CN105645936B - A kind of high alumina bubble lightweight castable and preparation method thereof - Google Patents
A kind of high alumina bubble lightweight castable and preparation method thereof Download PDFInfo
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- CN105645936B CN105645936B CN201610014442.0A CN201610014442A CN105645936B CN 105645936 B CN105645936 B CN 105645936B CN 201610014442 A CN201610014442 A CN 201610014442A CN 105645936 B CN105645936 B CN 105645936B
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- high alumina
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- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title claims abstract description 108
- 238000002360 preparation method Methods 0.000 title claims abstract description 21
- 239000000843 powder Substances 0.000 claims abstract description 31
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 27
- 239000002994 raw material Substances 0.000 claims abstract description 25
- 239000004927 clay Substances 0.000 claims abstract description 23
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 17
- 239000004568 cement Substances 0.000 claims abstract description 11
- 235000019832 sodium triphosphate Nutrition 0.000 claims abstract description 8
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 8
- GCLGEJMYGQKIIW-UHFFFAOYSA-H sodium hexametaphosphate Chemical compound [Na]OP1(=O)OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])OP(=O)(O[Na])O1 GCLGEJMYGQKIIW-UHFFFAOYSA-H 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims description 16
- 239000002245 particle Substances 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 12
- 229910052593 corundum Inorganic materials 0.000 claims description 10
- 239000011734 sodium Substances 0.000 claims description 10
- 229910001845 yogo sapphire Inorganic materials 0.000 claims description 10
- 229910052681 coesite Inorganic materials 0.000 claims description 7
- 229910052906 cristobalite Inorganic materials 0.000 claims description 7
- 229910052682 stishovite Inorganic materials 0.000 claims description 7
- 229910052905 tridymite Inorganic materials 0.000 claims description 7
- 239000000126 substance Substances 0.000 claims description 6
- 239000003595 mist Substances 0.000 claims description 4
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 claims description 3
- KEAYESYHFKHZAL-UHFFFAOYSA-N Sodium Chemical compound [Na] KEAYESYHFKHZAL-UHFFFAOYSA-N 0.000 claims 2
- UEZVMMHDMIWARA-UHFFFAOYSA-N Metaphosphoric acid Chemical compound OP(=O)=O UEZVMMHDMIWARA-UHFFFAOYSA-N 0.000 claims 1
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 claims 1
- UNXRWKVEANCORM-UHFFFAOYSA-I triphosphate(5-) Chemical compound [O-]P([O-])(=O)OP([O-])(=O)OP([O-])([O-])=O UNXRWKVEANCORM-UHFFFAOYSA-I 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 11
- 238000009413 insulation Methods 0.000 abstract description 10
- 238000003303 reheating Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 abstract description 6
- 238000004321 preservation Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 238000010438 heat treatment Methods 0.000 description 7
- 229910052782 aluminium Inorganic materials 0.000 description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 6
- 239000004411 aluminium Substances 0.000 description 6
- 239000011449 brick Substances 0.000 description 6
- 238000001514 detection method Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 5
- 238000005266 casting Methods 0.000 description 4
- 229910052594 sapphire Inorganic materials 0.000 description 3
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000005054 agglomeration Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000009749 continuous casting Methods 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 2
- 238000007670 refining Methods 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- 229910001051 Magnalium Inorganic materials 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 239000007767 bonding agent Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000009847 ladle furnace Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
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- 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
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The present invention relates to a kind of high alumina bubble lightweight castables and preparation method thereof.Its technical solution is：Using the Guangxi clay of the high alumina hollow ball of 28 ~ 48wt%, the flint clay of 14 ~ 30wt%, the alumina fine powder of 6 ~ 30wt%, the alumina powder of 6 ~ 10wt%, the fine silica powder of 1 ~ 5wt%, the aluminous cement of 2 ~ 10wt% and 1 ~ 5wt% as raw material, the calgon of the sodium tripolyphosphate and 0.1 ~ 0.5wt% of the additional 0.04 ~ 0.2wt% of raw material, dry-mixed 1 ~ 3min, the water of 7 ~ 15wt% of the additional raw material again, 2 ~ 5min is mixed to get high alumina bubble lightweight castable.The present invention have the characteristics that simple for process, production cost it is low and to equipment without particular/special requirement；Prepared high alumina bubble lightweight castable bulk density is low, thermal conductivity is low, compressive resistance is high, reheating linear change rate on reheating is low, volume stability is good and heat insulation and preservation effect is good, is suitable for permanent ladle layer.
Description
Technical field
The invention belongs to lightening casting material technical fields.More particularly to a kind of high alumina bubble lightweight castable and its preparation
Method.
Background technology
It is human kind sustainable development, exploitation lightweight, height in today that traditional energy increasingly depleted and new energy develop slowly
By force, the inner lining material that good thermal shock stability, temperature in use are high, can meet needed for lightweight construction superhigh temperature kiln is current most urgent
Task.Ladle is the important Thermal Equipment of steel mill, and with the continuous development of steel-smelting technology, smelting temperature improves and continuous casting ratio
Increase, molten steel extended residence time in ladle, especially external refining LF, RH techniques require ladle liner more and more severe
It carves, ladle liner material safeguards construction technology also and needs to continuously improve, and makes great efforts to reduce refractory consumption rate and cost, improves ladle
Warm status, it is Main Trends of The Development of the ladle with resistance to material to meet refining and continuous casting process requirement.
Large ladle furnace permanent layer generally uses high alumina castable, high-alumina brick or cured due to considering from ladle security standpoint
Stone brick.Using agalmatolite brick and high-alumina brick, brickwork joint is more, and safety is difficult to ensure；High alumina castable heat-insulating property is poor, permanent layer
Heat insulation effect do not give full play to, and safety is poor so that working lining materials dare not be after when using certain residual thick
It is continuous to use（Domestic magnalium preformed bricks are offline residual thick generally in 60 ~ 80mm, and the residual thick control of Japan is in 40mm or so）, working lining
Material cannot be fully using being that ladle is caused to consume the high major reason of resistance to material.Therefore in order to ensure safety, it is necessary to exploitation tool
There is the novel pouring material of high intensity, low heat conduction to substitute high alumina castable.
Currently, many novel heat-barrier materials have been studied and applied to the permanent layers or work of various high temperature kilns
Make in layer, although having excellent heat-proof quality, its intensity past using the castable that these novel heat insulation materials are prepared
Toward standard is not achieved, the application range of this material is limited.Zhang Guodong et al. uses alumina hollow ball and α-Al2O3Micro mist
It is prepared for low cement combined aluminum oxide bubble lightweight castable for raw material, refractoriness under load is up to 1600 DEG C, flexural strength
Also 8.0MPa is reached, but its thermal conductivity and intensity are still to be improved（The research of low cement combined aluminum oxide bubble lightweight castable
[J] fire resistings and lime .2009,34 (5)）." a kind of preparation method preparing light-high-strength alumina hollow ball ceramics "
（CN1554616A patented technology), with α-Al2O3Micro mist and alumina hollow ball are raw material, using phosphoric acid solution as bonding agent, system
Standby lightweight thermal insulation brick bulk density is relatively low, is 1.2 ~ 1.4g/cm3, flexural strength and compressive resistance are larger, respectively 5 ~
12MPa and 10 ~ 30MPa, but the method is only with alumina hollow ball and α-Al2O3Micro mist is raw material, is difficult to be sintered at high temperature, is needed
Higher temperature is wanted to be burnt into, cost is higher, and its thermal conductivity is higher.A kind of " preparation of hollow alumina ball thermal insulation refractory material
Method "（CN102491761A）Patented technology, though prepared hollow alumina ball thermal insulation refractory material thermal shock resistance is excellent
It is good, bulk density is low low with thermal conductivity, but compressive resistance reduce, only 7 ~ 14MPa.
Invention content
The present invention is directed to overcome prior art defect, it is therefore an objective to it is low and to equipment to provide a kind of simple for process, production cost
The preparation method of high alumina bubble lightweight castable without particular/special requirement；The high alumina bubble lightweight castable prepared with this method
Bulk density is low, thermal conductivity is low, compressive resistance is high, reheating linear change rate on reheating is low, volume stability is good and heat insulation and preservation effect is good, fits
For permanent ladle layer.
To achieve the above object, the technical solution adopted by the present invention is：With high alumina hollow ball, the 14 ~ 30wt% of 28 ~ 48wt%
Flint clay, the alumina fine powder of 6 ~ 30wt%, the alumina powder of 6 ~ 10wt%, the fine silica powder of 1 ~ 5wt%, 2 ~ 10wt%
The Guangxi clay of aluminous cement and 1 ~ 5wt% are raw material, the sodium tripolyphosphate of the additional 0.04 ~ 0.2wt% of raw material and 0.1 ~
The water of the calgon of 0.5wt%, dry-mixed 1 ~ 3min, then 7 ~ 15wt% of the additional raw material, 2 ~ 5min is to get high alumina for mixing
Bubble lightweight castable.
The main chemical compositions of the high alumina hollow ball are：Al2O3For 55 ~ 65wt%, SiO2For 25 ~ 35wt%；High alumina is hollow
The grain composition of ball is：Granularity be less than 8mm and more than or equal to 5mm particle be 10 ~ 20wt%, granularity be less than 5mm and be more than or
Particle equal to 3mm is 30 ~ 50wt%, and it is 30 ~ 60wt% that granularity, which is less than 3mm and the particle more than or equal to 1mm,.
The main chemical compositions of the flint clay are：Al2O3For 40 ~ 50wt%, SiO2For 40 ~ 60wt%, Fe2O3For 1 ~
3wt%；The grain composition of flint clay is：It is 50 ~ 60wt% that granularity, which is less than 1mm and is greater than or equal to the particle of 0.5mm, and granularity is less than
0.5mm and the particle for being greater than or equal to 0.074mm are 40 ~ 50wt%.
The Al of the alumina fine powder2O3Content >=88wt%, granularity≤0.088mm.
The Al of the alumina powder2O3Content >=98wt%, granularity≤3 μm.
The SiO of the fine silica powder2Content >=95wt%, granularity≤3 μm.
The Al of the aluminous cement2O3Content >=71wt%, CaO content≤30wt%, granularity≤3 μm.
The SiO of the Guangxi clay2Content >=40wt%, Al2O3≤ 40wt%, granularity are≤3 μm.
The Na of the sodium tripolyphosphate5P3O10Content >=98wt%, granularity≤1mm.
The Na of the calgon6P6O18Content >=98wt%, granularity≤1mm.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art：
High alumina hollow ball that the present invention uses has hollow structure, and bulk density is low, intensity is higher and after heat treatment
Volume change is small；There is a large amount of mullite to generate in high alumina hollow ball spherical shell by high-temperature process, further improves material
Intensity.The lightening casting material prepared using high alumina hollow ball as aggregate has lower bulk density and higher apparent pore
Rate ensure that high alumina bubble lightweight castable has excellent heat preservation and insulation；Due to matching for aggregate appropriate and fine powder
Than with the agglomeration under high temperature, high alumina bubble lightweight castable also have higher strength at normal temperature and the resistance to pressure of room temperature
Degree, permanent Linear change rate are small.
High alumina bubble lightweight castable prepared by the present invention, 110 DEG C × for 24 hours with 1300 DEG C × 3h under the conditions of heat at
Through detection after reason：Bulk density is 1.82 ~ 2.00g/cm3With 1.81 ~ 1.98g/cm3；Apparent porosity is 33 ~ 37% and 35 ~ 39%；
Strength at normal temperature is 2 ~ 6MPa and 9 ~ 12MPa；Cold crushing strength is 17 ~ 29MPa and 36 ~ 51MPa.Prepared high alumina is empty
Bulbus cordis lightening casting material, under the conditions of 1300 DEG C × 3h be heat-treated after permanent Linear change rate be -0.13 ~ -0.18,1300 DEG C
Thermal coefficient after × 3h heat treatments under the conditions of 500 DEG C is 0.51 ~ 0.60W (mK)-1。
Therefore, the present invention have simple for process, production cost it is low and to equipment without particular/special requirement the characteristics of；Prepared high alumina
Bubble lightweight castable bulk density is low, thermal conductivity is low, compressive resistance is high, reheating linear change rate on reheating is low, volume stability is good and
Heat insulation and preservation effect is good, is suitable for permanent ladle layer.
Specific implementation mode
The invention will be further described With reference to embodiment, not to the limitation of its protection domain.
It is first that raw material Unify legislation involved in present embodiment is as follows to avoid repeating, in embodiment no longer
It repeats：
The main chemical compositions of the high alumina hollow ball are：Al2O3For 55 ~ 65wt%, SiO2For 25 ~ 35wt%；High alumina is hollow
The grain composition of ball is：Granularity be less than 8mm and more than or equal to 5mm particle be 10 ~ 20wt%, granularity be less than 5mm and be more than or
Particle equal to 3mm is 30 ~ 50wt%, and it is 30 ~ 60wt% that granularity, which is less than 3mm and the particle more than or equal to 1mm,.
The main chemical compositions of the flint clay are：Al2O3For 40 ~ 50wt%, SiO2For 40 ~ 60wt%, Fe2O3For 1 ~
3wt%；The grain composition of flint clay is：It is 50 ~ 60wt% that granularity, which is less than 1mm and is greater than or equal to the particle of 0.5mm, and granularity is less than
0.5mm and the particle for being greater than or equal to 0.074mm are 40 ~ 50wt%.
The Al of the alumina fine powder2O3Content >=88wt%, granularity≤0.088mm.
The Al of the alumina powder2O3Content >=98wt%, granularity≤3 μm.
The SiO of the fine silica powder2Content >=95wt%, granularity≤3 μm.
The Al of the aluminous cement2O3Content >=71wt%, CaO content≤30wt%, granularity≤3 μm.
The SiO of the Guangxi clay2Content >=40wt%, Al2O3≤ 40wt%, granularity are≤3 μm.
The Na of the sodium tripolyphosphate5P3O10Content >=98wt%, granularity≤1mm.
The Na of the calgon6P6O18Content >=98wt%, granularity≤1mm.
Embodiment 1
A kind of high alumina bubble lightweight castable and preparation method thereof.With high alumina hollow ball, the 18 ~ 22wt% of 28 ~ 33wt%
Flint clay, the alumina fine powder of 24 ~ 30wt%, the alumina powder of 8 ~ 9wt%, the fine silica powder of 4 ~ 5wt%, 2 ~ 4wt%
The Guangxi clay of aluminous cement and 2 ~ 3wt% are raw material, the sodium tripolyphosphate of the additional 0.04 ~ 0.08wt% of raw material and 0.1 ~
The water of the calgon of 0.2wt%, dry-mixed 1 ~ 3min, then 7 ~ 9wt% of the additional raw material, 2 ~ 5min is to get high alumina for mixing
Bubble lightweight castable.
High alumina bubble lightweight castable prepared by the present embodiment, 110 DEG C × for 24 hours with 1300 DEG C × 3h under the conditions of heat
Through detection after processing：Bulk density is 1.90 ~ 2.00g/cm3With 1.90 ~ 1.98g/cm3；Apparent porosity be 33 ~ 34% and 35 ~
37%；Strength at normal temperature is 3 ~ 5MPa and 10 ~ 12MPa；Cold crushing strength is 17 ~ 19MPa and 48 ~ 51MPa；Prepared
High alumina bubble lightweight castable, the permanent Linear change rate after being heat-treated under the conditions of 1300 DEG C × 3h are -0.14 ~ -0.16；
Thermal coefficient after 1300 DEG C × 3h heat treatments under the conditions of 500 DEG C is 0.55 ~ 0.60W (mK)-1。
Embodiment 2
A kind of high alumina bubble lightweight castable and preparation method thereof.With high alumina hollow ball, the 22 ~ 26wt% of 33 ~ 38wt%
Flint clay, the alumina fine powder of 18 ~ 24wt%, the alumina powder of 9 ~ 10wt%, 1 ~ 2wt% fine silica powder, 8 ~ 10wt%
Aluminous cement and 3 ~ 4wt% Guangxi clay be raw material, the sodium tripolyphosphate of the additional 0.08 ~ 0.12wt% of raw material and
The water of the calgon of 0.2 ~ 0.3wt%, dry-mixed 1 ~ 3min, then 9 ~ 11wt% of the additional raw material, mixing 2 ~ 5min to get
High alumina bubble lightweight castable.
High alumina bubble lightweight castable prepared by the present embodiment, 110 DEG C × for 24 hours with 1300 DEG C × 3h under the conditions of heat
Through detection after processing：Bulk density is 1.90 ~ 1.96g/cm3With 1.89 ~ 1.93g/cm3；Apparent porosity be 33 ~ 34% and 36 ~
38%；Strength at normal temperature is 2 ~ 4MPa and 10 ~ 11MPa；Cold crushing strength is 20 ~ 22MPa and 46 ~ 48MPa；Prepared
High alumina bubble lightweight castable, the permanent Linear change rate after being heat-treated under the conditions of 1300 DEG C × 3h are -0.16 ~ -0.18；
Thermal coefficient after 1300 DEG C × 3h heat treatments under the conditions of 500 DEG C is 0.54 ~ 0.58W (mK)-1。
Embodiment 3
A kind of high alumina bubble lightweight castable and preparation method thereof.With high alumina hollow ball, the 26 ~ 30wt% of 38 ~ 43wt%
Flint clay, the alumina fine powder of 6 ~ 12wt%, the alumina powder of 6 ~ 7wt%, the fine silica powder of 2 ~ 3wt%, 4 ~ 6wt% aluminium
The Guangxi clay of sour calcium cement and 4 ~ 5wt% are raw material, the sodium tripolyphosphate of the additional 0.12 ~ 0.16wt% of raw material and 0.3 ~
The water of the calgon of 0.4wt%, dry-mixed 1 ~ 3min, then 11 ~ 13wt% of the additional raw material, 2 ~ 5min is to get height for mixing
Aluminium bubble lightweight castable.
High alumina bubble lightweight castable prepared by the present embodiment, 110 DEG C × for 24 hours with 1300 DEG C × 3h under the conditions of heat
Through detection after processing：Bulk density is 1.89 ~ 1.94g/cm3With 1.84 ~ 1.90g/cm3；Apparent porosity be 34 ~ 35% and 37 ~
38%；Strength at normal temperature is 5 ~ 6MPa and 9 ~ 10MPa；Cold crushing strength is 27 ~ 29MPa and 41 ~ 43MPa；Prepared height
Aluminium bubble lightweight castable, the permanent Linear change rate after being heat-treated under the conditions of 1300 DEG C × 3h are -0.14 ~ -0.16；1300
DEG C × 3h heat treatments after thermal coefficient under the conditions of 500 DEG C be 0.52 ~ 0.55W (mK)-1。
Embodiment 4
A kind of high alumina bubble lightweight castable and preparation method thereof.With high alumina hollow ball, the 14 ~ 18wt% of 43 ~ 48wt%
The alumina fine powder of 12 ~ 18wt% of flint clay, the alumina powder of 7 ~ 8wt%, the fine silica powder of 3 ~ 4wt%, 6 ~ 8wt% aluminium
The Guangxi clay of sour calcium cement and 1 ~ 2wt% are raw material, the sodium tripolyphosphate of the additional 0.16 ~ 0.20wt% of raw material and 0.4 ~
The water of the calgon of 0.5wt%, dry-mixed 1 ~ 3min, then 13 ~ 15wt% of the additional raw material, 2 ~ 5min is to get height for mixing
Aluminium bubble lightweight castable.
High alumina bubble lightweight castable prepared by the present embodiment, 110 DEG C × for 24 hours with 1300 DEG C × 3h under the conditions of heat
Through detection after processing：Bulk density is 1.82 ~ 1.87g/cm3With 1.81 ~ 1.85g/cm3；Apparent porosity be 35 ~ 37% and 38 ~
39%；Strength at normal temperature is 4 ~ 5MPa and 9 ~ 10MPa；Cold crushing strength is 22 ~ 24MPa and 36 ~ 38MPa；Prepared height
Aluminium bubble lightweight castable, the permanent Linear change rate after being heat-treated under the conditions of 1300 DEG C × 3h are -0.13 ~ -0.15；1300
DEG C × 3h heat treatments after thermal coefficient under the conditions of 500 DEG C be 0.51 ~ 0.53W (mK)-1。
The high alumina hollow ball that present embodiment uses has hollow structure, and bulk density is low, intensity is higher and through heat
Treated, and volume change is small；There is a large amount of mullite to generate in high alumina hollow ball spherical shell by high-temperature process, further carries
The high intensity of material.The lightening casting material prepared using high alumina hollow ball as aggregate has lower bulk density and higher
Apparent porosity, ensure that high alumina bubble lightweight castable have excellent heat preservation and insulation；Due to aggregate appropriate with
The proportioning of fine powder and the agglomeration under high temperature, high alumina bubble lightweight castable also have higher strength at normal temperature and often
Warm compressive resistance, permanent Linear change rate are small.
High alumina bubble lightweight castable prepared by present embodiment, 110 DEG C × for 24 hours with 1300 DEG C × 3h items
Through detection after being heat-treated under part：Bulk density is 1.82 ~ 2.00g/cm3With 1.81 ~ 1.98g/cm3；Apparent porosity is 33 ~ 37% Hes
35~39%；Strength at normal temperature is 2 ~ 6MPa and 9 ~ 12MPa；Cold crushing strength is 17 ~ 29MPa and 36 ~ 51MPa.It is prepared
High alumina bubble lightweight castable, under the conditions of 1300 DEG C × 3h be heat-treated after permanent Linear change rate be -0.13 ~ -0.18,
Thermal coefficient after 1300 DEG C × 3h heat treatments under the conditions of 500 DEG C is 0.51 ~ 0.60W (mK)-1。
Therefore, present embodiment have simple for process, production cost it is low and to equipment without particular/special requirement the characteristics of；It is made
Standby high alumina bubble lightweight castable bulk density is low, thermal conductivity is low, compressive resistance is high, reheating linear change rate on reheating is low, volume is steady
Qualitative good and heat insulation and preservation effect is good, is suitable for permanent ladle layer.
Claims (9)
1. a kind of preparation method of high alumina bubble lightweight castable, it is characterised in that the preparation method is：With 28~
The high alumina hollow ball of 38wt%, the flint clay of 14~30wt%, the alumina fine powder of 6~30wt%, the aluminium oxide of 6~10wt% are micro-
Powder, the fine silica powder of 1~3wt%, the aluminous cement of 2~10wt% and 1~5wt% Guangxi clay be raw material, outside
Add the calgon of the sodium tripolyphosphate and 0.1~0.5wt% of the 0.04~0.2wt% of raw material, dry-mixed 1~3min, then
The water of 7~15wt% of the additional raw material, 2~5min is to get high alumina bubble lightweight castable for mixing；
The main chemical compositions of the high alumina hollow ball are：Al2O3For 55~65wt%, SiO2For 25~35wt%；High alumina is hollow
The grain composition of ball is：Granularity is less than 8mm and the particle more than or equal to 5mm is 10~20wt%, and granularity is less than 5mm and is more than
Or the particle equal to 3mm is 30~50wt%, it is 30~60wt% that granularity, which is less than 3mm and the particle more than or equal to 1mm,；
The main chemical compositions of the flint clay are：Al2O3For 40~50wt%, SiO2For 40~60wt%, Fe2O3For 1~
3wt%；The grain composition of flint clay is：It is 50~60wt%, granularity that granularity, which is less than 1mm and the particle more than or equal to 0.5mm,
Particle less than 0.5mm and more than or equal to 0.074mm is 40~50wt%.
2. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the alumina fine powder
Al2O3Content >=88wt%, granularity≤0.088mm.
3. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the aluminium oxide is micro-
The Al of powder2O3Content >=98wt%, granularity≤3 μm.
4. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the silica
The SiO of micro mist2Content >=95wt%, granularity≤3 μm.
5. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the calcium aluminate water
The Al of mud2O3Content >=71wt%, CaO content≤30wt%, granularity≤3 μm.
6. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the Guangxi clay
SiO2Content >=40wt%, Al2O3≤ 40wt%, granularity are≤3 μm.
7. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the tripolyphosphate
The Na of sodium5P3O10Content >=98wt%, granularity≤1mm.
8. the preparation method of high alumina bubble lightweight castable according to claim 1, it is characterised in that the hexa metaphosphoric acid
The Na of sodium6P6O18Content >=98wt%, granularity≤1mm.
9. a kind of high alumina bubble lightweight castable, it is characterised in that the high alumina bubble lightweight castable is wanted according to right
The high alumina bubble lightweight prepared by the preparation method of the high alumina bubble lightweight castable described in any one of 1~8 is asked to pour
Material feeding.
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| CN106810283B (en) * | 2017-03-08 | 2020-01-10 | 焦作金鑫恒拓新材料股份有限公司 | Mullite-chromium lightweight castable |
| CN107352981B (en) * | 2017-07-12 | 2020-07-07 | 宜兴瑞泰耐火材料工程有限公司 | Corundum-mullite low-heat-conductivity high-strength wear-resistant castable for CFB boiler feed back device |
| CN107442768A (en) * | 2017-08-10 | 2017-12-08 | 张家港浦项不锈钢有限公司 | The pouring technology of steel-making continuous casting tundish permanent layer |
| CN109534831A (en) * | 2018-12-05 | 2019-03-29 | 钢城集团凉山瑞海实业有限公司 | Half cylinder of steel permanent layer castable |
| CN111423221B (en) * | 2020-03-16 | 2022-10-21 | 宝武装备智能科技有限公司 | Castable for rotary hearth furnace working layer and preparation method thereof |
| CN114213108A (en) * | 2021-12-31 | 2022-03-22 | 偃师中岳耐火材料有限公司 | Microporous lightweight castable for permanent lining of steel ladle and preparation method thereof |
| CN115466104A (en) * | 2022-08-31 | 2022-12-13 | 湖南湘钢瑞泰科技有限公司 | Light anhydrous stemming for iron-making blast furnace and preparation method thereof |
| CN116178031B (en) * | 2022-12-27 | 2024-07-30 | 上海利尔耐火材料有限公司 | Insulating layer castable for aluminum ash rotary kiln and preparation method thereof |
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| CN101293777A (en) * | 2008-06-25 | 2008-10-29 | 河南省耕生耐火材料有限公司 | High-strength light weight castable refractory |
| CN102887715A (en) * | 2011-07-22 | 2013-01-23 | 宝山钢铁股份有限公司 | Ladle permanent lining pouring material capable of rapid roasting |
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| CN101293777A (en) * | 2008-06-25 | 2008-10-29 | 河南省耕生耐火材料有限公司 | High-strength light weight castable refractory |
| CN102887715A (en) * | 2011-07-22 | 2013-01-23 | 宝山钢铁股份有限公司 | Ladle permanent lining pouring material capable of rapid roasting |
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