CN102491773B - High-crystal mullite-iolite high-temperature industrial ceramic and production method for same - Google Patents

High-crystal mullite-iolite high-temperature industrial ceramic and production method for same Download PDF

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CN102491773B
CN102491773B CN 201110422262 CN201110422262A CN102491773B CN 102491773 B CN102491773 B CN 102491773B CN 201110422262 CN201110422262 CN 201110422262 CN 201110422262 A CN201110422262 A CN 201110422262A CN 102491773 B CN102491773 B CN 102491773B
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temperature
accounts
fire
conjunction
powder
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CN102491773A (en
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陈皇忠
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广东热金宝新材料科技有限公司
广东热金宝特种耐火材料实业有限公司
陈皇忠
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    • C04B35/16Shaped 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 silicates other than clay
    • C04B35/18Shaped 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 silicates other than clay rich in aluminium oxide
    • C04B35/195Alkaline earth aluminosilicates, e.g. cordierite or anorthite
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Abstract

The invention relates to a high-crystal mullite-iolite high-temperature industrial ceramic and a production method for the same. Raw materials comprise, by weight, 40-80 parts of main crystal phase materials, 20-60 parts of combined composite substrate materials and an appropriate amount of composite microcrystal nucleating agent. A roasting process of the production method includes a two-stage constant-temperature roasting method and a two-stage composite crystallization synthetic reaction characteristic enhancing process, wherein the two-stage constant-temperature roasting method includes the steps of performing constant-temperature heat preservation for 10-15 hours at the temperature of 200 DEG C, and performing constant-temperature heat preservation for 10-15 hours at the temperature of 500 DEG C; and the two-stage composite crystallization synthetic reaction characteristic enhancing process includes the steps of sintering for 10-15 hours under the ordinary pressure and at the temperature ranging from 1100 DEG C to 1150 DEG C, and sintering for 20-25 hours under the ordinary pressure and at the temperature ranging from 1420 DEG C to 1430 DEG C. A refractory product produced by the method has the advantages of excellent oxidation resistance, high refractoriness, high usage temperature, low thermal expansion coefficient, high compression strength, hypobarism, excellent heat stability, anti-strip performance and high high-temperature bending strength. The process of the method has the advantages of simple process, low cost and suitability for mass production, and is applicable to preparing kiln furniture, industrial ceramics and structural materials.

Description

High crystal mullite-cordierite matter hot industry pottery and production method thereof
Technical field
The invention belongs to hot industry ceramics processing field, specifically, relate to a kind of high crystal mullite-cordierite matter hot industry pottery---the production technology of fire-resistant kiln furnitures, structural ceramics, structured material.
Background technology
In recent years, global economy develops to integrated direction, China's rapid economic development, living standards of the people improve constantly, requirement to the kind of ceramic-like product and quality is more and more higher, has promoted the flourish of industries such as domestic electronics, magneticsubstance, pottery, building materials, new forms of energy, devitrified glass.Along with the research and development success of new material pottery and the update of ceramic-like product, manufacturer is at the sintering process of product, producing the equipment aspect also constantly improves, to the hot industry pottery, fire-resistant kiln furnitures, the furnace kiln structure material is had higher requirement, traditional clay matter, high alumina matter, tektite diamond stone matter, silicon-carborundum matter and the fire-resistant kiln furnitures of common cordierite and kiln refractory product can't satisfy service requirements, and the exploitation adaptation is high-quality is burnt till the high anti-oxidation of usefulness by the burning product, antistripping, the refractoriness height, the use temperature height, thermal expansivity is low, intensity is good, weight is low, high crystal mullite-cordierite matter hot industry pottery---the fire-resistant kiln furnitures than the long life of excellent heat stability, structural ceramics, structured material has become a kind of development trend.High crystal mullite-cordierite matter hot industry pottery---fire-resistant kiln furnitures, structural ceramics, structured material has antistripping, the refractoriness height, the use temperature height, thermal expansivity is low, good thermal shock stability, high strength, anti-oxidant, advantages such as long service life, and can adopt compacting, extrude, cast, roll extrusion, multiple molding mode such as ramming is made the product of different shape, except the various special-shaped kiln furnitures that the making every profession and trade needs, (as: brick is enclosed on kiln car hollow limit can also to make structured material for the every profession and trade stove, the hollow suspender member of Yao Ding and kiln wall), can reduce significantly after the use and be burnt the product fuel consumption, simultaneously can avoid dirty defective, improved quality product, be the high crystal mullite-cordierite matter hot industry potteries of research and development, comprise fire-resistant kiln furnitures, structural ceramics, the first-selected project of structured material.
At present, domestic have minority scientific research institution and producer that high crystal mullite-cordierite matter hot industry pottery " fire-resistant kiln furnitures, structural ceramics, structured material " production technology is classified as main research project and developed, but because aspects such as formula for a product, raw materials quality, working condition, production technique, quality control exist deficiency, still rest on experimental stage, fail to find the high crystal mullite-cordierite of Key Implementation scale operation matter hot industry pottery, comprise the breach of fire-resistant kiln furnitures, structural ceramics, structured material.
Summary of the invention
The objective of the invention is at the problems referred to above, provide a kind of high anti-oxidation, antistripping, refractoriness height, use temperature height, thermal expansivity is low, intensity good, weight is low, the high crystal mullite-cordierite matter hot industry pottery than the long life of excellent heat stability---fire-resistant kiln furnitures, structural ceramics, structured material and technology thereof are simple, cost is low, be fit to the production method of scale operation.
Know-why of the present invention: during refractory product is produced, composition of raw materials will determine material, wood property, and very big to the Technology problems affect that may occur in the enforcement of pilot scale, scale operation; The control matrix phase generates the formation of low-melting glassy phase, make the matrix phase major part or be converted into the crystallite phase fully, improving the amount of crystals of mullite, trichroite in the goods, then is the key that improves goods high temperature break resistant intensity, thermal expansivity, thermal shock resistance and antistrip performance.Based on this, the present invention starts with from improving composition of raw materials, product forming technique and sinter process, in conjunction with MgO-Al 2O 3-SiO 2Be the factors such as physical and chemical performance, production cost, technology practicality and novelty of equilibrium phase diagram, raw material type and source, expection resultant, through repetition test, main way of the present invention is:
1, according to property of raw material and MgO-Al 2O 3-SiO 2Be the selected basic material of equilibrium phase diagram: trichroite (2MgO2Al 2O 35SiO 2) be about 1470 ℃ of crystalline phase fusing point, its thermal expansivity low (under RT-1000 ℃ of condition, α=1.1-2.6 * 10 -6/ ℃); Mullite synthesizing (3Al 2O 32SiO 2), the fusing point height, thermal expansivity is moderate; Mullite synthesizing, its mullite interleaving network structure excellence of calcined kaolin, and do not contain free quartzy phase.Sillimanite, andaluzite (AL 2O 3SiO 2) have high purity, energy-conservation, need not calcine before using, easily to characteristics such as mullite conversions.Form main crystal phase material so choose with calcined kaolin, trichroite, mullite synthesizing, sillimanite, andaluzite, and test exploration on this basis repeatedly, seek the optimization of composition of raw materials and the improvement of production technique;
2, determine raw material type and proportioning: mullite, trichroite raw material all need synthetic in the few primary high purity of occurring in nature, and raw materials used difference when synthetic has larger difference at mineralogical character.Through comparing repeatedly, adopt fused mullite, the trichroite synthesis material is the basic material of hot industry pottery of the present invention, and with natural matter combination mullite and trichroite matrix phase, determined that simultaneously 40-70% forms main crystal phase material with calcined kaolin, trichroite, mullite synthesizing, sillimanite, andaluzite, is equipped with the ratio range in conjunction with the composite interstitial substance material of 30-60%;
3, clear and definite firing range and sintering curve: firing range and sintering curve are key problem in technology, adopt optimum seeking method to carry out repetition test, to firing temperature, sintering curve, add crystallite nucleation dosage, the mutual relationship of the mineral facies composition of goods and performance index etc. is carried out a large amount of tests and comprehensive comparative analysis, seek relation and technical basis between them, finally finding the special upright intensive treatment optimum temperature range of the compound crystallization building-up reactions of matrix phase is 1420 ℃-1430 ℃, select crystallite nucleator kind and quantity and devitrification temperature scope simultaneously, crystallite nucleator kind is selected the compound crystallite nucleator of ZrO2+V2O5, ZrO for use 2Generally select Zirconium dioxide powder, zircon sand, zirconium Ying Fen etc. for use;
4, improve moulding process: aspect production technique, except considering temperature, raw material composition, grain composition, crystallite nucleation dosage, mineral facies composition, performance index, produce molding mode according to difference and work out different moulding process routes.Quality problems such as excessive load-carrying, distortion, planeness, fine crack are improved rapidly, and form stable raw material and prescription, batch mixing, bundle material, moulding, drying, burn till, a series of technical matters systems such as finished product detection, established the Technology basis of scale operation.
The present invention, described high crystal mullite-cordierite matter hot industry pottery, comprise fire-resistant kiln furnitures, structural ceramics and structured material, proportioning raw materials comprise the main crystal phase material of 40-80 weight part and 20-60 weight part in conjunction with the composite interstitial substance material, selected main crystal phase material, reach 100 weight parts in conjunction with total component of composite interstitial substance material, add an amount of compound crystallite nucleator again, wherein:
1), main crystal phase material is calcined kaolin, trichroite, mullite synthesizing, sillimanite, andaluzite aggregate, wherein, the calcined kaolin aggregate accounts for main crystal phase material 20-50wt%, the trichroite aggregate accounts for the 5-20wt% of main crystal phase material, the Mo Laikate aggregate accounts for the 30-60wt% of main crystal phase material, andaluzite or sillimanite aggregate account for the 1-10wt% of main crystal phase material, and the particle diameter of above-mentioned aggregate is less than 0.71mm;
2), in conjunction with the composite interstitial substance material be:
Contain the magnesium oxide finely-powdered minerals: the MgO component content is greater than 32%, and fineness requirement is by 325 orders, and the magnesium oxide finely-powdered minerals accounts for the 25-35wt% in conjunction with the composite interstitial substance material;
Aluminium oxide powder: Al 2O 3Component content is greater than 99.9%, and particle diameter is less than 5 μ m, and aluminium oxide powder accounts for the 25-40wt% in conjunction with the composite interstitial substance material;
Fine silica powder: SiO 2Component content is greater than 99%, and particle diameter is less than 1 μ m, and fine silica powder accounts for the 2-10wt% in conjunction with the composite interstitial substance material;
Kaolin: Al 2O 3Component content is greater than 36%, Fe 2O 3Component content is less than 0.8%, and fineness requirement is by 325 orders, and kaolin accounts for the 10-25wt% in conjunction with the composite interstitial substance material;
Ball clay: Al 2O 3Component content is greater than 35%, Fe 2O 3Component content is less than 1%, and fineness requirement is by 325 orders, and ball clay accounts for the 25-40wt% in conjunction with the composite interstitial substance material;
That adjusts that composition uses contains MgO, Al by what contain that magnesium oxide finely-powdered minerals, kaolin, fine silica powder, activated alumina micro mist, corundum powder obtain 2O 3, SiO 2The fire-resistant powder fineness requirement that the fire-resistant powder of composition, described adjustment composition are used is by 500 orders, and the fire-resistant powder that described adjustment composition is used accounts for the 0-15wt% in conjunction with the composite interstitial substance material; In the fire-resistant powder that described adjustment composition is used, the MgO composition accounts for the 25-40wt% of the total component of fire-resistant powder that described adjustment composition uses, Al 2O 3Composition accounts for the 35-45wt% of the total component of fire-resistant powder that described adjustment composition uses, SiO 2Composition accounts for the 15-30wt% of the total component of fire-resistant powder that described adjustment composition uses;
3) the crystallite nucleator is ZrO 2+ V 2O 5Compound crystallite nucleator, ZrO 2With V 2O 5Weight ratio be 2-3:3-4, fineness requirement is by 500 orders, compound crystallite nucleator is above-mentioned selected main crystal phase material and in conjunction with the 1.0-10wt% of the total amount of composite interstitial substance material;
The present invention, described production method comprises batching, batch mixing, bundle material, moulding, drying and burns till.In sintering process, comprise two sections constant temperature sintering methods and two sections special upright strengthening treatment process of compound crystallization building-up reactions, wherein:
Two sections constant temperature sintering methods are: in the time of 200 ℃, and constant temperature insulation 10-15 hour; In the time of 500 ℃, constant temperature insulation 10-15 hour;
Two sections special upright strengthening treatment process of compound crystallization building-up reactions are: be warming up to first section high temperature constant temperature, and first section high temperature constant temperature 1100-1150 ℃ temperature, under the normal pressure sintering 10-15 hour; Be warming up to second section high temperature constant temperature again, second section high temperature constant temperature 1420-1430 ℃ temperature, under the normal pressure sintering 20-25 hour.
The present invention compared with prior art, its beneficial effect and innovative point are mainly reflected in:
1, proportioning raw materials is main crystal phase material with calcined kaolin, trichroite, mullite synthesizing, sillimanite, the andaluzite of 40-80%, be equipped with 20-60% in conjunction with the composite interstitial substance material, add compound nucleus agent (ZrO simultaneously 2+ V 2O 5) catalysis enhancing matrix height micritization, special upright zirconium mullite high temperature phase, the high viscosity matrix phase generates, and has greatly overcome low temperature matrix amount of liquid phase (5-10%), improves thereby promoted high-temperature behavior comprehensively, is able to successful Application;
2, the key of sintering process is at 1420 ℃ of-1430 ℃ of high temperature goods to be carried out micritization nucleation intensive treatment, generates low-melting glassy phase by the control matrix phase, and further makes the most of matrix phase or be converted into microcrystal fully; Goods are high crystalline structure after intensive treatment, antioxidant property excellence, refractoriness height, use temperature height, thermal expansivity is low, ultimate compression strength is high, proportion is low, excellent heat stability, antistrip performance, high temperature break resistant intensity height;
3, technological core is the sintering curve of micritization nucleation intensive treatment (carrying out between 1420 ℃-1430 ℃), being divided into sinter process low temperature divides two sections constant temperature to handle, the special upright intensive treatment of two sections compound crystallization building-up reactionss of high temperature, goods nucleus in sintering process is formed early, the nucleus skeleton increases, and shrinking percentage reduces, and after the further crystallization, the amount of crystals of mullite, trichroite increases greatly in the goods, makes crystalline structure form the interleaving network structure.The high crystal mullite-cordierite matter hot industry pottery " fire-resistant kiln furnitures, structural ceramics, structured material " of exploitation has high temperature resistant (flame temperature>1600 ℃), (>1450 ℃ of load softening point height, T0.6), high temperature break resistant intensity height (17Mpa) in the time of 1250 ℃, the 25-1000 ℃ of coefficient of expansion 3.0 (10 -6K -1), thermal shock resistance excellence, high temperature break resistant intensity height, antistrip performance, work simplification, reliable, characteristics such as cost is low, high-strength light, energy-conserving and environment-protective;
4, moulding process adopt suppress, extrudes, moulding processs such as cast, roll extrusion, ramming produce high crystal mullite-cordierite matter hot industry pottery " fire-resistant kiln furnitures, structural ceramics, structured material ", technology is simple, cost is low, suitable scale operation.
Goods of the present invention, have high crystalline structure, antioxidant property excellence, refractoriness height, use temperature height, thermal expansivity is low, ultimate compression strength is high, proportion is low, the advantage of excellent heat stability, antistrip performance, high temperature break resistant intensity height, long service life; Technology of the present invention has the advantage that technology is simple, cost is low, be fit to scale operation, is applicable to fire-resistant kiln furnitures, structural ceramics, structured material preparation.
Description of drawings
Fig. 1 is the main technical details of embodiment goods.
Embodiment
A kind of high crystal mullite-cordierite matter hot industry pottery, comprise fire-resistant kiln furnitures, structural ceramics and structured material, the raw material of preparation comprise the main crystal phase material of 40-80 weight part and 20-60 weight part in conjunction with the composite interstitial substance material, selected main crystal phase material and reach 100 weight parts in conjunction with total component of composite interstitial substance material, add an amount of compound crystallite nucleator again, wherein:
1) main crystal phase material is calcined kaolin, trichroite, mullite synthesizing, sillimanite, andaluzite aggregate, wherein, the calcined kaolin aggregate accounts for main crystal phase material 20-50wt%, the trichroite aggregate accounts for the 5-20wt% of main crystal phase material, the mullite synthesizing aggregate accounts for the 30-60wt% of main crystal phase material, andaluzite or sillimanite aggregate account for the 1-10wt% of main crystal phase material, and the particle diameter of above-mentioned aggregate is less than 0.71mm;
2) in conjunction with the composite interstitial substance material be:
Contain the magnesium oxide finely-powdered minerals: the MgO component content is greater than 32%, and fineness requirement is by 325 orders, and the magnesium oxide finely-powdered minerals accounts for the 25-35wt% in conjunction with the composite interstitial substance material;
Aluminium oxide powder: Al 2O 3Component content is greater than 99.9%, and particle diameter is less than 5 μ m, and aluminium oxide powder accounts for the 25-40wt% in conjunction with the composite interstitial substance material;
Fine silica powder: SiO 2Component content is greater than 99%, and particle diameter is less than 1 μ m, and fine silica powder accounts for the 2-10wt% in conjunction with the composite interstitial substance material;
Kaolin: Al 2O 3Component content is greater than 36%, Fe 2O 3Component content is less than 0.8%, and fineness requirement is by 325 orders, and kaolin accounts for the 10-25wt% in conjunction with the composite interstitial substance material;
Ball clay: Al 2O 3Component content is greater than 35%, Fe 2O 3Component content is less than 1%, and fineness requirement is by 325 orders, and ball clay accounts for the 25-40wt% in conjunction with the composite interstitial substance material;
That adjusts that composition uses contains MgO, Al by what contain that magnesium oxide finely-powdered minerals, kaolin, fine silica powder, activated alumina micro mist, corundum powder obtain 2O 3, SiO 2The fire-resistant powder fineness requirement that the fire-resistant powder of composition, described adjustment composition are used is by 500 orders, and the fire-resistant powder that described adjustment composition is used accounts for the 0-15wt% in conjunction with the composite interstitial substance material; In the fire-resistant powder that described adjustment composition is used, the MgO composition accounts for the 25-40wt% of the total component of fire-resistant powder that described adjustment composition uses, Al 2O 3Composition accounts for the 35-45wt% of the total component of fire-resistant powder that described adjustment composition uses, SiO 2Composition accounts for the 15-30wt% of the total component of fire-resistant powder that described adjustment composition uses;
3) the crystallite nucleator is ZrO 2+ V 2O 5Compound crystallite nucleator, ZrO 2With V 2O 5Weight ratio be 2.5:3.5, fineness requirement is by 500 orders, compound crystallite nucleator is above-mentioned selected main crystal phase material and in conjunction with the 4.2wt% of the total mass of composite interstitial substance material;
Above-mentioned raw materials burns till and is finished product after batch mixing, bundle material, moulding, drying.In sintering process, comprise two sections constant temperature sintering methods and two sections special upright strengthening treatment process of compound crystallization building-up reactions, wherein:
Two sections constant temperature sintering methods are: in the time of 200 ℃, and constant temperature insulation 10-15 hour; In the time of 500 ℃, constant temperature insulation 10-15 hour;
Two sections special upright strengthening treatment process of compound crystallization building-up reactions are: be warming up to first section high temperature constant temperature, and first section high temperature constant temperature 1100-1150 ℃ temperature, under the normal pressure sintering 10-15 hour; Be warming up to second section high temperature constant temperature again, second section high temperature constant temperature 1420-1430 ℃ temperature, under the normal pressure sintering 20-25 hour.
The main technical details of the described product of present embodiment is asked for an interview Fig. 1.
Main products of the present invention comprises fire-resistant kiln furnitures, hot industry pottery, furnace kiln structure material; As refractory slab, hollow sheeting and stove furred ceiling, Yao Qiang, the kiln car hollow structure material of kiln furnitures class, its principal feature is that antistrip performance, high temperature break resistant intensity and thermal shock resistance can be excellent, and economy and practicality are unified.The purposes of product is as follows:
1., refractory slab: be mainly used in fine porcelain, household china, bone china, half porcelain, fine pottery, boccaro, marmite pot, light china, colored glaze mosaic, paving tile, sanitary ware (small-sized), devitrified glass (small-sized crystallization processing), artistic decoration glass product burning till at tunnel furnace, roller kiln and shuttle kiln such as (surface shape processing);
2., hollow sheeting: be mainly used in burning till of goods such as sanitary ware and crystallizing glass decoration board, sun power crucible, domestic ceramics.Hollow sheeting is applicable to burning till fast of ceramic utensil product, has that the weight ratio solid slab alleviates half and energy-conservation, plate face supporting power increases, an advantage of flexible type, longer service life not under the high temperature;
3., stove furred ceiling, Yao Qiang, kiln car hollow structure material: product mainly substitutes tradition and burns till the refractory brick that stove is built block usefulness, and thoroughly change the theory of traditional stove design and use the material method, principal feature is can prevent slag effectively, peel off the product quality problem that burnt that causes, and obvious energy conservation, easy construction, raising stove class.
Main production equipments of the present invention comprises: pulverizing mill, biaxial rneader, vacuum deairing machine, true powder pump, disk screen formula feeding machine, three vacuum-extruders, automatically blank cutter, high temperature shuttle kiln, strike off thicknessing machine, polishing edging line and chamfering, 5T ball mill, 1500T mouldenpress, dust removal installation, test set, distribution facility, drying cart, cold working cutting mechanics, pressure filter, ram pump, 10T deposits pulp grinder etc. at a slow speed, described equipment all has sale on market.Compacting in the production technique, extrude, production technique such as cast, roll extrusion, ramming are existing ceramic molding.

Claims (1)

1. one kind high crystal mullite-cordierite matter hot industry pottery, comprise fire-resistant kiln furnitures and structural ceramics, the raw material of preparation comprise the main crystal phase material of 40-80 weight part and 20-60 weight part in conjunction with the composite interstitial substance material, selected main crystal phase material and reach 100 weight parts in conjunction with total component of composite interstitial substance material, add an amount of compound crystallite nucleator again, wherein:
1) main crystal phase material is calcined kaolin, trichroite, mullite synthesizing, sillimanite, andaluzite aggregate, wherein, the calcined kaolin aggregate accounts for main crystal phase material 20-50wt%, the trichroite aggregate accounts for the 5-20wt% of main crystal phase material, the mullite synthesizing aggregate accounts for the 30-60wt% of main crystal phase material, andaluzite or sillimanite aggregate account for the 1-10wt% of main crystal phase material, and the particle diameter of above-mentioned aggregate is less than 0.71mm;
2) in conjunction with the composite interstitial substance material be:
Contain the magnesium oxide finely-powdered minerals: the MgO component content is greater than 32%, and fineness requirement is by 325 orders, and the magnesium oxide finely-powdered minerals accounts for the 25-35wt% in conjunction with the composite interstitial substance material;
Aluminium oxide powder: Al 2O 3Component content is greater than 99.9%, and particle diameter is less than 5 μ m, and aluminium oxide powder accounts for the 25-40wt% in conjunction with the composite interstitial substance material;
Fine silica powder: SiO 2Component content is greater than 99%, and particle diameter is less than 1 μ m, and fine silica powder accounts for the 2-10wt% in conjunction with the composite interstitial substance material;
Kaolin: Al 2O 3Component content is greater than 36%, Fe 2O 3Component content is less than 0.8%, and fineness requirement is by 325 orders, and kaolin accounts for the 10-25wt% in conjunction with the composite interstitial substance material;
Ball clay: Al 2O 3Component content is greater than 35%, Fe 2O 3Component content is less than 1%, and fineness requirement is by 325 orders, and ball clay accounts for the 25-40wt% in conjunction with the composite interstitial substance material;
That adjusts that composition uses contains MgO, Al by what contain that magnesium oxide finely-powdered minerals, kaolin, fine silica powder, activated alumina micro mist, corundum powder obtain 2O 3, SiO 2The fire-resistant powder fineness requirement that the fire-resistant powder of composition, described adjustment composition are used is by 500 orders, and the fire-resistant powder that described adjustment composition is used accounts for the 0-15wt% in conjunction with the composite interstitial substance material; In the fire-resistant powder that described adjustment composition is used, the MgO composition accounts for the 25-40wt% of the total component of fire-resistant powder that described adjustment composition uses, Al 2O 3Composition accounts for the 35-45wt% of the total component of fire-resistant powder that described adjustment composition uses, SiO 2Composition accounts for the 15-30wt% of the total component of fire-resistant powder that described adjustment composition uses;
It is described that to contain the fire-resistant powder sum that magnesium oxide finely-powdered minerals, aluminium oxide powder, fine silica powder, kaolin, ball clay and adjustment composition use be 100wt%;
3) the crystallite nucleator is ZrO 2+ V 2O 5Compound crystallite nucleator, ZrO 2With V 2O 5Weight ratio be 2.5:3.5, fineness requirement is by 500 orders, compound crystallite nucleator is above-mentioned selected main crystal phase material and in conjunction with the 4.2wt% of the total mass of composite interstitial substance material;
Above-mentioned raw materials burns till and is finished product after batch mixing, ageing mixture, moulding, drying, in sintering process, comprises two sections constant temperature sintering methods and two sections special upright strengthening treatment process of compound crystallization building-up reactions, wherein:
Two sections constant temperature sintering methods are: in the time of 200 ℃, and constant temperature insulation 10-15 hour; In the time of 500 ℃, constant temperature insulation 10-15 hour;
Two sections special upright strengthening treatment process of compound crystallization building-up reactions are: be warming up to first section high temperature constant temperature, and first section high temperature constant temperature 1100-1150 ℃ temperature, under the normal pressure sintering 10-15 hour; Be warming up to second section high temperature constant temperature again, second section high temperature constant temperature 1420-1430 ℃ temperature, under the normal pressure sintering 20-25 hour.
CN 201110422262 2011-12-15 2011-12-15 High-crystal mullite-iolite high-temperature industrial ceramic and production method for same CN102491773B (en)

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CN105272188B (en) * 2015-10-09 2017-10-27 广东热金宝新材料科技有限公司 A kind of preparation method of the low aluminum-containing mullite of high crystal needle-like pilotaxitic texture
CN105272317A (en) * 2015-11-19 2016-01-27 长兴县新宏信耐火材料有限公司 Preparation method of andalusite and mullite composite brick
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