CN106396696B - The preparation method of mullite spherical shape aggregate enhancing refractory material - Google Patents
The preparation method of mullite spherical shape aggregate enhancing refractory material Download PDFInfo
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- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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Abstract
The invention discloses the preparation methods of mullite spherical shape aggregate enhancing refractory material.Using the haydite sand waste of mullite, as spherical aggregate, and spherical haydite sand semi-finished product that different size levels are matched are added as matrix in this method, using without press, from filling molding, be burnt into high temperature kiln.The present invention is had high fluidity, is conducive to tightly packed and aggregate distributing homogeneity using spherical useless aggregate of the ceramsite sand as refractory material, the spherical shape aggregate, reinforces improving the service performance of refractory material by aggregate；The present invention improves the ratio of spherical raw material using spherical haydite sand semi-finished product matrix, removes conventional powdery matrix, and spherical aggregate is made to fill, contact with sphere matrix, complete without press, from filling molding.The refractory material is applicable in the demanding field such as mobility, transporting, air-tightness and thermal insulation.
Description
Technical field
The invention belongs to technical field of refractory materials, and in particular to the preparation side of mullite spherical shape aggregate enhancing refractory material
Method.
Background technique
Refractory material is that a kind of guarantee hot industry operates normally or even hot industry makes the enabled of certain technological progresses
Material, so that such as steel, cement, non-ferrous metal, glass, ceramics and various mechanical, chemical products manufactures and be processed into can
Energy.Conventional refractory materials preparation process are as follows: mix aggregate (irregular particle) and base starting material (fine powder), then using not
Same moulding process is prepared as qualitative refractory material or uses directly as castable.For a long time, capabilities of refractory materials changes
Kind and innovation is more set about in terms of matrix.The interaction of the characteristic, aggregate and matrix of aggregate itself, largely shadow
The overall performance of refractory material is rung, it is ignored.Traditional aggregate is the preparation method comprises the following steps: required raw material is directly fired, is broken
And screening, the clinker of bulk is obtained by broken and classification.The aggregate of this method preparation is in irregular shape, each granularity model
Size distribution in enclosing is difficult to control.Meanwhile the clinker formed after specific crystal formation structure is crushed by various equipment, to its aggregate
Shape, performance has an impact.
With the development of technology, there is alumina hollow ball refractory material, fire proofed wood in high temperature, field of heat insulating materials
Material is hollow, spherical aggregate, with excellent performance.Spherical aggregate is directed to advantage of the irregular aggregate in refractory material
Also just all the more obvious.But spherical solid aggregate processing is technology hardly possible for the manufacturer for preparing irregular aggregate in the past
Topic.
Ceramsite sand is a kind of artificial synthesized spherical ceramic product, the natural gas or stone being primarily used between mining rock stratum
Oil.Use environment has sphericity, resistance to acid and alkali, bulk density, compression strength, grain composition etc. all to require to it.Product root
High-density high-strength (apparent density > 3.0g/cm can be substantially divided into according to its apparent density3), middle density high-strength (apparent density 2.8-3.0g/
cm3), low-density high-strength (apparent density 2.6-2.8g/cm3) and ultralow density high-strength ceramsite sand (apparent density < 2.6g/cm3).For gas production
Or that recovers the oil uses producer, according to the experiment and application experience of its many years, in order to expand the water conservancy diversion of ceramsite sand in use
Rate, it is desirable that the size of product is based on 20-40 mesh, 30-50 mesh, 40-70 mesh and 70-140 mesh.Manufacturer as ceramsite sand
It then requires the product mesh number fired to concentrate in defined section while meeting other indexs, basic technology is ingredient, ball milling, system
Powder, rolling balling-up, sieving, firing and sieving.During entirely preparing ceramsite sand, the mesh number product on sieve and under sieve can only
It is stacked as waste material, as the performance of waste material with product is, only size is undesirable, and final waste material uses back
Mill processing, causes great waste, increases manufacturing cost.
Summary of the invention
The present invention overcomes the deficiencies in the prior art, provide a kind of preparation of mullite spherical shape aggregate enhancing refractory material
Method.This method is used as spherical aggregate using the haydite sand waste of mullite, and the spherical haydite that different size levels are matched is added
Sand semi-finished product as matrix, using without pressure, from filling molding, be burnt into high temperature kiln, prepare the enhanced fire proofed wood that gathers materials
Material.
To achieve the goals above, raw material early period that the present invention is used to prepare refractory material is divided into two major class:
The first kind: taking mullite as the haydite sand waste of main crystalline structure.The waste material has the characteristics that following obvious: 1, main
Wanting crystal form is mullite, has good thermal shock resistance and high temperature resistance.2, sphericity with higher, it might even be possible to reach
90% or more sphericity.3, bulk density 1.55-1.76g/cm3Left and right, apparent density are 2.8 ± 0.2g/cm3Left and right.4, haydite
The particle size of sand spherical shape waste material is to be distributed other than product particle size, and distribution of particles concentrates on specific region, and minimum can reach
To 220 mesh.5, ceramsite sand spherical shape waste material does not have moisture, and refractoriness is at 1650 ± 50 DEG C.
Second class: using the spherical semi-finished product of the similar raw material preparation of ceramsite sand scrap feed material as base starting material.1, should
Base starting material has certain semi-finished product intensity, while having spherical exterior appearance.2, the particle size of the spherical shape semi-finished product
It can customize, distribution of particles has the characteristics that distribution is wide, continuous.3, spherical semi-finished product have about 16-20% in sintering process
Contraction.4, the waste material of the spherical shape semi-finished product can carry out crushing recycling and reusing.5, the spherical shape semi-finished product are during the preparation process
It is added to binder, while there is about 10% or so moisture.
Technical scheme is as follows: a kind of preparation method of mullite spherical shape aggregate enhancing refractory material, feature
It is,
(1) raw material forms
Raw material (parts by weight): 30-70 parts of useless ceramsite sand (aggregate), 30-70 parts of spherical haydite sand semi-finished product (matrix)；
The composition of the useless ceramsite sand are as follows: by weight, account for 40-60% in 20 meshes, account for 40- under 140 meshes
60%；
The spherical haydite sand semi-finished product, it is broadly divided into carse, medium and small three classes and is added, and specific size is distributed as (pressing
Weight ratio meter) are as follows:
Thick class: what 10-60 purpose accounted for that 60 ± 5%, 60-120 purpose accounts for 30 ± 3%, 120 mesh or more accounts for 10 ± 2%；
Middle class: what 10-60 purpose accounted for that 30 ± 3%, 60-120 purpose accounts for 40 ± 4%, 120 mesh or more accounts for 30 ± 3%；
Subclass: what 10-60 purpose accounted for that 10 ± 2%, 60-120 purpose accounts for 30 ± 3%, 120 mesh or more accounts for 60 ± 5%；
(2) useless ceramsite sand is collected by mesh number required by step (1) it is stand-by, it is spare and after being arranged in pairs or groups according to aforementioned proportion；
(3) spherical semi-finished product are passed through the double-deck swinging screen and collect step by the stage and semi-finished product in the production process of ceramsite sand
Suddenly mesh number required by (1) is stand-by, and is arranged in pairs or groups out different types of spherical haydite sand semi-finished product according to ratio, spare；
(4) the spherical haydite sand semi-finished product that the useless ceramsite sand and step (3) prepared step (2) prepares are according to step (1)
Parts by weight weighing is mixed and is stirred evenly；
(5) aluminium oxide slurry is prepared in advance be uniformly applied to saggar inner surface, naturally dry, for use；
(6) by step (4) formulation material automatic blanking into ready saggar, aging and vibration moulding integration is completed,
Surface is struck off, refractory material semi-finished product are obtained；
(7) saggar equipped with refractory material semi-finished product for obtaining step (6) adding with 8~25 DEG C/min in tunnel oven
Thermal velocity is burnt into respectively from room temperature to 1400-1450 DEG C or 1500-1550 DEG C of two temperature, keeps the temperature 3-6h, then with 15~
The cooling velocity of 30 DEG C/min cools down, and obtains mullite spherical shape aggregate enhancing refractory material.Its technique is specifically as shown in Figure 1.
Ceramsite sand preferably uses flint clay to be prepared as primary raw material in step (1) of the present invention, after flint clay calcining
Alumina content be about 44-47%.
Further, the formula system of the ceramsite sand is Al2O3-SiO2- MgO, principal crystalline phase is mullite after firing.Match
Square parts by weight are as follows: 80-90 parts of green coke jewel, 5-10 parts of clay, 0-6 parts of talcum.
The preparation process of ceramsite sand is ingredient, ball milling, spraying granulation, crushes pelletizing, is rolled onto step (1) of the present invention
Type, 1400 ± 50 DEG C of rotary kiln calcinings, sieving and packaging.
Spherical haydite sand semi-finished product preparation process is ingredient, ball milling, spraying granulation, crushes granulation in step (1) of the present invention
Powder, rolling molding, screening.It can be directly acquired from ceramsite sand production line semi-finished product, can also put into new formula system
Again it prepares.There is better mobility relative to powdered substrate using the spherical semi-finished product of ceramsite sand, in pressureless compacting process
In easily obtain closely knit semi-finished product.The present invention, which uses the purpose of three kinds of different type spherical shape semi-finished product, to be prepared relative to extrusion forming
Closely knit semi-finished product have controllable internal porosity rate.
For the double-deck swinging screen that step (3) of the present invention uses having a size of 1000*3100, the period is 10-40 times/min.
Step (4) of the present invention uses blender for 2 tons of charging, and stirring rate is that 10-60 turns/min, and each mixing time is
10-40min。
The aluminium oxide slurry that step (5) of the present invention uses be by being obtained after alumina powder, water and polyvinyl alcohol,
Weight ratio is 50:50:0.5, is taken out from saggar after firing convenient for refractory material.Saggar is having a size of 400*350*250.
Ceramsite sand of the present invention is obtained using rotary kiln in 1400 ± 50 DEG C of firings, and the principal crystalline phase of ceramsite sand is mullite, resistance to
Fiery degree is 1650 ± 50 DEG C, when to the ceramsite sand semi-finished product matrix that different type spherical shape is added in ceramsite sand spherical shape waste material, this
Invention takes 1400-1450 DEG C and 1500-1550 DEG C of two different firing temperatures, while obtaining different types of fire resisting
Material.
The present invention compared with prior art, has following outstanding feature:
(1) present invention has high flowing using spherical useless aggregate of the ceramsite sand as novel refractory, the spherical shape aggregate
Property, be conducive to tightly packed and aggregate distributing homogeneity, pass through aggregate reinforce improve refractory material service performance；
(2) present invention improves the ratio of spherical raw material using spherical haydite sand semi-finished product matrix, removes conventional powder
Shape matrix makes spherical aggregate and sphere matrix fill, contact, complete to be formed without pressure, from after filling molding, calcining gather materials it is enhanced
Refractory material；
(3) present invention is recycled for haydite sand waste, is played the intrinsic advantage of waste material, is passed through the shape of spherical aggregate
Formula is introduced into refractory material, has achieved the purpose that improve capabilities of refractory materials, on the other hand also provides what useless ceramsite sand recycled
Technical solution；
(4) present invention prepares novel refractory as spherical aggregate introducing for useless ceramsite sand, eliminates general aggregate
The drawbacks of being unfavorable for size Control improves the mobility of formulation material, obtains more evenly fine and close structure, improves corrosion resistance
Deng.The refractory material is applicable in the demanding field such as mobility, transporting, air-tightness and thermal insulation；
(5) raw material of the invention uses waste recovery, simple production process, and low manufacture cost prepares ball containing mullite
Shape aggregate enhances novel refractory.
Detailed description of the invention
Fig. 1 is refractory material preparation technology flow chart；
Fig. 2 is useless ceramsite sand electromicroscopic photograph；
Fig. 3 is ceramsite sand semi-finished product electromicroscopic photograph.
Specific embodiment
Embodiment is only described further the present invention, but is not limited only to this, and those skilled in the art is not paying wound
The property made obtains other embodiments under the premise of working, and belongs to the scope of protection of the invention.
The acquisition methods of useless ceramsite sand are as follows:
(1) (parts by weight) are matched: 90 parts of green coke jewel, 8 parts of clay, 2 parts of talcum.The wherein chemical composition of flint clay raw material
(weight ratio): Al2O338.5%, SiO244.5%, Fe2O30.89%, K2O 0.1%, Na2O 0.12%, CaO
0.12%, MgO 0.18%, TiO20.6%；It burns and loses 14.2%.
Green coke jewel and talcum are sent into crusher and are broken for 5-10mm；Then clay is added to be uniformly mixed；
(2) above-mentioned raw materials are fitted into wet ball mill plus water-wet grinds (in mass ratio, mixture: alumina balls grinding medium
Matter: water=1:2.0~2.5:0.8~1.2), after then being screened by 325 included mesh screens, obtain mud；
(3) slurry is put into stock tank and stirs, is aging；Then the slurry after will be aging squeezes into spray drying by plunger pump
Granulation is dried in tower, obtains the discrete particles that moisture content is 1~5%；The inlet temperature of the spray drying tower be 550~
750 DEG C, outlet temperature is 110~135 DEG C；The spray drying tower is centrifugal or pressure type granulation tower；
(4) powder material scattering: step (3) obtained discrete particles are broken up again as partial size after wet-milling using bale breaking equipment
Powder；
(5) it is granulated: and then powder is transferred in disk pelletizing machine, under the unidirectional uniform rotation of granulator, concentration, which is added, is
1% polyvinyl alcohol water solution rolling molding, is then fired using rotary kiln at 1400 DEG C, and the principal crystalline phase of ceramsite sand is not come
Stone, refractoriness are 1650 DEG C；
(6) then by sieving, in 20 meshes, the useless ceramsite sand under 140 meshes is met the size requirements for the present invention
Finished product for gas production or recover the oil use.
90% or more useless ceramsite sand sphericity obtained；Bulk density is 1.65g/cm3, apparent density 2.80g/cm3。
Product is as shown in Figure 2.
The acquisition methods of spherical haydite sand semi-finished product are as follows:
(1)~(4) step is same as above.
(5) it is granulated: and then powder is transferred in disk pelletizing machine, under the unidirectional uniform rotation of granulator, concentration, which is added, is
1% polyvinyl alcohol water solution rolling molding, the mesh number spherical semi-finished product passed through required by the double-deck swinging screen is collected is stand-by, and root
According to the spherical semi-finished product matrix of thick class ratio collocation.The water content of the spherical haydite sand semi-finished product is 10 ± 2%.Product such as Fig. 3 institute
Show.
Embodiment 1:
(1) raw material forms
It matches (parts by weight): 70 parts of useless ceramsite sand (aggregate), 30 parts of spherical haydite sand semi-finished product (matrix)；
Wherein the group of useless ceramsite sand becomes (weight ratio): accounting for 40% in 20 meshes, accounts for 60% under 140 meshes；
Spherical haydite sand semi-finished product are added using thick class, and specific size is distributed as (weight ratio): 10-60 purpose accounts for
60%, 60-120 purpose account for 30%, more than 120 mesh account for 10%.
(2) useless ceramsite sand is collected for use by mesh number required by step (1), and is arranged in pairs or groups according to ratio；
(3) in the production stage and semi-finished product of ceramsite sand, spherical semi-finished product is passed through into the double-deck swinging screen collection step (1) and are wanted
The mesh number asked is stand-by, and according to the spherical semi-finished product matrix of thick class ratio collocation；The double-deck swinging screen is having a size of 1000*3100, period
For 20 times/min；
(4) the spherical semi-finished product matrix that useless ceramsite sand aggregate and step (3) that step (2) prepare prepare is weighed,
It mixes and stirs evenly；Wherein use blender for 2 tons of charging, stirring rate is 10 turns/min, and each mixing time is
40min；
(5) it prepares aluminium oxide slurry in advance to be uniformly applied to having a size of 400*350*250 saggar inner surface, naturally dry waits for
With；Wherein aluminium oxide slurry is 50:50:0.5 by weight alumina powder, water and polyvinyl alcohol；
(6) by step (4) formulation material automatic blanking into ready saggar, aging and vibration moulding integration is completed,
Surface is struck off, qualitative refractory material semi-finished product are obtained；
(7) by step (6) obtain the saggar equipped with refractory material in tunnel oven with the heating speed of 25 DEG C/min oneself
Room temperature is warming up to 1440 DEG C or 1540 DEG C firings respectively, keeps the temperature 6h, then cool down with the cooling velocity of 15 DEG C/min, obtains containing not next
Stone spherical shape aggregate enhances novel refractory.
The capabilities of refractory materials index of acquisition is shown in Table 1.
Embodiment 2:
(1) raw material forms
It matches (parts by weight): 65 parts of useless ceramsite sand (aggregate), 35 parts of spherical haydite sand semi-finished product (matrix),
Wherein the group of useless ceramsite sand becomes (weight ratio): wherein accounting for 50% in 20 meshes, accounts for 50% under 140 meshes；
Wherein class is added in the use of spherical haydite sand semi-finished product, and specific size is distributed as (weight ratio): 10-60 purpose
It accounts for 30%, 60-120 purpose and accounts for 40%, more than 120 mesh account for 30%；
(2) useless ceramsite sand is collected for use by mesh number required by step (1), and is arranged in pairs or groups according to ratio；
(3) in the production stage and semi-finished product of ceramsite sand, spherical semi-finished product is passed through into the double-deck swinging screen collection step (1) and are wanted
The mesh number asked is stand-by, and according to the spherical semi-finished product matrix of middle class ratio collocation.The double-deck swinging screen is having a size of 1000*3100, period
For 25 times/min；
(4) weighing of spherical semi-finished product matrix, the mixing that the useless ceramsite sand aggregate and step (3) prepared step (2) prepares
With stir evenly；Wherein use blender for 2 tons of charging, stirring rate is 15 turns/min, and each mixing time is 30min；
(5) it prepares aluminium oxide slurry in advance to be uniformly applied to having a size of 400*350*250 saggar inner surface, naturally dry waits for
With wherein aluminium oxide slurry, is 50:50:0.5 by weight alumina powder, water and polyvinyl alcohol；
(6) by step (4) formulation material automatic blanking to ready saggar in, aging and vibration moulding integration is complete
At surface is struck off, qualitative refractory material semi-finished product are obtained；
(7) by step (6) obtain the saggar equipped with refractory material in tunnel oven with the heating speed of 20 DEG C/min oneself
Room temperature is warming up to 1430 DEG C or 1530 DEG C firings respectively, keeps the temperature 6h, then cool down with the cooling velocity of 19 DEG C/min, obtains containing not next
Stone spherical shape aggregate enhances novel refractory.
The capabilities of refractory materials index of acquisition is shown in Table 1.
Embodiment 3:
(1) raw material forms
It matches (parts by weight): 70 parts of useless ceramsite sand (aggregate), 30 parts of spherical haydite sand semi-finished product (matrix)；
The group of the useless ceramsite sand becomes (weight ratio): accounting for 60% in 20 meshes, accounts for 40% under 140 meshes；
Spherical haydite sand semi-finished product are added using subclass, and specific size is distributed as (weight ratio): 10-60 purpose accounts for
10%, 60-120 purpose account for 30%, more than 120 mesh account for 60%；
(2) useless ceramsite sand is collected for use by mesh number required by step (1), and is arranged in pairs or groups according to ratio；
(3) in the production stage and semi-finished product of ceramsite sand, spherical semi-finished product is passed through into the double-deck swinging screen collection step (1) and are wanted
The mesh number asked is stand-by, and according to the spherical semi-finished product matrix of subclass ratio collocation.The double-deck swinging screen is having a size of 1000*3100, period
For 35 times/min；
(4) weighing of spherical semi-finished product matrix, the mixing that the useless ceramsite sand aggregate and step (3) prepared step (2) prepares
With stir evenly；Wherein use blender for 2 tons of charging, stirring rate is 40 turns/min, and each mixing time is 40min；
(5) it prepares aluminium oxide slurry in advance to be uniformly applied to having a size of 400*350*250 saggar inner surface, naturally dry waits for
With wherein aluminium oxide slurry, is 50:50:0.5 by weight alumina powder, water and polyvinyl alcohol；
(6) by step (4) formulation material automatic blanking to ready saggar in, aging and vibration moulding integration is complete
At surface is struck off, qualitative refractory material semi-finished product are obtained；
(7) by step (6) obtain the saggar equipped with refractory material in tunnel oven with the heating speed of 25 DEG C/min oneself
Room temperature keeps the temperature 6h to 1420 DEG C or 1520 DEG C firings, then is cooled down with the cooling velocity of 15 DEG C/min, obtains ball containing mullite
Shape aggregate enhances novel refractory.
The capabilities of refractory materials index of acquisition is shown in Table 1.
1 capabilities of refractory materials index of table
Claims (9)
1. a kind of preparation method of mullite spherical shape aggregate enhancing refractory material, characterized in that
(1) raw material forms
Raw material and parts by weight: ceramsite sand 30-70 parts useless, 30-70 parts of spherical haydite sand semi-finished product；The spherical haydite sand semi-finished product
It is by ingredient, ball milling, spraying granulation, crushes made from pelletizing, rolling molding and screening；
The composition of the useless ceramsite sand are as follows: by weight, account for 40-60% in 20 meshes, account for 40-60% under 140 meshes；
The spherical haydite sand semi-finished product, it is divided into carse, medium and small three classes and is added, and specific size is distributed as, by weight
Meter:
Thick class: what 10-60 purpose accounted for that 60 ± 5%, 60-120 purpose accounts for 30 ± 3%, 120 mesh or more accounts for 10 ± 2%；
Middle class: what 10-60 purpose accounted for that 30 ± 3%, 60-120 purpose accounts for 40 ± 4%, 120 mesh or more accounts for 30 ± 3%；
Subclass: what 10-60 purpose accounted for that 10 ± 2%, 60-120 purpose accounts for 30 ± 3%, 120 mesh or more accounts for 60 ± 5%；
(2) useless ceramsite sand is collected by mesh number required by step (1) it is stand-by, it is spare and after being arranged in pairs or groups according to aforementioned proportion；
(3) stage and semi-finished product in the production process of ceramsite sand, mesh number spherical shape semi-finished product required by collection step (1) wait for
With, and arranged in pairs or groups out different types of spherical haydite sand semi-finished product according to ratio, it is spare；
(4) the spherical haydite sand semi-finished product that the useless ceramsite sand and step (3) prepared step (2) prepares are according to step (1) weight
Part weighing is mixed and is stirred evenly；
(5) aluminium oxide slurry is prepared in advance be uniformly applied to saggar inner surface, naturally dry, for use；
(6) by step (4) formulation material automatic blanking into ready saggar, aging and vibration moulding integration is completed, by table
Face strikes off, and obtains refractory material semi-finished product；
(7) saggar equipped with refractory material semi-finished product for obtaining step (6) is in tunnel oven with the heating speed of 8~25 DEG C/min
Degree keeps the temperature 3-6h from room temperature to 1400-1450 DEG C or 1500-1550 DEG C firing, then with the cooling speed of 15~30 DEG C/min
Degree cooling obtains the aggregate of spherical shape containing mullite enhancing refractory material.
2. a kind of preparation method of mullite spherical shape aggregate enhancing refractory material as described in claim 1, characterized in that described
Principal crystalline phase is mullite after useless ceramsite sand firing, and refractoriness is 1650 ± 50 DEG C.
3. a kind of preparation method of mullite spherical shape aggregate enhancing refractory material as claimed in claim 2, characterized in that described
The bulk density of useless ceramsite sand is 1.55-1.76g/cm3, apparent density is 2.8 ± 0.2g/cm3。
4. a kind of preparation method of mullite spherical shape aggregate enhancing refractory material as described in claim 1, characterized in that described
Useless ceramsite sand and spherical haydite sand semi-finished product are all made of flint clay and are prepared as primary raw material.
5. a kind of preparation method of mullite spherical shape aggregate enhancing refractory material as claimed in claim 4, characterized in that described
The raw material and parts by weight of useless ceramsite sand and spherical haydite sand semi-finished product are as follows: 80-90 parts of green coke jewel, 5-10 parts of clay, talcum 0-6
Part.
6. a kind of preparation method of mullite spherical shape aggregate enhancing refractory material as claimed in claim 5, characterized in that described
Useless ceramsite sand the preparation method comprises the following steps: ingredient, ball milling, spraying granulation, crushing pelletizing, rolling molding, 1400 ± 50 DEG C of rotary kiln
Calcining, sieving.
7. a kind of preparation method of mullite spherical shape aggregate enhancing refractory material as described in any one of claim 1-6,
It is characterized in that the step (3) is collected by the double-deck swinging screen, the double-deck swinging screen period is 10-40 times/min.
8. a kind of preparation method of mullite spherical shape aggregate enhancing refractory material as described in any one of claim 1-6,
It is characterized in that the blender stirring rate that step (4) stirring uses turns/min for 10-60, each mixing time is 10-
40min。
9. a kind of preparation method of mullite spherical shape aggregate enhancing refractory material as described in any one of claim 1-6,
It is characterized in that the aluminium oxide slurry that the step (5) uses be by being obtained after alumina powder, water and polyvinyl alcohol,
Weight ratio is 50:50:0.5.
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| CN107200599B (en) * | 2017-06-16 | 2020-04-03 | 深圳市商德先进陶瓷股份有限公司 | Porous alumina ceramic and preparation method and application thereof |
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