CN108467279A - Lightweight insulated pouring material and preparation method thereof for tundish cover - Google Patents
Lightweight insulated pouring material and preparation method thereof for tundish cover Download PDFInfo
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- 239000000463 material Substances 0.000 title claims abstract description 11
- 238000002360 preparation method Methods 0.000 title abstract description 4
- 239000000843 powder Substances 0.000 claims abstract description 56
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 39
- 239000002994 raw material Substances 0.000 claims abstract description 29
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 238000004321 preservation Methods 0.000 claims abstract description 22
- 229910001570 bauxite Inorganic materials 0.000 claims abstract description 20
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000004568 cement Substances 0.000 claims abstract description 16
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims abstract description 16
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 16
- JTCFNJXQEFODHE-UHFFFAOYSA-N [Ca].[Ti] Chemical compound [Ca].[Ti] JTCFNJXQEFODHE-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000011148 porous material Substances 0.000 claims abstract description 6
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 30
- 229920002472 Starch Polymers 0.000 claims description 22
- 239000008107 starch Substances 0.000 claims description 22
- 235000019698 starch Nutrition 0.000 claims description 22
- 239000003795 chemical substances by application Substances 0.000 claims description 21
- -1 calcium titanium aluminate Chemical class 0.000 claims description 19
- 239000002253 acid Substances 0.000 claims description 15
- 239000011324 bead Substances 0.000 claims description 15
- 239000006185 dispersion Substances 0.000 claims description 15
- 238000007667 floating Methods 0.000 claims description 15
- 239000000377 silicon dioxide Substances 0.000 claims description 15
- 239000002245 particle Substances 0.000 claims description 14
- 239000004033 plastic Substances 0.000 claims description 14
- 229920003023 plastic Polymers 0.000 claims description 14
- 229910052594 sapphire Inorganic materials 0.000 claims description 11
- 239000010980 sapphire Substances 0.000 claims description 11
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 6
- 229910052593 corundum Inorganic materials 0.000 claims description 5
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 3
- 239000010703 silicon Substances 0.000 claims description 3
- 239000002131 composite material Substances 0.000 claims description 2
- 229910000831 Steel Inorganic materials 0.000 abstract description 15
- 239000010959 steel Substances 0.000 abstract description 15
- 230000008901 benefit Effects 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 3
- 239000002910 solid waste Substances 0.000 abstract description 3
- 229910001200 Ferrotitanium Inorganic materials 0.000 abstract description 2
- 230000000694 effects Effects 0.000 abstract description 2
- 239000002699 waste material Substances 0.000 abstract description 2
- 150000001732 carboxylic acid derivatives Chemical class 0.000 abstract 1
- 235000013312 flour Nutrition 0.000 abstract 1
- 238000004064 recycling Methods 0.000 abstract 1
- 239000011863 silicon-based powder Substances 0.000 abstract 1
- 229910052719 titanium Inorganic materials 0.000 abstract 1
- 239000010936 titanium Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 10
- 230000035939 shock Effects 0.000 description 6
- 238000009413 insulation Methods 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005275 alloying Methods 0.000 description 1
- INJRKJPEYSAMPD-UHFFFAOYSA-N aluminum;silicic acid;hydrate Chemical compound O.[Al].[Al].O[Si](O)(O)O INJRKJPEYSAMPD-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000002440 industrial waste Substances 0.000 description 1
- 229910052850 kyanite Inorganic materials 0.000 description 1
- 239000010443 kyanite Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007670 refining Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
- C04B35/101—Refractories from grain sized mixtures
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The lightweight insulated pouring material and preparation method thereof that the invention discloses a kind of for tundish cover, it includes 25~65 parts of alumina aggregate, 5~25 parts of calcined bauxite in powder, 10~30 parts of titanium calcium aluminate hollow ball, 3~10 parts of silicon powder, 5~10 parts of aquamaine mountain flour, 5~10 parts of aluminous cement, 0.05~0.1 part of sodium tripolyphosphate, 0.05~0.1 part of poly carboxylic acid series water reducer, 5~10 parts of pore creating material and 3~10 parts of high dispersive water-soluble fibre that its raw material is counted by ratio of weight and the number of copies.Lightweight insulated pouring material of the present invention can not only extend backpack cover service life, molten steel temperature drop can also be reduced, packet baking efficiency in raising, achieve the effect that heat preservation energy-saving, and use waste residue processing product-titanium calcium aluminate hollow ball that smelting ferro-titanium generates and used as raw material so that Industrial Solid Waste is comprehensively utilized and recycling treatment.Cost of material is low, cost-effective.Exemplary role can be in industry played, preferable economic benefit and social benefit are brought.
Description
Technical Field
The invention relates to a refractory material, and in particular relates to a lightweight heat-insulating castable for a tundish cover and a preparation method thereof.
Background
The tundish is an intermediate container between the steel ladle and the crystallizer, and the improvement of the continuous casting technology ensures that the tundish not only stores and distributes molten steel, but also realizes various refining functions of impurity separation, alloying and the like. The tundish cover is an important component of the tundish. With the increasing importance of the steel rabbet on energy conservation and consumption reduction, the function of the tundish cover is more prominent. The steel pouring device can preserve heat and insulate heat when the tundish is baked off line or cast on line, protects a steel pouring mechanism, improves the working environment of workers, and plays a role in safety protection.
The tundish cover works at high temperature for a long time and is frequently lifted, and is mainly influenced by frequent temperature change, high-temperature molten steel heat radiation, thermal stress deformation and the like. According to the analysis of the used refractory castable residue of the tundish cover and the field use condition of the tundish cover, the comprehensive judgment causes the damage reason of the refractory castable of the tundish cover to be that: the influence caused by thermal stress generated in the casting material and deformation of the ladle cover steel structure due to severe temperature fluctuation. Therefore, the service life of the ladle cover is prolonged: and the thermal shock resistance of the castable is required to be improved, and the influence of temperature fluctuation on the castable is reduced. And secondly, the heat insulation performance of the casting material needs to be improved, and the influence of temperature fluctuation on a ladle cover steel structure is reduced so as to reduce deformation.
The tundish cover is not in direct contact with high-temperature molten steel, the density of the refractory castable adopted at present is high, the ladle cover is overweight, and one of the factors causing deformation of a steel structure is caused, the heat insulation performance of the common castable is poor, the baking energy consumption and the temperature drop of the molten steel are increased, and meanwhile, the steel structure cannot be protected from the influence of temperature fluctuation.
Therefore, the refractory castable needs to be developed, which can ensure the service life of the ladle cover and can preserve heat and save energy.
Disclosure of Invention
The lightweight heat-insulating castable for the tundish cover has the characteristics of small density, light weight, small heat conductivity coefficient, good heat-insulating property and good thermal shock resistance stability, and achieves the purposes of prolonging the service life of the tundish cover, saving energy and protecting environment.
In order to achieve the purpose, the lightweight heat-insulating castable for the tundish cover is designed, and comprises the following raw materials, by weight, 25-65 parts of alumina aggregate, 5-25 parts of bauxite powder, 10-30 parts of calcium titanium aluminate hollow spheres, 3-10 parts of silica powder, 5-10 parts of kyanite powder, 5-10 parts of calcium aluminate cement, 0.05-0.1 part of sodium tripolyphosphate, 0.05-0.1 part of polycarboxylic acid water reducing agent, 5-10 parts of pore forming agent and 3-10 parts of high-dispersion water-soluble fibers.
The lightweight heat-insulating castable comprises, by weight, 30-55 parts of alumina aggregate, 5-15 parts of bauxite powder, 15-30 parts of calcium titanium aluminate hollow spheres, 4-6 parts of silica powder, 7-10 parts of sapphire powder, 7-10 parts of calcium aluminate cement, 0.05-0.1 part of sodium tripolyphosphate, 0.05-0.1 part of a polycarboxylic acid water reducing agent, 5-7 parts of a pore forming agent and 3-5 parts of high-dispersion water-soluble fibers.
Still further, in the alumina aggregate and the alumina powder, Al is contained2O3The mass percent content is more than or equal to 70 percent, and Fe2O3The mass percentage content is less than 2.0 percent.
Further, the bauxite aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 40-65%, 20-30% and 15-30%; the granularity of the bauxite powder is less than 0.074 mm.
Still further, the titanium calcium aluminate blankIn the heart sphere, Al2O3The mass percent content is more than or equal to 65 percent, and Fe2O3The mass percentage content is less than 1.0 percent; the calcium titanium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 40-60% and 40-60%.
Further, the granularity of the silicon micropowder is less than 0.074 mm; the granularity of the cyanite powder is less than 0.074 mm.
Still further, the composite pore-forming agent is selected from floating beads, plastic and starch.
And further, the pore-forming agent is formed by mixing starch and floating beads/plastic, wherein the weight ratio of the starch to the floating beads/plastic is 1: 1-2.
Still further, the lightweight heat-insulating castable comprises, by weight, 40 parts of alumina aggregate, 10 parts of alumina powder, 20 parts of calcium titanium aluminate hollow spheres, 5 parts of silica powder, 8 parts of cyanite powder, 7 parts of calcium aluminate cement, 0.1 part of sodium tripolyphosphate, 0.05 part of a polycarboxylic acid water reducing agent, 6 parts of a pore-forming agent and 5 parts of high-dispersion water-soluble fibers; wherein,
the bauxite aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 50%, 25% and 25%;
the calcium titanium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 50% and 50%;
the pore-forming agent is formed by mixing floating beads and starch, wherein the weight ratio of the floating beads to the starch is 1: 1.
in the actual use process, the raw material formula of the lightweight heat-preservation castable is subjected to batching and mixing, water accounting for 5-8% of the total mass of the raw materials is added, the mixture is uniformly stirred, poured and vibrated, and a finished product is formed after maintenance and demolding.
The invention has the beneficial effects that:
1) the raw material formula of the lightweight heat-insulating castable disclosed by the invention enables the volume density of the castable to be reduced and the self weight of the ladle cover to be reduced; the heat conductivity coefficient is reduced, and the heat insulation performance of the castable is improved; the thermal shock resistance stability is improved, so that the thermal shock resistant material is suitable for the working environment with rapid cooling and rapid heating fluctuation of temperature. The product performance index reaches the volume density of less than 2.5g/cm3The thermal conductivity coefficient is less than 1.5W/mK (average 350 ℃), the thermal shock stability is more than or equal to 30 times when water cooling is carried out at 1100 ℃, and the ladle cover has the advantages of light weight, heat preservation, energy conservation, good thermal shock resistance stability and the like, can reduce the temperature drop of molten steel, improve the baking efficiency of the tundish, prolong the service life of the ladle cover, and simultaneously has low price of used raw materials and high cost performance. The industrial waste residue titanium calcium aluminate generated by smelting the ferrotitanium alloy is used as a raw material, so that the industrial solid waste is recycled.
2) The lightweight heat-insulating castable disclosed by the invention not only can prolong the service life of the ladle cover, but also can reduce the temperature drop of molten steel, improve the baking efficiency of the tundish and achieve the effects of heat insulation and energy conservation, and also adopts a waste residue processing product generated by smelting ferrotitanium-calcium titanate hollow spheres as a raw material, so that industrial solid waste is comprehensively utilized and recycled. The raw material price is low, and the cost performance is high. The method can play a demonstration role in the industry, and bring better economic and social benefits.
Detailed Description
The present invention is described in further detail below with reference to specific examples so as to be understood by those skilled in the art.
The starting materials used in the examples below were all commercially available, in which,
alumina aggregate and alumina powder, Al2O3The mass percent content is more than or equal to 70 percent, and Fe2O3The mass percentage content is less than 2.0 percent.
Particle size of alumina powderLess than 0.074 mm. In the titanium calcium aluminate hollow sphere, Al2O3The mass percent content is more than or equal to 65 percent, and Fe2O3The mass percentage content is less than 1.0 percent; the granularity of the silicon micro powder is less than 0.074 mm; the granularity of the cyanite powder is less than 0.074 mm.
Example 1
The lightweight heat-preservation castable material 1 for the tundish cover comprises, by weight, 40 parts of alumina aggregate, 10 parts of bauxite powder, 20 parts of calcium titanium aluminate hollow spheres, 5 parts of silica powder, 8 parts of sapphire powder, 7 parts of calcium aluminate cement, 0.1 part of sodium tripolyphosphate, 0.05 part of a polycarboxylic acid water reducing agent, 6 parts of floating beads and 4 parts of high-dispersion water-soluble fibers; wherein,
the alumina aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 50%, 25% and 25%;
the titanium calcium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 50% and 50%.
In the actual use process, the raw material formula of the lightweight heat-preservation castable is mixed and put into a stirrer to be uniformly mixed for 5-10 minutes, water accounting for 5-8% of the total mass of the raw materials is added, the mixture is uniformly mixed for 3-5 minutes, then the pouring and vibrating are carried out, and the finished product is formed after maintenance and demoulding.
Example 2
The lightweight heat-preservation castable 2 for the tundish cover comprises, by weight, 35 parts of alumina aggregate, 10 parts of bauxite powder, 25 parts of calcium titanium aluminate hollow spheres, 5 parts of silica powder, 8 parts of sapphire powder, 7 parts of calcium aluminate cement, 0.1 part of sodium tripolyphosphate, 0.05 part of a polycarboxylic acid water reducing agent, 6 parts of plastic and 4 parts of high-dispersion water-soluble fibers; wherein,
the alumina aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 57%, 23% and 20%;
the titanium calcium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 48% and 52%.
In the actual use process, the raw material formula of the lightweight heat-preservation castable is mixed and put into a stirrer to be uniformly mixed for 5-10 minutes, water accounting for 5-8% of the total mass of the raw materials is added, the mixture is uniformly mixed for 3-5 minutes, then the pouring and vibrating are carried out, and the finished product is formed after maintenance and demoulding.
Example 3
The lightweight heat-preservation castable 3 for the tundish cover comprises, by weight, 42 parts of alumina aggregate, 10 parts of bauxite powder, 18 parts of calcium titanium aluminate hollow spheres, 5 parts of silica powder, 8 parts of sapphire powder, 7 parts of calcium aluminate cement, 0.1 part of sodium tripolyphosphate, 0.05 part of a polycarboxylic acid water reducing agent, 6 parts of starch and 4 parts of high-dispersion water-soluble fibers; wherein,
the alumina aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 48%, 24% and 28%;
the titanium calcium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 55% and 45%.
In the actual use process, the raw material formula of the lightweight heat-preservation castable is mixed, put into a stirrer and mixed uniformly for 5-10 minutes, added with water accounting for 5-8% of the total mass of the raw materials, stirred uniformly, poured and vibrated, and cured and demoulded to form a finished product.
Example 4
The lightweight heat-preservation castable 4 for the tundish cover comprises, by weight, 40 parts of alumina aggregate, 10 parts of bauxite powder, 20 parts of calcium titanium aluminate hollow spheres, 5 parts of silica powder, 8 parts of sapphire powder, 7 parts of calcium aluminate cement, 0.1 part of sodium tripolyphosphate, 0.05 part of a polycarboxylic acid water reducing agent, 6 parts of a pore-forming agent and 5 parts of high-dispersion water-soluble fibers; wherein,
the alumina aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 50%, 25% and 25%;
the titanium calcium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 50% and 50%.
The pore-forming agent is formed by mixing floating beads and starch, wherein the weight ratio of the floating beads to the starch is 1: 1.
In the actual use process, the raw material formula of the lightweight heat-preservation castable is mixed, put into a stirrer and mixed uniformly for 5-10 minutes, added with water accounting for 5-8% of the total mass of the raw materials, stirred uniformly, poured and vibrated, and cured and demoulded to form a finished product.
Example 5
The lightweight heat-preservation castable 5 for the tundish cover comprises, by weight, 32 parts of alumina aggregate, 10 parts of bauxite powder, 28 parts of calcium titanium aluminate hollow spheres, 5 parts of silica powder, 8 parts of sapphire powder, 7 parts of calcium aluminate cement, 0.1 part of sodium tripolyphosphate, 0.05 part of a polycarboxylic acid water reducing agent, 6 parts of a pore-forming agent and 4 parts of high-dispersion water-soluble fibers; wherein,
the alumina aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 62.5%, 22% and 15.5%;
the titanium calcium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 46% and 54%;
the pore-forming agent is formed by mixing plastic and starch, wherein the weight ratio of the plastic to the starch is 1: 1.
In the actual use process, the raw material formula of the lightweight heat-preservation castable is mixed, put into a stirrer and mixed uniformly for 5-10 minutes, added with water accounting for 5-8% of the total mass of the raw materials, stirred uniformly, poured and vibrated, and cured and demoulded to form a finished product.
Example 6
The lightweight heat-preservation castable 6 for the tundish cover comprises 65 parts of alumina aggregate, 5 parts of bauxite powder, 10 parts of calcium titanium aluminate hollow spheres, 10 parts of silica powder, 5 parts of sapphire powder, 10 parts of calcium aluminate cement, 0.05 part of sodium tripolyphosphate, 0.05 part of a polycarboxylic acid water reducing agent, 5 parts of a pore-forming agent and 3 parts of high-dispersion water-soluble fiber in parts by weight; wherein,
the alumina aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 65%, 20% and 15%;
the titanium calcium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 40% and 60%;
the pore-forming agent is formed by mixing plastic and starch, wherein the weight ratio of the floating beads to the starch is 1: 1.
In the actual use process, the raw material formula of the lightweight heat-preservation castable is mixed, put into a stirrer and mixed uniformly for 5-10 minutes, added with water accounting for 5-8% of the total mass of the raw materials, stirred uniformly, poured and vibrated, and cured and demoulded to form a finished product.
Example 7
The lightweight heat-preservation castable 7 for the tundish cover comprises, by weight, 25 parts of alumina aggregate, 25 parts of bauxite powder, 30 parts of calcium titanium aluminate hollow spheres, 3 parts of silica powder, 5 parts of sapphire powder, 5 parts of calcium aluminate cement, 0.05 part of sodium tripolyphosphate, 0.05 part of a polycarboxylic acid water reducing agent, 10 parts of starch and 3 parts of high-dispersion water-soluble fibers; wherein,
the alumina aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 40%, 30% and 30%;
the titanium calcium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 60% and 40%;
in the actual use process, the raw material formula of the lightweight heat-preservation castable is mixed, put into a stirrer and mixed uniformly for 5-10 minutes, added with water accounting for 5-8% of the total mass of the raw materials, stirred uniformly, poured and vibrated, and cured and demoulded to form a finished product.
Example 8
The lightweight heat-preservation castable 8 for the tundish cover comprises 55 parts of alumina aggregate, 15 parts of bauxite powder, 30 parts of calcium titanium aluminate hollow spheres, 5 parts of silica powder, 7 parts of sapphire powder, 10 parts of calcium aluminate cement, 0.1 part of sodium tripolyphosphate, 0.1 part of a polycarboxylic acid water reducing agent, 7 parts of plastic and 5 parts of high-dispersion water-soluble fiber in parts by weight; wherein,
the alumina aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 50%, 20% and 30%;
the titanium calcium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 50% and 50%;
the pore-forming agent is formed by mixing plastic and starch, wherein the weight ratio of the floating beads to the starch is 1: 1.
In the actual use process, the raw material formula of the lightweight heat-preservation castable is mixed, put into a stirrer and mixed uniformly for 5-10 minutes, added with water accounting for 5-8% of the total mass of the raw materials, stirred uniformly, poured and vibrated, and cured and demoulded to form a finished product.
Example 9
The lightweight heat-preservation castable material 9 for the tundish cover comprises, by weight, 30 parts of alumina aggregate, 5 parts of bauxite powder, 30 parts of calcium titanium aluminate hollow spheres, 6 parts of silica powder, 10 parts of sapphire powder, 7 parts of calcium aluminate cement, 0.08 part of sodium tripolyphosphate, 0.08 part of a polycarboxylic acid water reducing agent, 5 parts of a pore-forming agent and 3 parts of high-dispersion water-soluble fiber; wherein,
the alumina aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 50%, 30% and 20%;
the titanium calcium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 50% and 50%;
the pore-forming agent is formed by mixing plastic and starch, wherein the weight ratio of the plastic to the starch is 1: 1.
In the actual use process, the raw material formula of the lightweight heat-preservation castable is mixed, put into a stirrer and mixed uniformly for 5-10 minutes, added with water accounting for 5-8% of the total mass of the raw materials, stirred uniformly, poured and vibrated, and cured and demoulded to form a finished product.
Other parts not described in detail are prior art. Although the present invention has been described in detail with reference to the above embodiments, it is only a part of the embodiments of the present invention, not all of the embodiments, and other embodiments can be obtained without inventive step according to the embodiments, and the embodiments are within the scope of the present invention.
Claims (9)
1. The utility model provides a lightweight heat preservation pouring material for pouring basket be built by contract which characterized in that: the lightweight heat-insulating castable comprises, by weight, 25-65 parts of alumina aggregate, 5-25 parts of bauxite powder, 10-30 parts of calcium titanium aluminate hollow spheres, 3-10 parts of silica powder, 5-10 parts of cyanite powder, 5-10 parts of calcium aluminate cement, 0.05-0.1 part of sodium tripolyphosphate, 0.05-0.1 part of polycarboxylic acid water reducing agent, 5-10 parts of pore forming agent and 3-10 parts of high-dispersion water-soluble fiber.
2. The lightweight insulating castable for tundish covers according to claim 1, wherein: the lightweight heat-insulating castable comprises, by weight, 30-55 parts of alumina aggregate, 5-15 parts of bauxite powder, 15-30 parts of calcium titanium aluminate hollow spheres, 4-6 parts of silica powder, 7-10 parts of cyanite powder, 7-10 parts of calcium aluminate cement, 0.05-0.1 part of sodium tripolyphosphate, 0.05-0.1 part of polycarboxylic acid water reducing agent, 5-7 parts of pore forming agent and 3-5 parts of high-dispersion water-soluble fiber.
3. The lightweight insulating castable for tundish covers according to claim 1, wherein: in the alumina aggregate and the alumina powder, Al2O3The mass percent content is more than or equal to 70 percent, and Fe2O3The mass percentage content is less than 2.0 percent.
4. The lightweight insulating castable for tundish covers according to claim 1, wherein: the bauxite aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 40-65%, 20-30% and 15-30%; the granularity of the bauxite powder is less than 0.074 mm.
5. The lightweight insulating castable for tundish covers according to claim 1 or 2, wherein: in the titanium calcium aluminate hollow sphere, Al2O3The mass percent content is more than or equal to 65 percent, and Fe2O3The mass percentage content is less than 1.0 percent; the calcium titanium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 40-60% and 40-60%.
6. The lightweight insulating castable for tundish covers according to claim 1, wherein: the granularity of the silicon micro powder is less than 0.074 mm; the granularity of the cyanite powder is less than 0.074 mm.
7. The lightweight insulating castable for tundish covers according to claim 1, wherein: the composite pore-forming agent is selected from floating beads, plastics and starch.
8. The lightweight insulating castable for tundish covers according to claim 7, wherein: the pore-forming agent is formed by mixing starch and floating beads/plastic, wherein the weight ratio of the starch to the floating beads/plastic is 1: 1-2.
9. The lightweight insulating castable for tundish covers according to claim 1, wherein: the lightweight heat-insulating castable comprises the following raw materials, by weight, 40 parts of alumina aggregate, 10 parts of alumina powder, 20 parts of calcium titanium aluminate hollow spheres, 5 parts of silica powder, 8 parts of sapphire powder, 7 parts of calcium aluminate cement, 0.1 part of sodium tripolyphosphate, 0.05 part of a polycarboxylic acid water reducing agent, 6 parts of a pore forming agent and 5 parts of high-dispersion water-soluble fibers; wherein,
the bauxite aggregate is divided into the following components according to the granularity: the grain size is more than 3mm and less than or equal to 5mm, more than 1mm and less than or equal to 3mm, and more than 0 and less than or equal to 1mm, the weight percentage is respectively as follows: 50%, 25% and 25%;
the calcium titanium aluminate hollow spheres are divided into the following components according to the particle size: the grain size is more than 1mm and less than or equal to 3mm, and the grain size is more than 0 and less than or equal to 1 mm; the weight percentages are respectively as follows: 50% and 50%;
the pore-forming agent is formed by mixing floating beads and starch, wherein the weight ratio of the floating beads to the starch is 1: 1.
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