CN107235718A - It is a kind of for new aggregate of castable and preparation method thereof - Google Patents
It is a kind of for new aggregate of castable and preparation method thereof Download PDFInfo
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- CN107235718A CN107235718A CN201710357948.6A CN201710357948A CN107235718A CN 107235718 A CN107235718 A CN 107235718A CN 201710357948 A CN201710357948 A CN 201710357948A CN 107235718 A CN107235718 A CN 107235718A
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- 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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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/628—Coating the powders or the macroscopic reinforcing agents
- C04B35/62802—Powder coating materials
- C04B35/62805—Oxide ceramics
- C04B35/6281—Alkaline earth metal oxides
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/628—Coating the powders or the macroscopic reinforcing agents
- C04B35/62802—Powder coating materials
- C04B35/62805—Oxide ceramics
- C04B35/62813—Alumina or aluminates
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- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/628—Coating the powders or the macroscopic reinforcing agents
- C04B35/62802—Powder coating materials
- C04B35/62805—Oxide ceramics
- C04B35/62826—Iron group metal oxides
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3205—Alkaline earth oxides or oxide forming salts thereof, e.g. beryllium oxide
- C04B2235/3206—Magnesium oxides or oxide-forming salts thereof
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/327—Iron group oxides, their mixed metal oxides, or oxide-forming salts thereof
- C04B2235/3272—Iron oxides or oxide forming salts thereof, e.g. hematite, magnetite
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Abstract
The invention discloses a kind of for new aggregate of castable and preparation method thereof, the new aggregate is mainly formed in the way of cladding, because the core matrix of selection is different with covering material, it is prepared into new aggregate also will difference.The present invention is tested mainly using corundum in granules or alumina particle as carrier by the covering material for adhering to unlike material.Preparation method mainly has following steps：It is one or more such as MgO, Cr in particle surface attachment2O3、Al2O3、Fe2O3、ZrO2Or slurry prepared by the different oxides such as rare-earth oxide, 3~10h then is burnt till through 1100 DEG C~1900 DEG C high temperature, new aggregate is obtained.The features such as new aggregate that the present invention is provided has stable performance, abundant raw material, can reduce the preparation cost of castable while performance is improved.
Description
Technical field
The present invention relates to fire resisting material field, and in particular to a kind of for new aggregate of castable and preparation method thereof.
Background technology
Refractory material is the indispensable material of human use's heat energy institute, is widely used in steel and Non-ferrous Metallurgy
The industry such as industry, machine building industry, building materials industry, ceramics, glass industry, chemistry and petroleum industry, electronics industry and kiln.
In unshape refractory, aggregate accounts for nearly 70% ratio, and usage amount is very big, and the use of most of unshape refractory
Environment temperature is up to more than 1500 DEG C, it is necessary to using the higher high-purity aggregate of refractoriness, such as plate diamond spar, fused white corundum
Deng due to current energy-conserving and environment-protective, the opening of the new policy such as resources conservation so that a large amount of cost of material progressively raise up, and exploitation is new
Type raw material has become at present inevitably trend.
From the point of view of the developing state of countries in the world refractory material, because unshape refractory has production simple, equipment is thrown
Enter few, efficiency high, furnace lining globality is good with air-tightness, it is easy to the advantages of repairing and quickly grow.In developed country, it is whole
Proportion is more than 50% in fire resisting material field, up to 60~70% level having.If realizing unsetting fire proofed wood
Lighting, heat-insulating and energy-saving high efficiency and the high life of material, then it may replace some setting insulating products or even some be used in non-hold
Weight position compact refractory material.
The content of the invention
The invention provides a kind of for new aggregate of castable and preparation method thereof, the new aggregate properties are steady
Determine, bulk density is low, performance is superior, abundant raw material, can effectively save raw material, reduce castable cost, optimization is poured
Material feeding performance.
A kind of new aggregate for castable, the new aggregate is core shell structure, and its center is corundum in granules or alum
Soil particle, shell is MgO, Cr2O3、Al2O3、Fe2O3、ZrO2, at least one of rare-earth oxide, between core and shell
React the transition zone of generation at high temperature for core material and shell material.
The new aggregate that the present invention is provided is approximately core shell structure, and different materials, and core and shell is respectively adopted from shell in core
Between by transition zone carry out transition, graded is presented in chemical composition and thing phase composition.
Preferably, at least including MgO in the raw material of the shell.
Preferably, the rare-earth oxide is Y2O3、Ce2O3Or La2O3.Two kinds of different rare-earth oxides
It is considered two kinds of materials.
Preferably, the core is corundum in granules or vanadine particle, the shell is MgO.
The bulk density of the new aggregate is relatively small, can effectively reduce refractory material weight, mitigates operation pressure,
Reduce use cost.
Preferably, bulk density≤3.5g/cm of the corundum in granules or alumina particle3。
Preferably, the high temperature is 1100 DEG C~1900 DEG C.At high temperature, corundum in granules or alumina particle and shell are former
The oxide reaction that material is used, generates transition zone.Temperature is different and different according to shell raw material, and selected temperature at least ensures just
With shell raw material oxidation reaction can occur for beautiful particle or alumina particle.
The property of transition zone is all different from core and shell, and effective connection on the one hand can be played to core and shell and is made
With；On the other hand, the performance of new aggregate can also be influenceed, spinelle or solid solution that transition zone is primarily formed etc. can be according to not
Used with occasion in different regions, while spinelle or solid solution exist as complex phase, material can be improved to a certain extent
Thermal shock resistance and corrosion resistance.
Present invention also offers a kind of preparation method of the described new aggregate for castable, comprise the following steps：
Shell raw material slurry is covered in corundum in granules or alumina particle surface, 3 are burnt till at a temperature of 1100 DEG C~1900 DEG C
~10h, obtains described new aggregate.
The grain diameter of corundum in granules or alumina particle is selected as needed, for example, 15-10mm, 10-5mm, 5-
3mm or other desired size distributions, the chemical composition of the corundum：Al2O3>=90%, SiO2≤ 2.0%, CaO≤2.0%,
R2O≤1.0%, R is alkali metal；The chemical composition of the alumina：Al2O3>=80%, SiO2≤ 3.0%, CaO≤2.0%, R2O
≤ 1.0%, R are alkali metal.
Described cover can be using modes such as hanging, coating or turbine stirrings.It is described burn till can in saggar tunnel cave or
Carried out in rotary kiln.
Preferably, grain diameter >=0.5mm of the corundum in granules or alumina particle.
Preferably, the shell raw material slurry is dispersed in water by shell material powder and obtained.
The particle diameter of shell material powder be difficult it is excessive, preferably, at least 95% mass point in the shell material powder
Several powders can pass through 325 mesh (Taylor system) screen cloth.
The particle diameter of shell material powder is small, can increase specific surface area, increase and the reaction of corundum in granules or alumina particle
Probability.Preferably, the mass fraction of shell material powder is 15~60% in the shell raw material slurry.
On the one hand the concentration of shell raw material slurry influence the effect of hanging, on the other hand can also influence the shell after burning till
Phase structure.Further preferably, the mass fraction of shell material powder is 30~60% in shell raw material slurry.Further preferably, shell
The mass fraction of shell material powder is 30~50% in layer raw material slurry.
Preferably, the attachment thickness of the corundum in granules or alumina particle surface slurry is 0.1~5mm.It is further excellent
The attachment thickness of choosing, the corundum in granules or alumina particle surface slurry is 0.5~4mm.Further preferably, the corundum in granules or alum
The attachment thickness of soil particle surface slurry is 1~3mm.
The thickness that covers of shell raw material slurry directly affects and burns till the thing phase developmental state that rear core-shell structure respectively constitutes position,
Therefore, coating thickness need it is suitable, can be according to coating thickness being adjusted the need for actual use, to meet different occasions
Performance requirement.
Provided by the present invention for castable new aggregate properties it is stable, bulk density is low, performance is superior, raw material
It is abundant, raw material can be effectively saved, castable cost is reduced, optimizes castable performance.
Brief description of the drawings
Structural representations of the Fig. 1 for the present invention for the new aggregate of castable.
Embodiment
Embodiment 1
A kind of preparation method of new aggregate for castable, specific implementation step is as follows：
(1) MgO powders are dispersed in water and are configured to MgO slurries, the mass fraction of MgO powders is 25% in MgO slurries,
The powder of 95% mass fraction can pass through 325 eye mesh screens in MgO powders.
(2) MgO slurries are covered on alumina particle surface by the way of hanging, i.e., particle is immersed in MgO slurries, stopped
Stay and take out in a moment, one layer of MgO slurry is wrapped on alumina particle surface, the thickness of MgO layer of slurry is about 1mm.
(3) alumina particle for being wrapped with MgO layer of slurry is placed in saggar tunnel cave, burns till 5h at a temperature of 1750 DEG C, obtain
To new aggregate.
Performance characterization
Chemical composition is detected
As shown in figure 1, aggregate is divided into three layers in the present embodiment, core c, transition zone b and shell a are followed successively by from the inside to the outside, its
In, shell mainly plays the erosion-resistant protective effect of anti-slag to core, and transition zone is mainly the blending constituent of core and shell, played
Transitional function is wrapped up core.Core, transition zone and shell are separated, chemical detection is carried out respectively, testing result is such as
Shown in table 1.
Table 1
Core is typical alumina aggregate chemical composition, and principal component is aluminum oxide, and transition zone is that aluminum oxide and magnesia are mixed
Thing, shell is aluminum oxide and magnesia mixture.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result
As shown in table 2.
Table 2
The principal crystalline phase of core is corundum and mullite, and the principal crystalline phase of transition zone is aluminium riched spinel, and shell is spinelle.
Embodiment 2
A kind of preparation method of new aggregate for castable, specific implementation step is as follows：
(1) by MgO powders and Fe2O3Powder is with 10：1 weight ratio, which is dispersed in water, is configured to slurry, powder in slurry
Total mass fraction is 25%, and the powder of 95% mass fraction can pass through 325 eye mesh screens in whole powders.
(2) covered by the way of hanging on alumina particle surface and contain MgO and Fe2O3Slurry, i.e., particle is immersed in
In slurry, stop is taken out in a moment, and one layer is wrapped on alumina particle surface and contains MgO and Fe2O3Slurry, the thickness of layer of slurry
About 1mm.
(3) alumina particle for being wrapped with layer of slurry is placed in saggar tunnel cave, 5h is burnt till at a temperature of 1750 DEG C, obtain new
Type aggregate.
Chemical composition is detected
Aggregate structure be the same as Example 1, separates to the core of aggregate, transition zone and shell in the present embodiment, enters respectively
Row chemical detection, testing result is as shown in table 3.
Table 3
Core is alumina chemical composition, and principal component is aluminum oxide, and transition zone is aluminum oxide and magnesia, shell be aluminum oxide,
Magnesia and di-iron trioxide.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result
As shown in table 4.
Table 4
The principal crystalline phase of core is corundum and mullite, and the principal crystalline phase of transition zone is magnesium aluminate spinel, ferro-magnesium-aluminum spinelle, α-oxygen
Change aluminium, mullite, shell is magnesium aluminate spinel, ferro-magnesium-aluminum spinelle, Alpha-alumina.
Embodiment 3
A kind of preparation method of new aggregate for castable, specific implementation step is as follows：
(1) MgO powders are dispersed in water and are configured to MgO slurries, the mass fraction of MgO powders is 25% in MgO slurries,
The powder of 95% mass fraction can pass through 325 eye mesh screens in MgO powders.
(2) MgO slurries are covered on corundum in granules surface by the way of hanging, i.e., particle is immersed in MgO slurries, stopped
Stay and take out in a moment, one layer of MgO slurry is wrapped on corundum in granules surface, the thickness of MgO layer of slurry is about 1mm.
(3) corundum in granules for being wrapped with MgO layer of slurry is placed in saggar tunnel cave, burns till 5h at a temperature of 1750 DEG C, obtain
To new aggregate.
Performance characterization
Chemical composition is detected
Aggregate structure be the same as Example 1, separates to the core of aggregate, transition zone and shell in the present embodiment, enters respectively
Row chemical detection, testing result is as shown in table 5.
Table 5
The main chemical composition of core is Alpha-alumina, and transition zone is aluminum oxide and magnesia, and shell is aluminum oxide and magnesia.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result
As shown in table 6.
Table 6
Core is typical aluminum oxide mineral facies, and the principal crystalline phase of transition zone is spinelle and Alpha-alumina, and shell is spinelle.
Embodiment 4
A kind of preparation method of new aggregate for castable, specific implementation step is as follows：
(1) by ZrO2Powder and MgO powders are with 1：10 weight ratio, which is dispersed in water, is configured to slurry, powder in slurry
Total mass fraction is 25%, and the powder of 95% mass fraction can pass through 325 eye mesh screens in whole powders.
(2) covered by the way of hanging on corundum in granules surface and contain ZrO2With MgO slurry, i.e., particle is immersed in
In slurry, stop is taken out in a moment, and wrapping one layer on corundum in granules surface contains ZrO2With MgO slurry, the thickness of layer of slurry
About 1mm.
(3) corundum in granules for being wrapped with layer of slurry is placed in saggar tunnel cave, 5h is burnt till at a temperature of 1750 DEG C, obtain new
Type aggregate.
Performance characterization
Chemical composition is detected
New aggregate structure be the same as Example 1, is separated to the core of aggregate, transition zone and shell in the present embodiment, point
Chemical detection is not carried out, and testing result is as shown in table 7.
Table 7
Core be typical corundum aggregate chemical composition, transition zone be aluminum oxide, zirconium oxide and magnesia, shell it is main chemistry into
It is divided into aluminum oxide, zirconium oxide and magnesia.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result
As shown in table 8.
Table 8
The principal crystalline phase of core is corundum, and the principal crystalline phase of transition zone is magnesium-aluminum-zirconium complex phase spinelle, Alpha-alumina, and shell is magnalium
Zirconium complex phase spinelle, magnesium aluminate spinel, Alpha-alumina.
Embodiment 5
A kind of preparation method of new aggregate for castable, specific implementation step is as follows：
(1) by Cr2O3Powder and MgO powders are with 1：10 weight ratio, which is dispersed in water, is configured to slurry, powder in slurry
Total mass fraction is 25%, and the powder of 95% mass fraction can pass through 325 eye mesh screens in whole powders.
(2) covered by the way of hanging on corundum in granules surface and contain Cr2O3With MgO slurry, i.e., particle is immersed in
In slurry, stop is taken out in a moment, and wrapping one layer on corundum in granules surface contains Cr2O3With MgO slurry, the thickness of layer of slurry
About 1mm.
(3) corundum in granules for being wrapped with layer of slurry is placed in saggar tunnel cave, 5h is burnt till at a temperature of 1750 DEG C, obtain new
Type aggregate.
Performance characterization
Chemical composition is detected
Aggregate structure be the same as Example 1, separates to the core of aggregate, transition zone and shell in the present embodiment, enters respectively
Row chemical detection, testing result is as shown in table 9.
Table 9
Core be typical corundum aggregate chemical composition, transition zone be aluminum oxide, chromium oxide and magnesia, shell it is main chemistry into
It is divided into aluminum oxide, chromium oxide and magnesia.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result
As shown in table 10.
Table 10
The principal crystalline phase of core is corundum, and the principal crystalline phase of transition zone is magnesium-aluminum-zirconium complex phase spinelle, magnesium aluminate spinel, alpha-oxidation
Aluminium, shell is magnesium-aluminum-zirconium complex phase spinelle, magnesium aluminate spinel, Alpha-alumina.
Embodiment 6
A kind of preparation method of new aggregate for castable, specific implementation step is as follows：
(1) by La2O3Powder and MgO powders are with 1：20 weight ratio, which is dispersed in water, is configured to slurry, powder in slurry
Total mass fraction is 25%, and the powder of 95% mass fraction can pass through 325 eye mesh screens in whole powders.
(2) covered by the way of hanging on corundum in granules surface and contain La2O3With MgO slurry, i.e., particle is immersed in
In slurry, stop is taken out in a moment, and wrapping one layer on corundum in granules surface contains La2O3With MgO slurry, the thickness of layer of slurry
About 1mm.
(3) corundum in granules for being wrapped with layer of slurry is placed in saggar tunnel cave, 5h is burnt till at a temperature of 1750 DEG C, obtain new
Type aggregate.
Performance characterization
Chemical composition is detected
Aggregate structure be the same as Example 1, separates to the core of aggregate, transition zone and shell in the present embodiment, enters respectively
Row chemical detection, testing result is as shown in table 11.
Table 11
Core is typical corundum aggregate chemical composition, and transition zone is aluminum oxide and magnesia, and the main chemical composition of shell is oxygen
Change aluminium and magnesia.
Material phase analysis
The core of aggregate, transition zone and shell in the present embodiment are separated, thing is carried out respectively and is mutually detected, testing result
As shown in table 12.
Table 12
The principal crystalline phase of core is corundum, and the principal crystalline phase of transition zone is spinelle, Alpha-alumina, and shell is spinelle.
Comparison study
The weight of each sample is shown in Table 13, table 14, table 15, wherein, the chemical composition of bimodal alumina powder：Al2O3
>=99.3%, K2O+Na2O≤0.10%；Particle diameter：D50≤ 3.2 μm, D90≤ 10 μm, bimodal distribution；SiO2The particle diameter of micro mist：D50
≤2μm；Additive uses polycarboxylate water-reducer.
As shown in table 13 as the castable of aggregate proportioning using alumina, this sample is designated as A.
Table 13
As shown in the table as the castable of aggregate proportioning using plate diamond spar, this sample is designated as B.
Table 14
The castable proportioning of the new aggregate as the aggregate that are prepared using embodiment 1~6 is as shown in Table 15, specimen coding C1, C2,
C3, C4, C5, C6 are respectively the castable sample that the new aggregate prepared using embodiment 1,2,3,4,5,6 is made.
Table 15
The performance characterization result of sample is as shown in table 16.
Table 16
As can be seen from Table 16, the performance of castable can be improved using new aggregate, for example, in reduction amount of water
While improve mobility, improve physical property etc..
Claims (9)
1. a kind of new aggregate for castable, it is characterised in that the new aggregate is core shell structure, its center is corundum
Particle or alumina particle, shell are MgO, Cr2O3、Al2O3、Fe2O3、ZrO2, at least one of rare-earth oxide, core with
React the transition zone of generation between shell at high temperature for core material and shell material.
2. it is used for the new aggregate of castable as claimed in claim 1, it is characterised in that the corundum in granules or alumina particle
Bulk density≤3.5g/cm3。
3. as claimed in claim 1 or 2 be used for castable new aggregate, it is characterised in that the high temperature be 1100 DEG C~
1900℃。
4. a kind of preparation method of new aggregate for castable as described in any one of claims 1 to 3, its feature exists
In comprising the following steps：
Shell raw material slurry is covered in corundum in granules or alumina particle surface, burn till 3 at a temperature of 1100 DEG C~1900 DEG C~
10h, obtains described new aggregate.
5. it is used for the preparation method of the new aggregate of castable as claimed in claim 4, it is characterised in that the shell raw material
Slurry is dispersed in water by shell material powder and obtained.
6. it is used for the preparation method of the new aggregate of castable as claimed in claim 5, it is characterised in that the shell raw material
At least the powder of 95% mass fraction can pass through 325 eye mesh screens in powder.
7. it is used for the preparation method of the new aggregate of castable as claimed in claim 5, it is characterised in that the shell raw material
The mass fraction of shell material powder is 15~60% in slurry.
8. it is used for the preparation method of the new aggregate of castable as claimed in claim 4, it is characterised in that the corundum in granules
Or the attachment thickness of alumina particle surface slurry is 0.1~5mm.
9. it is used for the preparation method of the new aggregate of castable as claimed in claim 4, it is characterised in that the corundum in granules
Or grain diameter >=0.5mm of alumina particle.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979294A (en) * | 2021-03-17 | 2021-06-18 | 中南大学 | Waste sagger repairing coating and using method thereof |
| CN114276126A (en) * | 2022-01-05 | 2022-04-05 | 浙江自立高温科技股份有限公司 | Carbon-free aluminum-magnesium mechanical pressed brick with excellent thermal shock resistance and erosion resistance and preparation method thereof |
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| CN112979294B (en) * | 2021-03-17 | 2022-05-06 | 中南大学 | Waste sagger repairing coating and using method thereof |
| CN114276126A (en) * | 2022-01-05 | 2022-04-05 | 浙江自立高温科技股份有限公司 | Carbon-free aluminum-magnesium mechanical pressed brick with excellent thermal shock resistance and erosion resistance and preparation method thereof |
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