species 0.000 claims description 3
- 241000193388 Bacillus thuringiensis Species 0.000 claims description 3
- 241000193417 Brevibacillus laterosporus Species 0.000 claims description 3
- 241000881860 Paenibacillus mucilaginosus Species 0.000 claims description 3
- 241000194105 Paenibacillus polymyxa Species 0.000 claims description 3
- 229940054340 bacillus coagulans Drugs 0.000 claims description 3
- 239000007633 bacillus mucilaginosus Substances 0.000 claims description 3
- 229940097012 bacillus thuringiensis Drugs 0.000 claims description 3
- 239000000805 composite resin Substances 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims 1
- 239000011819 refractory material Substances 0.000 abstract description 4
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 description 10
- 229910000019 calcium carbonate Inorganic materials 0.000 description 5
- 239000011449 brick Substances 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- 239000012620 biological material Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- YKTSYUJCYHOUJP-UHFFFAOYSA-N [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] Chemical compound [O--].[Al+3].[Al+3].[O-][Si]([O-])([O-])[O-] YKTSYUJCYHOUJP-UHFFFAOYSA-N 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000002708 enhancing effect Effects 0.000 description 2
- 230000004060 metabolic process Effects 0.000 description 2
- 244000005700 microbiome Species 0.000 description 2
- 230000001568 sexual effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 description 1
- 239000004115 Sodium Silicate Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229960005069 calcium Drugs 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000035784 germination Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000035755 proliferation Effects 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical group [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 1
- 229910052911 sodium silicate Inorganic materials 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
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Abstract
The invention discloses a refractory heat-insulating material and a preparation method thereof, relates to the technical field of refractory materials, and solves the technical problems of low use temperature, low strength and limited use range of the refractory heat-insulating material in the prior art. The refractory heat-insulating material comprises the following components in parts by weight: 45-110 parts of red sand, 8-30 parts of refractory clay, 8-30 parts of bentonite, 10-50 parts of waste paper fiber, 0.01-1 part of clay dispersant and 2-10 parts of biological capsule, wherein the biological capsule comprises a capsule film, bacillus and calcium lactate, and the bacillus and the calcium lactate are positioned in the capsule film and are wrapped and covered by the capsule film. The fireproof heat-insulating material has the advantages of high strength, high use temperature, good heat-insulating property and strong plasticity.
Description
Technical Field
The invention relates to the technical field of refractory materials, in particular to a refractory heat-insulating material and a preparation method thereof.
Background
In order to reduce heat dissipation and improve thermal efficiency, high-temperature industrial kilns are usually built by adopting refractory heat-insulating materials on a furnace wall and a furnace top. Common refractory heat-insulating materials comprise aluminum silicate limit plates, fibrofelts, light clay bricks, high-alumina bricks and the like, but the aluminum silicate limit plates and the fibrofelts have the defects of low use temperature (the highest use temperature is 1100 ℃), low strength, limited use range and the like; the light clay brick and the high-alumina brick are shaped products, are suitable for building large-area walls, and are not suitable for parts with complex shapes and parts of non-arched furnace tops of furnaces.
The new material is the key development field of the 21 st century, and the biological material is the key point of development as the interdisciplinary subject of life science and material science. The biological material is applied to the refractory material, the refractory heat-insulating material suitable for various high-temperature industrial furnaces and kilns is developed, the innovation of the refractory material can be realized, and the biological material has important significance.
Disclosure of Invention
The invention aims to provide a refractory heat-insulating material and a preparation method thereof, which solve the technical problems of low use temperature, low strength and limited use range of the refractory heat-insulating material in the prior art. The technical effects that can be produced by the preferred technical scheme of the invention are explained in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the refractory heat-insulating material comprises the following components in parts by weight: 45-110 parts of red sand, 8-30 parts of refractory clay, 8-30 parts of bentonite, 10-50 parts of waste paper fiber, 0.01-1 part of clay dispersant and 2-10 parts of biological capsule, wherein the biological capsule comprises a capsule membrane, bacillus and calcium lactate, and the bacillus and the calcium lactate are positioned in the capsule membrane and are wrapped and covered by the capsule membrane.
According to a preferred embodiment, in the biological capsule, the mass percent of the capsule membrane is 50-65%, the mass percent of the bacillus is 15-20%, the mass percent of the calcium lactate is 15-35%, and the sum of the mass percent of the capsule membrane, the mass percent of the bacillus and the mass percent of the calcium lactate is 100%.
According to a preferred embodiment, the capsule membrane is an active silicate-urea-formaldehyde resin composite.
According to a preferred embodiment, the mass ratio of the active silicate to the urea resin in the capsule membrane is 10-15: 1-3.
According to a preferred embodiment, the bacillus is one or more of bacillus thuringiensis, bacillus subtilis, bacillus licheniformis, paenibacillus polymyxa, bacillus coagulans, bacillus megaterium, bacillus laterosporus and bacillus mucilaginosus.
According to a preferred embodiment, the bacillus is bacillus subtilis.
The preparation method of the refractory heat-insulating material in any technical scheme of the invention comprises the following steps:
preparing a biological capsule;
mixing and stirring red sand, refractory clay, bentonite and a clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding waste paper fibers into the mixture in batches, and stirring uniformly again;
after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain refractory heat-insulating slurry;
placing the refractory heat-preservation slurry at room temperature for 10-15 days, and spraying a normal butanol solution on the surface of the refractory heat-preservation slurry every 3-5 days in the placing process;
placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, then baking for 12-24 h at 50-80 ℃, and then baking for 12-24 h at 80-110 ℃.
According to a preferred embodiment, the preparation of the biocapsules comprises the following steps:
dissolving active silicate, urea and ammonium chloride in water to obtain a water phase;
dripping an oil phase mixed with bacillus and calcium lactate into the water phase, and emulsifying to form O/W emulsion;
adding formaldehyde, and reacting for 4-5 h to obtain the biological capsule.
The refractory heat-insulating material and the preparation method thereof provided by the invention at least have the following beneficial technical effects:
the invention relates to a refractory heat-insulating material, which comprises 45-110 parts of red sand, 8-30 parts of refractory clay, 8-30 parts of bentonite, 10-50 parts of waste paper fibers, 0.01-1 part of clay dispersant and 2-10 parts of a biological capsule, wherein the biological capsule comprises a capsule film, bacillus and calcium lactate, the bacillus and the calcium lactate are positioned in the capsule film and are wrapped and covered by the capsule film, the refractory heat-insulating material is provided with the waste paper fibers, the waste paper fibers enable the refractory heat-insulating material to form a large number of fibrous pores, the bacillus can be dormant in a stable and closed environment all year round, the bacillus and the calcium lactate are implanted into the capsule film, in the process of preparing the refractory heat-insulating material, the refractory heat-insulating slurry is placed for 10-15 days at room temperature, in the placing process, n-butyl alcohol solution is sprayed onto the surface of the refractory heat-insulating slurry every 3-5 days, the capsule film can be opened by spraying the n-butyl alcohol solution, the bacillus starts germination and proliferation and is compact by using the calcium lactate, the bacillus can combine calcium carbonate ions by metabolism to form calcium carbonate, the calcium carbonate is compatible with the refractory heat-insulating slurry, the fibrous pores in the refractory slurry are filled to form a compact heat-insulating structure, thereby enhancing the heat-insulating material; on the other hand, the refractory heat-insulating material has a compact structure and high strength, so that the heat-insulating property and the heat resistance of the refractory heat-insulating material can be improved, and particularly, the use temperature of the refractory heat-insulating material can reach more than 1600 ℃, so that the refractory heat-insulating material is obviously improved in use temperature and expanded in use range compared with the refractory heat-insulating material in the prior art; on the other hand, the refractory heat-insulating material is in a slurry form in the preparation process, has strong plasticity, and can be applied to each part of equipment, thereby further expanding the application range of the refractory heat-insulating material.
The refractory heat-insulating material and the preparation method thereof solve the technical problems of low use temperature, low strength and limited use range of the refractory heat-insulating material in the prior art.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The refractory heat-insulating material comprises the following components in parts by weight: 45-110 parts of red sand, 8-30 parts of refractory clay, 8-30 parts of bentonite, 10-50 parts of waste paper fiber, 0.01-1 part of clay dispersant and 2-10 parts of biological capsule, wherein the biological capsule comprises a capsule membrane, bacillus and calcium lactate, and the bacillus and the calcium lactate are positioned in the capsule membrane and are wrapped and covered by the capsule membrane. The fire-resistant heat-insulating material has excellent strength, use temperature, heat-insulating performance and plasticity by screening the proportion of each component.
Specifically, the strength, the use temperature and the heat preservation performance of the refractory heat preservation material are enhanced by the following modes: because the fireproof heat-insulating material is provided with the waste paper fibers, the waste paper fibers enable the fireproof heat-insulating material to form a large number of fibrous pores, the bacillus can be dormant all year round in a stable and closed environment, the bacillus and the calcium lactate are implanted into the capsule membrane, the fireproof heat-insulating slurry is placed at room temperature for 10-15 days in the process of preparing the fireproof heat-insulating material, n-butyl alcohol solution is sprayed to the surface of the fireproof heat-insulating slurry every 3-5 days in the placing process, the capsule membrane can be opened by spraying the n-butyl alcohol solution, the bacillus starts to germinate and proliferate and uses the calcium lactate, the bacillus combines calcium and carbonate ions through metabolism to form calcium carbonate, the calcium carbonate is compatible with the fireproof heat-insulating slurry, the fibrous pores in the fireproof heat-insulating slurry are filled to form a compact structure, and the strength of the fireproof heat-insulating material can be enhanced; on the other hand, the refractory heat-insulating material has a compact structure and high strength, so that the heat-insulating property and the heat resistance of the refractory heat-insulating material can be improved, and particularly, the use temperature of the refractory heat-insulating material can reach more than 1600 ℃, so that the refractory heat-insulating material is obviously improved in use temperature and expanded in use range compared with the refractory heat-insulating material in the prior art; on the other hand, the refractory heat-insulating material is in a slurry form in the preparation process, has strong plasticity, and can be applied to each part of equipment, thereby further expanding the application range of the refractory heat-insulating material.
According to a preferred embodiment, in the biological capsule, the mass percent of the capsule membrane is 50-65%, the mass percent of the bacillus is 15-20%, the mass percent of the calcium lactate is 15-35%, and the sum of the mass percent of the capsule membrane, the mass percent of the bacillus and the mass percent of the calcium lactate is 100%. The formula of the biological capsule in the technical scheme is optimized, so that the biological capsule can fully play the role of enhancing the strength of the refractory heat-insulating material.
According to a preferred embodiment, the capsule membrane is an active silicate-urea-formaldehyde resin composite. Preferably, the mass ratio of the active silicate to the urea-formaldehyde resin is 10-15: 1-3. More preferably, the silicate is sodium silicate. The capsule membrane of the preferred technical scheme of the invention is an active silicate-urea-formaldehyde resin compound, and in the mixing and stirring process, the active silicate-urea-formaldehyde resin compound can effectively protect the bacillus in the capsule membrane and prevent the bacillus from dying to influence the performance of the biological capsule. On the other hand, the capsule membrane of the preferred technical scheme of the invention is a compound of active silicate and urea-formaldehyde resin, the mass ratio of the active silicate to the urea-formaldehyde resin is 10-15: 1-3, and after the capsule membrane is opened, the strength of the fire-resistant heat-insulating material can be further enhanced through the silicate.
According to a preferred embodiment, the bacillus is one or more of bacillus thuringiensis, bacillus subtilis, bacillus licheniformis, paenibacillus polymyxa, bacillus coagulans, bacillus megaterium, bacillus laterosporus and bacillus mucilaginosus. Preferably, the bacillus is bacillus subtilis. The bacillus of the preferred embodiment of the present invention may be a commercially available product. The bacillus has the advantages of high propagation speed, strong vitality, temperature, aerobic property, extrusion resistance, high temperature resistance and the like, and particularly the bacillus subtilis has better performance. The active microorganism in the preferred technical scheme of the invention selects bacillus, so that the active microorganism in the biological capsule has higher survival rate, and the function can be fully exerted.
The preparation method of the refractory heat-insulating material in any technical scheme of the invention comprises the following steps:
s1: preparing the biological capsule. Preferably, the preparation of the biocapsule comprises the steps of:
s11: dissolving active silicate, urea and ammonium chloride in water to obtain a water phase;
s12: dripping an oil phase mixed with bacillus and calcium lactate into the water phase, and emulsifying to form O/W emulsion;
s13: adding formaldehyde, and reacting for 4-5 h to obtain the biological capsule.
S2: mixing and stirring the red sand, the refractory clay, the bentonite and the clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding the waste paper fiber into the mixture in batches, and stirring uniformly again.
S3: after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain the refractory heat-insulating slurry.
S4: placing the refractory heat-insulating slurry at room temperature for 10-15 days, and spraying n-butyl alcohol solution to the surface of the refractory heat-insulating slurry every 3-5 days in the placing process.
S5: placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, then baking for 12-24 h at 50-80 ℃, and then baking for 12-24 h at 80-110 ℃.
Because the bacillus has high temperature resistance, especially the bacillus subtilis can survive at 120-140 ℃, the step S4 can be omitted in the preparation process of the fire-resistant heat-insulating material, and after the step S5 is completed, the equipment is placed for standby for a while, and in the placing process, the strength, the use temperature and the heat-insulating property of the fire-resistant heat-insulating material are enhanced by using the effect of the biological capsule.
Example 1
A refractory heat-insulating material comprises the following components in parts by weight: 45 parts of red sand, 8 parts of refractory clay, 8 parts of bentonite, 10 parts of waste paper fiber, 0.01 part of clay dispersant and 2 parts of biological capsule, wherein the biological capsule comprises a capsule film, bacillus and calcium lactate, the bacillus and the calcium lactate are positioned in the capsule film and are wrapped and covered by the capsule film, the mass percent of the capsule film is 50%, the mass percent of the bacillus is 15%, and the mass percent of the calcium lactate is 35%.
The capsule membrane is a silicate-urea-formaldehyde resin compound, and the mass ratio of the active silicate to the urea-formaldehyde resin is 10: 1; the bacillus is bacillus subtilis.
The preparation method of the refractory heat-insulating material comprises the following steps:
s1: dissolving active silicate, urea and ammonium chloride in water to obtain a water phase; dripping an oil phase mixed with bacillus and calcium lactate into the water phase, and emulsifying to form O/W emulsion; adding formaldehyde, and reacting for 4h to obtain the biological capsule.
S2: mixing and stirring red sand, refractory clay, bentonite and a clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding waste paper fibers into the mixture in batches, and stirring uniformly again;
s3: after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain refractory heat-insulating slurry;
s4: placing the refractory heat-preservation slurry at room temperature for 10 days, and spraying n-butanol solution to the surface of the refractory heat-preservation slurry every 3 days in the placing process;
s5: placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, baking at 50 ℃ for 12h, and baking at 80 ℃ for 12h.
The volume density of the refractory thermal insulation material prepared in the embodiment is 2.7g/cm through testing 3 The compressive strength was 102MPa.
Example 2
A refractory heat-insulating material comprises the following components in parts by weight: 70 parts of red sand, 12 parts of refractory clay, 12 parts of bentonite, 20 parts of waste paper fiber, 0.05 part of clay dispersant and 3 parts of biological capsule, wherein the biological capsule comprises a capsule film, bacillus and calcium lactate, the bacillus and the calcium lactate are positioned in the capsule film and are wrapped and covered by the capsule film, the mass percent of the capsule film is 53%, the mass percent of the bacillus is 16%, and the mass percent of the calcium lactate is 31%.
The capsule membrane is a silicate-urea-formaldehyde resin compound, and the mass ratio of the active silicate to the urea-formaldehyde resin is 15: 1; the bacillus is bacillus subtilis.
The preparation method of the refractory heat-insulating material comprises the following steps:
s1: dissolving active silicate, urea and ammonium chloride in water to obtain a water phase; dripping an oil phase mixed with bacillus and calcium lactate into the water phase, and emulsifying to form O/W emulsion; adding formaldehyde, and reacting for 5h to obtain the biological capsule.
S2: mixing and stirring red sand, refractory clay, bentonite and a clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding waste paper fibers into the mixture in batches, and stirring uniformly again;
s3: after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain refractory heat-insulating slurry;
s4: placing the refractory heat-insulating slurry at room temperature for 11 days, and spraying n-butanol solution on the surface of the refractory heat-insulating slurry every 3 days in the placing process;
s5: placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, baking at 60 ℃ for 15h, and baking at 90 ℃ for 15h.
The volume density of the refractory heat-insulating material prepared in the embodiment is 2.4g/cm through testing 3 The compressive strength was 100MPa.
Example 3
The refractory heat-insulating material comprises the following components in parts by weight: 95 parts of red sand, 15 parts of refractory clay, 15 parts of bentonite, 30 parts of waste paper fiber, 0.5 part of clay dispersant and 5 parts of biological capsule, wherein the biological capsule comprises a capsule film, bacillus and calcium lactate, the bacillus and the calcium lactate are positioned in the capsule film and are wrapped and covered by the capsule film, the mass percent of the capsule film is 58%, the mass percent of the bacillus is 17%, and the mass percent of the calcium lactate is 25%.
The capsule membrane is a silicate-urea-formaldehyde resin compound, and the mass ratio of the active silicate to the urea-formaldehyde resin is 10: 3; the bacillus is bacillus subtilis.
The preparation method of the refractory heat-insulating material comprises the following steps:
s1: dissolving active silicate, urea and ammonium chloride in water to obtain a water phase; dripping an oil phase mixed with bacillus and calcium lactate into the water phase, and emulsifying to form O/W emulsion; adding formaldehyde, and reacting for 4h to obtain the biological capsule.
S2: mixing and stirring red sand, refractory clay, bentonite and a clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding waste paper fibers into the mixture in batches, and stirring uniformly again;
s3: after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain refractory heat-insulating slurry;
s4: placing the refractory heat-insulating slurry at room temperature for 12 days, and spraying n-butanol solution on the surface of the refractory heat-insulating slurry every 4 days in the placing process;
s5: placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, baking at 65 ℃ for 18h, and baking at 95 ℃ for 18h.
The volume density of the refractory heat-insulating material prepared by the embodiment is 2.8g/cm through testing 3 The compressive strength was 105MPa.
Example 4
A refractory heat-insulating material comprises the following components in parts by weight: 105 parts of red sand, 20 parts of refractory clay, 20 parts of bentonite, 40 parts of waste paper fiber, 0.8 part of clay dispersant and 8 parts of biological capsule, wherein the biological capsule comprises a capsule film, bacillus and calcium lactate, the bacillus and the calcium lactate are positioned in the capsule film and are wrapped and covered by the capsule film, the mass percent of the capsule film is 60%, the mass percent of the bacillus is 18%, and the mass percent of the calcium lactate is 22%.
The capsule membrane is a silicate-urea-formaldehyde resin compound, and the mass ratio of the active silicate to the urea-formaldehyde resin is 12: 1; the bacillus is bacillus subtilis.
The preparation method of the refractory heat-insulating material comprises the following steps:
s1: dissolving active silicate, urea and ammonium chloride in water to obtain a water phase; dripping an oil phase mixed with bacillus and calcium lactate into the water phase, and emulsifying to form O/W emulsion; adding formaldehyde, and reacting for 5h to obtain the biological capsule.
S2: mixing and stirring red sand, refractory clay, bentonite and a clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding waste paper fibers into the mixture in batches, and stirring uniformly again;
s3: after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain refractory heat-insulating slurry;
s4: placing the refractory heat-insulating slurry at room temperature for 13 days, and spraying n-butanol solution on the surface of the refractory heat-insulating slurry every 4 days in the placing process;
s5: placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, baking at 70 ℃ for 21h, and baking at 100 ℃ for 21h.
The volume density of the refractory heat-insulating material prepared in the embodiment is 2.4g/cm through testing 3 The compressive strength was 98MPa.
Example 5
A refractory heat-insulating material comprises the following components in parts by weight: 110 parts of red sand, 30 parts of refractory clay, 30 parts of bentonite, 50 parts of waste paper fiber, 1 part of clay dispersant and 10 parts of biological capsule, wherein the biological capsule comprises a capsule film, bacillus and calcium lactate, the bacillus and the calcium lactate are positioned in the capsule film and are wrapped and covered by the capsule film, the mass percent of the capsule film is 65%, the mass percent of the bacillus is 20%, and the mass percent of the calcium lactate is 15%.
The capsule membrane is a sexual silicate-urea-formaldehyde resin compound, and the mass ratio of the active silicate to the urea-formaldehyde resin is 5: 1; the bacillus is bacillus subtilis.
The preparation method of the refractory heat-insulating material comprises the following steps:
s1: dissolving active silicate, urea and ammonium chloride in water to obtain a water phase; dripping an oil phase mixed with bacillus and calcium lactate into the water phase, and emulsifying to form O/W emulsion; adding formaldehyde, and reacting for 5h to obtain the biological capsule.
S2: mixing and stirring red sand, refractory clay, bentonite and a clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding waste paper fibers into the mixture in batches, and stirring uniformly again;
s3: after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain refractory heat-insulating slurry;
s4: placing the refractory heat-preservation slurry at room temperature for 15 days, and spraying n-butanol solution to the surface of the refractory heat-preservation slurry every 5 days in the placing process;
s5: placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, baking at 80 ℃ for 24 hours, and baking at 110 ℃ for 24 hours.
The volume density of the refractory heat-insulating material prepared in the embodiment is 2.3g/cm through testing 3 The compressive strength was 103MPa.
Comparative example 1
A refractory heat-insulating material comprises the following components in parts by weight: 45 parts of red sand, 8 parts of refractory clay, 8 parts of bentonite, 10 parts of waste paper fiber and 0.01 part of clay dispersant.
The preparation method of the refractory heat-insulating material comprises the following steps:
s1: mixing and stirring red sand, refractory clay, bentonite and a clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding waste paper fibers into the mixture in batches, and stirring uniformly again;
s2: after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain refractory heat-insulating slurry;
s3: placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, baking at 50 ℃ for 12h, and baking at 80 ℃ for 12h.
The volume density of the refractory heat-insulating material prepared in the embodiment is 1.2g/cm through testing 3 The compressive strength was 85MPa.
Comparative example 2
The refractory heat-insulating material comprises the following components in parts by weight: 45 parts of red sand, 6 parts of refractory clay, 6 parts of bentonite, 8 parts of waste paper fiber, 0.001 part of clay dispersant and 1 part of biological capsule, wherein the biological capsule comprises a capsule film, bacillus and calcium lactate, the bacillus and the calcium lactate are positioned in the capsule film and are wrapped and covered by the capsule film, the mass percent of the capsule film is 35%, the mass percent of the bacillus is 10%, and the mass percent of the calcium lactate is 55%.
The capsule membrane is a sexual silicate-urea-formaldehyde resin compound, and the mass ratio of the active silicate to the urea-formaldehyde resin is 20: 1; the bacillus is bacillus subtilis.
The preparation method of the refractory heat-insulating material comprises the following steps:
s1: dissolving active silicate, urea and ammonium chloride in water to obtain a water phase; dripping an oil phase mixed with bacillus and calcium lactate into the water phase, and emulsifying to form O/W emulsion; adding formaldehyde, and reacting for 4h to obtain the biological capsule.
S2: mixing and stirring red sand, refractory clay, bentonite and a clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding waste paper fibers into the mixture in batches, and stirring uniformly again;
s3: after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain refractory heat-insulating slurry;
s4: placing the refractory heat-preservation slurry at room temperature for 10 days, and spraying n-butanol solution to the surface of the refractory heat-preservation slurry every 3 days in the placing process;
s5: placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, baking at 50 ℃ for 12h, and baking at 80 ℃ for 12h.
The volume density of the refractory heat-insulating material prepared in the embodiment is 1.8g/cm through testing 3 The compressive strength was 93MPa.
Comparative example 3
A refractory heat-insulating material comprises the following components in parts by weight: 45 parts of red sand, 10 parts of refractory clay, 10 parts of bentonite, 15 parts of waste paper fiber, 0.03 part of a clay dispersant and 1 part of a biological capsule, wherein the biological capsule comprises a capsule film, 75% of the capsule film, 5% of the bacillus and 20% of the calcium lactate, and the bacillus and the calcium lactate are positioned in the capsule film and are wrapped and covered by the capsule film.
The capsule membrane is a silicate-urea-formaldehyde resin compound, and the mass ratio of the active silicate to the urea-formaldehyde resin is 20: 1; the bacillus is bacillus subtilis.
The preparation method of the refractory heat-insulating material comprises the following steps:
s1: dissolving active silicate, urea and ammonium chloride in water to obtain a water phase; dripping an oil phase mixed with bacillus and calcium lactate into the water phase, and emulsifying to form O/W emulsion; adding formaldehyde, and reacting for 4h to obtain the biological capsule.
S2: mixing and stirring red sand, refractory clay, bentonite and a clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding waste paper fibers into the mixture in batches, and stirring uniformly again;
s3: after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain refractory heat-insulating slurry;
s4: placing the refractory heat-insulating slurry at room temperature for 10 days, and spraying n-butanol solution on the surface of the refractory heat-insulating slurry every 3 days in the placing process;
s5: placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, baking at 50 ℃ for 12h, and baking at 80 ℃ for 12h.
The volume density of the refractory thermal insulation material prepared in the embodiment is 1.6g/cm through testing 3 The compressive strength was 90MPa.
The refractory heat insulating materials obtained in examples 1 to 5 were more compact and had excellent compressive strength as compared with comparative examples 1 to 3.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (8)
1. The refractory heat-insulating material is characterized by comprising the following components in parts by weight: 45-110 parts of red sand, 8-30 parts of refractory clay, 8-30 parts of bentonite, 10-50 parts of waste paper fiber, 0.01-1 part of clay dispersant and 2-10 parts of biological capsule, wherein the biological capsule comprises a capsule membrane, bacillus and calcium lactate, and the bacillus and the calcium lactate are positioned in the capsule membrane and are wrapped and covered by the capsule membrane.
2. The fire-resistant thermal insulation material according to claim 1, wherein the bio-capsule comprises 50 to 65 mass% of the capsule film, 15 to 20 mass% of the bacillus, 15 to 35 mass% of the calcium lactate, and the sum of the mass% of the capsule film, the mass% of the bacillus and the mass% of the calcium lactate is 100%.
3. The fire resistant insulation of claim 2 wherein said capsule film is an activated silicate-urea formaldehyde resin composite.
4. The fire-resistant heat-insulating material as claimed in claim 3, wherein the mass ratio of the active silicate to the urea-formaldehyde resin in the capsule film is 10-15: 1-3.
5. The refractory insulating material of claim 2, wherein the bacillus is one or more of bacillus thuringiensis, bacillus subtilis, bacillus licheniformis, paenibacillus polymyxa, bacillus coagulans, bacillus megaterium, bacillus laterosporus, and bacillus mucilaginosus.
6. The refractory insulating material of claim 5, wherein the Bacillus is Bacillus subtilis.
7. A method for preparing the refractory insulating material according to any one of claims 1 to 6, characterized by comprising the following steps:
preparing a biological capsule;
mixing and stirring red sand, refractory clay, bentonite and a clay dispersant, adding water accounting for 20 percent of the weight of the raw materials, stirring uniformly, adding waste paper fibers into the mixture in batches, and stirring uniformly again;
after the waste paper fiber is added, adding the biological capsule and stirring uniformly to obtain refractory heat-insulating slurry;
placing the refractory heat-preservation slurry at room temperature for 10-15 days, and spraying a normal butanol solution on the surface of the refractory heat-preservation slurry every 3-5 days in the placing process;
placing the refractory heat-insulating slurry on a part to be used, manually pressing, tamping and plastering, then baking for 12-24 h at 50-80 ℃, and then baking for 12-24 h at 80-110 ℃.
8. The method for preparing the refractory heat-insulating material according to claim 7, wherein the preparing the biological capsule comprises the following steps:
dissolving active silicate, urea and ammonium chloride in water to obtain a water phase;
dripping an oil phase mixed with bacillus and calcium lactate into the water phase, and emulsifying to form O/W emulsion;
adding formaldehyde, and reacting for 4-5 h to obtain the biological capsule.
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