CN102701763A - Low-aluminum sintered alumina-silica refractory material and preparation method thereof - Google Patents
Low-aluminum sintered alumina-silica refractory material and preparation method thereof Download PDFInfo
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Abstract
The invention relates to a sintered alumina-silica refractory material. The sintered alumina-silica refractory material comprises aggregate, powder and additive; the aggregate comprises one or mixture of at least two of mullite, alumina and flint clay and silicon carbide; the powder comprises mud; and the additive comprises an organic bonding agent. The invention also provides the preparation method for the refractory material. The refractory material is low in price, and high in high temperature resistance, erosion resistance, thermal shock resistance and wear resistance and low in heat-conducting property and used for the cold ends of a decomposition band and a transition band of a rotary cement kiln, can replace the conventional anti-stripping high-alumina brick and the conventional anti-stripping silicon mullite brick; and the requirements of the cement kiln on low heat conduction and alkali eclipse resistance of the refractory material can be met, the radiation loss can be reduced, and the service life of the kiln is prolonged, and the economic benefit of the kiln is improved.
Description
Technical field
The present invention relates to a kind of sintered aluminium siliceous refractory [material and preparation method thereof, particularly, the present invention relates to a kind of low aluminum sinter aluminum silica refractory and preparation method thereof.
Background technology
China is manufacture of cement state the biggest in the world.2011, China not only cement output reached 2,000,000,000 tons, accounts for 60% of global cement output, and new dry cement production technology has obtained large-scale popularization.So Chinese cement industry has reflected the M.L. that world's cement is made substantially.At present, the transitional zone cold junction of cement in China rotary kiln mainly adopts siliceous mullite brick, divides the main anti-peeling high aluminium brick that adopts that ungirds, and kiln tail preheater mainly adopts alkaline-resisting brick.
It is that main raw material is processed that siliceous mullite brick adopts high-quality special grade bauxite and silit, also special type fire raw materials such as admixture corundum, mullite, andaluzite, alumina powder.But, press existing standard, the alumina content of siliceous mullite brick must be greater than 60%, and too high alumina content has increased the thermal conductivity of refractory materials.Thermal conductivity is too high, has increased the heat radiation of kiln lining, is unfavorable for energy-saving and emission-reduction.
It is that main raw material is processed that the anti-peeling high aluminium brick adopts high-quality special grade bauxite and zircon, but also adopt kyanite sometimes, replacement zircons such as andaluzite, sillimanite process.Press existing standard, the alumina content of siliceous mullite brick must be greater than 70%, and too high alumina content also is unfavorable for the thermal conductivity of refractory materials.In addition, zirconium is a kind of rare elements.The zircon of China can not be self-supporting, needs a large amount of imports.In decades, the price of zircon is unprecedented soaring, from below 1000 yuan/ton, soars to more than 10000 yuan/ton.
The soft flame-proof clay that alkaline-resisting brick adopts pocket clay grog, high silicon fireclay and has a good combination property is processed.Press existing standard, the alumina content of alkaline-resisting brick is 25-30%.If alumina content is greater than 35%, the alkali resistance of aluminum silica refractory will suffer damage.For improving alkali resistance, require alkaline-resisting brick to contain more K
2O and Na
2O is with quick formation R
2O-Al
2O
3Glassy phase, this has just damaged the high thermal resistance of refractory materials.
From the angle of resource, the reserves of China's bauxitic clay account for the 5th in the world, are the 1st in the world but consume.Because long-term gopher and a large amount of outlets, the bauxitic clay resource is seriously damaged, the refractory materials bauxite clinker, and particularly the high-quality high grade bauxite is in rather short supply, and price is constantly soaring.
In sum, on the performance of siliceous mullite brick, antistripping brick, alkaline-resisting brick all deficiencies are arranged, alumina content or greater than 60% on the composition, or, do not have the refractory materials between the alumina content 30%-60% less than 30%.In addition, high grade bauxite and zircon worsening shortages again.So, need fill up composition blank, development resource substitute technology, develop the aluminum silica refractory of a series of alumina contents between 30-60%.
Summary of the invention
One of the object of the invention is to provide the sintered aluminium siliceous refractory [material of a kind of alumina content between 30-60%.Said refractory materials is that a kind of alumina content is the low aluminium siliceous mullite brick of 30-60%, and it adopts middle aluminum-containing mullite, low aluminum-containing mullite, three, level Four alumine or flint clay, silit, alumina micro mist, ooze or silicon ash and organic additive formulated.The alumina content of material is 30-60%; Have good high temperature resistant, anti-erosion, heat-resisting shake, wear-resistant, low heat conductivity can; The branch that can be used for cement rotary kiln ungirds, kiln tail and the higher position of tertiary-air pipe temperature, has substituted existing anti-peeling high aluminium brick and alkaline-resisting brick, has improved refractory materials high thermal resistance, alkali resistant erosion property and heat-shock resistance; Prolong the life-span of refractory materials, increased the economic benefit of cement production enterprise.
In order to achieve the above object, the present invention has adopted following technical scheme:
Sintered aluminium siliceous refractory [material according to the invention comprises aggregate, powder and admixture, and be described below its concrete composition:
Said aggregate comprises the mixture and the silit of a kind of in mullite, alumina and the flint clay or at least two kinds.Mean, said aggregate can comprise any one or any two kinds mixture or three kinds the mixture in mullite, alumina and the flint clay.Said mixture is the mixture of mullite and alumina for example, the mixture of mullite and flint clay, the mixture of alumina and flint clay, the mixture of mullite, alumina and flint clay.
Said powder comprises ooze; Admixture comprises organic bond.
Alumina content with refractory materials of above-mentioned composition is 30 ~ 60wt%; For example 32wt%, 34wt%, 36wt%, 38wt%, 40wt%, 42wt%, 44wt%, 46wt%, 48wt%, 50wt%, 52wt%, 54wt%, 56wt%, 58wt%, 59wt%; Preferred 35 ~ 60wt%, further preferred 40 ~ 60wt%.
Mullite is Al
2O
3-SiO
2The binary compound of unique stable existence under the normal pressure in the two component system, chemical formula is 3Al
2O
3-2SiO
2, natural mullite is considerably less, usually with synthetic such as sintering process or electric smelting methods.Preferably, said mullite is that middle aluminum-containing mullite is or/and high aluminum-containing mullite.Aluminum-containing mullite and low aluminum-containing mullite are commercially available refractory raw material of the same name in said, comprise by alumina raw material synthetic high-purity mullite with by alumina replacing aluminum oxide synthetic alumina base mullite raw material.The purity of high-purity mullite is high, performance is good, but expensive, alumina base mullite is used for substituting high-purity mullite.Middle aluminum-containing mullite and low aluminum-containing mullite are artificial synthetic refractory raw material.The alumina content of middle aluminum-containing mullite is 52-67%, can use three stones synthetic as main raw material.The alumina content of low aluminum-containing mullite is 42-52%, can use kaolinite synthetic as main raw material.In the principal character of aluminium and low aluminum-containing mullite be to pass through homogenizing, allotment, fine grinding and burn till being higher than under 1595 ℃ the temperature; Make the fusion of cristobalite phase and after cooling, form vagcor; Thereby have lower thermal expansivity and better heat-shock resistance, all be available commercially.The interpolation of mullite is mainly used in the fundamental property that guarantees refractory materials, like high temperature resistant, anti-thermal shock, erosion-resisting characteristics.
Preferably, said mullite is that granularity is 3-1mm, the 1-0mm, < mixture of a kind of in the mullite of 0.088mm or at least two kinds.Said mixture for example granularity is the mixture of the mullite of 3-1mm and 1-0mm; Granularity is 3-1mm and the < mixture of the mullite of 0.088mm; Granularity is that < mixture of the mullite of 0.088mm and 1-0mm, granularity are 3-1mm, 1-0mm and the < mixture of the mullite of 0.088mm.
Said alumina is an alumine, and preferred three grades of alumines are or/and the level Four alumine.Said alumine is commercially available alumine refractory raw material, and the present invention is typical but nonrestrictive finger is calcined the alumina refractory raw material of rear oxidation aluminium content at 50%-90%.The present invention is typical but nonrestrictive three grades of alumines refer to that alumina content is the alumina of 55%-60%; The present invention typical case but nonrestrictive level Four alumine refers to alumina content is the alumina of 45%-55%.Alumina is formed by natural alumina calcining, and synthetic through homogenizing, allotment, fine grinding and high temperature because of not, its performance is lower than mullite synthesizing, but price is lower, and alumina is used for substituting the mullite raw material.Said alumine, three grades of alumines and level Four alumine all can commercially availablely obtain.
Preferably, said alumina is that granularity is 3-1mm, the 1-0mm, < mixture of a kind of in the alumina of 0.088mm or at least two kinds.Said mixture for example granularity is the mixture of the alumina of 3-1mm and 1-0mm; Granularity is 3-1mm and the < mixture of the alumina of 0.088mm; Granularity is that < mixture of the alumina of 0.088mm and 1-0mm, granularity are 3-1mm, 1-0mm and the < mixture of the alumina of 0.088mm.
Preferably, said flint clay is that granularity is 3-1mm, the 1-0mm, < mixture of a kind of in the flint clay of 0.088mm or at least two kinds.Said mixture for example granularity is the mixture of the flint clay of 3-1mm and 1-0mm; Granularity is 3-1mm and the < mixture of the flint clay of 0.088mm; Granularity is that < mixture of the flint clay of 0.088mm and 1-0mm, granularity are 3-1mm, 1-0mm and the < mixture of the flint clay of 0.088mm.
Said flint clay is commercially available raw material of the same name, is used for replacing the level Four alumina.
Said silit is commercially available raw material of the same name, is used for improving anti-thermal shock and corrosion-resistant property.Preferably, the granularity of said silit is that 1-0mm is or/and < 0.088mm.Said silit is commercially available silit refractory raw material.Wherein, the carbide fine powder oxidation is very fast, is mainly used in sealed porosity; The oxidation of silit particulate is slower, is mainly used in the raising use properties.
Powder according to the invention can only comprise ooze, and as optimal technical scheme, said powder also comprises the alumina micro mist, and preferred said powder also comprises alumina powder or/and silicon is grey.
Said ooze is the soft bonding clay of commercially available refractory materials, is used to improve the processability of brickmaking pug, and reduces sintering temperature and apparent porosity as sintering aid, improves the intensity of goods and the effect of density.
Said alumina micro mist be commercially available superfine or/and one-level alumine micro mist is used for the instead of alumina micro mist, reduce the expense of buying raw material and the production cost of refractory materials.The present invention is typical but nonrestrictive special grade bauxite micro mist refers to Al
2O
3Alumina micro mist greater than 85%.The present invention is typical but nonrestrictive one-level alumine micro mist refers to Al
2O
3It is 70 ~ 85% alumina micro mist.
Said alumina powder is the commercial alumina micro mist, is used to improve the dense accumulation degree, reduces the apparent porosity of base substrate, in sintering, with the siliceous raw material rapid reaction, forms the mullite phase, reduces firing deformation, improves the high temperature resistant and thermal shock resistance of material.
Said silicon ash is commercially available silicon ash raw material, is used for substituting ooze.
Wedding agent is used for refractory materials and mainly works to combine the brickmaking material.Wedding agent according to type can be divided into: inorganic bonding agent and organic bond.Inorganic bonding agent comprises ceramic bond, metallic bond, magnesia wedding agent.Organic bond comprises resinoid bond, gum cement.Organic bond according to the invention is selected from a kind of or at least two kinds mixture in the aqueous solution (CMC) of the aqueous solution (PVA), CMC 99.5 of lignosulfite, Z 150PH.Said mixture is the mixture of the aqueous solution of the aqueous solution and the Z 150PH of CMC 99.5 for example; The mixture of the aqueous solution of lignosulfite and CMC 99.5; The aqueous solution of Z 150PH and the mixture of lignosulfite, the mixture of the aqueous solution of CMC 99.5, the aqueous solution of Z 150PH and lignosulfite.
Preferably, the concentration of the aqueous solution of Z 150PH is 2 ~ 10wt%, for example 3wt%, 4wt%, 5wt%, 6wt%, 7wt%, 8wt%, 9wt%, preferred 2.5 ~ 9wt%, further preferred 3 ~ 8wt%.
Preferably, the concentration of the aqueous solution of said CMC 99.5 is 0.5 ~ 5wt%, for example 1wt%, 1.5wt%, 2wt%, 2.5wt%, 3wt%, 3.5wt%, 4wt%, 4.5wt%, preferred 1 ~ 4wt%, further preferred 1 ~ 3wt%.
Preferably, admixture also comprises organic acid or/and water reducer.
Preferably, said organic acid is selected from the mixture of a kind of in tartrate, Hydrocerol A, oxalic acid, the maleic acid or at least two kinds, and said mixture is the mixture of maleic acid and oxalic acid for example; Hydrocerol A and tartaric mixture; The mixture of oxalic acid and Hydrocerol A, the mixture of tartrate and maleic acid, oxalic acid, Hydrocerol A and tartaric mixture; The mixture of maleic acid, oxalic acid and Hydrocerol A; The mixture of tartrate, maleic acid and oxalic acid, maleic acid, oxalic acid, Hydrocerol A and tartaric mixture, the mixture of a kind of in preferred tartrate, Hydrocerol A, the oxalic acid or at least two kinds.Said organic acid plays combination water dissolubility high volence metal ion, improves powder dispersity, keeps the processability effect of brickmaking material.
Preferably, said water reducer is selected from the mixture of a kind of in third generation cement water reducing agent, s-generation cement water reducing agent, ZX-I, ROHM, tripoly phosphate sodium STPP, the Sodium hexametaphosphate 99 or at least two kinds.Said mixture is the mixture of Sodium hexametaphosphate 99 and tripoly phosphate sodium STPP for example; The mixture of ROHM and ZX-I; The mixture of s-generation cement water reducing agent and third generation cement water reducing agent; The mixture of third generation cement water reducing agent and Sodium hexametaphosphate 99, tripoly phosphate sodium STPP and polyacrylic mixture, the mixture of ZX-I and s-generation cement water reducing agent; Sodium hexametaphosphate 99, tripoly phosphate sodium STPP and polyacrylic mixture; The mixture of ZX-I, s-generation cement water reducing agent and third generation cement water reducing agent, the mixture of Sodium hexametaphosphate 99, tripoly phosphate sodium STPP, ROHM and ZX-I, the mixture of s-generation cement water reducing agent, third generation cement water reducing agent, Sodium hexametaphosphate 99 and tripoly phosphate sodium STPP.Said third generation cement water reducing agent and s-generation cement water reducing agent are existing procucts, can commercially availablely obtain.Said water reducer works to improve powder dispersity.
As preferred version, said aggregate comprises by the weight percent of its each ingredients constitute aggregate and powder quality sum:
Said 0.088mm silit weight percent is 0 ~ 12%, and wherein " 0 " expression, said refractory materials does not contain < 0.088mm silit.
The weight percent of the mixture of a kind of in 3-1mm mullite, alumina and the flint clay or at least two kinds is 30 ~ 45%, for example 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, 41%, 42%, 43%, 44%, 45%.
The weight percent of the mixture of a kind of in 1-0mm mullite, alumina and the flint clay or at least two kinds is 5 ~ 15%, for example 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%.
The weight percent of 1-0mm silit is 5 ~ 15%, for example 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%.
The weight percent of the mixture of a kind of in 0.088mm mullite, alumina and the flint clay or at least two kinds is 5 ~ 30%, for example 7%, 9%, 11%, 13%, 15%, 17%, 19%, 21%, 23%, 25%, 27%, 29%.
The weight percent of 0.088mm silit is 0 ~ 12%, for example 1%, 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 11%.
Aggregate according to the invention adopts the raw material of the granularity that varies in size, and the coarse aggregate that granularity is big has occupied the big portion space of material, the space of the fine aggregate filling coarse aggregate that granularity the is little, < space of the fine powder filling coarse-fine aggregate of 0.088mm; Thus; Form the structure formation of so-called " dense accumulation ", and the particle of suitable powder particle size when helping being shaped is tightly packed; Improve the shaping green density, help sintering.
As preferred version, said powder comprises by the weight percent of its each ingredients constitute aggregate and powder quality sum:
Alumina powder is or/and alumina micro mist 0 ~ 8%
Ooze is or/and silicon ash 4 ~ 25%.
Said alumina powder is or/and the weight percent of alumina micro mist is 0 ~ 8%, for example 0.5%, 1%, 2%, 3%, 4%, 5%, 6%, 7%, 7.5%.
Said ooze is or/and the weight percent of silicon ash is 4 ~ 25%, for example 5%, 6%, 7%, 8%, 9%, 10%, 11%, 12%, 13%, 14%, 15%, 16%, 17%, 18%, 19%, 20%, 21%, 22%, 23%, 24%.
Preferably, said powder comprises by the weight percent of its each ingredients constitute aggregate and powder quality sum:
Alumina micro mist 0 ~ 8%
Ooze 4 ~ 25%.
Said alumina powder is or/and alumina micro mist weight percent is 0 ~ 8%, and wherein " 0 " is represented, said refractory materials does not contain alumina powder or/and the alumina micro mist.
Said alumina micro mist weight percent is 0 ~ 8%, wherein " 0 " expression, and said refractory materials does not contain the alumina micro mist.
As preferred version, be 100% in the quality sum of aggregate and powder, said admixture comprises:
Organic bond 4 ~ 8%;
Preferably, be 100% in the quality sum of aggregate and powder, said admixture comprises:
Organic bond 4 ~ 8%
Organic acid 0 ~ 1%
Water reducer 0 ~ 0.1%.
The weight percent of said organic bond is 4 ~ 8%, for example 4.5%, 5%, 5.5%, 6%, 6.5%, 7%, 7.5%.
Said organic acid weight percent is 0 ~ 1%, for example 0.1%, 0.2%, 0.3%, 0.4%, 0.5%, 0.6%, 0.7%, 0.8%, 0.9%.
The weight percent of said water reducer is 0 ~ 0.1%, for example 0.01%, 0.02%, 0.03%, 0.04%, 0.05%, 0.06%, 0.07%, 0.08%, 0.09%.
Said organic acid weight percent is 0 ~ 1%, wherein " 0 " expression, and said refractory materials does not contain organic acid.
Said water reducer weight percent is 0 ~ 0.1%, wherein " 0 " expression, and said refractory materials does not contain water reducer.
As optimal technical scheme, be 100% in the quality sum of aggregate and powder, said refractory materials comprises:
Said the weight percent of 0.088mm silit is 0 ~ 12%, and wherein " 0 " expression, said refractory materials does not contain < 0.088mm silit.
Said alumina micro mist weight percent is 0 ~ 8%, wherein " 0 " expression, and said refractory materials does not contain the alumina micro mist.
" comprising " of the present invention, mean it except that said component, can also comprise other components, these other components are given said refractory materials different characteristic.In addition, " comprising " of the present invention, can also replace with enclosed " being " or " by ... form ".No matter which kind of composition refractory materials according to the invention comprises, the weight percent sum of the aggregate of said refractory materials and powder is 100%.
Two of the object of the invention is to provide the preparation method of aforesaid refractory materials, and said method is: according to formula ratio, with carrying out mixing, compression moulding after each raw materials mix, after drying, calcine, obtain refractory materials.
Preferably, said calcining temperature is 1100 ~ 1500 ℃, for example 1150 ℃, 1200 ℃, 1250 ℃, 1300 ℃, 1350 ℃, 1400 ℃, 1450 ℃, preferred 1200 ~ 1450 ℃, and further preferred 1280 ~ 1380 ℃.1100 ℃ of calcining temperature end values according to the invention and 1500 ℃ equally can embodiment of the present invention, and the present invention no longer illustrates at this.
Refractory materials of the present invention has important use in cement rotary kiln; The branch that is mainly used in cement rotary kiln ungirds and the transitional zone cold junction; Simultaneously; Refractory materials according to the invention can also be used for high temperature kiln position easy to wear, like the wadding of cement kiln residual heat generating airflow line elbow, whirlwind cone body, tertiary air tube shut-off device.
Compared with prior art, the present invention has following beneficial effect:
The present invention is through adopting mullite or three grades of alumines or level Four alumine, silit, alumina powder or alumina micro mist, ooze or silicon ash and organic bond formulated; Alumina content is 30-60%; Not only price is lower, but also have good high temperature resistant, anti-erosion, heat-resisting shake, wear-resistant, low heat conductivity can, the branch that can be used for cement rotary kiln ungirds and the transitional zone cold junction; Alternative existing anti-peeling high aluminium brick and siliceous mullite brick; Satisfied the demand of cement kiln, reduced heat lost by radiation, improved the life-span of kiln and the needs of economic benefit the low heat conduction of refractory materials, alkali resistant erosion.
Embodiment
For the present invention is described better, be convenient to understand technical scheme of the present invention, typical case of the present invention but non-restrictive example is following:
Embodiment 1:
Raw material be middle aluminum-containing mullite, silit, the alumina content of alumina content 56% be 85% special grade bauxite micro mist, alumina content 30% ooze, to adopt the PVA aqueous solution of concentration 5% be wedding agent.The weight percent prescription is: aluminum-containing mullite 10% among aluminum-containing mullite 45%, the 1-0mm, 1-0mmSiC13% among the 3-1mm, < aluminum-containing mullite 21%, alumina micro mist 5%, ooze 6% among the 0.088mm, material design alumina content is 48.6%.Mix the PVA aqueous solution 5% outward, through cooperation, mixing, compacting, drying, burn till at 1420 ℃ * 8h, make refractory brick.Through test, volume density 2.40g/>cm<sup >3</sup>, apparent porosity 20%, compressive strength 60MPa, 1540 ℃ of refractorinesss under load, thermal shock resistance 20 times, 1 grade of alkali resistance.
Embodiment 2:
Raw material be low aluminum-containing mullite, silit, the alumina content of alumina content 47% be 80% one-level alumine micro mist, alumina content 30% ooze, to adopt concentration spent pulping liquor be wedding agent.The weight percent prescription is: 3-1mm low aluminum-containing mullite 35%, 1-0mm low aluminum-containing mullite 10%, 1-0mmSiC 10%, < 0.088mm low aluminum-containing mullite 20%, alumina micro mist 5%, ooze 20%, material design alumina content is 40.6%.With spent pulping liquor is wedding agent, through cooperation, mixing, compacting, drying, burn till at 1300 ℃ * 8h, make refractory brick.Through test, volume density 2.35g/>cm
3, apparent porosity 20%, compressive strength 60MPa, 1450 ℃ of refractorinesss under load, thermal shock resistance is greater than 30 times, 1 grade of alkali resistance.
Embodiment 3:
Raw material is that three grades of alumines, silit, 800 order special grade bauxite micro mists of alumina content 85%, the ooze of alumina content 30%, the employing lignosulfite of alumina content 55% is wedding agent.The weight percent prescription is: three grades of alumina 35% of 3-1mm, three grades of alumina 10% of 1-0mm, 1-0mmSiC10%, < three grades of alumina 20% of 0.088mm, < 0.088mmSIC 5%, alumina micro mist 5%, ooze 15%, material design alumina content is 44.5%.Mix spent pulping liquor 6% outward, through cooperation, mixing, compacting, drying, burn till at 1350 ℃ * 8h, make refractory brick.Through test, volume density 2.38g/>cm<sup >3</sup>, apparent porosity 19%, compressive strength 55MPa, 1400 ℃ of refractorinesss under load, thermal shock resistance 15 times, alkali resistance one-level.
Embodiment 4:
Raw material is that flint clay, silit, 800 order one-level alumine micro mists of alumina content 80%, the ooze of alumina content 30%, the employing lignosulfite of alumina content 45% is wedding agent.The weight percent prescription is: 3-1mm flint clay 35%, 1-0mm flint clay 15%, 1-0mmSiC 10%, < 0.088mm flint clay 20%, < 0.088mmSIC 5%, alumina micro mist 5%, ooze 25%, material design alumina content is 36.5%.Mix spent pulping liquor 6% outward, through cooperation, mixing, compacting, drying, burn till at 1300 ℃ * 8h, make refractory brick.Through test, volume density 2.38g/>cm
3, apparent porosity 19%, compressive strength 50MPa, 1400 ℃ of refractorinesss under load, thermal shock resistance 15 times, alkali resistance one-level.
Embodiment 5
Raw material be three grades of alumines, silit, the alumina content 30% of alumina content 55% ooze, to adopt concentration be that the aqueous solution of the Z 150PH of 2wt% is wedding agent.The weight percent prescription is: three grades of alumines 44% of 3-1mm, three grades of alumines 5% of 1-0mm, 1-0mmSiC 5%, < three grades of alumines 30% of 0.088mm, < 0.088mmSIC 12%, ooze 4%, material design alumina content is 30%.Mix polyvinyl alcohol water solution 4% outward, through cooperation, mixing, compacting, drying, burn till at 1100 ℃ * 8h, make refractory brick.Through test, volume density 2.39g/>cm<sup >3</sup>, apparent porosity 18%, compressive strength 53MPa, 1400 ℃ of refractorinesss under load, thermal shock resistance 15 times, alkali resistance one-level.
Embodiment 6
Raw material be 800 order one-level alumine micro mists, the alumina content 30% of low aluminum-containing mullite, silit, the alumina content 80% of alumina content 47% ooze, to adopt concentration be that the aqueous solution of Z 150PH of 10wt% is as wedding agent.The weight percent prescription is: 3-1mm low aluminum-containing mullite 38%, 1-0mm low aluminum-containing mullite 10%, 1-0mmSiC 15%, < 0.088mm low aluminum-containing mullite 5%, < 0.088mmSIC 6%, alumina micro mist 8%, ooze 18%, material design alumina content is 60%.Mix polyvinyl alcohol water solution 8% outward, through cooperation, mixing, compacting, drying, burn till at 1500 ℃ * 8h, make refractory brick.Through test, volume density 2.38g/>cm
3, apparent porosity 19%, compressive strength 50MPa, 1560 ℃ of refractorinesss under load, thermal shock resistance 15 times, alkali resistance one-level.
Embodiment 7
Raw material is that three grades of alumines, silit, 800 order special grade bauxite micro mists of alumina content 85%, the ooze of alumina content 30%, the aqueous solution that concentration is the 0.5wt% CMC 99.5 of alumina content 55% are wedding agent.The weight percent prescription is: three grades of alumines 35% of 3-1mm, three grades of alumines 10% of 1-0mm, 1-0mmSiC 10%, < three grades of alumines 20% of 0.088mm, < 0.088mmSIC 5%, alumina micro mist 5%, ooze 15%, material design alumina content is 44.5%.Mix the aqueous solution 6%, tartrate 1%, the tripoly phosphate sodium STPP 0.1% of CMC 99.5 outward, through cooperation, mixing, compacting, drying, burn till at 1350 ℃ * 8h, make refractory brick.Through test, volume density 2.38g/>cm<sup >3</sup>, apparent porosity 19%, compressive strength 55MPa, 1480 ℃ of refractorinesss under load, thermal shock resistance 15 times, alkali resistance one-level.
Embodiment 8
Raw material be 800 order one-level alumine micro mists, the alumina content 30% of low aluminum-containing mullite, silit, the alumina content 80% of alumina content 47% ooze, to adopt the aqueous solution of the inferior CMC 99.5 of 5wt% be wedding agent.The weight percent prescription is: 3-1mm low aluminum-containing mullite 30%, 1-0mm low aluminum-containing mullite 10%, 1-0mmSiC 15%, < 0.088mm low aluminum-containing mullite 13%, < 0.088mmSIC 6%, alumina micro mist 8%, ooze 18%, material design alumina content is 60%.Mix the aqueous solution 8%, Hydrocerol A 0.5%, the ZX-I 0.05% of inferior CMC 99.5 outward, through cooperation, mixing, compacting, drying, burn till at 1380 ℃ * 8h, make refractory brick.Through test, volume density 2.38g/>cm
3, apparent porosity 19%, compressive strength 50MPa, 1480 ℃ of refractorinesss under load, thermal shock resistance 15 times, alkali resistance one-level.
Compare with siliceous mullite brick, products made thereby of the present invention has better heat-shock resistance and alkali resistance; Compare with alkaline-resisting brick, products made thereby of the present invention has better high temperature resistant, thermal shock resistance.So far, research has reached purpose fully.
Should be noted that and understand, under the situation that does not break away from the desired the spirit and scope of the present invention of accompanying Claim, can make various modifications and improvement the present invention of above-mentioned detailed description.Therefore, the scope of the technical scheme of requirement protection does not receive the restriction of given any specific exemplary teachings.
Applicant's statement, the present invention explains detailed method of the present invention through the foregoing description, but the present invention is not limited to above-mentioned detailed method, does not mean that promptly the present invention must rely on above-mentioned detailed method and could implement.The person of ordinary skill in the field should understand, and to any improvement of the present invention, to the interpolation of the equivalence replacement of each raw material of product of the present invention and ancillary component, the selection of concrete mode etc., all drops within protection scope of the present invention and the open scope.
Claims (10)
1. a sintered aluminium siliceous refractory [material comprises aggregate, powder and admixture, it is characterized in that, said aggregate comprises the mixture and the silit of a kind of in mullite, alumina and the flint clay or at least two kinds; Said powder comprises ooze; Admixture comprises organic bond.
2. refractory materials as claimed in claim 1 is characterized in that, the alumina content of said refractory materials is 30 ~ 60wt%, preferred 35 ~ 60wt%, further preferred 40 ~ 60wt%;
Preferably, said mullite is that middle aluminum-containing mullite is or/and low aluminum-containing mullite;
Preferably, said mullite is that granularity is 3-1mm, the 1-0mm, < mixture of a kind of in the mullite of 0.088mm or at least two kinds;
Preferably, said alumina is an alumine, and preferred three grades of alumines are or/and the level Four alumine;
Preferably, said alumina is that granularity is 3-1mm, the 1-0mm, < mixture of a kind of in the alumina of 0.088mm or at least two kinds;
Preferably, said flint clay is that granularity is 3-1mm, the 1-0mm, < mixture of the flint clay of 0.088mm a kind of or at least two kinds;
Preferably, the granularity of said silit is that 1-0mm is or/and < 0.088mm.
3. according to claim 1 or claim 2 refractory materials is characterized in that said powder also comprises the alumina micro mist, and preferred said powder also comprises alumina powder or/and silicon is grey;
Preferably, said alumina micro mist is that the special grade bauxite micro mist is or/and one-level alumine micro mist.
4. like the described refractory materials of one of claim 1-3, it is characterized in that said organic bond is selected from a kind of or at least two kinds mixture in the aqueous solution of the aqueous solution, CMC 99.5 of lignosulfite, Z 150PH;
Preferably, the solubility of the aqueous solution of Z 150PH is 2 ~ 10wt%, preferred 2.5 ~ 9wt%, further preferred 3 ~ 8wt%;
Preferably, the concentration of the aqueous solution of said CMC 99.5 is 0.5 ~ 5wt%, preferred 1 ~ 4wt%, further preferred 1 ~ 3wt%;
Preferably, admixture also comprises organic acid or/and water reducer;
Preferably, said organic acid is selected from the mixture of a kind of in tartrate, Hydrocerol A, oxalic acid, the maleic acid or at least two kinds, the mixture of a kind of in preferred tartrate, Hydrocerol A, the oxalic acid or at least two kinds;
Preferably, said water reducer is selected from the mixture of a kind of in third generation cement water reducing agent, s-generation cement water reducing agent, ZX-I, ROHM, tripoly phosphate sodium STPP, the Sodium hexametaphosphate 99 or at least two kinds.
5. like the described refractory materials of one of claim 1-4, it is characterized in that said aggregate comprises by the weight percent of its each ingredients constitute aggregate and powder quality sum:
6. like the described refractory materials of one of claim 1-5, it is characterized in that said powder comprises by the weight percent of its each ingredients constitute aggregate and powder quality sum:
Alumina powder is or/and alumina micro mist 0 ~ 8%
Ooze is or/and silicon ash 4 ~ 25%;
Preferably, said powder comprises by the weight percent of its each ingredients constitute aggregate and powder quality sum:
Alumina micro mist 0 ~ 8%
Ooze 4 ~ 25%.
7. like the described refractory materials of one of claim 1-6, it is characterized in that, is 100% in the quality sum of aggregate and powder, and said admixture comprises:
Organic bond 4 ~ 8%;
Preferably, be 100% in the quality sum of aggregate and powder, said admixture comprises:
Organic bond 4 ~ 8%
Organic acid 0 ~ 1%
Water reducer 0 ~ 0.1%.
8. like the described refractory materials of one of claim 1-7, it is characterized in that, is 100% in the quality sum of aggregate and powder, and said refractory materials comprises:
9. the preparation method like one of claim 1-8 described refractory materials is characterized in that, said method is:
According to formula ratio, with carrying out mixing, compression moulding after each raw materials mix, after drying, calcine, obtain refractory materials;
Preferably, said calcining temperature is 1100 ~ 1500 ℃, preferred 1200 ~ 1450 ℃, and further preferred 1280 ~ 1380 ℃.
10. one kind like the purposes of the described refractory materials of one of claim 1-8 in cement rotary kiln.
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