CN101152983A - Flame-proof pouring material for hydroted alumina gas suspending roasting furnace furnace liner - Google Patents
Flame-proof pouring material for hydroted alumina gas suspending roasting furnace furnace liner Download PDFInfo
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- CN101152983A CN101152983A CNA2006101525962A CN200610152596A CN101152983A CN 101152983 A CN101152983 A CN 101152983A CN A2006101525962 A CNA2006101525962 A CN A2006101525962A CN 200610152596 A CN200610152596 A CN 200610152596A CN 101152983 A CN101152983 A CN 101152983A
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- flint clay
- clay grog
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Abstract
The present invention provides a fire-resistant castable material of furnace lining for aluminum hydroxide gas suspension baking furnace. The fire-resistant castable material is a mixture of sintered coke sapphire chamotte and fine-grained mullite of good crystal structure in the sintering process, binder and composite additive according to different proportions; the lining of a main furnace body for aluminum hydroxide gas suspension baking furnace is prepared after furnace building, furnace baking and sintering; wherein, the percentage of composition of raw materials is: 27 to 33 percent of coke sapphire chamotte less than 3mm, 25 to 30 percent of coke sapphire chamotte with a particle size between 3mm and 5mm, 8 to 15 percent of coke sapphire chamotte with a particle size between 5mm and 8mm, and 15 to 25 percent of fine-grained mullite powder with a particle size less than 0.074mm. The binder uses activated alumina of rho- Al2O3 of 5 to 8 percent; the composite additive uses high-dispersion oxidated alpha- Al2O3, superfine powder and silicon oxide SiO2; the contents of the superfine powder and the silicon oxide are respectively 2 to 5 percent; the particle size of the superfine powder is less than 5 Mu m; the content of sodium tripolyphosphate is 0.1 to 0.3 percent.
Description
Technical field
The present invention relates to a kind of hydroted alumina gas suspending roasting furnace furnace liner refractory castable that is used for, is matrix with thin brilliant mullite particularly, and the flint clay grog is a particulate material, α-Al
2O
3And SiO
2Super-fine powder is a composite additive, with ρ-Al
2O
3As the furnace lining material that wedding agent is formed, be suitable for the special industrial and mineral conditional request of hydroted alumina gas suspending roasting furnace main furnace body.
Background technology
At present, the domestic also manufacturer of this kind product specialization not.The stoving oven main furnace body fire proof material of furnace lining of most of production of aluminum hydroxide enterprise, still adopt the high alumina general proportions of two kinds of granularities to mix after,, form as wedding agent with liquid soluble glass by mixing-stirring-cast-baking.This method technology is coarse, and performance is inferior, and the furnace lining material that sinters into is short work-ing life, and often shutdown maintenance has a strong impact on production.Hot strength is low in mainly showing, heat-shock resistance is poor, and volume stability is bad, not wear-resistant washing away, and also construction and transportation cost are higher.
Pertinent data shows, the traditional refractory castable of hydroted alumina gas suspending roasting furnace main furnace body furnace lining generally is to be about 25% by one-level high alumina particle 0-8mm content, and 0-4mm content is about 36%, one-level high alumina powder 39%, and density is 1.3g/cm
3Above water glass solution about 10% forms as wedding agent mixing-stirring-cast-baking-sintering.Burning the main oven refractory body in back close is 2.7g/cm
3More than.The heat-shock resistance of one-level high alumina is poor, and the introducing of water glass makes wherein hot strength reduction again, and is not wear-resistant, shrink greatly when working temperature mould material more than 1000 ℃ the time, the volume instability forms than multiple cracks the lining body, until peeling off, fall piece, thereby have influence on the lining body life time.This mould material is because will be with liquid soluble glass as wedding agent, so just increased transportation and promoted cost.Because of the water glass thickness, mix and stir weak effect in the short period of time, mix the time of stirring so increased again, operating efficiency is reduced.Simultaneously, because of the big 0.35g/cm of one-level high alumina density than flint clay grog and thin brilliant mullite
3So, not only increased material usage and body of heater load, and made the thermal conductivity of this mould material become big, increased heat-energy losses, reduced the heat-shock resistance of material.
Prior art before this has CN1440952A, CN1785908A, CN1323761A, because they use cement as jointing compound, and starting material and the proportioning difference thereof used, cause that its intensity is low, volume stability is bad, be not suitable for the atmosphere of alumina roasting furnace, can not be as the mould material of producing aluminum oxide.The applicant according to the special industrial and mineral condition of aluminium hydroxide suspension roaster, adjusts starting material and proportioning thereof through research, overcome defective in the prior art, significantly improved wearability, heat-shock resistance, volume stability, the life-span is long, has satisfied the requirement of property.
Summary of the invention
It is convenient to the purpose of this invention is to provide a kind of brickwork, and save energy reduces cost, and is wear-resistant, anti-thermal shock, volume stability, the refractory castable that long hydroted alumina gas suspending roasting furnace furnace liner of life-span is used.
Technical scheme of the present invention is: adopting through agglomerating flint clay grog and make particulate material, is the matrix material through the thin brilliant mullite powder of agglomerating, with ρ-Al
2O
3As wedding agent, SiO
2And α-Al
2O
3Super-fine powder is a composite additive, and tripoly phosphate sodium STPP.The weight percent of its various materials is:
Flint clay grog, particle diameter are＜3mm that content is 27～33%
Flint clay grog, particle diameter are 3-5mm, and content is 25～30%
Flint clay grog, particle diameter are between 5mm and 8mm, and content is 8～15%
Thin brilliant mullite powder, particle diameter＜0.074mm, content are 13～20%
ρ-Al
2O
3, content is 5～8%
α-Al
2O
3Super-fine powder, content are 2～5%
SiO
2Super-fine powder, content are 2～5%
Tripoly phosphate sodium STPP, content are 0.1～0.3%
Wherein, the particle diameter of super-fine powder is less than 5 μ m.
General all think the Al that makes furnace lining material
2O
3Content is high more, and liner intensity is big more, and refractoriness is high more, and furnace lining can be used safely more, thus often select the one-level high aluminium material as main raw material, Al wherein
2O
3〉=80%, Al in the mould material of making
2O
3〉=70%, still, we found through experiments, with the mould material that above-mentioned materials is made, when stove moved less than half a year, the furnace lining crackle was more, local lining body has the piece of falling, peeling phenomenon, the attenuation of lining body, in addition, the furnace shell outside wall temperature is between 200～280 ℃, and it is more to conduct heat, thermosteresis is big, and particularly piece is fallen in the part, has influence on normal production, be forced to shutdown maintenance, the general overhaul cycle is the 2-3 year.
When adopting through agglomerating flint clay grog is particulate material, is powder through the thin brilliant mullite of agglomerating, and then effect is made a world of difference, and the composition of flint clay grog and thin brilliant mullite sees Table 1
Table 1
As shown in Table 1, the main raw material Al of refractory castable of the present invention
2O
3Content is lower, so its thermal conductivity is lower, has reduced heat-energy losses, simultaneously, because the generation of mullite and secondary mullite is arranged, makes the lining body produce enough intensity and thermal shock resistance again.α-Al in the mould material
2O
3And SiO
2Super-fine powder is acting in conjunction at a certain temperature, forms a large amount of mullite crystalline phases in matrix, forms fine and close reticulated structure with staggered bar-shaped xln, and therefore, lining body intensity is higher.Because secondary mulliteization also is attended by faint volumetric expansion, from and slowed down that low aluminum feedstock sintering shrinks and defectives such as the volume instability that causes, crackle, thereby make lining body good integrity, more stable, the various aspects of performance coupling has rationally prolonged furnace life.
It is the grain size distribution of flint clay grog that there is another factor of material impact in furnace life, and coarse particles plays skeleton function, and its scour resistance is good, the refractoriness height, but its surface-area is little, and easy-sintering is not incomplete with the reaction of wedding agent, additive yet, cause that easily furnace lining is loose, therefore, add-on is wanted suitably.The flint clay grog of 3-5mm is processed into pyramid-shaped, helps furnace construction engineering, increases lining body intensity.Flint clay grog less than 3mm can be filled coarse grained space, forms tightly packedly, impels sintering.Thin brilliant mullite powder less than 0.074mm mainly plays gluing or nodulizing.In addition, the α-Al of adding
2O
3And SiO
2Super-fine powder covers at various particle surfaces, and from liquid phase in theory, it has been connected carse, medium and small particle, has improved furnace lining density, has improved sintering and reactivity worth significantly, has solved the lining problem that body tissue is loose, intensity is low, easy to wear.
Be in the past with pure calcium aluminate cement or water glass as wedding agent, like this, though that the lining body forms intensity is very fast, because CaO, Na
2O mixes, and the middle hot strength of lining body is weakened, but this temperature is the working temperature of hydroted alumina gas suspending roasting furnace main furnace body just.And use ρ-Al instead
2O
3As wedding agent, at first be ρ-Al
2O
3This is as alumina product, so that the product that roasting goes out can not polluted or pollute is minimum, secondly is that such lining body intensity improves with temperature, unidirectional in rising trend, the lining body is along with the carrying out of baker work, and intensity continues to rise, volume stability is reliable, longer service life.
The adding of tripoly phosphate sodium STPP has greatly improved the material segregation, and pore is bigger than normal, the phenomenon that tissue odds is even, make mixing of materials abundant, be evenly distributed, react completely, tissue is stable, significantly reduce the add-on of water, shortened furnace drying time, improved various performance index.The add-on of tripoly phosphate sodium STPP is 0.1～0.3%
Because the furnace lining material grain size proportion is reasonable, and directly mixes and stirs with clean water, therefore, select for use and convenient transportation, cost is lower, when brickwork, mix and stir, the cast vibration, convenient and easy, the lining body is in conjunction with tight, it is more to form the mullite amount, and various performance index are all more satisfactory, improved work-ing life more than 2 times than originally, detect through national refractory quality supervision and inspection, the detected result of hydroted alumina gas suspending roasting furnace main furnace body furnace lining refractory castable provided by the invention sees Table 2
Table 2
| Density | 2.35-2.4g/cm 3 |
| Thermal conductivity | 1.0-1.1w/m·k |
| Strength at normal temperature after 1200 ℃ of burnings | 10～12MPa |
| Normal temperature ultimate compression strength after 1200 ℃ of burnings | 100～110MPa |
| Refractoriness | 1730～1760℃ |
| Burn back line velocity of variation | 0 |
| After 1100 ℃ of water-cooleds, thermal shock resistance (number of times) | 30 times |
Embodiment
Embodiment 1
Select mineral resources in strict accordance with each material chemical component scope,, get starting material such as varigrained flint clay grog and thin brilliant mullite powder and press column weight amount per-cent proportioning through after fragmentation-grinding-sieving and grading-magnetic separation:
The flint clay grog, particle diameter＜3mm, 30%
The flint clay grog, particle diameter 3-5mm, 28%
Flint clay grog, particle diameter between 5mm and 8mm, 10%
Thin brilliant mullite powder, particle diameter＜0.074mm 16%
ρ-Al
2O
3 6.8％
α-Al
2O
3Super-fine powder 5%
SiO
2Super-fine powder 4%
Tripoly phosphate sodium STPP 0.2%
Wherein, the particle diameter of super-fine powder is less than 5 μ m
After adding the water thorough mixing and stirring, brickwork-baking-sintering forms furnace lining, and its performance index detected result sees Table 3, and actual service life is at 6-8.
Embodiment 2
Operation is with embodiment 1, but its raw-material weight percent is:
The flint clay grog, particle diameter＜3mm 29%
Flint clay grog, particle diameter are 3-5mm 29%
Flint clay grog, particle diameter are between 5mm and 8mm 11%
Thin brilliant mullite powder, particle diameter＜0.074mm 15%
ρ-Al
2O
3 7％
α-Al
2O
3Super-fine powder 3.8%
SiO
2Super-fine powder 5%
Tripoly phosphate sodium STPP 0.2%
Wherein, the particle diameter of super-fine powder is less than 5 μ m
Detected result sees Table 3, and be original more than 2 times work-ing life.
Embodiment 3
Operation is with embodiment 1, and its raw-material weight percent is:
The flint clay grog, particle diameter＜3mm 31%
Flint clay grog, particle diameter are 3-5mm 26%
Flint clay grog, particle diameter are between 5mm and 8mm 11%
Thin brilliant mullite powder, particle diameter＜0.074mm 17%
ρ-Al
2O
3 6.6％
α-Al
2O
3Super-fine powder 3.2%
SiO
2Super-fine powder 5%
Tripoly phosphate sodium STPP 0.2%
Wherein, the particle diameter of super-fine powder is less than 5 μ m
Detected result sees Table 3, and be original more than 2 times work-ing life.
Table 3
| Performance | Embodiment 1 | Embodiment 2 | Embodiment 3 |
| Density g/cm 3 | 2.38 | 2.4 | 2.39 |
| Thermal conductivity w/mk | 1.08 | 1.1 | 1.09 |
| Strength at normal temperature MPa after 1200 ℃ of burnings | 11.5 | 12 | 11 |
| Normal temperature ultimate compression strength MPa after 1200 ℃ of burnings | 107 | 110 | 108 |
| Refractoriness ℃ | 1740 | 1760 | 1750 |
| Burn back line velocity of variation | 0 | 0 | 0 |
| After 1100 ℃ of water-cooleds, thermal shock resistance (number of times) | 30 | 30 | 30 |
Claims (4)
1. refractory castable that is used for hydroted alumina gas suspending roasting furnace furnace liner, the mixture of forming by different ratios by flint clay grog and thin brilliant mullite, wedding agent, composite additive, through brickwork, baker, sintering forms, it is characterized in that the mullite and the flint clay grog that use sintering to cross, various raw-material weight percents are:
The flint clay grog, particle diameter＜3mm, content are 27～33%
The flint clay grog, 3-5mm, content are 25～30%
Flint clay grog, particle diameter are between 5mm and 8mm, and content is 8～15%
Thin brilliant mullite powder, particle diameter＜0.074mm, content are 15～25%
Wedding agent adopts ρ-Al
2O
3, its content is 5～8%
Composite additive adopts α-Al
2O
3Super-fine powder and SiO
2Super-fine powder, content respectively are 2～5%
Tripoly phosphate sodium STPP, content are 0.1～0.3%
Wherein, the particle diameter of super-fine powder is less than 5 μ m.
2. the refractory castable that is used for hydroted alumina gas suspending roasting furnace furnace liner according to claim 1 is characterized in that raw-material weight percent is:
The flint clay grog, particle diameter＜3mm, 30%
The flint clay grog, particle diameter 3-5mm, 28%
Flint clay grog, particle diameter between 5mm and 8mm, 10%
Thin brilliant mullite powder, particle diameter＜0.074mm 16%
ρ-Al
2O
3 6.8％
α-Al
2O
3Super-fine powder 5%
SiO
2Super-fine powder 4%
Tripoly phosphate sodium STPP 0.2%.
3. the refractory castable that is used for hydroted alumina gas suspending roasting furnace furnace liner according to claim 1 is characterized in that raw-material weight percent is:
The flint clay grog, particle diameter＜3mm 29%
Flint clay grog, particle diameter are 3-5mm 29%
Flint clay grog, particle diameter are between 5mm and 8mm 11%
Thin brilliant mullite powder, particle diameter＜0.074mm 15%
ρ-Al
2O
3 7％
α-Al
2O
3Super-fine powder 3.8%
SiO
2Super-fine powder 5%
Tripoly phosphate sodium STPP 0.2%.
4. the refractory castable that is used for hydroted alumina gas suspending roasting furnace furnace liner according to claim 1 is characterized in that raw-material weight percent is:
The flint clay grog, particle diameter＜3mm 31%
Flint clay grog, particle diameter are 3-5mm 26%
Flint clay grog, particle diameter are between 5mm and 8mm 11%
Thin brilliant mullite powder, particle diameter＜0.074mm 17%
ρ-Al
2O
3 6.6％
α-Al
2O
3Super-fine powder 3.2%
SiO
2Super-fine powder 5%
Tripoly phosphate sodium STPP 0.2%.
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|---|---|---|---|
| CNB2006101525962A CN100509704C (en) | 2006-09-29 | 2006-09-29 | Flame-proof pouring material for hydroted alumina gas suspending roasting furnace furnace liner |
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|---|---|---|---|
| CNB2006101525962A CN100509704C (en) | 2006-09-29 | 2006-09-29 | Flame-proof pouring material for hydroted alumina gas suspending roasting furnace furnace liner |
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| CN100509704C CN100509704C (en) | 2009-07-08 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101362654B (en) * | 2008-09-18 | 2011-07-27 | 武汉科技大学 | Organic-inorganic combined binder for casting material and preparation method thereof |
| CN102180680A (en) * | 2011-02-22 | 2011-09-14 | 佘成其 | Energy-saving blast furnace blowpipe material |
| CN101417884B (en) * | 2008-11-19 | 2012-04-25 | 高树森 | Nano Al2O3 film encapsulated carbon-aluminum spinelle refractory castable and preparation method thereof |
| CN101633578B (en) * | 2009-08-21 | 2013-04-17 | 巩义市五耐科技开发有限公司 | Special type composite low alumina mullite brick and preparation method thereof |
| CN104163639A (en) * | 2014-07-10 | 2014-11-26 | 陈莹 | Ceramic plate and preparation method thereof |
| CN105948765A (en) * | 2016-04-27 | 2016-09-21 | 江西荣恩能源科技有限公司 | Mullite phosphate and chamotte phosphate refractory ramming material and preparation method thereof |
| CN109293380A (en) * | 2018-11-28 | 2019-02-01 | 江苏恒耐炉料集团有限公司 | A kind of low temperature crusting resistant pouring material |
| CN113651620A (en) * | 2021-08-13 | 2021-11-16 | 宜兴市海科窑炉工程有限公司 | Ceramic high-wear-resistance sealing refractory brick for ceramic heat exchanger and manufacturing method thereof |
| CN114890007A (en) * | 2022-06-17 | 2022-08-12 | 巩义市富康耐材有限公司 | High-strength composite ceramic wear-resistant lining and preparation method thereof |
| CN117164217A (en) * | 2023-11-02 | 2023-12-05 | 淄博工陶新材料集团有限公司 | Self-flow casting formed hole sealing material for molten tin bath bottom brick, and preparation method and application thereof |
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2006
- 2006-09-29 CN CNB2006101525962A patent/CN100509704C/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101362654B (en) * | 2008-09-18 | 2011-07-27 | 武汉科技大学 | Organic-inorganic combined binder for casting material and preparation method thereof |
| CN101417884B (en) * | 2008-11-19 | 2012-04-25 | 高树森 | Nano Al2O3 film encapsulated carbon-aluminum spinelle refractory castable and preparation method thereof |
| CN101633578B (en) * | 2009-08-21 | 2013-04-17 | 巩义市五耐科技开发有限公司 | Special type composite low alumina mullite brick and preparation method thereof |
| CN102180680A (en) * | 2011-02-22 | 2011-09-14 | 佘成其 | Energy-saving blast furnace blowpipe material |
| CN104163639A (en) * | 2014-07-10 | 2014-11-26 | 陈莹 | Ceramic plate and preparation method thereof |
| CN105948765A (en) * | 2016-04-27 | 2016-09-21 | 江西荣恩能源科技有限公司 | Mullite phosphate and chamotte phosphate refractory ramming material and preparation method thereof |
| CN109293380A (en) * | 2018-11-28 | 2019-02-01 | 江苏恒耐炉料集团有限公司 | A kind of low temperature crusting resistant pouring material |
| CN113651620A (en) * | 2021-08-13 | 2021-11-16 | 宜兴市海科窑炉工程有限公司 | Ceramic high-wear-resistance sealing refractory brick for ceramic heat exchanger and manufacturing method thereof |
| CN114890007A (en) * | 2022-06-17 | 2022-08-12 | 巩义市富康耐材有限公司 | High-strength composite ceramic wear-resistant lining and preparation method thereof |
| CN114890007B (en) * | 2022-06-17 | 2024-03-08 | 巩义市富康耐材有限公司 | Preparation method of high-strength composite ceramic wear-resistant lining |
| CN117164217A (en) * | 2023-11-02 | 2023-12-05 | 淄博工陶新材料集团有限公司 | Self-flow casting formed hole sealing material for molten tin bath bottom brick, and preparation method and application thereof |
| CN117164217B (en) * | 2023-11-02 | 2024-01-09 | 淄博工陶新材料集团有限公司 | Self-flow casting formed hole sealing material for molten tin bath bottom brick, and preparation method and application thereof |
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