CN104045361A - Aluminum silica sol composite combined aluminum silicon carbide castable and preparation method thereof - Google Patents
Aluminum silica sol composite combined aluminum silicon carbide castable and preparation method thereof Download PDFInfo
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- CN104045361A CN104045361A CN201410292964.8A CN201410292964A CN104045361A CN 104045361 A CN104045361 A CN 104045361A CN 201410292964 A CN201410292964 A CN 201410292964A CN 104045361 A CN104045361 A CN 104045361A
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- aluminium silicon
- silicon sol
- mould material
- fine powder
- silicon carbide
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Abstract
The invention discloses an aluminum silica sol composite combined aluminum silicon carbide castable and a preparation method thereof. The castable is prepared from the following raw materials in percentage by weight: 25-35% of 12-8mm bauxite aggregate, 10-15% of 8-3mm bauxite aggregate, 15-20% of 3-0mm bauxite aggregate, 15-25% of <88 mu m corundum fine powder or alumina fine powder, 5-12% of <88 mu m SiC fine powder, 1-5% of <5 mu m silicon micropowder and 5-10% of <5 mu m alpha-Al2O3 micropowder. An aluminum silica sol composite binder accounting for 10-15 wt% of all the raw materials is also added. The castable has the characteristics of high moderate-temperature strength, favorable thermal shock resistance and high corrosion resistance, can implement flash baking, and enhances the turnaround efficiency of the iron ladle; and since the service life is doubled, the castable can effectively save the consumption of the refractory material.
Description
Technical field
The present invention relates to technical field of refractory materials, particularly relate to a kind of aluminium silicon sol mixed binding aluminium silicon carbide mould material and preparation method thereof.
Background technology
Traditional hot metal ladle is used the high alumina castable of aluminous cement combination more along mould material, or the A1 of aluminous cement combination
2o
3-SiC matter mould material.Because aluminous cement can be introduced certain CaO, the at high temperature Al in CaO and mould material
2o
3and SiO
2can react the feldspar compound that generates low melting point.Therefore, often cause that its resistance to fouling is low, wearing quality is low, be difficult to meet steel mill to the long-life service requirements of hot metal ladle.On the other hand, owing to adopting the mould material medium temperature intensity of aluminous cement combination low.Therefore, its anti-mechanical wear performance and anti-thermal shock poor stability.In addition,, because the mould material that adopts aluminous cement combination also needs enough curing times and baking time, in the time of rapid drying and baking, easily there is crackle and explosion in mould material, has restricted in a way all transfer efficients of hot metal ladle.
At present, about high alumina castable or A1
2o
3the pertinent literature report of-SiC matter mould material also has many, for example: 1, application number is 201210247677.6, name is called the patent of invention of " a kind of High-Alumina high-temperature flame-proof pouring material and preparation method ", and this patent of invention is by a certain proportion of high aluminium material, superfine kaolin, black mud, diabase, binding agent, short solidifying powder, lapis amiridis, zircon sand and a small amount of water mixes, ageing mixture is made.2, application number is 201310508055.9, name is called the application for a patent for invention of " boiler of power plant High-Alumina high-temperature flame-proof pouring material ", this patent application mould material comprises that following parts by weight component makes: bauxites aggregate 60～80, superfine kaolin 5～12, binding agent 5～12, silicon powder 2～8, alumina powder 2～10, water 1～5.Wherein, in the umber of bauxites aggregate 60～80, coarse aggregate accounts for 30%～40%, and middle aggregate accounts for 35%～45%, and fine aggregate accounts for 20%～30%.Binding agent comprises that following parts by weight component makes: Magnesium Silicate q-agent 20～40, phosphoric acid salt 80～60.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of hot metal ladle that has that medium temperature intensity is high, thermal shock resistance good, corrosion resistance is strong and can quick baking to continue to use aluminium silicon sol mixed binding aluminium silicon carbide mould material, and the preparation method of this silicon sol mixed binding aluminium silicon carbide mould material is provided; The invention provides a kind of aluminium silicon sol mixed binding aluminium silicon carbide mould material and preparation method thereof.
In order to address the above problem, the technical scheme that the present invention takes is:
The invention provides a kind of aluminium silicon sol mixed binding aluminium silicon carbide mould material, represent with weight percentage, in described casting material formula, contain α-Al of SiC fine powder 5～12%, < 5 μ m silicon powders 1～5% and the < 5 μ m of the corundum fine powder of alumine aggregate 15～20%, < 88 μ m of alumine aggregate 10～15%, the 3～0mm of alumine aggregate 25～35%, the 8～3mm of raw material 12～8mm or bauxitic clay fine powder 15～25%, < 88 μ m
2o
3micro mist 5～10%; Add in addition and account for above-mentioned raw materials gross weight 10～15% aluminium silicon sol combined binders.
According to above-mentioned aluminium silicon sol mixed binding aluminium silicon carbide mould material, Al in described corundum fine powder
2o
3quality percentage composition>=95%; Al in described bauxitic clay fine powder
2o
3quality percentage composition>=85%.
According to above-mentioned aluminium silicon sol mixed binding aluminium silicon carbide mould material, quality percentage composition >=90% of SiC in described SiC fine powder.
According to above-mentioned aluminium silicon sol mixed binding aluminium silicon carbide mould material, SiO in described silicon powder
2quality percentage composition>=90%.
According to above-mentioned aluminium silicon sol mixed binding aluminium silicon carbide mould material, described α-Al
2o
3al in micro mist
2o
3quality percentage composition>=97%.
According to above-mentioned aluminium silicon sol mixed binding aluminium silicon carbide mould material, the preparation method of described aluminium silicon sol combined binder is: first by ρ-Al of 30 wt%
2o
3micro mist is dispersed in the silicon sol solution of 70wt%, then adds the tripoly phosphate sodium STPP or the Sodium hexametaphosphate 99 that account for two kinds of raw material gross weights 0.5～1%, is prepared into aluminium silicon sol combined binder after mixing.
According to above-mentioned aluminium silicon sol mixed binding aluminium silicon carbide mould material, SiO in described silicon sol solution
2mass concentration be 30 ± 1%, the density of silicon sol solution is 1.19～1.21 gcm
-3(20 DEG C), SiO in silicon sol solution
2particle diameter be 10～20nm.
A preparation method for aluminium silicon sol mixed binding aluminium silicon carbide mould material, described preparation method is:
First take various raw materials according to the proportioning ratio of above-mentioned mould material, first by the alumine aggregate taking, corundum fine powder or bauxitic clay fine powder, SiC fine powder, silicon powder and α-Al
2o
3micro mist mixes, then add aluminium silicon sol combined binder to mix, mix after vibration moulding, the maintenance 4～8 hours at physical environment temperature of base substrate after moulding, the demoulding after maintenance, after the demoulding, at 120～140 DEG C, be dried 12～24 hours, after being dried, obtain product aluminium silicon sol mixed binding aluminium silicon carbide mould material.
According to the preparation method of above-mentioned aluminium silicon sol mixed binding aluminium silicon carbide mould material, the volume density of products obtained therefrom aluminium silicon sol mixed binding aluminium silicon carbide mould material is 2.60～2.85 gcm
-3.
positive beneficial effect of the present invention:
1, the mould material that mould material of the present invention is combined with aluminous cement is compared, mould material prepared by the present invention is owing to not adopting aluminous cement combination, in mould material, do not contain CaO, can production low melting point phase under high temperature, therefore, its anti-scum erosion performance strong (when the static crucible anti-slag experiment of 1450 DEG C × 3h, mould material corrosion resistance of the present invention is 2 times in conjunction with high alumina castable of traditional cement).
2, mould material of the present invention is owing to having adopted aluminium silicon sol combined binder, the ultra-fine SiO under middle temperature in bonding agent
2particle and Al
2o
3particle can react the mullite that generates anti-thermal shock good stability.Therefore, the medium temperature intensity of mould material of the present invention is high, thermal shock resistance good (under 1100 DEG C-water-cooled condition, mould material heat-shock resistance of the present invention number of times >=10 time, and traditional cement is in conjunction with heat-shock resistance number of times≤8 time of high alumina castable.）。
3, in mould material preparation process of the present invention, only need the short period of time maintenance of 4-8h hour, the curing time lower than cement in conjunction with the minimum 24h of mould material, and can quick baking, there will not be the problem of explosion.
In sum, the present invention adopts aluminium silicon sol combined binder mould material to have the advantages that medium temperature intensity is high, thermal shock resistance good, erosion-resisting characteristics is strong, and can also quick baking, improves all transfer efficients of hot metal ladle.Reach and synchronize its work-ing life with iron cinder inclusion line brick, and having solved common high alumina castable needs the problem of repairing midway, and be original two times work-ing life, the consumption that can effectively save refractory materials.
four, embodiment:
Further set forth the present invention below in conjunction with embodiment, but do not limit content of the present invention.
The each raw material specific requirement adopting in following examples is as follows:
Al in described corundum fine powder
2o
3quality percentage composition>=95%, Al in described bauxitic clay fine powder
2o
3quality percentage composition>=85%, quality percentage composition>=90% of SiC in described SiC fine powder, SiO in described silicon powder
2quality percentage composition>=90%, described α-Al
2o
3al in micro mist
2o
3quality percentage composition>=97%.
Embodiment 1:
Aluminium silicon sol mixed binding aluminium silicon carbide mould material of the present invention, represent with weight percentage, the raw material of described mould material consists of: α-Al of SiC fine powder 12%, < 5 μ m silicon powders 3% and the < 5 μ m of the alumine aggregate 15% of the alumine aggregate 25% of 12～8mm, the alumine aggregate 10% of 8～3mm, 3～0mm, the corundum fine powder 25% of < 88 μ m, < 88 μ m
2o
3micro mist 10%; Add in addition the aluminium silicon sol combined binder that accounts for above-mentioned raw materials gross weight 10%.
The preparation method of described aluminium silicon sol combined binder is: first by ρ-Al of 30 wt%
2o
3micro mist is dispersed in (SiO in described silicon sol solution in the silicon sol solution of 70wt%
2mass concentration be 30 ± 1%, the density of silicon sol solution is 1.19～1.21 gcm
-3(20 DEG C), SiO in silicon sol solution
2particle diameter be 10～20nm), then add the tripoly phosphate sodium STPP that accounts for two kinds of raw material gross weights 0.8%, after mixing, be prepared into aluminium silicon sol combined binder.
Embodiment 2:
Aluminium silicon sol mixed binding aluminium silicon carbide mould material of the present invention, represent with weight percentage, the raw material of described mould material consists of: α-Al of SiC fine powder 5%, < 5 μ m silicon powders 5% and the < 5 μ m of the alumine aggregate 20% of the alumine aggregate 35% of 12～8mm, the alumine aggregate 10% of 8～3mm, 3～0mm, the corundum fine powder 15% of < 88 μ m, < 88 μ m
2o
3micro mist 10%; Add in addition the aluminium silicon sol combined binder that accounts for above-mentioned raw materials gross weight 15%.
The preparation method of described aluminium silicon sol combined binder is: first by ρ-Al of 30 wt%
2o
3micro mist is dispersed in (SiO in described silicon sol solution in the silicon sol solution of 70wt%
2mass concentration be 30 ± 1%, the density of silicon sol solution is 1.19～1.21 gcm
-3(20 DEG C), SiO in silicon sol solution
2particle diameter be 10～20nm), then add the Sodium hexametaphosphate 99 that accounts for two kinds of raw material gross weights 0.5%, after mixing, be prepared into aluminium silicon sol combined binder.
Embodiment 3:
Aluminium silicon sol mixed binding aluminium silicon carbide mould material of the present invention, represent with weight percentage, the raw material of described mould material consists of: α-Al of SiC fine powder 11%, < 5 μ m silicon powders 1% and the < 5 μ m of the alumine aggregate 17% of the alumine aggregate 30% of 12～8mm, the alumine aggregate 13% of 8～3mm, 3～0mm, the corundum fine powder 20% of < 88 μ m, < 88 μ m
2o
3micro mist 8%; Add in addition the aluminium silicon sol combined binder that accounts for above-mentioned raw materials gross weight 12%.
The preparation method of described aluminium silicon sol combined binder is: first by ρ-Al of 30 wt%
2o
3micro mist is dispersed in (SiO in described silicon sol solution in the silicon sol solution of 70wt%
2mass concentration be 30 ± 1%, the density of silicon sol solution is 1.19～1.21 gcm
-3(20 DEG C), SiO in silicon sol solution
2particle diameter be 10～20nm), then add the Sodium hexametaphosphate 99 that accounts for two kinds of raw material gross weights 1%, after mixing, be prepared into aluminium silicon sol combined binder.
Embodiment 4:
Aluminium silicon sol mixed binding aluminium silicon carbide mould material of the present invention, represent with weight percentage, the raw material of described mould material consists of: α-Al of SiC fine powder 8%, < 5 μ m silicon powders 5% and the < 5 μ m of the alumine aggregate 20% of the alumine aggregate 35% of 12～8mm, the alumine aggregate 12% of 8～3mm, 3～0mm, the corundum fine powder 15% of < 88 μ m, < 88 μ m
2o
3micro mist 5%; Add in addition the aluminium silicon sol combined binder that accounts for above-mentioned raw materials gross weight 11%.
The preparation method of described aluminium silicon sol combined binder is: first by ρ-Al of 30 wt%
2o
3micro mist is dispersed in (SiO in described silicon sol solution in the silicon sol solution of 70wt%
2mass concentration be 30 ± 1%, the density of silicon sol solution is 1.19～1.21 gcm
-3(20 DEG C), SiO in silicon sol solution
2particle diameter be 10～20nm), then add the tripoly phosphate sodium STPP that accounts for two kinds of raw material gross weights 0.6%, after mixing, be prepared into aluminium silicon sol combined binder.
Embodiment 5:
Aluminium silicon sol mixed binding aluminium silicon carbide mould material of the present invention, represent with weight percentage, the raw material of described mould material consists of: α-Al of SiC fine powder 11%, < 5 μ m silicon powders 1% and the < 5 μ m of the alumine aggregate 18% of the alumine aggregate 28% of 12～8mm, the alumine aggregate 15% of 8～3mm, 3～0mm, the bauxitic clay fine powder 19% of < 88 μ m, < 88 μ m
2o
3micro mist 8%; Add in addition the aluminium silicon sol combined binder that accounts for above-mentioned raw materials gross weight 12%.
The preparation method of described aluminium silicon sol combined binder is: first by ρ-Al of 30 wt%
2o
3micro mist is dispersed in (SiO in described silicon sol solution in the silicon sol solution of 70wt%
2mass concentration be 30 ± 1%, the density of silicon sol solution is 1.19～1.21 gcm
-3(20 DEG C), SiO in silicon sol solution
2particle diameter be 10～20nm), then add the tripoly phosphate sodium STPP that accounts for two kinds of raw material gross weights 0.9%, after mixing, be prepared into aluminium silicon sol combined binder.
Embodiment 6:
Aluminium silicon sol mixed binding aluminium silicon carbide mould material of the present invention, represent with weight percentage, the raw material of described mould material consists of: α-Al of SiC fine powder 8%, < 5 μ m silicon powders 5% and the < 5 μ m of the alumine aggregate 20% of the alumine aggregate 32% of 12～8mm, the alumine aggregate 15% of 8～3mm, 3～0mm, the bauxitic clay fine powder 15% of < 88 μ m, < 88 μ m
2o
3micro mist 5%; Add in addition the aluminium silicon sol combined binder that accounts for above-mentioned raw materials gross weight 11%.
The preparation method of described aluminium silicon sol combined binder is: first by ρ-Al of 30 wt%
2o
3micro mist is dispersed in (SiO in described silicon sol solution in the silicon sol solution of 70wt%
2mass concentration be 30 ± 1%, the density of silicon sol solution is 1.19～1.21 gcm
-3(20 DEG C), SiO in silicon sol solution
2particle diameter be 10～20nm), then add the Sodium hexametaphosphate 99 that accounts for two kinds of raw material gross weights 0.5%, after mixing, be prepared into aluminium silicon sol combined binder.
The preparation method of above-described embodiment 1～6 aluminium silicon sol mixed binding aluminium silicon carbide mould material is:
First take various raw materials according to the proportioning ratio of mould material described in the arbitrary embodiment of embodiment 1～6, first by the alumine aggregate taking, corundum fine powder or bauxitic clay fine powder, SiC fine powder, silicon powder and α-Al
2o
3micro mist mixes, then add aluminium silicon sol combined binder to mix, mix after vibration moulding, the maintenance 4～8 hours at physical environment temperature of base substrate after moulding, the demoulding after maintenance, after the demoulding, at 120～140 DEG C, be dried 12～24 hours, (volume density is 2.60～2.85 gcm after being dried, to obtain product aluminium silicon sol mixed binding aluminium silicon carbide mould material
-3).
Utilize the performance test results of the aluminium silicon sol mixed binding mould material that embodiment 1～6 is prepared to refer to table 1.
。
Claims (9)
1. an aluminium silicon sol mixed binding aluminium silicon carbide mould material, it is characterized in that, represent with weight percentage, in described casting material formula, contain α-Al of SiC fine powder 5～12%, < 5 μ m silicon powders 1～5% and the < 5 μ m of the corundum fine powder of alumine aggregate 15～20%, < 88 μ m of alumine aggregate 10～15%, the 3～0mm of alumine aggregate 25～35%, the 8～3mm of raw material 12～8mm or bauxitic clay fine powder 15～25%, < 88 μ m
2o
3micro mist 5～10%; Add in addition and account for above-mentioned raw materials gross weight 10～15% aluminium silicon sol combined binders.
2. aluminium silicon sol mixed binding aluminium silicon carbide mould material according to claim 1, is characterized in that: Al in described corundum fine powder
2o
3quality percentage composition>=95%; Al in described bauxitic clay fine powder
2o
3quality percentage composition>=85%.
3. aluminium silicon sol mixed binding aluminium silicon carbide mould material according to claim 1, is characterized in that: quality percentage composition >=90% of SiC in described SiC fine powder.
4. aluminium silicon sol mixed binding aluminium silicon carbide mould material according to claim 1, is characterized in that: SiO in described silicon powder
2quality percentage composition>=90%.
5. aluminium silicon sol mixed binding aluminium silicon carbide mould material according to claim 1, is characterized in that: described α-Al
2o
3al in micro mist
2o
3quality percentage composition>=97%.
6. aluminium silicon sol mixed binding aluminium silicon carbide mould material according to claim 1, is characterized in that, the preparation method of described aluminium silicon sol combined binder is: first by ρ-Al of 30 wt%
2o
3micro mist is dispersed in the silicon sol solution of 70wt%, then adds the tripoly phosphate sodium STPP or the Sodium hexametaphosphate 99 that account for two kinds of raw material gross weights 0.5～1%, is prepared into aluminium silicon sol combined binder after mixing.
7. aluminium silicon sol mixed binding aluminium silicon carbide mould material according to claim 6, is characterized in that: SiO in described silicon sol solution
2mass concentration be 30 ± 1%, the density of silicon sol solution is 1.19～1.21 gcm
-3(20 DEG C), SiO in silicon sol solution
2particle diameter be 10～20nm.
8. a preparation method for aluminium silicon sol mixed binding aluminium silicon carbide mould material, is characterized in that, described preparation method is:
First take various raw materials according to the proportioning ratio of mould material described in claim 1, first by the alumine aggregate taking, corundum fine powder or bauxitic clay fine powder, SiC fine powder, silicon powder and α-Al
2o
3micro mist mixes, then add aluminium silicon sol combined binder to mix, mix after vibration moulding, the maintenance 4～8 hours at physical environment temperature of base substrate after moulding, the demoulding after maintenance, after the demoulding, at 120～140 DEG C, be dried 12～24 hours, after being dried, obtain product aluminium silicon sol mixed binding aluminium silicon carbide mould material.
9. the preparation method of aluminium silicon sol mixed binding aluminium silicon carbide mould material according to claim 8, is characterized in that: the volume density of products obtained therefrom aluminium silicon sol mixed binding aluminium silicon carbide mould material is 2.60～2.85 gcm
-3.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105367094A (en) * | 2015-11-04 | 2016-03-02 | 长兴明天炉料有限公司 | Alumina-silica environment-friendly main channel castable |
| CN110642610A (en) * | 2019-06-28 | 2020-01-03 | 广东韶钢松山股份有限公司 | Refractory brick for steel receiving opening of tundish and preparation method thereof |
| CN112094129A (en) * | 2020-10-10 | 2020-12-18 | 上海宝钢铸造有限公司 | High-temperature binder and preparation method thereof |
| CN113321495A (en) * | 2021-08-04 | 2021-08-31 | 北京利尔高温材料股份有限公司 | Cement-free high-performance pumping furnace hearth material |
| CN113636831A (en) * | 2021-09-15 | 2021-11-12 | 武汉钢铁有限公司 | Quick-drying hollow sphere heat-insulation refractory castable |
| CN114890802A (en) * | 2022-05-31 | 2022-08-12 | 湛江自立高温材料有限公司 | Slag adhesion preventing spray coating suitable for smelting clean steel and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105367094A (en) * | 2015-11-04 | 2016-03-02 | 长兴明天炉料有限公司 | Alumina-silica environment-friendly main channel castable |
| CN110642610A (en) * | 2019-06-28 | 2020-01-03 | 广东韶钢松山股份有限公司 | Refractory brick for steel receiving opening of tundish and preparation method thereof |
| CN112094129A (en) * | 2020-10-10 | 2020-12-18 | 上海宝钢铸造有限公司 | High-temperature binder and preparation method thereof |
| CN113321495A (en) * | 2021-08-04 | 2021-08-31 | 北京利尔高温材料股份有限公司 | Cement-free high-performance pumping furnace hearth material |
| CN113636831A (en) * | 2021-09-15 | 2021-11-12 | 武汉钢铁有限公司 | Quick-drying hollow sphere heat-insulation refractory castable |
| CN114890802A (en) * | 2022-05-31 | 2022-08-12 | 湛江自立高温材料有限公司 | Slag adhesion preventing spray coating suitable for smelting clean steel and preparation method and application thereof |
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Application publication date: 20140917 Assignee: Henan bamboo Qingzhou Refractories Co. Assignor: Henan bamboo grove Nai Cai Co., Ltd Contract record no.: 2016410000007 Denomination of invention: Aluminum silica sol composite combined aluminum silicon carbide castable and preparation method thereof Granted publication date: 20150826 License type: Exclusive License Record date: 20160517 |
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