CN109279884A - A kind of high strength cordierite-mullite ceramic roller stick and preparation method thereof - Google Patents
A kind of high strength cordierite-mullite ceramic roller stick and preparation method thereof Download PDFInfo
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- CN109279884A CN109279884A CN201810993043.2A CN201810993043A CN109279884A CN 109279884 A CN109279884 A CN 109279884A CN 201810993043 A CN201810993043 A CN 201810993043A CN 109279884 A CN109279884 A CN 109279884A
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Abstract
The invention discloses a kind of high strength cordierite-mullite ceramic roller stick, primary raw material formulas are as follows: 20-25 parts of ceramic rod waste material；20-25 parts of chlorite, 10-15 parts of kaolin, 10-15 parts of bentonite, 15-20 parts of aluminium oxide, 10-15 parts of kyanite；0.5-3.0 parts of binder；Correspondingly, the invention also discloses the high strength cordierite-mullite ceramic roller stick preparation methods.Ceramic rod of the invention has the characteristics that thermal expansion coefficient is low, intensity is high, solve the problems, such as that traditional dichroite-mullite composite material high production cost, intensity are low, have the function of anti-bending deformation, can be widely applied to ceramic kiln emergency cooling band, there is high promotional value.
Description
Technical field
The invention belongs to kiln furniture material field, more particularly to a kind of high strength cordierite-mullite ceramic roller stick and its
Preparation method.
Background technique
Roller kilns are widely used in the production field of daily, hygienic, architectural pottery, glass and magnetic material etc., roller stick
It is the key component of roller kilns, plays support and transmission product in roller-way calcining kiln and dry kiln, it is to roller kilns
Energy conservation, product firing period and automatic operation have very important influence.
During ceramic firing, especially in the sintering process of Ceramic Tiles, in order to improve yield, usually on kiln
Equipped with chilling band, cooling velocity can generally achieve 100 DEG C/min, under conditions of rapid heat cycle, answer inside ceramic rod
Power can not discharge completely, the defect for the even fracture that easily bends.Therefore chilling band kiln roller stick requires lower heat
The coefficient of expansion and higher intensity.
Currently, Production of Ceramics enterprise roller kilns mostly use the ceramic rod of corundum-mullite matter, thermal expansion coefficient is low,
Poor heat conductivity is not suitable for kiln quench zone.In quench zone, dedicated silicon carbide roller stick is mostly used, mean thermal expansion coefficients can
Reach 4.5 × 10-6/ DEG C, silicon carbide has the advantages that thermal conductivity is high, wear-resisting property is good, High anti bending strength.But its price is higher,
And thermal conductivity is very good is unfavorable for energy conservation, therefore limits it and widely apply in roller kilns.
Cordierite is the silicate mineral with good thermal stability, low thermal coefficient of expansion, and mullite is a kind of good
Refractory material, it has intensity high, and hardness is big, corrosion resistant feature.Dichroite-mullite composite ceramics have intensity high, hot
The low feature of the coefficient of expansion, is also widely used among ceramic kiln.Chinese invention 201310536156.7 discloses one kind
Utilize bentonite tailing, dichroite-mullite stove waste material, sillimanite, chlorite, aluminium oxide, light-weight mullite and wood powder system
The method of standby dichroite-mullite stove, the coefficient of expansion are 2.73 × 10-6/ DEG C, the anti-folding 5.8MPa of high temperature, although its heat is swollen
Swollen coefficient is smaller, but intensity is too low, is far from satisfying the requirement used in ceramic roller kiln chilling area.Patent application
201510975739.9 disclose a kind of inexpensive bending resistance ceramic rod and preparation method thereof, and high temperature break resistant intensity, which has been made, is
38-45MPa, thermal expansion coefficient are 4.2-4.6 × 10-6/ DEG C ceramic rod, but its formula in use cordierite, yttrium oxide
Powder improves the intensity and thermal shock resistance of roller stick, and finished product cordierite powder and yttrium oxide price are higher, are unfavorable for marketing；And
Its firing temperature height (1530-1580 DEG C), consumption energy are more.So needing to research and develop the violet blueness that a kind of production cost is low, intensity is high
Stone-mullite ceramic rod.
Summary of the invention
Technical problem to be solved by the present invention lies in, a kind of high strength cordierite-mullite ceramic rod is provided,
Intensity is high, thermal expansion coefficient is low, anti-bending strength is good, does not deform, is suitable for Urgent Cold Section in Pottery Kiln；And its production cost
It is low.
The technical problems to be solved by the invention also reside in, and provide a kind of above-mentioned high strength cordierite-mullite ceramics
The preparation method of roller stick.
To reach above-mentioned technical effect, the present invention provides a kind of high strength cordierite-mullite ceramic roller stick, according to
Parts by weight meter includes: 20-25 parts of ceramic rod waste material；20-25 parts of chlorite, 10-15 parts of kaolin, 10-15 parts of bentonite,
15-20 parts of aluminium oxide, 10-15 parts of kyanite, 0.5-3.0 parts of binder；
The ceramic rod waste material, chlorite, kaolin, bentonite, aluminium oxide, kyanite parts by weight summation be 100
Part.
As an improvement of the above technical solution, the kaolinic main component are as follows: SiO2Content≤48%, Al2O3Content
>=37%, TiO2And Fe2O3Total content≤1.2%, K2O and Na2Total content≤1.5% of O；Ceramic rod waste material is corundum-
Mullite ceramic rod clinker；Content of MgO >=30% in chlorite；Al in aluminium oxide2O3Content >=99.3%.
As an improvement of the above technical solution, the kaolinic main component are as follows: Al2O3Content >=15% and K2O content
>=5%.
As an improvement of the above technical solution, the bentonite bond strength >=5MPa；The chlorite plasticity index
≥8；The roller stick clinker granularity is 80-120 mesh；The kyanite granularity is 325 mesh screen residue≤8%.
As an improvement of the above technical solution, the binder is cellulose ethers, resin, in calcium lignosulfonate solution
One kind or combination, be added parts by weight be 0.5-3.0 parts.
As an improvement of the above technical solution, the binder is carboxymethyl cellulose, Na2O content < 10%；It adds
Entering parts by weight is 2.4-3.0 parts；The resin is thermosetting phenolic resin, and it is 0.5-1.5 parts that number, which is added,；The lignin
The mass ratio of calcium lignosulfonate and water is 2:3 in sulfonic acid calcium solution；It is 0.5-1.5 parts that number, which is added, in it.
As an improvement of the above technical solution, the resistance to thermal shocks (1100 DEG C-room temperature) of the roller stick >=30 times is not split,
Room temperature bending strength >=55MPa, high temperature bend strength (1100 DEG C) >=45MPa, thermal expansion coefficient are 3.0-3.5 × 10-6/ DEG C
(1000℃)。
Correspondingly, the invention also discloses a kind of above-mentioned high strength cordierite-mullite ceramic roller stick preparation method, packet
It includes:
(1) various raw materials are subjected to ingredient according to formula and are mixed to get mixture；
(2) water is added in the mixture, carries out ball milling, obtains slurry, slurry is spray-dried to obtain blank；
(3) binder and water are added in the blank, carries out granulation more than twice and obtains pug；
(4) pug is squeezed out to obtain the roller blank tube equipped with inner support in plasticity extruder；
(5) the base pipe is dried, moisture control is in 1.2%-2.3% after drying；
(6) the base pipe by being dried is subjected to isostatic cool pressing processing under the pressure of 140-180MPa；
(7) by described after the dry roller blank tube equipped with inner support removes the inner support enter kiln into
Row firing, obtains ceramic rod product；
Wherein, the formula includes: 20-25 parts of ceramic rod waste material in parts by weight；20-25 parts of chlorite, kaolinite
10-15 parts native, 10-15 parts of bentonite, 15-20 parts of aluminium oxide, 10-15 parts of kyanite；
The ceramic rod waste material, chlorite, kaolin, bentonite, aluminium oxide, kyanite parts by weight summation be 100
Part；
Described weight of binder part is 0.5-3.0 parts.
Further, in step (5), drying temperature is 80-120 DEG C；Drying time is 35-40h.
Correspondingly, the invention also discloses another kinds to prepare the high strength cordierite-mullite ceramic roller stick method,
Include:
(1) various raw materials are subjected to ingredient according to formula and are mixed to get mixture；
(2) water is added in the mixture, carries out ball milling, obtains slurry；
(3) slurry is obtained into mud cake by filters pressing；
(4) binder is added in the mud cake, and carries out vacuum pugging more than twice, obtains pug；
(5) pug is squeezed out by vacuum screw extruder, obtains base pipe；
(6) the base pipe is dried, the control of base pipe moisture is ≤1% after drying；
(7) the base pipe after the drying is subjected to high temperature sintering, obtains ceramic rod product；
Wherein, the formula includes: 20-25 parts of ceramic rod waste material in parts by weight；20-25 parts of chlorite, kaolinite
10-15 parts native, 10-15 parts of bentonite, 15-20 parts of aluminium oxide, 10-15 parts of kyanite；
The ceramic rod waste material, chlorite, kaolin, bentonite, aluminium oxide, kyanite parts by weight summation be 100
Part；
Described weight of binder part is 0.5-3.0 parts.
As an improvement of the above technical solution, in step (6), drying temperature is 80-150 DEG C；Drying time is 12-18h.
As an improvement of the above technical solution, in step (7), firing temperature is 1360-1400 DEG C；Sintering period is 28-
32h。
As an improvement of the above technical solution, in step (7), high-sintering process are as follows: first with the speed of 80-100 DEG C/h
By room temperature to 1000-1100 DEG C, 0.5-1h is kept the temperature, then be warming up to 1360-1400 DEG C with the speed of 30-50 DEG C/h, heat preservation
1-7h is finally cooled to room temperature with the speed of 200-500 DEG C/h.
The present invention provides a kind of high strength cordierite-mullite ceramic roller stick, primary raw material be kaolin, bentonite,
Chlorite, kyanite and aluminium oxide；Simultaneously include a certain amount of ceramic rod waste material, using etc. static pressure or extrusion molding process
Preparation, the beneficial effects of the practice of the present invention are specific as follows:
1. the present invention has introduced ceramic rod waste material in formula, recycling for waste is realized, can effectively reduce
Production cost.
2. by reasonably formula design, using chlorite with kyanite the synthesis of dichroite phase under middle cryogenic conditions, really
The formula system of low thermal coefficient of expansion is determined.
3. introducing kaolin and aluminium oxide in formula for the lower problem of intensity；So that kaolin point under high temperature
Solution obtains acicular mullite phase, and forms mullite phase with oxidation reactive aluminum, is compound among cordierite phase, improves compound phase
Intensity makes its anti-bending strength have big upgrade.
4. introduce the bentonite of high-ductility in formula, in formative stage, bentonite with binder is compound improves mud
The processability of material；In sintering process, needle-shaped secondary mullite is formed in oxidation reactive aluminum after bentonite pyrolytic, is improved
The intensity of product.
5. using isostatic pressing mode, base pipe consistency is improved, firing intensity is improved.
Detailed description of the invention
Fig. 1 is a kind of flow chart of high strength cordierite-mullite ceramic rod preparation method of the present invention.
Fig. 2 is a kind of flow chart of high strength cordierite-another preparation method of mullite ceramic rod of the present invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, and
It is not used in the restriction present invention.
The present invention provides a kind of inexpensive furnace dichroite-mullite ceramic rods, wrap in parts by weight
It includes: 20-25 parts of ceramic rod waste material, 20-25 parts of chlorite, 10-15 parts of kaolin, 10-15 parts of bentonite, aluminium oxide 15-20
Part, 10-15 parts of kyanite；
Above-mentioned ceramic rod waste material, chlorite, kaolin, bentonite, aluminium oxide, kyanite parts by weight summation be 100
Part；
Described weight of binder part is 0.5-3.0 parts,
Wherein, kaolinic main component are as follows: SiO2Content≤48%, Al2O3Content >=37%, TiO2And Fe2O3It is total
Content≤1.2%, K2O and Na2Total content≤1.5% of O；Al in aluminium oxide2O3Content >=99.3%.Kaolin was heating up
Cheng Zhong can largely be decomposed to form metakaolinite and free cristobalite, and when further increasing temperature, metakaolinite is precipitated at acicular
Secondary mullite helps to improve product strength；Decomposing the obtained higher cristobalite of activity simultaneously can be anti-with partial oxidation aluminium
Mullite should be formed, product strength is improved.Preferably, novel kaolin, main component also can be used in the present invention are as follows: Al2O3
Content >=15% and K2O content >=5%.
Ceramic rod waste material is corundum-mullite matter ceramic rod clinker；Its granularity is controlled in 80-120 mesh.Preferably,
The ceramic rod waste material is sorted, removal of impurities, crushes, is sieved, except obtained after iron.Addition roller rod waste material not only realizes waste
It recycles, reduces production cost；And ceramic rod waste material can also provide mullite phase in sintering process, improve roller stick
Intensity.
Content of MgO >=30% in chlorite, plasticity index >=8；In temperature-rise period, chlorite is decomposed to form stupid fire
Pyroxene peomotes sintering, while between 1000-1100 DEG C, and enstatite can react to form violet blueness with kyanite
Stone.Preferably, for intensified response activity, the kyanite granularity control is in 325 mesh screen residue≤8%.
Meanwhile in substrate material, also contain a certain amount of bentonite, bentonite has extremely strong plasticity, can enhance base
The processability of body；Preferably, in the present invention, bentonitic bond strength >=5MPa.Bentonite decomposes in temperature-rise period
Intermediate product is formed, intermediate product can form mullite with oxidation reactive aluminum after 1200 DEG C, promote the intensity of product.
Binder is one of cellulose ethers, resin, calcium lignosulfonate solution or combination, and parts by weight, which are added, is
0.5-3.0 parts；Preferably, the cellulose ethers are carboxymethyl cellulose, in carboxylic propyl methocel, methylcellulose
One or more, it is 2.4-3.0 parts that parts by weight, which are added,.It is further preferred that the binder is carboxymethyl cellulose,
Na2O content is less than 10%；It is 2.4-3.0 parts that parts by weight, which are added, in it；Preferably, the resin is thermosetting phenolic resin, is added
Entering number is 0.5-1.5 parts；The mass ratio of calcium lignosulfonate and water is 2:3 in the calcium lignosulfonate solution；It is added
Number is 0.5-1.5 parts.
Correspondingly, as shown in Figure 1, the present invention also provides a kind of inexpensive furnace dichroite-mullite ceramic rollers
The method of stick, comprising:
S101: various raw materials are subjected to ingredient according to formula and are mixed to get mixture.
Wherein, the formula includes: 20-25 parts of ceramic rod waste material in parts by weight；20-25 parts of chlorite, kaolinite
10-15 parts native, 10-15 parts of bentonite, 15-20 parts of aluminium oxide, 10-15 parts of kyanite；
The ceramic rod waste material, chlorite, kaolin, bentonite, aluminium oxide, kyanite parts by weight summation be 100
Part；
Described weight of binder part is 0.5-3.0 parts.
S102: being added water in the mixture, carries out ball milling, obtains slurry, slurry is spray-dried to obtain base
Material；
The mechanical milling process includes: that ball milling obtains slurry in the ball mill after 29-37 parts of water of addition in mixture；Slurry
It carried out screening out iron processing；The slurry crossed after screening out iron is spray-dried, and blank is obtained.It crosses and screens out iron and can effectively remove slurry
The impurity of material improves the yield rate of roller rod product.
S103: being added binder and water in the blank, carries out granulation more than twice and obtains pug；
Wherein, binder is one of carboxymethyl cellulose, carboxylic propyl methocel, methylcellulose or combines,
It is 2.4-3.0 parts that parts by weight, which are added, in it.Preferably, the binder is carboxymethyl cellulose, Na2O content is less than 10%；Its
It is 2.4-3.0 parts that parts by weight, which are added,；
Preferably, the step specifically: after binder is added in blank, first dry-mixed 4-10 minutes, then add
Water carries out wet mixing；Water is added and carries out strong stirring, the moisture for obtaining pug is controlled in 14-20%.
S104: the pug is extruded into the roller blank tube equipped with inner support in direct-push plasticity extruder；
S105: the base pipe is dried, and moisture control is in 1.2%-2.3% after drying；
Wherein, drying temperature is 80-120 DEG C；Drying time is 35-40h.
S106: the base pipe by being dried is subjected to isostatic cool pressing processing under the pressure of 140-180MPa；
It can further improve the consistency of roller blank tube using isostatic pressing, so that its bulk density >=2.5g/
cm3；The higher ceramic rod of intensity can be obtained in sintering process.
S107: enter kiln after the dry roller blank tube equipped with inner support removes the inner support for described
It is burnt into, obtains ceramic rod product；
Wherein, the technological parameter of firing are as follows: firing temperature is 1360-1400 DEG C；Sintering period is 28-32h.Preferably,
The sintering process of ceramic rod in the present invention specifically: first with the speed of 80-100 DEG C/h by room temperature to 1000-1100 DEG C,
0.5-1h is kept the temperature, then is warming up to 1360-1400 DEG C with the speed of 30-50 DEG C/h, 1-7h is kept the temperature, finally with 200-500 DEG C/h's
Speed is cooled to room temperature.
Referring to fig. 2, following methods preparation also can be used in high strength cordierite-mullite ceramic rod in the present invention:
S101: various raw materials are subjected to ingredient according to formula and are mixed to get mixture；
Wherein, the formula includes: 20-25 parts of ceramic rod waste material in parts by weight；20-25 parts of chlorite, kaolinite
10-15 parts native, 10-15 parts of bentonite, 15-20 parts of aluminium oxide, 10-15 parts of kyanite；
Ceramic rod waste material, chlorite, kaolin, bentonite, aluminium oxide, kyanite parts by weight summation be 100 parts；
S102: being added water in the mixture, carries out ball milling, obtains slurry；
Wherein, mechanical milling process specifically includes: that ball milling is starched in the ball mill after 29-37 parts of water of addition in mixture
Material；Slurry was carried out to screen out iron processing；It crosses and screens out iron and can effectively remove impurity in slurry, improve the finished product of roller rod product
Rate.
S103: the mistake is screened out into after iron slurry, mud cake is obtained by filters pressing；
S104: bonding agent is added in the mud cake, and carries out vacuum pugging more than twice, obtains pug；
Wherein, bonding agent is one of resin, calcium lignosulfonate solution or combination；Preferably, resin is thermosetting property
Phenolic resin, it is 0.5-1.5 parts that number, which is added,；The mass ratio of calcium lignosulfonate and water is 2 in calcium lignosulfonate solution:
3；It is 0.5-1.5 parts that number, which is added, in it.
The step further includes, and after vacuum pugging, the aging processing of 24-48h is carried out to pug, obtains pug.It is aging
Processing can effectively increase the plasticity of pug, facilitate molding.
S105: the pug is squeezed out by vacuum screw extruder, obtains base pipe；
S106: the base pipe is dried, and the control of base pipe moisture is ≤1% after drying；
Wherein, the process conditions of drying process are as follows: drying temperature is 80-150 DEG C；Drying time is 12-18h；Preferably,
Base pipe moisture≤0.8% after drying.
S107: the base pipe after the drying is subjected to high temperature sintering, obtains ceramic rod product；
Specifically, the high temperature sintering temperature of ceramic rod is 1360-1400 DEG C, sintering period 28-32h in the present invention；
Preferably, in the present invention ceramic rod specific sintering process are as follows: first with the speed of 80-100 DEG C/h by room temperature to 1000-
1100 DEG C, 0.5-1h is kept the temperature, then be warming up to 1360-1400 DEG C with the speed of 30-50 DEG C/h, 1-7h is kept the temperature, finally with 200-500
DEG C/speed of h is cooled to room temperature.
The ceramic rod finished product as made from above-mentioned formula and method, resistance to thermal shocks (1100 DEG C-room temperature) >=30 times
It does not split, room temperature bending strength >=55MPa, high temperature bend strength (1100 DEG C) >=45MPa, thermal expansion coefficient is 3.0-3.5 × 10-
6/℃(1000℃).The roller stick have thermal expansion coefficient is low, intensity is high, bending resistance is strong, efficiently solve roller stick in roller kilns
Quench zone due to temperature gradient greatly caused by problem on deformation.
With specific embodiment, the present invention is furture elucidated below:
Embodiment 1
(1) it is formulated
21 parts of roller stick clinker, 12 parts of kaolin, 15 parts of bentonite, 21 parts of chlorite, 18 parts of alumina powder, kyanite 13
Part；2.9 parts of carboxymethyl celluloses.
Wherein, kaolin main component are as follows: SiO2For 47.15%, Al2O3It is 37.15%；Its Fe2O3+TiO2Content is
0.33%；Content of MgO is 31% in chlorite.
(2) preparation method
(1) various raw materials are subjected to ingredient according to formula and are mixed to get mixture；
(2) 35 parts of water are added in the mixture, carry out ball milling, sieving is carried out after ball milling except iron, slurry is obtained, will starch
Material is spray-dried to obtain blank；
(3) 2.9 parts of carboxymethyl celluloses are added in the blank, dry-mixed 6 minutes, 16 parts of water are then added, carry out three
Pug is obtained after secondary granulation；
(4) pug is squeezed out to obtain the roller blank tube equipped with inner support in plasticity extruder；
(5) the base pipe is dried into 37h at 110 DEG C, be dried, moisture control is in 1.2%-1.6% after drying；
(6) the base pipe by being dried is subjected to isostatic cool pressing processing under the pressure of 170-180MPa；
(7) it is hung described in kiln after the dry roller blank tube equipped with inner support removes the inner support
Dress sintering, 1370 DEG C of sintering temperature, sintering period 31h.
Embodiment 2
(1) it is formulated
20 parts of roller stick clinker, 12 parts of kaolin, 15 parts of bentonite, 21 parts of chlorite, 18 parts of alumina powder, kyanite 13
Part；2.6 parts of carboxymethyl celluloses.
Wherein, kaolin main component are as follows: 45.40%, Al2O3It is 38.19%；Its Fe2O3+TiO2Content is 0.25%；
Content of MgO is 31% in chlorite.
(2) preparation method
(1) various raw materials are subjected to ingredient according to formula and are mixed to get mixture；
(2) 29 parts of water are added in the mixture, carry out ball milling, sieving is carried out after ball milling except iron, slurry is obtained, will starch
Material is spray-dried to obtain blank；
(3) 2.6 parts of carboxymethyl celluloses are added in the blank, dry-mixed 5 minutes, 17 parts of water are then added, carry out three
Pug is obtained after secondary granulation；
(4) pug is squeezed out to obtain the roller blank tube equipped with inner support in plasticity extruder；
(5) the base pipe is dried into 40h at 100 DEG C, be dried, moisture control is in 1.2%-1.6% after drying；
(6) the base pipe by being dried is subjected to isostatic cool pressing processing under the pressure of 140-150MPa；
(7) it is hung described in kiln after the dry roller blank tube equipped with inner support removes the inner support
Dress sintering, 1375 DEG C of sintering temperature, sintering period 32h.More specifically, sintering schedule are as follows: with 100 DEG C/h of speed by
Room temperature keeps the temperature 1h to 1000 DEG C；1375 DEG C are warming up to 30 DEG C of speed again, keeps the temperature 5 hours.Then with 300 DEG C/h
Speed be cooled to room temperature.
Embodiment 3
(1) it is formulated
21 parts of roller stick clinker, 12 parts of kaolin, 15 parts of bentonite, 21 parts of chlorite, 18 parts of alumina powder, kyanite 13
Part；2.5 parts of carboxy-propyl celluloses.
Wherein, kaolin main component are as follows: 47.22%, Al2O3It is 36.14%；Its Fe2O3+TiO2Content is 0.43%；
Content of MgO is 32% in chlorite.
(2) preparation method
(1) various raw materials are subjected to ingredient according to formula and are mixed to get mixture；
(2) 34 parts of water are added in the mixture, carry out ball milling, sieving is carried out after ball milling except iron, slurry is obtained, will starch
Material is spray-dried to obtain blank；
(3) 2.5 parts of carboxy-propyl celluloses are added in the blank, dry-mixed 6 minutes, 16 parts of water are then added, carry out three
Pug is obtained after secondary granulation；
(4) pug is squeezed out to obtain the roller blank tube equipped with inner support in plasticity extruder；
(5) the base pipe is dried into 35h at 120 DEG C, be dried, moisture control is in 1.2%-1.6% after drying；
(6) the base pipe by being dried is subjected to isostatic cool pressing processing under the pressure of 170-180MPa；
(7) it is hung described in kiln after the dry roller blank tube equipped with inner support removes the inner support
Dress sintering, 1370 DEG C of sintering temperature, sintering period 31h.More specifically, sintering schedule are as follows: with 100 DEG C/h of speed by
Room temperature keeps the temperature 0.5h to 1000 DEG C；1370 DEG C are warming up to 40 DEG C of speed again, keeps the temperature 5 hours.Then with 300 DEG C/it is small
When speed be cooled to room temperature.
Embodiment 4
(1) it is formulated
23 parts of roller stick clinker, 11 parts of kaolin, 13 parts of bentonite, 22 parts of chlorite, 17 parts of alumina powder, kyanite 14
Part；3.0 parts of carboxymethyl celluloses.
(2) preparation method
(1) various raw materials are subjected to ingredient according to formula and are mixed to get mixture；
(2) 35 parts of water are added in the mixture, carry out ball milling, sieving is carried out after ball milling except iron, slurry is obtained, will starch
Material is spray-dried to obtain blank；
(3) 3.0 parts of carboxymethyl celluloses are added in the blank, dry-mixed 6 minutes, 18 parts of water are then added, carry out three
Pug is obtained after secondary granulation；
(4) pug is squeezed out to obtain the roller blank tube equipped with inner support in plasticity extruder；
(5) the base pipe is dried into 40h at 80 DEG C, be dried, moisture control is in 1.2%-1.4% after drying；
(6) the base pipe by being dried is subjected to isostatic cool pressing processing under the pressure of 170-180MPa；
(7) it is hung described in kiln after the dry roller blank tube equipped with inner support removes the inner support
Dress sintering, 1380 DEG C of sintering temperature, sintering period 32h.
Embodiment 5
(1) it is formulated
20 parts of roller stick clinker, 15 parts of kaolin, 15 parts of bentonite, 20 parts of chlorite, 20 parts of alumina powder, kyanite 10
Part；0.5 part of calcium lignosulfonate solution.
(2) preparation method
(1) raw material is mixed in high-speed mixer according to formula；
(2) 37 parts of water are added in mixture, and ball mill is added, sieving is carried out after ball milling except iron handles to obtain slurry；
(3) slurry described in filters pressing obtains the mud cake that moisture content is 17%；
(4) 0.5 part of lignosulfonic acid calcium solution is added in mud cake, and carries out pugging more than twice, aging 48h after pugging；
(5) pug is squeezed out by vacuum screw extruder, obtains base pipe；
(6) the base pipe is dried to 16h at 140 DEG C, base pipe moisture is 0.5% after drying；
(7) the base pipe after the drying is subjected to high temperature sintering, obtains ceramic rod product；Its firing temperature is 1370
DEG C, firing period 32h.
Embodiment 6
(1) it is formulated
(1) it is formulated
25 parts of roller stick clinker, 11 parts of kaolin, 11 parts of bentonite, 25 parts of chlorite, 13 parts of alumina powder, kyanite 15
Part；1.3 parts of calcium lignosulfonate solutions.
(2) preparation method
(1) raw material is mixed in high-speed mixer according to formula；
(2) 35 parts of water are added in mixture, and ball mill is added, sieving is carried out after ball milling except iron handles to obtain slurry；
(3) slurry described in filters pressing obtains the mud cake that moisture content is 17%；
(4) 1.3 parts of lignosulfonic acid calcium solutions are added in mud cake, and carry out pugging more than twice, aging 48h after pugging；
(5) pug is squeezed out by vacuum screw extruder, obtains base pipe；
(6) the base pipe is dried to 16h at 140 DEG C, base pipe moisture is 0.3% after drying；
(7) the base pipe after the drying is subjected to high temperature sintering, obtains ceramic rod product；Its firing temperature is 1360
DEG C, firing period 32h.
The resulting ceramic rod of embodiment 1-6 is detected, as a result as follows:
To sum up, the ceramic rod in the present invention, resistance to thermal shocks (1100 DEG C-room temperature) >=30 times are not split, and room temperature is curved
Qu Qiangdu >=55MPa, high temperature bend strength (1100 DEG C) >=45MPa, thermal expansion coefficient are 3.0-3.5 × 10-6/ DEG C (1000
℃).The roller stick have thermal expansion coefficient is low, intensity is high, bending resistance is strong, efficiently solve roller stick roller kilns quench zone due to
Temperature gradient problem on deformation caused greatly.
The foregoing is merely preferred embodiments of the invention, are not intended to limit the invention, all in spirit of the invention
With any modification affected within principle, equivalent replacement and improvement etc. be should all be included in the protection scope of the present invention.
Claims (13)
1. a kind of high strength cordierite-mullite ceramic roller stick, which is characterized in that in parts by weight include: ceramic rod
20-25 parts of waste material；20-25 parts of chlorite, 10-15 parts of kaolin, 10-15 parts of bentonite, 15-20 parts of aluminium oxide, kyanite 10-
15 parts, 0.5-3.0 parts of binder；
The ceramic rod waste material, chlorite, kaolin, bentonite, aluminium oxide, kyanite parts by weight summation be 100 parts.
2. high strength cordierite as described in claim 1-mullite ceramic roller stick, which is characterized in that the kaolinic master
Want ingredient are as follows: SiO2Content≤48%, Al2O3Content >=37%, TiO2And Fe2O3Total content≤1.2%, K2O and Na2O's is total
Content≤1.5%；Ceramic rod waste material is corundum-mullite matter ceramic rod clinker；Content of MgO >=30% in chlorite；Oxygen
Change Al in aluminium2O3Content >=99.3%.
3. high strength cordierite as described in claim 1-mullite ceramic roller stick, which is characterized in that the kaolinic master
Want ingredient are as follows: Al2O3Content >=15% and K2O content >=5%.
4. high strength cordierite as claimed in claim 2-mullite ceramic roller stick, which is characterized in that the bentonite combines
Intensity >=5MPa；Chlorite plasticity index >=8；The roller stick clinker granularity is 80-120 mesh；The kyanite granularity
For 325 mesh screen residue≤8%.
5. high strength cordierite as described in claim 1-mullite ceramic roller stick, which is characterized in that the binder is fibre
One of plain ethers, resin, calcium lignosulfonate solution or combination are tieed up, it is 0.5-3.0 parts that parts by weight, which are added,.
6. high strength cordierite as claimed in claim 5-mullite ceramic roller stick, which is characterized in that the binder is carboxylic
Methylcellulose, Na2O content < 10%；It is 2.4-3.0 parts that parts by weight, which are added, in it；The resin is thermosetting phenolic resin,
It is 0.5-1.5 parts that number, which is added, in it；The mass ratio of calcium lignosulfonate and water is 2:3 in the calcium lignosulfonate solution；Its
It is 0.5-1.5 parts that number, which is added,.
7. high strength cordierite as claimed in any one of claims 1 to 6-mullite ceramic roller stick, which is characterized in that the roller
The resistance to thermal shocks (1100 DEG C-room temperature) of stick >=30 times is not split, room temperature bending strength >=55MPa, high temperature bend strength (1100
DEG C) >=45MPa, thermal expansion coefficient is 3.0-3.5 × 10-6/ DEG C (1000 DEG C).
8. a kind of prepare the described in any item high strength cordierites of claim 1-7-mullite ceramic roller stick method, feature
It is, comprising:
(1) various raw materials are subjected to ingredient according to formula and are mixed to get mixture；
(2) water is added in the mixture, carries out ball milling, obtains slurry, slurry is spray-dried to obtain blank；
(3) binder and water are added in the blank, carries out granulation more than twice and obtains pug；
(4) pug is squeezed out to obtain the roller blank tube equipped with inner support in plasticity extruder；
(5) the base pipe is dried, moisture control is in 1.2%-2.3% after drying；
(6) the base pipe by being dried is subjected to isostatic cool pressing processing under the pressure of 140-180MPa；
(7) enter kiln after the dry roller blank tube equipped with inner support removes the inner support for described and carry out height
Temperature sintering, obtains ceramic rod product；
Wherein, the formula includes: 20-25 parts of ceramic rod waste material in parts by weight；20-25 parts of chlorite, kaolin 10-
15 parts, 10-15 parts of bentonite, 15-20 parts of aluminium oxide, 10-15 parts of kyanite；
The ceramic rod waste material, chlorite, kaolin, bentonite, aluminium oxide, kyanite parts by weight summation be 100 parts；
Described weight of binder part is 0.5-3.0 parts.
9. a kind of prepare the described in any item high strength cordierites of claim 1-7-mullite ceramic roller stick method, feature
It is, comprising:
(1) various raw materials are subjected to ingredient according to formula and are mixed to get mixture；
(2) water is added in the mixture, carries out ball milling, obtains slurry；
(3) slurry is obtained into mud cake by filters pressing；
(4) binder is added in the mud cake, and carries out vacuum pugging more than twice, obtains pug；
(5) pug is squeezed out by vacuum screw extruder, obtains base pipe；
(6) the base pipe is dried, the control of base pipe moisture is ≤1% after drying；
(7) the base pipe after the drying is subjected to high temperature sintering, obtains ceramic rod product；
Wherein, the formula includes: 20-25 parts of ceramic rod waste material in parts by weight；20-25 parts of chlorite, kaolin 10-
15 parts, 10-15 parts of bentonite, 15-20 parts of aluminium oxide, 10-15 parts of kyanite；
The ceramic rod waste material, chlorite, kaolin, bentonite, aluminium oxide, kyanite parts by weight summation be 100 parts；
Described weight of binder part is 0.5-3.0 parts.
10. preparing high strength cordierite-mullite ceramic roller stick method as claimed in claim 8, which is characterized in that step
(5) in, drying temperature is 80-120 DEG C；Drying time is 35-40h.
11. preparing high strength cordierite-mullite ceramic roller stick method as claimed in claim 9, which is characterized in that step
(6) in, drying temperature is 80-150 DEG C；Drying time is 12-18h.
12. preparing high strength cordierite-mullite ceramic roller stick method as claimed in claim 8 or 9, which is characterized in that
In step (7), sintering temperature is 1360-1400 DEG C；Sintering period is 28-32h.
13. preparing high strength cordierite-mullite ceramic club method as claimed in claim 11, which is characterized in that step
Suddenly in (7), high-sintering process are as follows: the first speed with 80-100 DEG C/h, to 1000-1100 DEG C, keeps the temperature 0.5- by room temperature
1h, then it is warming up to 1360-1400 DEG C with the speed of 30-50 DEG C/h, 1-7h is kept the temperature, is finally cooled down with the speed of 200-500 DEG C/h
To room temperature.
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Address after: Original Changjiang carton factory, Guanyao Dalan Industrial Zone, Shishan town, Nanhai District, Foshan City, Guangdong Province Applicant after: GUANGDONG JINGANG NEW MATERIAL Co.,Ltd. Applicant after: Foshan Ceramic Research Institute Group Co.,Ltd. Address before: Original Changjiang carton factory, Guanyao Dalan Industrial Zone, Shishan town, Nanhai District, Foshan City, Guangdong Province Applicant before: GUANGDONG JINGANG NEW MATERIAL Co.,Ltd. Applicant before: FOSHAN CERAMIC RESEARCH INSTITUTE Co.,Ltd. |
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Address after: Original Changjiang carton factory, Guanyao Dalan Industrial Zone, Shishan town, Nanhai District, Foshan City, Guangdong Province Applicant after: GUANGDONG JINGANG NEW MATERIAL CO.,LTD. Applicant after: Guangdong Foshan Ceramic Research Institute Holding Group Co.,Ltd. Address before: Original Changjiang carton factory, Guanyao Dalan Industrial Zone, Shishan town, Nanhai District, Foshan City, Guangdong Province Applicant before: GUANGDONG JINGANG NEW MATERIAL CO.,LTD. Applicant before: Foshan Ceramic Research Institute Group Co.,Ltd. |
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Effective date of registration: 20230724 Address after: 528000 No. 18, Huiyuan Road, Chancheng District, Foshan City, Guangdong Province Patentee after: Guangdong Foshan Ceramic Research Institute Holding Group Co.,Ltd. Address before: Original Changjiang carton factory, Guanyao Dalan Industrial Zone, Shishan town, Nanhai District, Foshan City, Guangdong Province Patentee before: GUANGDONG JINGANG NEW MATERIAL CO.,LTD. Patentee before: Guangdong Foshan Ceramic Research Institute Holding Group Co.,Ltd. |