Summary of the invention
In view of this, heat provided by the invention is anti-the purpose of the present invention is to provide a kind of thermal protection coating and its applicationShield coating intensity is high, high-temperature shrinkage is small, crackle, airflow are not washed away and the corrosion of environment, is highly suitable for the anti-of fibre furnace liningShield and repairing.
The present invention provides a kind of thermal protection coatings, are mixed by water and the raw material including following parts by weight of component:
The fibre diameter of the inorganic long fiber is 1~10 μm, and fibre length is 1~20mm；
The partial size of the coarse granule refractory powder is 20~80 mesh.
Preferably, the inorganic long fiber includes glass fibre, rock wool fibers, alumina silicate fibre, magnesium silicate fiber, silicic acidOne of calcium fiber and alpha-alumina crystals fiber are a variety of.
Preferably, the partial size of the alumina powder is 200~500 mesh.
Preferably, the coarse granule refractory powder is refractory brick brick powder.
Preferably, the refractory brick brick powder at being grouped as including Al2O3And SiO2。
Preferably, the inorganic bonding agent includes one of sodium silicate, silica solution and aluminium dihydrogen phosphate or a variety of.
Preferably, the raw material further includes the organic bond of 0.5~5 parts by weight.
Preferably, the content of water described in coating is 20~50wt%.
The present invention provides a kind of thermal protection coating, drying is formed after the coating as described in above-mentioned technical proposal is coated.
The present invention provides a kind of heat-treatment furnace, furnace lining surface is provided with coating described in above-mentioned technical proposal.
Compared with prior art, the present invention provides a kind of thermal protection coating and its applications.Thermal protection provided by the inventionRaw material of the coating by water and including following parts by weight of component is mixed: 10~50 parts of inorganic long fiber；1~8 part of chamotte；2~15 parts of alumina powder；3~20 parts of coarse granule refractory powder；8~30 parts of inorganic bonding agent；The fiber of the inorganic long fiberDiameter is 1~10 μm, and fibre length is 1~20mm；The partial size of the coarse granule refractory powder is 20~80 mesh.The present invention passes throughFor optimizing to thermal protection coating at being grouped as, it is obviously improved the performance of coating, specific manifestation are as follows: intensity is high,High-temperature shrinkage is small, crackle, airflow are not washed away and the corrosion of environment.It is coated onto fibre furnace lining surface, can obviously improve fibreDimension furnace lining is influenced during applied at elevated temperature by furnace atmosphere, causes crystallization, dusting, scaling-off, it is integrally-built to destroy furnace liningSituation greatly prolongs the service life of fibre furnace lining.Moreover, coating provided by the invention also has good heat insulation propertyCan, being coated to furnace lining surface can effectively prevent radiation and convection current to furnace chamber bring heat loss.The experimental results showed that the present inventionCompressive resistance >=1MPa after the coating of offer is dry, flexural strength >=1MPa heat linear shrinkage≤3%, cut down according to the circumstance≤3%, resistance toAirflow scouring performance >=80m/s, 1 year or more corrosion-free, the cracking sign in acid atmosphere, line variation≤2%, thermal coefficient≤0.175W/(m.K)。
Specific embodiment
The technical scheme in the embodiments of the invention will be clearly and completely described below, it is clear that described implementationExample is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, this field is commonTechnical staff's every other embodiment obtained without making creative work belongs to the model that the present invention protectsIt encloses.
The present invention provides a kind of thermal protection coatings, are mixed by water and the raw material including following parts by weight of component:
The fibre diameter of the inorganic long fiber is 1~10 μm, and fibre length is 1~20mm；
The partial size of the coarse granule refractory powder is 20~80 mesh.
Coating provided by the invention is mixed by water and above-mentioned raw materials, wherein the inorganic long fiber includes but unlimitedIn one of glass fibre, rock wool fibers, alumina silicate fibre, magnesium silicate fiber, ca silicate fibre and alpha-alumina crystals fiberOr it is a variety of.In the present invention, the Al in the alumina silicate fibre2O3Content is preferably 40~60wt%, concretely 44wt% or52~55wt%.In implementing at one provided by the invention, the inorganic long fiber includes rock wool fibers and alumina silicate fibre, instituteThe mass ratio for stating rock wool fibers and alumina silicate fibre is preferably 1:(0.5~2), more preferably 1:1.Provided by the invention anotherIn a embodiment, the inorganic long fiber includes aluminium silicate fiber peacekeeping alpha-alumina crystals fiber, the aluminium silicate fiber peacekeeping oxidationThe mass ratio of aluminium crystal fibre is preferably 1:(1~3), more preferably 1:2.In the present invention, the fiber of the inorganic long fiberDiameter is 1~10 μm, concretely 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm or 10 μm；The no captain is fineThe fibre length of dimension be 1~20mm, concretely 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, 10mm, 11mm,12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm or 20mm.In the present invention, the inorganic long fiber is describedContent in raw material is 10~50 parts by weight, concretely 1 parts by weight, 2 parts by weight, 3 parts by weight, 4 parts by weight, 5 parts by weight, 6Parts by weight, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight,15 parts by weight, 16 parts by weight, 17 parts by weight, 18 parts by weight, 19 parts by weight, 20 parts by weight, 21 parts by weight, 22 parts by weight, 23 weightsMeasure part, 24 parts by weight, 25 parts by weight, 26 parts by weight, 27 parts by weight, 28 parts by weight, 29 parts by weight, 30 parts by weight, 31 parts by weight,32 parts by weight, 33 parts by weight, 34 parts by weight, 35 parts by weight, 36 parts by weight, 37 parts by weight, 38 parts by weight, 39 parts by weight, 40 weightsMeasure part, 41 parts by weight, 42 parts by weight, 43 parts by weight, 44 parts by weight, 45 parts by weight, 46 parts by weight, 47 parts by weight, 48 parts by weight,49 parts by weight or 50 parts by weight.
In the present invention, the partial size of chamotte is preferably 200~300 mesh, concretely 200 mesh, 250 mesh or 300 mesh.In the present invention, content of the chamotte in the raw material is 1~8 parts by weight, concretely 1 parts by weight, 1.5 weightPart, 1.6 parts by weight, 1.7 parts by weight, 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.3 parts by weight, 3.4 parts by weight, 3.5 weightPart, 4 parts by weight, 4.5 parts by weight, 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 7 parts by weight, 7.5 parts by weight or 8Parts by weight.
In the present invention, the partial size of the alumina powder is preferably 200~500 mesh, concretely 200 mesh, 250 mesh, 300Mesh, 350 mesh, 400 mesh, 450 mesh or 500 mesh.In the present invention, content of the alumina powder in the raw material is 2~15Parts by weight, concretely 2 parts by weight, 2.5 parts by weight, 3 parts by weight, 3.3 parts by weight, 3.4 parts by weight, 3.5 parts by weight, 4 weightPart, 4.5 parts by weight, 5 parts by weight, 5.5 parts by weight, 6 parts by weight, 6.5 parts by weight, 6.6 parts by weight, 6.7 parts by weight, 7 parts by weight,7.5 parts by weight, 8 parts by weight, 8.5 parts by weight, 9 parts by weight, 9.5 parts by weight, 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 weightsMeasure part, 14 parts by weight or 15 parts by weight.
In the present invention, the coarse granule refractory powder is preferably refractory brick brick powder, the refractory brick brick powder at groupingAt preferably including Al2O3And SiO2, wherein the Al2O3Content be preferably 35~70wt%, concretely 37wt%,42wt%, 53wt%, 56wt% or 67wt%；The SiO2Content be preferably 25~60wt%, concretely 30wt%,40wt%, 43wt%, 52wt% or 55wt%.In the present invention, Luyang refractory brick brick specifically may be selected in the refractory brick brick powderPowder feed back.In the present invention in, the partial size of the coarse granule refractory powder is 20~80 mesh, concretely 20 mesh, 25 mesh, 30Mesh, 35 mesh, 40 mesh, 45 mesh, 50 mesh, 55 mesh, 60 mesh, 65 mesh, 70 mesh, 75 mesh or 80 mesh.In the present invention, the coarse granule is resistance toContent of the fiery powder in the raw material is 3~20 parts by weight, concretely 3 parts by weight, 4 parts by weight, 5 parts by weight, 6 weightPart, 7 parts by weight, 8 parts by weight, 9 parts by weight, 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, 15 weightsMeasure part, 16 parts by weight, 17 parts by weight, 18 parts by weight, 19 parts by weight or 20 parts by weight.
In the present invention, the inorganic bonding agent includes but is not limited to one in sodium silicate, silica solution and aluminium dihydrogen phosphateKind is a variety of；The solid content of the silica solution is preferably 20~40wt%, concretely 20wt%, 25wt%, 30wt%,35wt% or 40wt%.In the present invention, content of the inorganic bonding agent in the raw material is 8~30 parts by weight, specificallyIt can be 8 parts by weight, 9 parts by weight, 10 parts by weight, 11 parts by weight, 12 parts by weight, 13 parts by weight, 14 parts by weight, 15 parts by weight, 16Parts by weight, 17 parts by weight, 18 parts by weight, 19 parts by weight, 20 parts by weight, 21 parts by weight, 22 parts by weight, 23 parts by weight, 24 weightPart, 25 parts by weight, 26 parts by weight, 27 parts by weight, 28 parts by weight, 29 parts by weight or 30 parts by weight.
In the present invention, it is also preferable to include organic bond in the raw material, the organic bond includes but is not limited toPolyethylene emulsion and/or polyoxy enol lotion；The solid content of the lotion is preferably 3~10wt%, concretely 3wt%,4wt%, 5wt%, 6wt%, 7wt%, 8wt%, 9wt% or 10wt%.In the present invention, the organic bond is in the originalContent in material is preferably 0.5~5 parts by weight, concretely 0.5 parts by weight, 1 parts by weight, 1.5 parts by weight, 2 parts by weight, 2.5Parts by weight, 3 parts by weight, 3.5 parts by weight, 4 parts by weight, 4.5 parts by weight or 5 parts by weight.
In the present invention, the content of water described in coating is preferably 20~50wt%, concretely 20wt%,23.5wt%, 25wt%, 28.5wt%, 30wt%, 35wt%, 38.5wt%, 40wt%, 43.5wt%, 45wt% or50wt%.
In the present invention, the hygrometric state bulk density of the coating is preferably 900~1500kg/m3, concretely 900kg/m3、950kg/m3、1000kg/m3、1050kg/m3、1100kg/m3、1150kg/m3、1200kg/m3、1250kg/m3、1300kg/m3、1350kg/m3、1400kg/m3、1450kg/m3Or 1500kg/m3；Bulk density after the coating is dry is preferably 350~750kg/m3, concretely 350kg/m3、400kg/m3、450kg/m3、500kg/m3、550kg/m3、600kg/m3、650kg/m3、680kg/m3、700kg/m3Or 750kg/m3。
In the present invention, viscosity of the coating at 25 DEG C is preferably 10000~100000MPa.S, concretely10000MPa.S、20000MPa.S、30000MPa.S、40000MPa.S、50000MPa.S、60000MPa.S、70000MPa.S、80000MPa.S, 90000MPa.S or 100000MPa.S.
In the present invention, the preparation process of the thermal protection coating is not particularly limited, directly by water and the raw materialBeing uniformly mixed can be obtained thermal protection coating provided by the invention.
The present invention has been obviously improved the performance of coating, has had by optimizing to thermal protection coating at being grouped asBody shows themselves in that intensity is high, high-temperature shrinkage is small, crackle, airflow are not washed away and the corrosion of environment.More specifically, the present invention providesThermal protection coating at least have the advantages that in use
1) after the furnace lining external coating coating provided by the invention of high temperature kiln, the hard of one layer of not no crackle can be formedShell can effectively resist the destruction of the external conditions such as erosion, the thermal shock of environment, using this coating structure, can effectively prolongLong furnace lining service life.
2) coating use scope provided by the invention is wide, can use in wide temperature range.
3) coating provided by the invention can effectively prevent radiation and convection current bring heat loss, improve the thermal insulation separation of furnace liningThermal effect.
4) repairing of old furnace lining can clear up the furnace lining surface of damaged location when high temperature furnace furnace lining Local DamagedAfterwards, not only easy for construction but also durable with patching coating provided by the invention.
The experimental results showed that compressive resistance >=1MPa after coating provided by the invention is dry, flexural strength >=1MPa addHot line shrinks≤3%, cuts down according to the circumstance≤3%, airflow performance of flushing >=80m/s, in acid atmosphere 1 year or more it is corrosion-free, crackSign, line variation≤2%, thermal coefficient≤0.175W/ (m.K).
The present invention also provides a kind of thermal protection coating, the coated rear dry shape of the coating as described in above-mentioned technical proposalAt.Coating provided by the invention is formed by the coated rear drying of the coating, has good service performance, specific manifestation are as follows:Intensity is high, high-temperature shrinkage is small, crackle, airflow are not washed away and the corrosion of environment.And coating provided by the invention also have it is goodGood thermal and insulating performance.
The present invention also provides a kind of heat-treatment furnace, described in the furnace lining surface setting above-mentioned technical proposal of the heat-treatment furnaceCoating.The coating is arranged on its furnace lining surface in heat-treatment furnace provided by the invention, can obviously improve fibre furnace lining in high temperatureIt the case where being influenced in use process by furnace atmosphere, causing crystallization, dusting, scaling-off, destroy furnace lining overall structure, greatly prolongsThe service life of fibre furnace lining.Moreover, because the coating on furnace lining surface, which is arranged in, also has good thermal and insulating performance, thereforeRadiation and convection current can't cause too big heat loss to the furnace chamber of heat-treatment furnace provided by the invention.
For the sake of becoming apparent from, it is described in detail below by following embodiment.