CN106396696A - Preparation method of mullite spherical aggregate reinforced refractory material - Google Patents
Preparation method of mullite spherical aggregate reinforced refractory material Download PDFInfo
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- CN106396696A CN106396696A CN201610737736.6A CN201610737736A CN106396696A CN 106396696 A CN106396696 A CN 106396696A CN 201610737736 A CN201610737736 A CN 201610737736A CN 106396696 A CN106396696 A CN 106396696A
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- C—CHEMISTRY; METALLURGY
- 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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- C—CHEMISTRY; METALLURGY
- 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
- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/04—Clay; Kaolin
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- C—CHEMISTRY; METALLURGY
- 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
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/009—Porous or hollow ceramic granular materials, e.g. microballoons
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Abstract
The invention discloses a preparation method of a mullite spherical aggregate reinforced refractory material. According to the preparation method, mullite ceramsite sand waste material is taken as a spherical aggregate, spherical ceramsite sand semi-finished products of different size grades are added as a matrix, and the mullite spherical aggregate reinforced refractory material is obtained via pressureless self-padding molding and sintering in a high temperature kiln. The spherical waste ceramsite sand is taken as the aggregate of the mullite spherical aggregate reinforced refractory material, the spherical aggregate possesses high fluidity, is beneficial for close packing and uniformity of aggregate distribution, and application performance of the mullite spherical aggregate reinforced refractory material is improved via reinforcing with the aggregate; the spherical ceramsite sand semi-finished product matrix is capable of increasing the ratio of spherical raw materials, application of a conventional powdery matrix is avoided, padding and contacting of the spherical aggregate with the spherical matrix is realized, and pressureless self-padding molding is realized. The mullite spherical aggregate reinforced refractory material is suitable to be applied in fields with high requirements on fluidity, transportation performance, air impermeability, and heat insulation properties.
Description
Technical field
The invention belongs to technical field of refractory materials is and in particular to the spherical aggregate of mullite strengthens the preparation side of refractory material
Method.
Background technology
Refractory material is that a class ensures that hot industry normally runs, or even hot industry makes the enable of some technological progresses
Material is so that such as iron and steel, cement, non-ferrous metal, glass, ceramic and various machinery, the manufacture of chemical products and be processed into can
Energy.Conventional refractory materials preparation technology is：Aggregate (irregular particle) and base starting material (fine powder) are mixed, then using not
Same moulding process is prepared as qualitative refractory material or uses directly as castable.For a long time, the changing of capabilities of refractory materials
It is apt to and innovate more setting about in terms of substrate.The interaction of the characteristic of aggregate itself, aggregate and substrate, shadow to a great extent
Ring the overall performance of refractory material, ignored.Traditional aggregate preparation method is：Required raw material is directly fired, crushes
And screening, the grog of bulk is obtained through broken and classification.The aggregate of the method preparation is in irregular shape, each granularity model
Particle size distribution in enclosing is difficult to control to.Meanwhile, form the grog after specific crystal formation structure to crush through various equipment, to its aggregate
Shape, performance produce impact.
With the development of technology, occur in that alumina hollow ball refractory material in high temperature, field of heat insulating materials, its fire proofed wood
Material is hollow, spherical aggregate, and it has excellent performance.Spherical aggregate is directed to advantage in refractory material for the irregular aggregate
Also just all the more obvious.But spherical solid aggregate processing is but that technology is difficult for the manufacturer preparing irregular aggregate in the past
Topic.
Ceramsite sand is a kind of spherical ceramic product of synthetic, is primarily used to the natural gas between mining rock stratum or stone
Oil.Use environment has sphericity, resistance to acids and bases, bulk density, comprcssive strength, grain composition etc. all to require to it.Product root
High-density high-strength (apparent density ＞ 3.0g/cm substantially can be 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 the use producer recovered the oil, according to its experiment for many years and application experience, in order to expand ceramsite sand water conservancy diversion in use
Rate is it is desirable to the size of product is based on 20-40 mesh, 30-50 mesh, 40-70 mesh and 70-140 mesh.Manufacturer as ceramsite sand
Then require the product mesh number fired to concentrate in the interval of regulation and meet other indexs simultaneously, basic technology is dispensing, ball milling, system
Powder, rolling balling-up, sieve, burn till and sieve.During entirely preparing ceramsite sand, the mesh number product on sieve and under sieve can only
Stack as waste material, the performance of its waste material is the same with product, and simply size is undesirable, and final waste material adopts back
Mill is processed, and causes great waste, increased manufacturing cost.
Content of the invention
Instant invention overcomes the deficiencies in the prior art, there is provided a kind of spherical aggregate of mullite strengthens the preparation of refractory material
Method.The method adopts the haydite sand waste of mullite as spherical aggregate, and adds the spherical haydite that different size level joins
Sand semi-finished product, as substrate, using no pressure, from filling molding, burn till in high temperature kiln, prepare the enhancement mode fire proofed wood that gathers materials
Material.
To achieve these goals, the present invention is divided into two big class for the early stage raw material preparing refractory material：
The first kind：The haydite sand waste being main crystalline structure with mullite.This waste material has following obvious feature：1st, main
Want crystal formation to be mullite, there is good thermal shock resistance and resistance to elevated temperatures.2nd, there is higher sphericity it might even be possible to reach
Sphericity more than 90%.3rd, bulk density is 1.55-1.76g/cm3Left and right, apparent density is 2.8 ± 0.2g/cm3Left and right.4th, haydite
The particle size of the spherical waste material of sand is distribution beyond product particle size, and distribution of particles concentrates on specific region, and minimum can reach
To 220 mesh.5th, the spherical waste material of ceramsite sand does not have moisture, and refractoriness is at 1650 ± 50 DEG C.
Equations of The Second Kind：The spherical semi-finished product of the raw material preparation being similar to using ceramsite sand scrap feed material are as base starting material.1st, should
Base starting material has certain semi-finished product intensity, has spherical exterior appearance simultaneously.2nd, the particle size of this spherical semi-finished product
Can customize, distribution of particles has wide, the continuous feature of distribution.3rd, spherical semi-finished product have about 16-20% in sintering process
Contraction.4th, the waste material of this spherical semi-finished product can carry out pulverizing recycling.5th, this spherical semi-finished product is in preparation process
With the addition of binding agent, there is about 10% about moisture simultaneously.
Technical scheme is as follows：A kind of spherical aggregate of mullite strengthens the preparation method of refractory material, its feature
It is,
(1) raw material composition
Raw material (weight portion)：Useless ceramsite sand (aggregate) 30-70 part, spherical haydite sand semi-finished product (substrate) 30-70 part；
The consisting of of described useless ceramsite sand：By weight, 20 mesh sieves account for 40-60%, under 140 mesh sieves, account for 40-
60%；
Described spherical haydite sand semi-finished product, it is broadly divided into carse, medium and small three classes and adds, and its specific distribution of sizes is (to press
Weight ratio meter) be：
Thick class：What 10-60 purpose accounted for that 60 ± 5%, 60-120 purpose accounts for more than 30 ± 3%, 120 mesh accounts for 10 ± 2%；
Middle class：What 10-60 purpose accounted for that 30 ± 3%, 60-120 purpose accounts for more than 40 ± 4%, 120 mesh accounts for 30 ± 3%；
Subclass：What 10-60 purpose accounted for that 10 ± 2%, 60-120 purpose accounts for more than 30 ± 3%, 120 mesh accounts for 60 ± 5%；
(2) mesh number as required by step (1) for the useless ceramsite sand is collected stand-by, and according to aforementioned proportion collocation after, standby；
(3) stage and semi-finished product in the production process of ceramsite sand, spherical semi-finished product is passed through double-deck rocking sieve collection and walks
Suddenly the 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, standby；
(4) the spherical haydite sand semi-finished product that the useless ceramsite sand preparing step (2) and step (3) prepare are according to step (1)
Weight portion is weighed, mixes and is stirred；
(5) prepare aluminium oxide slurry uniform application in advance in saggar inner surface, naturally dry, stand-by；
(6) by step (4) formulation material automatic blanking in ready saggar, old and vibration moulding integration completes,
Surface is struck off, obtains refractory material semi-finished product；
(7) saggar equipped with refractory material semi-finished product that step (6) is obtained in tunnel cave with 8～25 DEG C/min's plus
Thermal velocity is burnt till from room temperature respectively to 1400-1450 DEG C or 1500-1550 DEG C of two temperature, is incubated 3-6h, then with 15～
The rate of cooling cooling of 30 DEG C/min, obtains the spherical aggregate of mullite and strengthens refractory material.Its technique is specifically as shown in Figure 1.
In step (1) of the present invention, ceramsite sand preferably employs flint clay and is prepared from as primary raw material, after flint clay calcining
Alumina content be about 44-47%.
Further, the formula system of described ceramsite sand is Al2O3-SiO2- MgO, burning till rear principal crystalline phase is mullite.Join
Square weight portion is：Green coke gem 80-90 part, clay 5-10 part, Talcum 0-6 part.
In step (1) of the present invention the preparation technology of ceramsite sand be dispensing, ball milling, spray granulation, pulverize pelletizing, be rolled onto
Type, 1400 ± 50 DEG C of rotary kiln are calcined, sieve and pack.
In step (1) of the present invention spherical haydite sand semi-finished product preparation technology be dispensing, ball milling, spray granulation, pulverize pelletize
Powder, rolling molding, screening.It can at ceramsite sand production line semi-finished product direct access it is also possible to put into new formula system
Again prepare.Spherical semi-finished product using ceramsite sand have more preferable mobility with respect to powdered substrate, in pressureless compacting process
In easily obtain closely knit semi-finished product.The present invention is with respect to extrusion forming preparation using three kinds of dissimilar spherical semi-finished product purposes
Closely knit semi-finished product there is controlled internal porosity rate.
The rocking sieve a size of 1000*3100 of bilayer that step (3) of the present invention adopts, the cycle is 10-40 time/min.
It is 2 tons of charging that step (4) of the present invention adopts blender, and stir speed (S.S.) turns/min for 10-60, and each mixing time is
10-40min.
The aluminium oxide slurry that step (5) of the present invention adopts is to be obtained after alumina powder, water and polyvinyl alcohol, its
Weight is than for 50:50:0.5, it is easy to refractory material and take out from saggar after firing.Saggar a size of 400*350*250.
Ceramsite sand of the present invention adopts rotary kiln to fire acquisition at 1400 ± 50 DEG C, and the principal crystalline phase of ceramsite sand is mullite, resistance to
Fiery degree is 1650 ± 50 DEG C, when adding dissimilar spherical ceramsite sand semi-finished product substrate in the spherical waste material of ceramsite sand, this
Invention take 1400-1450 DEG C with 1500-1550 DEG C of two different firing temperatures, obtain different types of fire resisting simultaneously
Material.
The present invention compared with prior art, has following outstanding feature：
(1) present invention adopts spherical useless ceramsite sand as the aggregate of novel refractory, and this spherical aggregate has high flowing
Property, be conducive to tightly packed and aggregate distributing homogeneity, strengthen improving the serviceability of refractory material by aggregate；
(2) present invention improves the ratio of spherical raw material using spherical haydite sand semi-finished product substrate, removes the powder of routine
Shape substrate, makes spherical aggregate fill with sphere matrix, contact, and completes no to press, forms enhancement mode of gathering materials from after filling molding, calcining
Refractory material；
(3) present invention is recycled for haydite sand waste, plays the intrinsic advantage of waste material, by the shape of spherical aggregate
Formula is introduced in refractory material, has reached the purpose improving capabilities of refractory materials, on the other hand also provides for what useless ceramsite sand recycled
Technical scheme；
(4) present invention prepares novel refractory for useless ceramsite sand as spherical aggregate introducing, eliminates general aggregate
The drawbacks of be unfavorable for size Control, improves the mobility of formulation material, obtains evenly fine and close structure, improves corrosion resistance
Deng.This refractory material is suitable for the field that mobility, transporting, air-tightness and thermal insulation etc. are had high demands；
(5) raw material of the present invention adopts waste recovery, simple production process, low manufacture cost, prepares ball containing mullite
Shape aggregate strengthens novel refractory.
Brief description
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 to the present invention, but is not limited only to this, and those skilled in the art is not paying wound
Obtain other embodiment on the premise of the property made work, belong to the scope of protection of the invention.
The acquisition methods of useless ceramsite sand are as follows：
(1) proportioning (weight portion)：90 parts of green coke gem, 8 parts of clay, 2 parts of Talcum.The chemical composition of wherein 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%；Burn mistake 14.2%.
Green coke gem and Talcum are sent in disintegrating machine and is broken for 5-10mm；It is subsequently adding clay mix homogeneously；
(2) above-mentioned raw materials are loaded wet grinding (in mass ratio, the compound that adds water in wet ball mill：Alumina balls grinding medium
Matter：Water=1：2.0～2.5：0.8～1.2), after 325 eye mesh screens, then passing through to carry are screened, obtain mud；
(3) slurry is put in stock tank stirring, old；Then the slurry after will be old squeezes into spray drying by plunger displacement pump
Tower is dried pelletize, obtains the discrete particles that moisture is 1～5%；The inlet temperature of described spray drying tower be 550～
750 DEG C, outlet temperature is 110～135 DEG C；Described spray drying tower is centrifugal or pressure type granulation tower；
(4) powder material scattering：Using bale breaking equipment, the discrete particles obtained by step (3) are broken up again as particle diameter after wet grinding
Powder；
(5) pelletize：Then powder is proceeded in disk pelletizing machine, under the unidirectional uniform rotation of granulator, addition concentration is
1% polyvinyl alcohol water solution rolling molding, is then fired at 1400 DEG C using rotary kiln and forms, and the principal crystalline phase of ceramsite sand is not come
Stone, refractoriness is 1650 DEG C；
(6) it is then passed through sieving, on 20 mesh sieves, the useless ceramsite sand under 140 mesh sieves is used for the present invention, meets dimensional requirement
Finished product be used for gas production or recover the oil use.
The useless ceramsite sand sphericity more than 90% being obtained；Bulk density is 1.65g/cm3, apparent density is 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 ibid.
(5) pelletize：Then powder is proceeded in disk pelletizing machine, under the unidirectional uniform rotation of granulator, addition concentration is
1% polyvinyl alcohol water solution rolling molding, the mesh number spherical semi-finished product passed through required by double-deck rocking sieve collection is stand-by, and root
According to the thick class ratio spherical semi-finished product substrate of collocation.The water content of this spherical haydite sand semi-finished product is 10 ± 2%.Product such as Fig. 3 institute
Show.
Embodiment 1：
(1) raw material composition
Proportioning (weight portion)：70 parts of useless ceramsite sand (aggregate), 30 parts of spherical haydite sand semi-finished product (substrate)；
Wherein useless ceramsite sand consist of (weight ratio)：Account for 40% on 20 mesh sieves, under 140 mesh sieves, account for 60%；
Spherical haydite sand semi-finished product adopt thick class to add, and its specific distribution of sizes is (weight ratio)：10-60 purpose accounts for
60%, 60-120 purpose accounts for 30%, more than 120 mesh accounts for 10%.
(2) by useless ceramsite sand, the mesh number collection as required by step (1) is stand-by, 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 are wanted by double-deck rocking sieve collection step (1)
The mesh number asked is stand-by, and according to the thick class ratio spherical semi-finished product substrate of collocation；Double-deck rocking sieve a size of 1000*3100, the cycle
For 20 times/min；
The spherical semi-finished product substrate that the useless ceramsite sand aggregate (4) preparing step (2) and step (3) prepare carries out weighing,
Mix and stir；Blender is wherein adopted to be 2 tons of charging, stir speed (S.S.) is 10 turns/min, each mixing time is
40min；
(5) prepare aluminium oxide slurry uniform application in advance in a size of 400*350*250 saggar inner surface, naturally dry and treat
With；Wherein aluminium oxide slurry, is 50 by weight alumina powder, water and polyvinyl alcohol:50:0.5；
(6) by step (4) formulation material automatic blanking in ready saggar, old and vibration moulding integration completes,
Surface is struck off, obtains qualitative refractory material semi-finished product；
(7) saggar equipped with refractory material that step (6) is obtained in tunnel cave with the firing rate of 25 DEG C/min from
Room temperature is warming up to 1440 DEG C or 1540 DEG C respectively and burns till, and is incubated 6h, then the rate of cooling cooling with 15 DEG C/min, obtains containing not coming
The spherical aggregate of stone strengthens novel refractory.
The capabilities of refractory materials index obtaining is shown in Table 1.
Embodiment 2：
(1) raw material composition
Proportioning (weight portion)：65 parts of useless ceramsite sand (aggregate), 35 parts of spherical haydite sand semi-finished product (substrate),
Wherein useless ceramsite sand consist of (weight ratio)：Account for 50% on wherein 20 mesh sieves, under 140 mesh sieves, account for 50%；
During wherein spherical haydite sand semi-finished product adopt, class adds, and its specific distribution of sizes is (weight ratio)：10-60 purpose
Account for 30%, 60-120 purpose and account for 40%, more than 120 mesh account for 30%；
(2) by useless ceramsite sand, the mesh number collection as required by step (1) is stand-by, 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 are wanted by double-deck rocking sieve collection step (1)
The mesh number asked is stand-by, and according to the middle class ratio spherical semi-finished product substrate of collocation.Double-deck rocking sieve a size of 1000*3100, the cycle
For 25 times/min；
(4) the spherical semi-finished product substrate that the useless ceramsite sand aggregate preparing step (2) and step (3) prepare is weighed, is mixed
With stir；Blender is wherein adopted to be 2 tons of charging, stir speed (S.S.) is 15 turns/min, each mixing time is 30min；
(5) prepare aluminium oxide slurry uniform application in advance in a size of 400*350*250 saggar inner surface, naturally dry and treat
With wherein aluminium oxide slurry, is 50 by weight alumina powder, water and polyvinyl alcohol:50:0.5；
(6) by step (4) formulation material automatic blanking to ready saggar in, old and vibration moulding integration is complete
Become, surface is struck off, obtain qualitative refractory material semi-finished product；
(7) saggar equipped with refractory material that step (6) is obtained in tunnel cave with the firing rate of 20 DEG C/min from
Room temperature is warming up to 1430 DEG C or 1530 DEG C respectively and burns till, and is incubated 6h, then the rate of cooling cooling with 19 DEG C/min, obtains containing not coming
The spherical aggregate of stone strengthens novel refractory.
The capabilities of refractory materials index obtaining is shown in Table 1.
Embodiment 3：
(1) raw material composition
Proportioning (weight portion)：70 parts of useless ceramsite sand (aggregate), 30 parts of spherical haydite sand semi-finished product (substrate)；
Described useless ceramsite sand consist of (weight ratio)：Account for 60% on 20 mesh sieves, under 140 mesh sieves, account for 40%；
Spherical haydite sand semi-finished product adopt subclass to add, and its specific distribution of sizes is (weight ratio)：10-60 purpose accounts for
10%, 60-120 purpose accounts for 30%, more than 120 mesh accounts for 60%；
(2) by useless ceramsite sand, the mesh number collection as required by step (1) is stand-by, 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 are wanted by double-deck rocking sieve collection step (1)
The mesh number asked is stand-by, and according to the subclass ratio spherical semi-finished product substrate of collocation.Double-deck rocking sieve a size of 1000*3100, the cycle
For 35 times/min；
(4) the spherical semi-finished product substrate that the useless ceramsite sand aggregate preparing step (2) and step (3) prepare is weighed, is mixed
With stir；Blender is wherein adopted to be 2 tons of charging, stir speed (S.S.) is 40 turns/min, each mixing time is 40min；
(5) prepare aluminium oxide slurry uniform application in advance in a size of 400*350*250 saggar inner surface, naturally dry and treat
With wherein aluminium oxide slurry, is 50 by weight alumina powder, water and polyvinyl alcohol:50:0.5；
(6) by step (4) formulation material automatic blanking to ready saggar in, old and vibration moulding integration is complete
Become, surface is struck off, obtain qualitative refractory material semi-finished product；
(7) saggar equipped with refractory material that step (6) is obtained in tunnel cave with the firing rate of 25 DEG C/min from
Room temperature burns till to 1420 DEG C or 1520 DEG C, is incubated 6h, then the rate of cooling cooling with 15 DEG C/min, obtains ball containing mullite
Shape aggregate strengthens novel refractory.
The capabilities of refractory materials index obtaining is shown in Table 1.
Table 1 capabilities of refractory materials index
Claims (10)
1. a kind of spherical aggregate of mullite strengthens the preparation method of refractory material, it is characterized in that,
(1) raw material composition
Raw material and weight portion：Useless ceramsite sand 30-70 part, spherical haydite sand semi-finished product 30-70 part；
The consisting of of described useless ceramsite sand：By weight, 20 mesh sieves account for 40-60%, under 140 mesh sieves, account for 40-60%；
Described spherical haydite sand semi-finished product, it is divided into carse, medium and small three classes to add, and its specific distribution of sizes is, by weight
Meter：
Thick class：What 10-60 purpose accounted for that 60 ± 5%, 60-120 purpose accounts for more than 30 ± 3%, 120 mesh accounts for 10 ± 2%；
Middle class：What 10-60 purpose accounted for that 30 ± 3%, 60-120 purpose accounts for more than 40 ± 4%, 120 mesh accounts for 30 ± 3%；
Subclass：What 10-60 purpose accounted for that 10 ± 2%, 60-120 purpose accounts for more than 30 ± 3%, 120 mesh accounts for 60 ± 5%；
(2) mesh number as required by step (1) for the useless ceramsite sand is collected stand-by, and according to aforementioned proportion collocation after, standby；
(3) stage and semi-finished product in the production process of ceramsite sand, the spherical semi-finished product of mesh number required by collection step (1) are treated
With, and arranged in pairs or groups out different types of spherical haydite sand semi-finished product according to ratio, standby；
(4) the spherical haydite sand semi-finished product that the useless ceramsite sand preparing step (2) and step (3) prepare are according to step (1) weight
Part is weighed, mixes and is stirred；
(5) prepare aluminium oxide slurry uniform application in advance in saggar inner surface, naturally dry, stand-by；
(6) by step (4) formulation material automatic blanking in ready saggar, old and vibration moulding integration completes, by table
Face strikes off, and obtains refractory material semi-finished product；
(7) saggar equipped with refractory material semi-finished product that step (6) is obtained in tunnel cave with the heating speed of 8～25 DEG C/min
Degree burns till from room temperature to 1400-1450 DEG C or 1500-1550 DEG C, is incubated 3-6h, then the cooling speed with 15～30 DEG C/min
Degree cooling, obtains containing to come stone spherical aggregate enhancing refractory material.
2. a kind of spherical aggregate of mullite strengthens the preparation method of refractory material as claimed in claim 1, it is characterized in that, described
The principal crystalline phase of useless ceramsite sand is mullite, and refractoriness is 1650 ± 50 DEG C.
3. a kind of spherical aggregate of mullite strengthens the preparation method of refractory material as claimed in claim 2, it is 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 spherical aggregate of mullite strengthens the preparation method of refractory material as claimed in claim 1, it is characterized in that, described
Useless ceramsite sand and spherical haydite sand semi-finished product are all prepared from as primary raw material using flint clay.
5. a kind of spherical aggregate of mullite strengthens the preparation method of refractory material as claimed in claim 4, it is characterized in that, described
The raw material of useless ceramsite sand and spherical haydite sand semi-finished product and weight portion are：Green coke gem 80-90 part, clay 5-10 part, Talcum 0-6
Part.
6. a kind of spherical aggregate of mullite strengthens the preparation method of refractory material as claimed in claim 5, it is characterized in that, described
The preparation method of useless ceramsite sand is：Dispensing, ball milling, spray granulation, pulverizing pelletizing, rolling molding, 1400 ± 50 DEG C of rotary kiln
Calcine, sieve.
7. a kind of spherical aggregate of mullite strengthens the preparation method of refractory material as claimed in claim 5, it is characterized in that, described
Spherical haydite sand semi-finished product preparation method is：Dispensing, ball milling, spray granulation, pulverizing pelletizing, rolling molding and screening.
8. the spherical aggregate of a kind of mullite as described in any one in claim 1-7 strengthens the preparation method of refractory material,
It is characterized in that, described step (3) is collected by bilayer is rocking sieve, the double-deck rocking sieve cycle is 10-40 time/min.
9. the spherical aggregate of a kind of mullite as described in any one in claim 1-7 strengthens the preparation method of refractory material,
It is characterized in that, the blender stir speed (S.S.) that described step (4) stirring adopts turns/min for 10-60, and each mixing time is 10-
40min.
10. the spherical aggregate of a kind of mullite as described in any one in claim 1-7 strengthens the preparation method of refractory material,
It is characterized in that, the aluminium oxide slurry that described step (5) adopts is to be obtained after alumina powder, water and polyvinyl alcohol, its
Weight is than for 50:50:0.5.
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| CN107200599A (en) * | 2017-06-16 | 2017-09-26 | 深圳市商德先进陶瓷股份有限公司 | Porous alumina ceramic and its preparation method and application |
| CN108911765A (en) * | 2018-07-05 | 2018-11-30 | 山东金璞新材料有限公司 | A method of using flint clay as the artificial synthesized manufacture mullite casting model powder of major ingredient |
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| CN104891960A (en) * | 2015-05-14 | 2015-09-09 | 山东理工大学 | Embedding and sintering method for production of ceramsite from raw material of tile waste |
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| CN107200599A (en) * | 2017-06-16 | 2017-09-26 | 深圳市商德先进陶瓷股份有限公司 | Porous alumina ceramic and its preparation method and application |
| CN108911765A (en) * | 2018-07-05 | 2018-11-30 | 山东金璞新材料有限公司 | A method of using flint clay as the artificial synthesized manufacture mullite casting model powder of major ingredient |
| CN108911765B (en) * | 2018-07-05 | 2021-02-26 | 山东金璞新材料有限公司 | Method for artificially synthesizing and manufacturing mullite casting sand by taking flint clay as main material |
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| CN106396696B (en) | 2019-03-15 |
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