CN107500747A - A kind of fine and close calcium hexaluminate castable and preparation method thereof - Google Patents
A kind of fine and close calcium hexaluminate castable and preparation method thereof Download PDFInfo
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- CN107500747A CN107500747A CN201710835430.9A CN201710835430A CN107500747A CN 107500747 A CN107500747 A CN 107500747A CN 201710835430 A CN201710835430 A CN 201710835430A CN 107500747 A CN107500747 A CN 107500747A
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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
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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
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- 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
- C04B2235/3217—Aluminum oxide or oxide forming salts thereof, e.g. bauxite, alpha-alumina
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
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Abstract
The present invention relates to a kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：Particle diameter is 3~5mm calcium hexaluminate raw material 15~45%, particle diameter is 1~3mm calcium hexaluminate raw material 10~30%, particle diameter is 0.088~1mm calcium hexaluminate raw material 0~20%, particle diameter is 0.088~1mm corundum raw material 0~20%, particle diameter is less than 88 μm of calcium hexaluminate raw material 0~30%, particle diameter is less than 88 μm of alundum powder 0~30%, α Al2O3Micro mist 0~10%, fine aluminium acid salt cement 5~15%, spinelle 0~20%.A kind of fine and close calcium hexaluminate castable chemical purity of the present invention is high, and the mineral facies for reacting generation at high temperature are high-melting-point phase, have higher intensity and refractoriness, good anti-erosion, antistrip performance, and have catharsis to molten steel.
Description
Technical field
The present invention relates to a kind of refractory material and preparation method thereof, and in particular to a kind of fine and close calcium hexaluminate castable
Preparation method.
Background technology
Tundish and ladle are the important Thermal Equipments of metallurgical process, mainly play access, transport, refining and pour steel
Effect.As the requirement of every profession and trade and every field to the performance and quality of steel also greatly improves, to tundish and ladle
The requirement of inner lining refractory also gradually steps up, and progressively assigns refractory material with functionalization.
Last one container of the tundish as molten steel continuous casting, the influence to molten steel is very big, and causes to be mingled with steel
Critically important aspect.The work lining material directly contacted with molten steel, all it is MgO matter in recent decades as middle tundish vessel
The content of material, wherein MgO is typically 80%~95%.For the work lining material of tundish, mainly magnesia (MgO) is adiabatic
Plate, magnesian gunning refractory, magnesia coating and magnesium dry-type stock etc..
For the magnesian of application of nearest decades, the problem of it exists in use mainly have it is following some：
(1), due to wherein containing SiO2、Fe2O3Deng, cause occur SiO2+[Al]→[Si]+Al2O3And Fe2O3+[Al]→
[Fe]+Al2O3Deng reaction, thus cause to be formed in steel to be mingled with, influence steel quality.
(2), the intensity of magnesian at high temperature is very low, and service life is very low, and the lining material that causes largely to work enters
Enter into slag or in steel, formation is mingled with, while also results in substantial amounts of waste.
(3), component in magnesian, which enters, easilys lead to spinel inclusion and magnesia in steel and is mingled with to be formed, simultaneously
Also hydrogenation in steel is caused.
These problems are problems existing for packaging material among current, and liner in dundish is very scabrous at present asks
Topic.
How to realize that the long service life of middle packaging material, reduction enter refractory material and entered in molten steel or slag, and how to make
For the liner in dundish material gone out to molten steel is polluted less and purified to molten steel, this has very important to lifting steel quality
Property, and the future thrust of refractory material.
Another critical container as influence molten steel quality is exactly ladle.Ladle is not only to accept molten steel, transhipment
Container, it is more to carry molten steel composition adjustment, the function of refining, therefore, ladle is also to realize that molten steel quality, reduction are mingled with
Critically important smelting procedure.
At present, the requirement to ladle liner is very high, and not only refining temperature is high, processing time length, is also often accompanied with true
Vacancy is managed, and Argon stirring, line feeding are dusted and the technical process such as electric arc heated, and this requires ladle lining fireproof material can not only
Slag-resistant corrodes, and anti-molten steel and slag wash away, long lifespan, and require energy-conserving and environment-protective, cleaning molten steel.
Material currently used for ladle working lining is mainly aluminium-magnesia carbon brick, magnesia carbon brick, corundum-spinel castable, corundum
Alumina-magnesia castable of system etc..Wherein magnalium carbon turns, magnesia carbon brick is not only mingled with toward carburetting, formation in molten steel, while also causes steel
Hydro-thermal amount scatter and disappear etc..And corundum-spinel castable, the alumina-magnesia castable etc. of corundum system, although will not the carburetting into molten steel,
It is that can but be formed to be mingled with into steel.Although variety of problems be present in current work lining material, but without preferably resistance to
Fiery material adapts to the working environment, can substitute these materials, and this is also the maximum barrier of current liquid steel refining and lifting steel quality
Hinder.
Calcium hexaluminate ((CaAl12O19, it is abbreviated as CA6) it is CaO-Al2O3Al in system2O3Content highest aluminic acid calcium phase, its
Solid density is 3.79g/cm3, for fusing point higher than 1875 DEG C, thermal coefficient of expansion is 8.0 × 10-6℃-1；In reducing atmosphere (CO)
Stability is high；Chemical stability in alkaline environment is good；To the wetability of molten metal and slag (steel and non-ferrous metal)
It is low；Its thermal coefficient of expansion and Al2O3It is close, it can be used cooperatively in any proportion with aluminum oxide；Its own, which contains, is not easy aquation
CaO components, have the function that purify molten steel, have very big application potential in ladle and tundish lining.
CA6For with magnetoplumbite type material, there is lamellar structure；Agglutinating property between lamellar structure is very poor, and this is also
Why it is difficult to which preparing bulk density is higher than 2.8g/cm3CA above6Basic reason；Density is higher than 3.0g/cm3CA6
Material is even more extremely difficult.Also therefore, at present on CA6Patent be mostly to utilize the lighter CA of bulk density6, such as：As specially
" a kind of calcium hexaluminate lightweight refractory brick and preparation method thereof (Liu Yangai, Fang Minghao, Yi Shuai, waits a kind of calcium hexaluminate lightweights of to profit
Refractory brick and preparation method thereof, CN 101928135 A [P] .2010.) ", a kind of " light thermal-insulation calcium hexaluminate castable (Li Zhi
By force, Peng Conghua, Liu Feifei, a kind of light thermal-insulation calcium hexaluminate castables of, CN104086192A [P] .2014. are waited) ", it is " a kind of
High-strength calcium hexa-aluminate light heat insulation material and preparation method thereof (Li Yuanbing, Wu Mengfei, Liao Jia, waits a kind of high-strength calcium hexaluminates of light
Matter heat-barrier material and preparation method thereof, CN103496993A [P] .2014.) " etc..
How using bulk density 2.8g/cm is higher than3CA6Castable is prepared, the work for tundish and ladle
Lining, yet there are no report.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of fine and close calcium hexaluminate castable and preparation method thereof, its
Castable chemical purity is high, and the thing for reacting generation at high temperature is mutually high-melting-point phase, has higher intensity and refractoriness, good
Anti-erosion well, antistrip performance, and have catharsis to molten steel.
The technical scheme that the present invention solves above-mentioned technical problem is as follows：A kind of fine and close calcium hexaluminate castable, including with
The raw material of lower percentage by weight：A kind of fine and close calcium hexaluminate castable, it is characterised in that include the original of following percentage by weight
Material：Particle diameter be 3~5mm calcium hexaluminate raw material 15~45%, particle diameter be 1~3mm calcium hexaluminate raw material 10~30%, particle diameter
For 0.088~1mm calcium hexaluminate raw material 0~20%, particle diameter is 0.088~1mm corundum raw material 0~20%, and particle diameter is less than
88 μm of calcium hexaluminate raw material 0~30%, particle diameter are less than 88 μm of alundum powder 0~30%, α-Al2O3Micro mist 0~10%,
Fine aluminium acid salt cement 5~15%, spinelle 0~20%；The outer water reducer for adding above-mentioned raw materials gross weight 0.1~1.5%.
On the basis of above-mentioned technical proposal, the present invention can also do following improvement.
Further, the calcium hexaluminate raw material includes the chemical composition of following percentage by weight：Al2O391.0~93.0%,
CaO 6.5~8.5%, remaining composition≤1.5%；Bulk density >=2.8g/cm of the calcium hexaluminate raw material3, six aluminium
The principal crystalline phase of sour calcium raw material is CaAl12O19, and the principal crystalline phase CaAl of the calcium hexaluminate raw material12O19Content >=80%.
Further, the principal crystalline phase of the calcium hexaluminate castable is CaAl12O19, and the master of the calcium hexaluminate castable
Crystalline phase CaAl12O19Mineral facies be more than 50%.
Further, the principal crystalline phase CaAl of the calcium hexaluminate castable12O19Include the chemical composition of following percentage by weight
For：Al2O391%~93%, CaO 6.5%~8.5%, remaining composition are less than 1.5%；The master of the calcium hexaluminate castable
Crystalline phase CaAl12O19Mineral facies content be more than or equal to 80%.
Further, chemical composition of the calcium hexaluminate castable including following percentage by weight is：Al2O385%~
94.5%, MgO 0%~6%, CaO 5.0%~9.0%, remaining composition are less than or equal to 2%；The calcium hexaluminate castable
Bulk density is more than or equal to 2.8g/cm3。
Further, the bulk density of the calcium hexaluminate castable is 2.8~3.2g/cm3, the porosity be 15%~
20%.Further, the corundum raw material is one or more of combinations in plate diamond spar, white fused alumina and sub-white corundum.
Further, the particle diameter of the spinelle is less than 88 μm, and the spinelle is electric smelting spinelle, sintering spinelle, richness
One or more of combinations in aluminate, magnesium-rich spinel, 70 spinelles and magnesium aluminate spinel.Further, the fine aluminium
Acid salt cement is specially pure calcium aluminate cement.
The beneficial effects of the invention are as follows：A kind of fine and close calcium hexaluminate castable of the present invention is by CA6With slag contacts
When structure change, form the CA of compactness2/ CA structure sheafs suppress continuing to permeate and corroding for slag, while by CA6With melting
The C formed during slag deep reaction12A7Deng catching in steel and be mingled with, purify molten steel quality；A kind of six fine and close aluminic acids of the present invention
Calcium castable chemical purity is high, and the mineral facies for reacting generation at high temperature are high-melting-point phase, have higher intensity and fire resisting
Degree, good anti-erosion, antistrip performance, and have catharsis to molten steel.
Based on a kind of above-mentioned fine and close calcium hexaluminate castable, the present invention also provides a kind of fine and close calcium hexaluminate castable
Preparation method.
A kind of preparation method of fine and close calcium hexaluminate castable, comprises the following steps,
S1, the various raw materials are mixed in proportion, form mixture；
S2, the water of the total weight of the mixture 4~10% is added into the mixture, and is stirred, and forms purees；
S3, by the purees vibration moulding, form idiosome；
S4, it is stripped after the idiosome is conserved into 20~26 hours at room temperature, and 12~26 is dried at 100~140 DEG C
Hour, produce.
The beneficial effects of the invention are as follows：It is made according in a kind of preparation method of fine and close calcium hexaluminate castable of the present invention
Calcium hexaluminate castable, chemical purity is high, and the mineral facies for reacting generation at high temperature are high-melting-point phase, has higher strong
Degree and refractoriness, good anti-erosion, antistrip performance, and have catharsis to molten steel.
Embodiment
Illustrate below and the principle and feature of the present invention are described, the given examples are served only to explain the present invention, not uses
In restriction the scope of the present invention.
Embodiment 1
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 15%,
Particle diameter is 1~3mm calcium hexaluminate raw material 30%,
Particle diameter is 0.088~1mm calcium hexaluminate raw material 10%,
Particle diameter is 0.088~1mm corundum raw material 10%,
Particle diameter is less than 88 μm of calcium hexaluminate raw material 15%,
Particle diameter is less than 88 μm of alundum powder 15%,
Fine aluminium acid salt cement 5%,
The outer water reducer for adding above-mentioned raw materials gross weight 0.1%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 8%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 2
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 30%,
Particle diameter is 1~3mm calcium hexaluminate raw material 10%,
Particle diameter is less than 88 μm of calcium hexaluminate raw material 30%,
α-Al2O3Micro mist 10%,
Fine aluminium acid salt cement 10%,
Spinelle 10%；
The outer water reducer for adding above-mentioned raw materials gross weight 0.45%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 6%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 3
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 45%,
Particle diameter is 1~3mm calcium hexaluminate raw material 20%,
Particle diameter is less than 88 μm of alundum powder 15%,
α-Al2O3Micro mist 5%,
Fine aluminium acid salt cement 15%,
The outer water reducer for adding above-mentioned raw materials gross weight 0.8%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 7%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 4
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 30%,
Particle diameter is 1~3mm calcium hexaluminate raw material 30%,
Particle diameter is less than 88 μm of alundum powder 30%,
Fine aluminium acid salt cement 10%,
The outer water reducer for adding above-mentioned raw materials gross weight 1.15%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 4%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 5
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 45%,
Particle diameter is 1~3mm calcium hexaluminate raw material 10%,
Particle diameter is 0.088~1mm calcium hexaluminate raw material 20%,
Fine aluminium acid salt cement 5%,
Spinelle 20%；
The outer water reducer for adding above-mentioned raw materials gross weight 1.5%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 9%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 6
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 45%,
Particle diameter is 1~3mm calcium hexaluminate raw material 10%,
Particle diameter is 0.088~1mm calcium hexaluminate raw material 20%,
Particle diameter is 0.088~1mm corundum raw material 20%,
Fine aluminium acid salt cement 5%,
The outer water reducer for adding above-mentioned raw materials gross weight 0.1%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 6%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 7
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 15%,
Particle diameter is 1~3mm calcium hexaluminate raw material 20%,
Particle diameter is 0.088~1mm calcium hexaluminate raw material 10%,
Particle diameter is 0.088~1mm corundum raw material 5%,
Particle diameter is less than 88 μm of calcium hexaluminate raw material 15%,
Particle diameter is less than 88 μm of alundum powder 15%,
α-Al2O3Micro mist 5%,
Fine aluminium acid salt cement 5%,
Spinelle 10%；
The outer water reducer for adding above-mentioned raw materials gross weight 1.3%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 8%, stirs, vibration moulding, time of vibration 30 seconds；It is small that base substrate after shaping conserves 24 at room temperature
When after be stripped, be prepared within 24 hours through being dried at 110 DEG C.
Embodiment 8
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 40%；
Particle diameter is 1~3mm calcium hexaluminate raw material 15%；
Particle diameter is 0.088~1mm calcium hexaluminate raw material 15%；
Particle diameter is less than 88 μm of calcium hexaluminate raw material 18%；
α-Al2O3Micro mist 6%；
Pure calcium aluminate cement 6%；
The outer water reducer for adding above-mentioned raw materials gross weight 0.1%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 6%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 9
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 40%；
Particle diameter is 1~3mm calcium hexaluminate raw material 15%；
Particle diameter is 0.088~1mm calcium hexaluminate raw material 15%；
Particle diameter is less than 88 μm of calcium hexaluminate raw material 18%；
α-Al2O3Micro mist 7%；
Pure calcium aluminate cement 5%；
The outer water reducer for adding above-mentioned raw materials gross weight 0.1%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 6%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 10
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 40%；
Particle diameter is 1~3mm calcium hexaluminate raw material 15%；
Particle diameter is 0.088~1mm calcium hexaluminate raw material 15%；
Particle diameter is less than 88 μm of plate diamond spar 18%；
α-Al2O3Micro mist 6%；
Pure calcium aluminate cement 6%；
The outer water reducer for adding above-mentioned raw materials gross weight 0.1%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 6%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 11
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 40%；
Particle diameter is 1~3mm calcium hexaluminate raw material 15%；
Particle diameter is 0.088~1mm calcium hexaluminate raw material 15%；
Particle diameter is less than 88 μm of white fused alumina 18%；
α-Al2O3Micro mist 6%；
Pure calcium aluminate cement 6%；
The outer water reducer for adding above-mentioned raw materials gross weight 0.1%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 6%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 12
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 40%；
Particle diameter is 1~3mm calcium hexaluminate raw material 15%；
Particle diameter is 0.088~1mm calcium hexaluminate raw material 15%；
Particle diameter is less than 88 μm of calcium hexaluminate raw material 9%；
Particle diameter is less than 88 μm of plate diamond spar 9%；
α-Al2O3Micro mist 6%；
Pure calcium aluminate cement 6%,
The outer water reducer for adding above-mentioned raw materials gross weight 0.1%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 6%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Embodiment 13
A kind of fine and close calcium hexaluminate castable, include the raw material of following percentage by weight：
Particle diameter is 3~5mm calcium hexaluminate raw material 40%；
Particle diameter is 1~3mm calcium hexaluminate raw material 15%；
Particle diameter is 0.088~1mm calcium hexaluminate raw material 15%；
Particle diameter is less than 88 μm of calcium hexaluminate raw material 9%；
Particle diameter is less than 88 μm of white fused alumina 9%；
α-Al2O3Micro mist 6%；
Pure calcium aluminate cement 6%；
The outer water reducer for adding above-mentioned raw materials gross weight 0.1%.
Above-mentioned various raw materials are mixed in proportion, stir to form mixture；Added into the mixture described mixed
The water of compound gross weight 6%, stirs, vibration moulding, and time of vibration is 30 seconds；Base substrate after shaping conserves 24 at room temperature
It is stripped after hour, is prepared through being dried 24 hours at 110 DEG C.
Wherein, the low heat conduction ladle working lining calcium hexaluminate castable prepared in embodiment 8~13 it is every physical
1 can be shown in Table.
Table 1
In other examples：
The percentage by weight of the calcium hexaluminate raw material that particle diameter is 3~5mm in the feed can be between 15% to 45%
Arbitrary value, such as can be 15% or 20% or 25% or 30% or 35% or 40%；
The percentage by weight of the calcium hexaluminate raw material that particle diameter is 1~3mm in the feed can be between 10% to 30%
Arbitrary value, such as can be 10% or 15% or 20% or 25% or 30%；
The percentage by weight of the calcium hexaluminate raw material that particle diameter is 0.088~1mm in the feed can be between 0% to 20%
Arbitrary value, such as can be 0% or 5% or 10% or 15% or 20%；
The percentage by weight of the corundum raw material that particle diameter is 0.088~1mm in the feed can be times between 0% to 20%
Meaning value, such as can be 0% or 5% or 10% or 15% or 20%；
The percentage by weight of calcium hexaluminate raw material of the particle diameter less than 88 μm in the feed can be times between 0% to 30%
Meaning value, such as can be 0% or 5% or 10% or 15% or 20% or 25% or 30%；
Alundum powder percentage by weight in the feed of the particle diameter less than 88 μm can be any between 0% to 30%
Value, such as can be 0% or 5% or 10% or 15% or 20% or 25% or 30%；
α-Al2O3The percentage by weight of micro mist in the feed can be the arbitrary value between 0% to 10%, such as can be
0% or 5% or 10%；
The percentage by weight of fine aluminium acid salt cement in the feed can be the arbitrary value between 5% to 15%, such as can be with
For 5% or 10% or 15%；
The percentage by weight of spinelle in the feed can be 0% to 20% between arbitrary value, such as can be 0% or
5% or 10% or 15% or 20%.
The foregoing is only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (10)
1. a kind of fine and close calcium hexaluminate castable, it is characterised in that include the raw material of following percentage by weight：Particle diameter be 3~
5mm calcium hexaluminate raw material 15~45%, particle diameter are 1~3mm calcium hexaluminate raw material 10~30%, and particle diameter is 0.088~1mm
Calcium hexaluminate raw material 0~20%, particle diameter is 0.088~1mm corundum raw material 0~20%, and particle diameter is less than 88 μm of six aluminic acids
Calcium raw material 0~30%, particle diameter are less than 88 μm of alundum powder 0~30%, α-Al2O3Micro mist 0~10%, fine aluminium acid salt cement 5
~15%, spinelle 0~20%；The outer water reducer for adding above-mentioned raw materials gross weight 0.1~1.5%.
A kind of 2. fine and close calcium hexaluminate castable according to claim 1, it is characterised in that the calcium hexaluminate raw material
Include the chemical composition of following percentage by weight：Al2O391.0~93.0%, CaO 6.5~8.5%, remaining composition≤
1.5%；Bulk density >=2.8g/cm of the calcium hexaluminate raw material3, the principal crystalline phase of the calcium hexaluminate raw material is CaAl12O19,
And the principal crystalline phase CaAl of the calcium hexaluminate raw material12O19Content >=80%.
A kind of 3. fine and close calcium hexaluminate castable according to claim 1 or 2, it is characterised in that the calcium hexaluminate
The principal crystalline phase of castable is CaAl12O19, and the principal crystalline phase CaAl of the calcium hexaluminate castable12O19Mineral facies be more than 50%.
A kind of 4. fine and close calcium hexaluminate castable according to claim 3, it is characterised in that the calcium hexaluminate cast
The principal crystalline phase CaAl of material12O19Chemical composition including following percentage by weight is：Al2O391%~93%, CaO 6.5%~
8.5%, remaining composition is less than 1.5%；The principal crystalline phase CaAl of the calcium hexaluminate castable12O19Mineral facies content be more than etc.
In 80%.
A kind of 5. fine and close calcium hexaluminate castable according to claim 4, it is characterised in that the calcium hexaluminate cast
Material includes the chemical composition of following percentage by weight：Al2O385%~94.5%, MgO 0%~6%, CaO 5.0%~
9.0%, remaining composition is less than or equal to 2%；The bulk density of the calcium hexaluminate castable is more than or equal to 2.8g/cm3。
A kind of 6. fine and close calcium hexaluminate castable according to claim 5, it is characterised in that the calcium hexaluminate cast
The bulk density of material is 2.8~3.2g/cm3, the porosity is 15%~20%.
A kind of 7. fine and close calcium hexaluminate castable according to claim 1 or 2, it is characterised in that the corundum raw material
For one or more of combinations in plate diamond spar, white fused alumina and sub-white corundum.
8. a kind of fine and close calcium hexaluminate castable according to claim 1 or 2, it is characterised in that the spinelle
Particle diameter is less than 88 μm, and the spinelle is electric smelting spinelle, sintering spinelle, aluminium riched spinel, magnesium-rich spinel, 70 spinelles
With one or more of combinations in magnesium aluminate spinel.
A kind of 9. fine and close calcium hexaluminate castable according to claim 1 or 2, it is characterised in that the fine aluminium hydrochlorate
Cement is specially pure calcium aluminate cement.
10. a kind of preparation method of fine and close calcium hexaluminate castable as described in any one of claim 1 to 9, its feature exist
In, comprise the following steps,
S1, the various raw materials are mixed in proportion, form mixture；
S2, the water of the total weight of the mixture 4~10% is added into the mixture, and is stirred, and forms purees；
S3, by the purees vibration moulding, form idiosome；
S4, it is stripped after the idiosome is conserved into 20~26 hours at room temperature, and is dried 12~26 hours at 100~140 DEG C,
Produce.
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| CN107827469A (en) * | 2017-10-19 | 2018-03-23 | 淄博市鲁中耐火材料有限公司 | Low heat conduction high abrasion corundum pouring material and preparation method thereof |
| CN108947547A (en) * | 2018-07-20 | 2018-12-07 | 浙江自立高温科技有限公司 | A kind of high temperature resistant ladle safety liner castable |
| CN109400145A (en) * | 2018-11-13 | 2019-03-01 | 中铸新材工业（江苏）有限公司 | A kind of manufacturing method of energy-saving aluminium water flow grooves prefabricated component |
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| CN109776101A (en) * | 2019-03-14 | 2019-05-21 | 武汉科技大学 | A kind of CA6-MA-Cr2O3-Al2O3Ladle liner castable and preparation method thereof |
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| CN110903096A (en) * | 2019-12-04 | 2020-03-24 | 武汉科技大学 | Calcium hexaluminate castable for plasma gasification furnace and preparation method thereof |
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| WO2022237717A1 (en) | 2021-05-10 | 2022-11-17 | 淄博市鲁中耐火材料有限公司 | High-purity compact calcium hexa-aluminate-based refractory material and preparation method therefor |
| CN116874290A (en) * | 2023-08-09 | 2023-10-13 | 中钢集团洛阳耐火材料研究院有限公司 | Chromium corundum castable containing calcium hexaluminate for dangerous waste incineration device |
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| CN110526721A (en) * | 2018-05-25 | 2019-12-03 | 宝山钢铁股份有限公司 | A kind of effective refractory material of steel-making RH refining furnace dipping |
| CN108947547A (en) * | 2018-07-20 | 2018-12-07 | 浙江自立高温科技有限公司 | A kind of high temperature resistant ladle safety liner castable |
| CN109400145A (en) * | 2018-11-13 | 2019-03-01 | 中铸新材工业（江苏）有限公司 | A kind of manufacturing method of energy-saving aluminium water flow grooves prefabricated component |
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| CN109776101B (en) * | 2019-03-14 | 2021-05-18 | 武汉科技大学 | CA (certificate Authority)6-MA-Cr2O3-Al2O3Ladle lining castable and preparation method thereof |
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| CN111792927A (en) * | 2019-04-09 | 2020-10-20 | 宝山钢铁股份有限公司 | Low-heat-conduction refractory brick for ladle working lining and preparation method thereof |
| CN110903096A (en) * | 2019-12-04 | 2020-03-24 | 武汉科技大学 | Calcium hexaluminate castable for plasma gasification furnace and preparation method thereof |
| CN110903096B (en) * | 2019-12-04 | 2022-03-11 | 武汉科技大学 | Calcium hexaluminate castable for plasma gasification furnace and preparation method thereof |
| WO2022237769A1 (en) | 2021-05-10 | 2022-11-17 | 北京科技大学 | Refractory material with function of cleaning molten steel, preparation method therefor and use thereof |
| WO2022237776A1 (en) | 2021-05-10 | 2022-11-17 | 淄博郎丰高温材料有限公司 | Ca6-based refractory material with medium volume density, preparation method therefor, and use thereof |
| WO2022237727A1 (en) | 2021-05-10 | 2022-11-17 | 淄博市鲁中耐火材料有限公司 | Corrosion-resistant refractory material, preparation method therefor, and use thereof |
| WO2022237717A1 (en) | 2021-05-10 | 2022-11-17 | 淄博市鲁中耐火材料有限公司 | High-purity compact calcium hexa-aluminate-based refractory material and preparation method therefor |
| CN116874290A (en) * | 2023-08-09 | 2023-10-13 | 中钢集团洛阳耐火材料研究院有限公司 | Chromium corundum castable containing calcium hexaluminate for dangerous waste incineration device |
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Application publication date: 20171222 |