CN1268397A - Method for producing cordierite cellular carrier using extrusion method - Google Patents
Method for producing cordierite cellular carrier using extrusion method Download PDFInfo
- Publication number
- CN1268397A CN1268397A CN 99104200 CN99104200A CN1268397A CN 1268397 A CN1268397 A CN 1268397A CN 99104200 CN99104200 CN 99104200 CN 99104200 A CN99104200 A CN 99104200A CN 1268397 A CN1268397 A CN 1268397A
- Authority
- CN
- China
- Prior art keywords
- extrudes
- mixture
- cordierite
- extrude
- extruding
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 10
- 229910052878 cordierite Inorganic materials 0.000 title claims description 28
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 title claims description 28
- 230000001413 cellular effect Effects 0.000 title claims description 16
- 238000001125 extrusion Methods 0.000 title 1
- 239000000203 mixture Substances 0.000 claims abstract description 24
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 claims abstract description 16
- 235000013312 flour Nutrition 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000004927 clay Substances 0.000 claims abstract description 8
- 229910052570 clay Inorganic materials 0.000 claims abstract description 8
- 235000011187 glycerol Nutrition 0.000 claims abstract description 8
- 229920000609 methyl cellulose Polymers 0.000 claims abstract description 8
- 239000001923 methylcellulose Substances 0.000 claims abstract description 8
- 235000010981 methylcellulose Nutrition 0.000 claims abstract description 8
- 239000000454 talc Substances 0.000 claims abstract description 8
- 229910052623 talc Inorganic materials 0.000 claims abstract description 8
- 241000209140 Triticum Species 0.000 claims abstract description 7
- 235000021307 Triticum Nutrition 0.000 claims abstract description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000004898 kneading Methods 0.000 claims abstract description 5
- 239000000919 ceramic Substances 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 25
- 238000012360 testing method Methods 0.000 claims description 13
- 238000002360 preparation method Methods 0.000 claims description 8
- 235000012222 talc Nutrition 0.000 claims description 7
- 238000012545 processing Methods 0.000 claims description 4
- 238000007872 degassing Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 abstract description 8
- 239000011020 iolite Substances 0.000 abstract 2
- 239000011268 mixed slurry Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 12
- 239000011230 binding agent Substances 0.000 description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 5
- 238000002474 experimental method Methods 0.000 description 4
- 239000004372 Polyvinyl alcohol Substances 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 3
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 description 3
- 229920002451 polyvinyl alcohol Polymers 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000000429 assembly Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 2
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 229910002804 graphite Inorganic materials 0.000 description 2
- 239000010439 graphite Substances 0.000 description 2
- 239000000314 lubricant Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 239000004014 plasticizer Substances 0.000 description 2
- 229910052903 pyrophyllite Inorganic materials 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- 240000003183 Manihot esculenta Species 0.000 description 1
- 235000016735 Manihot esculenta subsp esculenta Nutrition 0.000 description 1
- 239000002202 Polyethylene glycol Substances 0.000 description 1
- 229920002472 Starch Polymers 0.000 description 1
- 235000021355 Stearic acid Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 description 1
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 description 1
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 description 1
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical compound OC1C(O)C(OC)OC(CO)C1OC1C(O)C(O)C(OC2C(C(O)C(OC3C(C(O)C(O)C(CO)O3)O)C(CO)O2)O)C(CO)O1 UFVKGYZPFZQRLF-UHFFFAOYSA-N 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- -1 magnesium aluminate Chemical class 0.000 description 1
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
- 239000001095 magnesium carbonate Substances 0.000 description 1
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 description 1
- 229920001223 polyethylene glycol Polymers 0.000 description 1
- 235000019422 polyvinyl alcohol Nutrition 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000000518 rheometry Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 239000008107 starch Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000008117 stearic acid Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 229940100445 wheat starch Drugs 0.000 description 1
Images
Landscapes
- Press-Shaping Or Shaping Using Conveyers (AREA)
- Compositions Of Oxide Ceramics (AREA)
Abstract
The present invention relates to a method for producing iolite honeycomb structure carrier, which includes the following steps: (a) mix talc, clay and alumina in a tatch of mixers for closely mixing so as to obtain a mixture of iolite; (b) mix methyl cellulose, glycerin, wheat flour and water into the above mentioned mixture in the said mixerl; (c) degas the mixed slurry and extrude into stick-shaped form; (d) treat the mixture in a kneading machine to obtain degassed blank; (e) extrude the degased blank into honeycomb structure body; (f) it is kiln dried and calcined in a furnace at a temp. between 1330-1420 deg.C, according to the requirement of porosity and mechanical property.
Description
The present invention relates to by extruding the method for production cordierite honeycomb carrier.By way of example but be not limited to institute and give an actual example, described cordierite ceramic honeycomb shape carrier is suitable to catalytic converter.
Present invention is specifically related to the scientific process that is used for the continuous extruded honeycomb support and obtains the rheological parameter that extrudes pug.
Till now, the composition that extrudes pug does not disclose known in this area, and, also unexposed any method that can obtain qualified composition.Obviously, the composition that uses in these extrustion process obtains by spline fit method.
In the prior art, people know that the honeycomb ceramics material is formed by squeezable material by using conventional honeycomb die, and this material is directly delivered to the mutual cross section of the blow tank network of interconnection by a polynary feeding-passage.
People know that also the chemical formula of pure cordierite is 2MgO2Al
2O
35SiO
2, contain 13.8% MgO, 51.3% SiO
2And 34.9% Al
2O
3Thereby single-phase pure cordierite can obtain by selecting raw material, as clay (Al
2O
3And SiO
2Main source), talcum (MgO and SiO
2Main source), silica, magnesium aluminate, magnesium carbonate, pyrophyllite, vanadine etc., the corresponding ratio of these raw materials can calculate by each chemical composition of every kind of raw material.
In the prior art, people also know, above-mentioned inorganic component in batches can mix with the organic component that has respective action separately and obtains the pug that can extrude.Organic component can be an organic binder bond, for example methylcellulose, carboxymethyl cellulose, hydroxypropyl methylcellulose, polyvinyl alcohol, starch, wheat flour etc., also can be plastic agent and surfactant, as glycerine, wax, odium stearate, graphite etc., or other material such as activated carbon, starch flour and sawdust are used to regulate as hole and form and the character of honeycomb ceramics such as control pore-size.
In the prior art, be suitable for the characteristic that extrudes pug that ceramic honeycomb body extrudes and also do not know.The characteristic of squeezable pug is some parameters, these parameters have determined under the obtainable power or pressure of reality, pug flows by the honeycomb ceramics press molds, can keep complicated thin-walled shape after extruding immediately, and its lateral flow is connected to each other constitute overall structure together.The characteristic that can extrude pug is similar to the shear thinning fluid type.Yet, also do not have the open accurate numerical value that any successful ceramic honeycomb body is extruded those characterisitic parameters that play a decisive role.Up to the present in disclosed all known technologies, the pug that honeycomb ceramics extrudes is called as and can extrudes, and use spline fit method by use binding agent and additive to obtain suitable bonding, plasticising, lubricated and other characteristic is prepared.Thereby, lack being suitable for determining of pug desirable characteristics that ceramic honeycomb body extrudes.
An object of the present invention is to provide a kind of pug that extrudes, this pug that extrudes is advantageous when being used for honeycomb ceramics and extruding, and has to be suitable for quality and productive rate stable and the repeatably rheological behavior that extrudes of honeycomb ceramics.
Another object of the present invention provides the method that a kind of preparation has the cordierite ceramic pug of the desired rheological parameter that the honeycomb ceramics that is used to carry out success extrudes.
Yet another purpose of the present invention provides by extruding the cordierite honeycomb carrier of production, and this cordierite carrier has stabilized quality and high yield is suitable for using in the catalytic converter of the automobile that uses fossil fuel.
According to the present invention, provide and adopt predetermined rheological parameter to extrude the method for producing the cordierite honeycomb carrier, this method may further comprise the steps: a) talcum, clay and alumina are closely mixed in batch mixer to obtain to form the mixture of cordierite; B) in blender, in described mixture, add methylcellulose, glycerine, wheat flour and water and mixing; C) the degassing of the pug that mixes and extrude into coupon and be used for follow-up rheological test; D) mixture of processing in pugging mill through kneading, the blank that obtains outgasing; E) blank of the degassing being sent to extruding machine carries out honeycomb ceramics and extrudes; F) oven dry cellular extrude body and be placed in the stove of temperature between 1350 ℃ to 1420 ℃ fire, temperature is decided by the requirement of porosity and mechanical strength.Fig. 1 shows the flow chart of the method for preparing ceramic honeycomb body; Fig. 2, the perpendicular case form of 3 usefulness shows that six according to different experiment batch extrude parameter; Fig. 4 is a character of showing the honeycomb ceramics that adopts described new method preparation.
According to the present invention, there is a kind of method, can determine scientifically that the composition that can extrude the cordierite pug obtains desirable rheological parameter, successfully obtaining the greatly improved cellular body that extrudes, and have high yield.The flow chart of the improved method of the preparation of ceramic honeycomb body is presented at Fig. 1 according to the present invention.Thereby with due importance, these parameters are used various compositions and system obtains for the following rheological parameter that provides in the present invention, and these compositions can obtain from local mineral resources, plasticizer, binding agent, lubricant and synthetic material.
Pottery cordierite pug rheological parameter parameter symbol desired value 1. yield stress σ
00.15 go into mould speed alpha 0.001 to 0.07MPa sensitivity coefficient (mm/min) to 0.35MPa2.
m3. go into the maximum 0.44. shear stress of mould parameter m τ
00.001 to 0.002MPa5. demoulding speed β 0.001 to 0.02MPa sensitivity coefficient (mm/min)
n6. demoulding parameter n maximum 0.45
For the rheological parameter of determining to produce cordierite ceramic honeycomb shape carrier that extrudes pug, honeycomb support is extruded shape for studying in great detail with the viewpoint of Science and Technology by extruding.Using the plunger type extruding machine of routine as known in the art to carry out a large amount of honeycomb ceramics extrudes.Extruding in the circulation at every turn, recording rheological parameter and write down corresponding honeycomb member by match 6-parameter Mathematical Modeling and extrude the result.Thereby by the described model of match, the shape that can quantize pug is, is expressed as the R1-square value corresponding to the fitting degree of this curve.By a series of experiments, obtained to constitute the number range of each rheological parameter of 6-parameter Mathematical Modeling, these are that to obtain the cellular body that extrudes of high-quality desired.Following embodiment provides example of these values.
Further, the processing procedure that is used to the ceramic material that extrudes will very accurately be controlled the cellular body that extrudes that obtains high-quality.Sometimes,, not have to obtain the result that should obtain even through the control of very accurate and careful technical process, the promptly flawless cellular body that extrudes, unless since season or other variation process conditions change.For example, if the temperature and humidity in production process place there are differences, thereby powder stock thin in the preparation process more or less absorbs water, changes the pug overall moisture content like this, thereby significantly changes the plastic property of pug.Simultaneously, have many other factorses for example after cleaning remaining waste material in the machine, owing to the friction temperature of mixing or the slight excessively operation of equipment for extruding etc. causes raises, influence can extrude the processing characteristics of pug on may quite big degree, and these generally are difficult to be confirmed as the reason that can sum up in large-scale production.
In order to overcome above difficulty, these difficulties cause the honeycomb ceramics in pug extrudes to extrude performance and deviation occurs, the present invention has also designed a method of implementing the control that requires very effectively, and it is extremely important that described control extrudes for any successful honeycomb ceramics, and obtains describing in Fig. 1.This method of operating has not only improved and has extruded output in use, has obtained simultaneously can repeat more and the more rational result of extruding, and has eliminated owing to still less directly controlling pug and has finally extruded the good or bad unstability that extrudes body that performance produces.Method of the present invention can be carried out accurate control, this for stable and repeatably honeycomb ceramics to extrude be most important.
By keeping rheological parameter numerical value in desired level, this process steps realizes that successfully honeycomb ceramics extrudes.
Through above-mentioned extruding, the cellular body that extrudes of high-quality uses common drying equipment evenly dry.After super-dry, to fire the stove of honeycomb ceramics temperature is from 1350 ℃ to 140 ℃, temperature is decided by porosity and requirement of mechanical strength.
Single-phase cordierite can form batch of material and obtain by mixing cordierite, and its prescription is India's talcum of 39%, and total amount is 46% various types of India clay and 15% alumina.Through fully mixing (step 2 of Fig. 1) these constituents, in closing gap (closed gap) sigma blade mixer, same batch of material and 2% methylcellulose, 0.5% glycerine, 5% wheat flour, 21% water mixes the (step 3) of Fig. 1 45 minutes.Mixed pug is then outgased, and extrude into the form of 1 inch diameter rod, is used for the follow-up rheological test (step 4) of Fig. 1.These rods are inserted in the cylinder in the test fixture, and carry out the loading of complete assemblies on universal testing machine.
One cover has the cylindrical mold of the 4mm diameter of different length-to-diameter ratio rates, at an end of described cylinder, once is assembled into a mould.By the other end of described cylinder, insert the test blank that 1 inch diameter can extrude the cordierite pug after, use the piston type inserted link and extrude.This inserted link is designed to descend with various fixed speed, and in speed step each time, the loading load that extrudes test goes on record.
Suppose in mould, to exist plug-flow, analyzed result of the test by the 6-parametric model of using a pressure estimation.The mathematical equation of this 6 moduli type is described afterwards.
Follow by different parallel the extruding of commercially available conventional honeycomb die with a kind of pug.The result of honeycomb ceramics extruding is identified out, that demonstrate according to the quality of the requirement with reasonable productive rate or the bad effect that extrudes.A series of experimental results show that any successful honeycomb ceramics extrudes the special value of the rheological parameter that depends mainly on pug, and, define these characteristics of pug, and determined the scope of described numerical value.This paper has described the desired quantity of rheological parameter, has also described how to obtain desirable rheological parameter, with the cellular body that extrudes that successfully is improved.Desirable rheological parameter can obtain by the pug batch composition that extrudes of preparation certain limit, these mixtures can be by wheat flour, the tapioca of fusion India clay, talcum, alumina, quartz, pyrophyllite and different brackets, methylcellulose, glycerine, polyvinyl alcohol, polyethylene glycol, stearic acid, stearate, graphite, carbon and other binding agent, plasticizer, lubricant, these all are commonly used for the above-mentioned purpose that reaches control rheology parameter.
The 6-parametric model that is applied to described analysis is
P=(σ
0+ α V
m)+(τ
0+ β V
n) here, P always extrudes pressure (MPa), V is the speed of representing with mm/min that extrudes, and other 6 parameters are described in front.
For obtain preferred up to 400 holes, wall thickness from the cellular body that extrudes of 0.17 to 0.35mm high-quality, the Sigma (σ that obtains
0) value between 0.15 to 0.35MPa, more accurate between 0.16 to 0.23MPa, the value of Alfa (α) is at 0.001-0.07MPa (mm/min)
mBetween, and ' m ' value is no more than 0.40, Tow (τ
0) value between 0.001-0.002, the value of Beta (β) between 0.001-0.02 and ' value of n ' is not more than 0.45.
Sigma (σ
0) the upper limit do not limit to numerical value 0.35MPa.If extruding machine and mould can be stronger, can satisfy the sigma (σ that reaches higher
0) the more high pressure requirement of numerical value, extrude Sigma (σ
0) the high-quality honeycomb ceramics that is higher than 0.35MPa also is possible.If sigma (σ
0) value less than 0.15MPa, so, cordierite honeycomb bodies can not be extruded and the overall structure of honeycomb ceramics can not be maintained.Embodiment 1
A kind of single-phase cordierite can form batch of material and obtain by mixing cordierite, and its prescription is that 39% India's talcum, total amount are 46% dissimilar India's clay and 15% alumina.Through closely mixing (Fig. 1 step 2) these components, at the methylcellulose of a closed gap same batch of material of (closed gap) Sigma blade mixer and 2%, 0.5% glycerine, 5% wheat flour, 21% water mixes the (step 3) of Fig. 1 45 minutes.This pug through mixing then outgases and extrudes into the form of the rod of 1 inch diameter, is used for the follow-up rheological test (step 4) of Fig. 1.These rods are inserted in the cylinder in the test fixture, and carry out the loading of complete assemblies on universal testing machine.
One cover has the cylindric set of molds of 4mm diameter of different length-to-diameter ratio rates, once is assembled into a mould at an end of cylinder.By the other end of described cylinder, after insertion 1 inch diameter can extrude the cordierite pug, use the piston type inserted link to extrude.This inserted link is designed to descend with different fixed speeds, and in each speed step, the loading load that extrudes test goes on record.
Suppose to exist in mould plug flow, the 6-parametric model of a pressure estimation of match is analyzed result of the test.
6 to this batch of material of obtaining extrude parameter shown in experiment 2 in the table 1:
σ
0＝0.20?α＝0.0058 m＝0.368
τ
0＝0.002?β＝0.0093 n＝0.278
The pug that extrudes with above-mentioned rheological parameter numerical value is successfully produced the cellular body that extrudes with good quality and productivity ratio.And other experiment (being experiment-1, experiment-3, experiment-4) that has less variation on the binding agent and the water yield can not produce the cellular body that extrudes of high-quality.
Experiment-2 batch of materials through kneading are milled by kneading and the blank that obtains outgasing (Fig. 1 7), and it is sent to the hydraulic pressure extruder and obtains the cellular body (Fig. 1 8) that extrudes
Use suitable drying equipment evenly dry (Fig. 1 9) through obtaining the cellular squeeze-up of high-quality after the extruding of above-mentioned experiment-2.Fire (Fig. 1 10) through the honeycomb ceramics of super-dry in temperature is 1350 ℃ to 1420 ℃ kiln, this temperature is decided by porosity and requirement of mechanical strength.Through firing, the end of honeycomb ceramics is cut, and polishes and make end face parallel, the cordierite honeycomb bodies product that obtains making (Fig. 1 11).Instructions for use physics, machinery and the thermal property of various honeycomb ceramics of described method manufacturing of right be listed in table-3.Embodiment 2
Cordierite batch of material such as embodiment-1 preparation.But different is that water content changes between 19% and 22%, and binding agent changes between 2-3%.In addition, added 2% PVA binding agent.The sample batches of such preparation is tested and analyzed.The result is presented in the table 2.These sample batches extrude by various honeycomb die.Has from 0.15 to 0.35 σ
0The sample batches of value demonstrates the ability that good honeycomb ceramics extrudes performance and keeps shape.Have and be lower than 0.15 σ
0The sample batches of value extrudes and can not carry out because mould stops up.Material adheres on the mould, and the honeycomb ceramics that extrudes subsides and produces distortion.So, have similar experiment-5, experiment-7, the sample batches of the rheological behavior of experiment-9 can obtain the cellular body that extrudes of high-quality.Use these sample batches, adopt, can produce the very cordierite honeycomb bodies finished product of high-quality as the described method of embodiment-1.
The results list of various sample batches is at Fig. 2, in 3 and 4 (table 1,2 and 3).
Described hereinly the present invention relates to a non-limiting embodiments, and limit by corresponding claims.
Claims (6)
1. one kind is adopted predetermined rheological parameter by extruding the method for producing the cordierite honeycomb carrier, may further comprise the steps:
A) in batch mixer, talcum, clay and alumina are closely mixed, form the mixture of preparation cordierite;
B) in blender, in described mixture, add and mixed methyl cellulose, glycerine, wheat flour and water;
C) pug that mixes being outgased and extrude into bar-shaped form is that follow-up rheological test is used;
D) mixture of processing on pugging mill through kneading, the blank that obtains outgasing;
E) blank of this degassing is sent to extruding machine and carry out extruding of honeycomb ceramics;
F) the cellular body that extrudes of oven dry, and this structure is placed in the kiln of temperature between 1350 ℃-1420 ℃ fires, the temperature of kiln is decided by the requirement of porosity and mechanical strength.
2. the method for claim 1, wherein adopt predetermined rheological parameter to may further comprise the steps by extruding production cordierite honeycomb carrier:
The mixture that forms cordierite comprises India's talcum of 39%, and total amount is 46% various different types of India clay and 15% alumina.
3. method as claimed in claim 1 or 2, wherein, said mixture and 2% methylcellulose, 0.5% glycerine, 5% wheat flour and 21% water mix.
4. the method for claim 1, the wherein cellular body that extrudes is fired in the kiln of temperature between 1350 ℃ and 1420 ℃.
5. the method for claim 1, wherein Shi Yan result carries out match by the mathematical equation that adopts the 6-parameter model and analyzes.
6. the method for claim 1 is wherein in order well to extrude up to 200 holes, the wall thickness honeycomb ceramics about 0.2mm the sigma (σ that obtains
0) value is between 0.15-0.35MPa, alfa (α) is worth at 0.005-0.07MPa (mm/min)
mBetween, ' m ' value is no more than 0.40, Tow (τ
0) value is between 0.001-0.002, Beta (β) is worth between 0.001-0.02, and ' n ' value can not be greater than 0.45.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99104200 CN1128668C (en) | 1999-03-24 | 1999-03-24 | Method for producing cordierite cellular carrier using extrusion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99104200 CN1128668C (en) | 1999-03-24 | 1999-03-24 | Method for producing cordierite cellular carrier using extrusion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1268397A true CN1268397A (en) | 2000-10-04 |
| CN1128668C CN1128668C (en) | 2003-11-26 |
Family
ID=5271551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99104200 Expired - Lifetime CN1128668C (en) | 1999-03-24 | 1999-03-24 | Method for producing cordierite cellular carrier using extrusion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1128668C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444698B (en) * | 2008-12-05 | 2010-12-22 | 青岛碱业股份有限公司 | Desulphurizing tower for desulphurizing with seawater soda-residue emulsion |
-
1999
- 1999-03-24 CN CN 99104200 patent/CN1128668C/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101444698B (en) * | 2008-12-05 | 2010-12-22 | 青岛碱业股份有限公司 | Desulphurizing tower for desulphurizing with seawater soda-residue emulsion |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1128668C (en) | 2003-11-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS60239207A (en) | Manufacture of ceramic article | |
| CN101045629A (en) | Iolite cellular ceramic and preparation method | |
| US6080345A (en) | Method of forming and shaping plasticized mixtures | |
| KR100244445B1 (en) | Method for producing a body from powder material | |
| JP4369041B2 (en) | An improved method for preparing and shaping plasticized mixtures by low to medium shear extrusion. | |
| CN1308593A (en) | Binder system for honeycomb ceramic bodies and a method for producing said honeycomb bodies | |
| US20160039718A1 (en) | Ceramic precursor batch composition and method of increasing ceramic precursor batch extrusion rate | |
| US20090274866A1 (en) | Ceramic article and method for making it | |
| CN102351543A (en) | Extrusion molding composition and method for producing extrusion molded part | |
| CN1263517A (en) | Improved method of forming and shaping plasticized mixtures and green bodies made therefr | |
| CN1478016A (en) | Method for extruding ceramic honeycombs | |
| EP2118035A2 (en) | Plasticized mixture and method for stiffening | |
| EP1428809B1 (en) | Process for production of formed honeycomb body | |
| CN1128668C (en) | Method for producing cordierite cellular carrier using extrusion method | |
| US9227880B2 (en) | High porosity cordierite honeycomb articles | |
| JPS6124358B2 (en) | ||
| US6299678B1 (en) | Binder system for honeycomb ceramic bodies and a method for producing said honeycomb bodies | |
| CN104364219A (en) | Control of clay crystallite size for shrinkage management | |
| JP2003519078A5 (en) | ||
| CN1186179C (en) | Hollow ceramic rod and manufacturing process thereof, and its application for producing light refractory material | |
| CN116423614A (en) | Dry forming method for light mullite brick | |
| RU2223930C2 (en) | Method of preparing and molding plasticized powdered blend, powdered blend, and product obtained by this method | |
| MXPA00012059A (en) | Binder system for honeycomb ceramic bodies and a method for producing honeycomb bodies | |
| JPH01160880A (en) | Production of formed article of porous ceramic | |
| CN105753488A (en) | Forming method of sleeve blanks for fiber-optic connectors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20031126 |