CN105622122B - A kind of ultra micro kyanite refractory casting and its application - Google Patents
A kind of ultra micro kyanite refractory casting and its application Download PDFInfo
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- CN105622122B CN105622122B CN201610072456.8A CN201610072456A CN105622122B CN 105622122 B CN105622122 B CN 105622122B CN 201610072456 A CN201610072456 A CN 201610072456A CN 105622122 B CN105622122 B CN 105622122B
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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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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B2235/9669—Resistance against chemicals, e.g. against molten glass or molten salts
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Abstract
The invention belongs to fire resisting material fields, a kind of ultra micro kyanite refractory casting material, its component and weight fraction include alumine aggregate 47~80%, alumina powder 10~40%, additive 0.05~3% and ultra micro kyanite 3~10%, the ultra micro kyanite is alumina content >=50%, kyanite phase >=70%, granularity≤10 μm.By pre-mixed technology, ultra micro kyanite is blended with α-Al2O3 and sub-white corundum powder, can be dispersed in matrix；It is to disperse structure both shrinks caused by the structure expansion that kyanite occurs after 1250 DEG C is offset because of alumina high-temperature shrinkage or aluminum-resistant aggressive agent pyrolytic by high uniformity that it, which is acted on,.Ultra micro kyanite has been used, because the aluminum-resistant erosion performance of cubical expansivity < 3%, kyanite is high as partial size is decreased to 5 μm, the aluminum-resistant erosion performance of refractory lining material can have been greatly improved in the case where keeping identical amount of water and mobility.
Description
Technical field
The invention belongs to fire resisting material field more particularly to a kind of ultra micro kyanite refractory casting material and its applications.
Background technique
Aluminium and aluminum alloy melt casting equipment liner with high alumina refractory casting material be with high-alumina refractory aggregate, alumina powder,
Conclude agent and additive to synthesize by certain ratio.It possesses that high-temperature behavior is good, refractoriness is high, the characteristics such as wear-resistant, is widely applied
In industries such as hardware, smelting, chemical industry, non-ferrous metals.Currently, the production method of high alumina refractory casting material mainly uses high alumina
Bauxite clinker, alumina powder, silica powder and bonding agent mix appropriate form.Since though bauxite chamotte is through being burnt into,
Reach sintering equilibrium state far away, in later thermal histories, still has the tendency that never equilibrium state is to final equilibrium state transition, body
Product density decline, this will lead to biggish volume contraction, cause the cracking of castable refractory.
Further, since the aluminium and molten aluminium alloy of high-temperature fusion have very strong erosion and osmotic energy to refractory lining material
Power, therefore, adding aluminum-resistant aggressive agent in high alumina refractory casting material has been widespread practice, but aluminum-resistant used at present is invaded
Erosion agent will decompose at 800~1300 DEG C, on the one hand, with the raising for using temperature, decline its aluminum-resistant erosiveness
Or disappear, on the other hand, since material is decomposed, cause overall structure loose, intensity decline, cracking can be more serious.This
Directly affect the service life of castable refractory.
Summary of the invention
The purpose of the present invention is overcoming the prior art to have the defects that castable refractory is easy cracking, it is blue to provide a kind of ultra micro
Spar refractory casting material and its application.
The technical solution adopted by the present invention to solve the technical problems is: a kind of ultra micro kyanite refractory casting material,
Component and weight fraction include alumine aggregate 47~80%, alumina powder 10~40%, additive 0.05~3% and surpass
Micro- kyanite 3~10%, the ultra micro kyanite are alumina content >=50%, kyanite phase >=70%, granularity≤10 μm.
Further, aluminium weight percentage >=75% in the alumine aggregate, grain size distribution composition are as follows:
Granularity is that the alumine aggregate of 3~5mm accounts for the 15~40% of alumine aggregate and alumina powder quality sum, and granularity is
The alumine aggregate of 1~3mm accounts for the 10~40% of blast furnace alumina aggregate and alumina powder quality sum, and granularity is 0~1mm
Alumine aggregate account for the 0~30% of blast furnace alumina aggregate and alumina powder quality sum.
Preferably, the alumine aggregate that granularity is 3~5mm accounts for alumine aggregate and alumina powder quality sum
30~40%, the alumine aggregate that granularity is 1~3mm account for blast furnace alumina aggregate and alumina powder quality sum 20~
30%, granularity is that the alumine aggregate of 0~1mm accounts for the 10~20% of blast furnace alumina aggregate and alumina powder quality sum.
Further, the alumina powder composition is as follows: Al2O3Mass percentage >=99%, granularity≤320 purposes
α-Al2O3Account for the 1~10% of alumine aggregate and alumina powder quality sum；Al2O3Mass percentage >=98%, grain
The sub-white corundum powder of≤320 mesh of degree accounts for the 3~8% of alumine aggregate and alumina powder quality sum；Al2O3Quality percentage
The aluminous cement of content >=50% accounts for the 5~20% of alumine aggregate and alumina powder quality sum；BaSO4Quality hundred
Divide content >=95%, granularity≤200 mesh barium sulfate accounts for the 2~7% of alumine aggregate and alumina powder quality sum.
Preferably, the alumina powder composition is as follows: Al2O3Mass percentage >=99%, granularity≤320 purposes
α-Al2O3Account for the 6~8% of alumine aggregate and alumina powder quality sum；Al2O3Mass percentage >=98%, granularity
The sub-white corundum powder of≤320 mesh accounts for the 4~5% of alumine aggregate and alumina powder quality sum；Al2O3Quality percentage contains
The aluminous cement of amount >=50% accounts for the 5~7% of alumine aggregate and alumina powder quality sum；BaSO4Quality percentage
Content >=95%, granularity≤200 mesh barium sulfate account for the 5~7% of alumine aggregate and alumina powder quality sum.
Preferably, the additive is sodium tripolyphosphate, sodium hexametaphosphate, citric acid, sodium aluminate, naphthalene system diminishing
One of agent, sodium pyrophosphate, sodium tetrapolyphosphate, sodium metasilicate are a variety of.
Preferably, the ultra micro kyanite granularity is 5 μm.
The upper ultra micro kyanite refractory casting material is used for the application of the production of prefabricated component, steps are as follows:
(1) ultra micro kyanite is blended in high-speed mixer with α-Al2O3 and sub-white corundum powder, is obtained evenly dispersed
Then premixed powder is mixed with other raw materials again；
(2) water of matched castable and castable weight 3~6% is mixed in blender, stream needed for mixing casting thoroughly
Dynamic degree；
(3) material being stirred is placed in casting, vibration shaping in mold；
(4) maintenance is demoulded after curing in the mold；
(5) enter furnace and carry out baking by prefabricated component baking temperature increasing schedule；
(6) it comes out of the stove, examine, packing, being transported to user scene, installation, coming into operation after baker.
Preferably, the curing in the mold time is that for 24 hours, demoulding curing time is 72h or more.
Above-mentioned ultra micro kyanite refractory casting material is used for the application of cast-in-site refractory lining, steps are as follows:
(1) ultra micro kyanite is blended in high-speed mixer with α-Al2O3 and sub-white corundum powder, is obtained evenly dispersed
Then premixed powder is mixed with other raw materials again；
(2) water of matched castable and castable weight 3~6% is mixed in blender, stream needed for mixing casting thoroughly
Dynamic degree；
(3) material being stirred is placed in casting, vibration shaping in mold；
(4) curing in the mold, demoulding conserve 72h or more, press baker temperature increasing schedule baking, then come into operation.
The utility model has the advantages that the object of the present invention is to provide a kind of ultra micro kyanite refractory casting materials, on the one hand, its effect is
Caused by the structure expansion occurred after 1250 DEG C by kyanite is offset because of alumina high-temperature shrinkage or aluminum-resistant aggressive agent pyrolytic
Structure both shrinks.But if using common kyanite particulate material or fine powder, since phase-change product is kyanite at high temperature
Mullite and high silica glass phase, while with 12~16% volume expansion, but general this phase transition process be it is incomplete,
It can only achieve 80% or so of theoretical value.In addition, the finely divided corundum phase in high-alumina refractory castable, heats phase transformation with kyanite
There is secondary mullite process between product high silica glass phase, this process is also accompanied by the expansion of suitable volume, although this mistake
Cheng Zhong forms continuous mullite skeleton in the structure of high-alumina refractory castable, can be improved between high temperature crystallization phase
Bind directly degree, but so huge volume expansion, the structure of refractory lining undoubtedly can be seriously destroyed, it is high temperatures to reduce its
Energy.Therefore, used ultra micro kyanite in the invention, volume expansion < 3%, by technology for premixing, by ultra micro kyanite with
α-Al2O3 and sub-white corundum powder are blended, and can be dispersed in matrix, reduce and cause high-temperature expansion because of kyanite aggregation
The short texture of formation, meanwhile, the large specific surface area of ultra micro kyanite is equal with the finely divided corundum in castable refractory to contact
Area is big, mullitization reaction sufficiently, keep mullite skeleton continuously distributed in entire inner lining structure, it reduce because volume it is swollen
It is swollen it is larger caused by structure destroy.
On the other hand, the aluminum-resistant erosion performance of kyanite is higher than silica, mullite, alumina, plate diamond spar, therefore by surpassing
Micro- kyanite substitutes part of silica micro mist, calcined bauxite in powder, plate diamond spar powder, mullite powder, and refractory lining material can be improved
Aluminum-resistant erosion performance.Wherein, although fine silica powder plays very crucial work in many low cement or ultra-low cement
With, but this has but sacrificed many high-temperature behaviors, if carrying out replacement of silicon dioxide micro mist with ultra micro kyanite, can keep
In the case where identical amount of water and mobility, the aluminum-resistant erosion performance of refractory lining material is greatly improved.
Specific embodiment
Embodiment 1
A kind of ultra micro kyanite refractory casting material, the raw material and content of the ultra micro kyanite refractory casting material are:
30% granularity is the alumine aggregate of 3~5mm；12% granularity is the alumine aggregate of 1~3mm；21% granularity
For the alumine aggregate of 0~1mm；5% ultra micro kyanite (5 μm, alumina content >=50%, kyanite phase >=70%, under
Together), 8% α-Al2O3；7% sub-white corundum powder；12% aluminous cement；4.95% barium sulfate；The six of 0.05% are partially
Sodium phosphate.(wherein aluminium weight percentage >=75% in alumine aggregate；α-Al2O3Middle Al2O3Mass percentage >=
99%, granularity≤320 mesh；L in sub-white corundum powder2O3Mass percentage >=98%, granularity≤320 mesh；In aluminous cement
Al2O3Mass percentage >=50%；BaSO in barium sulfate4Mass percentage >=95%, granularity≤200 mesh, similarly hereinafter)
By micron-sized fine powder in ultra micro kyanite and α-Al2O3 and sub-white corundum powder ingredient, the first mixing of investment taper
In the mixing machines such as machine or tilting high-speed mixer, under conditions of mixed at high speed, keep micron order fine powder that ultra micro kyanite is high
It spends evenly dispersed, obtains evenly dispersed premixed powder.Later period and other raw materials (including aggregate, fine powder, additive etc.) are common
It is remixed in investment planetary stirring machine.After mixing by each component according to the above ratio, above-mentioned mixture 5% is added
Water stirs evenly, and the material being stirred is placed in casting, vibration shaping (40mm*40mm*160mm) in mold, is placed 24 hours
After demould, then through 72 hours maintenance after, at 110 DEG C 24 hours drying and 1500 DEG C heat preservation 3 hours firing after, then according to phase
It closes national standard to be tested, gained results of property are as follows: the bulk density of 110 DEG C of * for 24 hours is 3.06-3.17g/cm3(GB/T
2999-2002), compressive resistance is 95-103MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 3.00-
3.14g/cm3(GB/T 2999-2002), compressive resistance are 155-160MPa (GB/T 5072-2008), permanent line variation is
0.6% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
25 times (YB/T 376.3-2004).
Embodiment 2
A kind of ultra micro kyanite refractory casting material, the raw material and content of the ultra micro kyanite refractory casting material are:
40% granularity is the alumine aggregate of 3~5mm；10% granularity is the alumine aggregate of 1~3mm；30% granularity
For the alumine aggregate of 0~1mm；3% ultra micro kyanite (10 μm), 1% α-Al2O3；3% sub-white corundum powder；5%
Aluminous cement；7% barium sulfate；1% calgon.
By micron-sized fine powder in ultra micro kyanite and α-Al2O3 and sub-white corundum powder ingredient, the first mixing of investment taper
In the mixing machines such as machine or tilting high-speed mixer, under conditions of mixed at high speed, keep micron order fine powder that ultra micro kyanite is high
It spends evenly dispersed, obtains evenly dispersed premixed powder.Later period and other raw materials (including aggregate, fine powder, additive etc.) are common
It is remixed in investment planetary stirring machine.After mixing by each component according to the above ratio, above-mentioned mixture 5% is added
Water stirs evenly, and the material being stirred is placed in casting, vibration shaping (40mm*40mm*160mm) in mold, is placed 24 hours
After demould, then through 72 hours maintenance after, at 110 DEG C 24 hours drying and 1500 DEG C heat preservation 3 hours firing after, then according to phase
It closes national standard to be tested, gained results of property are as follows: the bulk density of 110 DEG C of * for 24 hours is 3.00-3.13g/cm3(GB/T
2999-2002), compressive resistance is 90-99MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 2.98-
3.13g/cm3(GB/T 2999-2002), compressive resistance are 150-160MPa (GB/T 5072-2008), permanent line variation is
1.1% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
19 times (YB/T 376.3-2004).
Embodiment 3
A kind of ultra micro kyanite refractory casting material, the raw material and content of the ultra micro kyanite refractory casting material are:
17% granularity is the alumine aggregate of 3~5mm；35% granularity is the alumine aggregate of 1~3mm；11% granularity
For the alumine aggregate of 0~1mm；10% ultra micro kyanite (8 μm), 11% α-Al2O3；4% sub-white corundum powder；
7% aluminous cement；2% barium sulfate；3% sodium aluminate.
By micron-sized fine powder in ultra micro kyanite and α-Al2O3 and sub-white corundum powder ingredient, the first mixing of investment taper
In the mixing machines such as machine or tilting high-speed mixer, under conditions of mixed at high speed, keep micron order fine powder that ultra micro kyanite is high
It spends evenly dispersed, obtains evenly dispersed premixed powder.Later period and other raw materials (including aggregate, fine powder, additive etc.) are common
It is remixed in investment planetary stirring machine.After mixing by each component according to the above ratio, above-mentioned mixture 5% is added
Water stirs evenly, and the material being stirred is placed in casting, vibration shaping (40mm*40mm*160mm) in mold, is placed 24 hours
After demould, then through 72 hours maintenance after, at 110 DEG C 24 hours drying and 1500 DEG C heat preservation 3 hours firing after, then according to phase
It closes national standard to be tested, gained results of property are as follows: the bulk density of 110 DEG C of * for 24 hours is 3.10-3.20g/cm3(GB/T
2999-2002), compressive resistance is 98-106MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 3.05-
3.14g/cm3(GB/T 2999-2002), compressive resistance are 165-170MPa (GB/T 5072-2008), permanent line variation is
1.0% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
22 times (YB/T 376.3-2004).
Embodiment 4
A kind of ultra micro kyanite refractory casting material, the raw material and content of the ultra micro kyanite refractory casting material are:
15% granularity is the alumine aggregate of 3~5mm；26% granularity is the alumine aggregate of 1~3mm；8% granularity is
The alumine aggregate of 0~1mm；10% ultra micro kyanite (10 μm), 9% α-Al2O3；7% sub-white corundum powder；18%
Aluminous cement；4% barium sulfate；3% calgon.
By micron-sized fine powder in ultra micro kyanite and α-Al2O3 and sub-white corundum powder ingredient, the first mixing of investment taper
In the mixing machines such as machine or tilting high-speed mixer, under conditions of mixed at high speed, keep micron order fine powder that ultra micro kyanite is high
It spends evenly dispersed, obtains evenly dispersed premixed powder.Later period and other raw materials (including aggregate, fine powder, additive etc.) are common
It is remixed in investment planetary stirring machine.After mixing by each component according to the above ratio, above-mentioned mixture 5% is added
Water stirs evenly, and the material being stirred is placed in casting, vibration shaping (40mm*40mm*160mm) in mold, is placed 24 hours
After demould, then through 72 hours maintenance after, at 110 DEG C 24 hours drying and 1500 DEG C heat preservation 3 hours firing after, then according to phase
It closes national standard to be tested, gained results of property are as follows: the bulk density of 110 DEG C of * for 24 hours is 2.97-3.10g/cm3(GB/T
2999-2002), compressive resistance is 89-99MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 2.96-
3.06g/cm3(GB/T 2999-2002), compressive resistance are 151-155MPa (GB/T 5072-2008), permanent line variation is
0.9% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
18 times (YB/T 376.3-2004).
Embodiment 5
A kind of ultra micro kyanite refractory casting material, the raw material and content of the ultra micro kyanite refractory casting material are:
30% granularity is the alumine aggregate of 3~5mm；30% granularity is the alumine aggregate of 1~3mm；17% granularity
For the alumine aggregate of 0~1mm；10% ultra micro kyanite (5 μm), 1% α-Al2O3；2.7% sub-white corundum powder；
4.5% aluminous cement；1.8% barium sulfate；3% sodium metasilicate.
By micron-sized fine powder in ultra micro kyanite and α-Al2O3 and sub-white corundum powder ingredient, the first mixing of investment taper
In the mixing machines such as machine or tilting high-speed mixer, under conditions of mixed at high speed, keep micron order fine powder that ultra micro kyanite is high
It spends evenly dispersed, obtains evenly dispersed premixed powder.Later period and other raw materials (including aggregate, fine powder, additive etc.) are common
It is remixed in investment planetary stirring machine.After mixing by each component according to the above ratio, above-mentioned mixture 5% is added
Water stirs evenly, and the material being stirred is placed in casting, vibration shaping (40mm*40mm*160mm) in mold, is placed 24 hours
After demould, then through 72 hours maintenance after, at 110 DEG C 24 hours drying and 1500 DEG C heat preservation 3 hours firing after, then according to phase
It closes national standard to be tested, gained results of property are as follows: the bulk density of 110 DEG C of * for 24 hours is 3.10-3.20g/cm3(GB/T
2999-2002), compressive resistance is 110-120MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 3.05-
3.16g/cm3(GB/T 2999-2002), compressive resistance are 155-165MPa (GB/T 5072-2008), permanent line variation is
0.7% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
26 times (YB/T 376.3-2004).
Embodiment 6
A kind of ultra micro kyanite refractory casting material, the raw material and content of the ultra micro kyanite refractory casting material are:
23% granularity is the alumine aggregate of 3~5mm；32% granularity is the alumine aggregate of 1~3mm；20% granularity
For the alumine aggregate of 0~1mm；9% ultra micro kyanite (6 μm), 1% α-Al2O3；4% sub-white corundum powder；6%
Aluminous cement；2% barium sulfate；3% calgon.
By micron-sized fine powder in ultra micro kyanite and α-Al2O3 and sub-white corundum powder ingredient, the first mixing of investment taper
In the mixing machines such as machine or tilting high-speed mixer, under conditions of mixed at high speed, keep micron order fine powder that ultra micro kyanite is high
It spends evenly dispersed, obtains evenly dispersed premixed powder.Later period and other raw materials (including aggregate, fine powder, additive etc.) are common
It is remixed in investment planetary stirring machine.After mixing by each component according to the above ratio, above-mentioned mixture 5% is added
Water stirs evenly, and the material being stirred is placed in casting, vibration shaping (40mm*40mm*160mm) in mold, is placed 24 hours
After demould, then through 72 hours maintenance after, at 110 DEG C 24 hours drying and 1500 DEG C heat preservation 3 hours firing after, then according to phase
It closes national standard to be tested, gained results of property are as follows: the bulk density of 110 DEG C of * for 24 hours is 3.06-3.17g/cm3(GB/T
2999-2002), compressive resistance is 95-103MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 3.00-
3.14g/cm3(GB/T 2999-2002), compressive resistance are 155-160MPa (GB/T 5072-2008), permanent line variation is
0.6% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
20 times (YB/T 376.3-2004).
Embodiment 7
A kind of ultra micro kyanite refractory casting material, the raw material and content of the ultra micro kyanite refractory casting material are:
20% granularity is the alumine aggregate of 3~5mm；35% granularity is the alumine aggregate of 1~3mm；0% granularity is
The alumine aggregate of 0~1mm；4% ultra micro kyanite (8 μm), 6% α-Al2O3；8% sub-white corundum powder；18%
Aluminous cement；6% barium sulfate；3% citric acid.
By micron-sized fine powder in ultra micro kyanite and α-Al2O3 and sub-white corundum powder ingredient, the first mixing of investment taper
In the mixing machines such as machine or tilting high-speed mixer, under conditions of mixed at high speed, keep micron order fine powder that ultra micro kyanite is high
It spends evenly dispersed, obtains evenly dispersed premixed powder.Later period and other raw materials (including aggregate, fine powder, additive etc.) are common
It is remixed in investment planetary stirring machine.After mixing by each component according to the above ratio, above-mentioned mixture 5% is added
Water stirs evenly, and the material being stirred is placed in casting, vibration shaping (40mm*40mm*160mm) in mold, is placed 24 hours
After demould, then through 72 hours maintenance after, at 110 DEG C 24 hours drying and 1500 DEG C heat preservation 3 hours firing after, then according to phase
It closes national standard to be tested, gained results of property are as follows: the bulk density of 110 DEG C of * for 24 hours is 3.05-3.12g/cm3(GB/T
2999-2002), compressive resistance is 80-100MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 3.00-
3.10g/cm3(GB/T 2999-2002), compressive resistance are 110-120MPa (GB/T 5072-2008), permanent line variation is
1.0% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
16 times (YB/T 376.3-2004).
Embodiment 8
A kind of ultra micro kyanite refractory casting material, the raw material and content of the ultra micro kyanite refractory casting material are:
13% granularity is the alumine aggregate of 3~5mm；30% granularity is the alumine aggregate of 1~3mm；4% granularity is
The alumine aggregate of 0~1mm；10% ultra micro kyanite (10 μm), 9% α-Al2O3；7% sub-white corundum powder；18%
Aluminous cement；6% barium sulfate；3% sodium pyrophosphate.
By micron-sized fine powder in ultra micro kyanite and α-Al2O3 and sub-white corundum powder ingredient, the first mixing of investment taper
In the mixing machines such as machine or tilting high-speed mixer, under conditions of mixed at high speed, keep micron order fine powder that ultra micro kyanite is high
It spends evenly dispersed, obtains evenly dispersed premixed powder.Later period and other raw materials (including aggregate, fine powder, additive etc.) are common
It is remixed in investment planetary stirring machine.After mixing by each component according to the above ratio, above-mentioned mixture 5% is added
Water stirs evenly, and the material being stirred is placed in casting, vibration shaping (40mm*40mm*160mm) in mold, is placed 24 hours
After demould, then through 72 hours maintenance after, at 110 DEG C 24 hours drying and 1500 DEG C heat preservation 3 hours firing after, then according to phase
It closes national standard to be tested, gained results of property are as follows: the bulk density of 110 DEG C of * for 24 hours is 3.00-3.05g/cm3(GB/T
2999-2002), compressive resistance is 90-110MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 2.90-
3.00g/cm3(GB/T 2999-2002), compressive resistance are 152-160MPa (GB/T 5072-2008), permanent line variation is
1.1% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
21 times (YB/T 376.3-2004).
Embodiment 9
A kind of ultra micro kyanite refractory casting material, the raw material and content of the ultra micro kyanite refractory casting material are:
30% granularity is the alumine aggregate of 3~5mm；18% granularity is the alumine aggregate of 1~3mm；4% granularity is
The alumine aggregate of 0~1mm；6% ultra micro kyanite (9 μm), 9% α-Al2O3；7% sub-white corundum powder；18%
Aluminous cement；6% barium sulfate；2% sodium tetrapolyphosphate.
By micron-sized fine powder in ultra micro kyanite and α-Al2O3 and sub-white corundum powder ingredient, the first mixing of investment taper
In the mixing machines such as machine or tilting high-speed mixer, under conditions of mixed at high speed, keep micron order fine powder that ultra micro kyanite is high
It spends evenly dispersed, obtains evenly dispersed premixed powder.Later period and other raw materials (including aggregate, fine powder, additive etc.) are common
It is remixed in investment planetary stirring machine.After mixing by each component according to the above ratio, above-mentioned mixture 5% is added
Water stirs evenly, and the material being stirred is placed in casting, vibration shaping (40mm*40mm*160mm) in mold, is placed 24 hours
After demould, then through 72 hours maintenance after, at 110 DEG C 24 hours drying and 1500 DEG C heat preservation 3 hours firing after, then according to phase
It closes national standard to be tested, gained results of property are as follows: the bulk density of 110 DEG C of * for 24 hours is 3.20-3.27g/cm3(GB/T
2999-2002), compressive resistance is 100-123MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 3.10-
3.24g/cm3(GB/T 2999-2002), compressive resistance are 150-160MPa (GB/T 5072-2008), permanent line variation is
0.8% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
22 times (YB/T 376.3-2004).
Comparative example 1
Using the formula of the ultra micro kyanite refractory casting material of embodiment 1, before casting will, by all raw materials together into
Row mixed at high speed, the water that mixture 5% is then added stir evenly.Other are the same as embodiment 1.
Final properties of product test obtained is as follows: the bulk density of 110 DEG C of * for 24 hours is 3.05-3.15g/cm3(GB/T
2999-2002), compressive resistance is 70-85MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 2.90-
3.10g/cm3(GB/T 2999-2002), compressive resistance are 85-95MPa (GB/T 5072-2008), permanent line variation is
3.1% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, there is erosion or phenomenon of osmosis；The number of thermal shock resistance
5 times (YB/T 376.3-2004).
Comparative example 2
Kyanite in embodiment 2 is replaced with into the kyanite that partial size is 13 μm, other are the same as embodiment 2.
Final properties of product test obtained is as follows: the bulk density of 110 DEG C of * for 24 hours is 3.05-3.15g/cm3(GB/T
2999-2002), compressive resistance is 70-80MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 2.90-
3.05g/cm3(GB/T 2999-2002), compressive resistance are 80-95MPa (GB/T 5072-2008), permanent line variation is
2.9% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
6 times (YB/T 376.3-2004).
Comparative example 3
Kyanite in embodiment 1 is replaced with into the kyanite that partial size is 3 μm, other are the same as embodiment 1.
Final properties of product test obtained is as follows: the bulk density of 110 DEG C of * for 24 hours is 2.80-2.85g/cm3(GB/T
2999-2002), compressive resistance is 50-70MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 2.73-
2.84g/cm3(GB/T 2999-2002), compressive resistance are 60-75MPa (GB/T 5072-2008), permanent line variation is
1.9% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, non-corrosive or phenomenon of osmosis；The number of thermal shock resistance
9 times (YB/T 376.3-2004).
Comparative example 4
Alumine aggregate proportion adjustment in embodiment 2 is as follows: granularity is that the alumine aggregate of 3~5mm accounts for high alumina
45% (being 40% or so in embodiment 2) of alumina aggregate and alumina powder quality sum, granularity is the high alumina alum of 1~3mm
Native aggregate accounts for 15% (being 10% or so in embodiment 2) of blast furnace alumina aggregate and alumina powder quality sum, and granularity is 0~
It (is 30% left side in embodiment 1 that the alumine aggregate of 1mm, which accounts for blast furnace alumina aggregate and the 30% of alumina powder quality sum,
It is right).Other conditions are the same as embodiment 2.
Final properties of product test obtained is as follows: the bulk density of 110 DEG C of * for 24 hours is 3.05-3.15g/cm3(GB/T
2999-2002), compressive resistance is 65-80MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 2.92-
3.05g/cm3(GB/T 2999-2002), compressive resistance are 75-80MPa (GB/T 5072-2008), permanent line variation is
2.4% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, there is gentle erosion or phenomenon of osmosis；Thermal shock resistance
Number 7 times (YB/T 376.3-2004).
Comparative example 5
It is alumina powder composition adjustment in embodiment 5 is as follows: Al2O3Mass percentage >=99%, granularity≤320 mesh
α-Al2O3Account for 15% (being 10% or so in embodiment 5) of alumine aggregate and alumina powder quality sum；Al2O3Matter
Percentage composition >=98% is measured, granularity≤320 mesh sub-white corundum powder accounts for alumine aggregate and alumina powder quality sum
1% (being 3% or so in embodiment 5)；Al2O3The aluminous cement of mass percentage >=50% accounts for alumine aggregate and oxygen
Change 3% (being 5% or so in embodiment 5) of aluminium powder material quality sum；BaSO4Mass percentage >=95%, granularity≤200 mesh
Barium sulfate account for 1% (being 2% or so in embodiment 5) of alumine aggregate and alumina powder quality sum.
Final properties of product test obtained is as follows: the bulk density of 110 DEG C of * for 24 hours is 3.05-3.10g/cm3(GB/T
2999-2002), compressive resistance is 50-60MPa (GB/T 5072-2008)；The bulk density of 1500 DEG C of * 3h is 3.02-
3.06g/cm3(GB/T 2999-2002), compressive resistance are 65-75MP a (GB/T 5072-2008), permanent line variation is
3.3% (GB/T 5988-2007)；815 DEG C of * 72h aluminium alloy erosion tests, there is erosion or phenomenon of osmosis；The number of thermal shock resistance
5 times (YB/T 376.3-2004).
It should be appreciated that described above, the specific embodiments are only for explaining the present invention, is not intended to limit the present invention.By
The obvious changes or variations that spirit of the invention is extended out are still in the protection scope of this invention.
Claims (1)
1. a kind of ultra micro kyanite refractory casting material, which is characterized in that the ultra micro kyanite refractory casting material is by following heavy
Measure the raw material composition of percentage: 30% granularity is the alumine aggregate of 3~5mm；12% granularity is the high alumina of 1~3mm
Alumina aggregate；21% granularity is the alumine aggregate of 0~1mm；The ultra micro kyanite that 5% granularity is 5 μm, aluminium oxide
Content >=50%, kyanite phase >=70%；8% α-Al2O3；7% sub-white corundum powder；12% aluminous cement；4.95%
Barium sulfate；0.05% calgon, alumina weight percentage composition >=75% in the alumine aggregate；α-Al2O3
Middle Al2O3Mass percentage >=99%, granularity≤320 mesh；Al in sub-white corundum powder2O3Mass percentage >=98%, granularity
≤ 320 mesh；Al in aluminous cement2O3Mass percentage >=50%；BaSO in barium sulfate4Mass percentage >=95%, grain
Spend≤200 mesh；Ultra micro kyanite refractory casting material the preparation method comprises the following steps: by ultra micro kyanite, α-Al2O3, sub-white corundum powder throw
Enter in cone-type mixer or tilting high-speed mixer, under conditions of mixed at high speed, obtains evenly dispersed premixed powder, then
It puts into planetary stirring machine and is remixed jointly with other raw materials, after mixing, the 5% of above-mentioned mixture weight is added
Water, stir evenly, the material being stirred be placed in mold casting, vibration shaping, after placing 24 hours, demoulding, then through 72
After hour maintenance, dries within 24 hours at 110 DEG C, after 1500 DEG C keep the temperature 3 hours, obtain ultra micro kyanite refractory casting material.
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| CN101113099A (en) * | 2007-07-05 | 2008-01-30 | 武汉科技大学 | High-alumina electric furnace cover pouring material and preparation method thereof |
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| CN1210098A (en) * | 1998-08-25 | 1999-03-10 | 李博文 | Self-strengthening refractory casting material and production thereof |
| CN101113099A (en) * | 2007-07-05 | 2008-01-30 | 武汉科技大学 | High-alumina electric furnace cover pouring material and preparation method thereof |
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