CN112047720A - Preparation method of high-porosity particle catcher - Google Patents
Preparation method of high-porosity particle catcher Download PDFInfo
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- CN112047720A CN112047720A CN202010988569.9A CN202010988569A CN112047720A CN 112047720 A CN112047720 A CN 112047720A CN 202010988569 A CN202010988569 A CN 202010988569A CN 112047720 A CN112047720 A CN 112047720A
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- 239000002245 particle Substances 0.000 title claims abstract description 29
- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000000463 material Substances 0.000 claims abstract description 66
- 238000005245 sintering Methods 0.000 claims abstract description 27
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 18
- 229920002472 Starch Polymers 0.000 claims abstract description 17
- 235000019698 starch Nutrition 0.000 claims abstract description 17
- 239000008107 starch Substances 0.000 claims abstract description 17
- 239000000919 ceramic Substances 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims abstract description 9
- 239000002994 raw material Substances 0.000 claims abstract description 8
- 238000001035 drying Methods 0.000 claims abstract description 7
- 239000011230 binding agent Substances 0.000 claims abstract description 6
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 6
- 239000000314 lubricant Substances 0.000 claims abstract description 6
- 239000005995 Aluminium silicate Substances 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 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 4
- 235000012211 aluminium silicate Nutrition 0.000 claims abstract description 4
- NLYAJNPCOHFWQQ-UHFFFAOYSA-N kaolin Chemical compound O.O.O=[Al]O[Si](=O)O[Si](=O)O[Al]=O NLYAJNPCOHFWQQ-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000005416 organic matter Substances 0.000 claims abstract description 4
- 239000008188 pellet Substances 0.000 claims abstract description 4
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 4
- 239000000454 talc Substances 0.000 claims abstract description 4
- 229910052623 talc Inorganic materials 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 4
- 238000003756 stirring Methods 0.000 claims abstract description 3
- 239000010439 graphite Substances 0.000 claims description 6
- 229910002804 graphite Inorganic materials 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 238000000113 differential scanning calorimetry Methods 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- KAKVFSYQVNHFBS-UHFFFAOYSA-N (5-hydroxycyclopenten-1-yl)-phenylmethanone Chemical group OC1CCC=C1C(=O)C1=CC=CC=C1 KAKVFSYQVNHFBS-UHFFFAOYSA-N 0.000 claims description 2
- 229920002261 Corn starch Polymers 0.000 claims description 2
- 240000002853 Nelumbo nucifera Species 0.000 claims description 2
- 235000006508 Nelumbo nucifera Nutrition 0.000 claims description 2
- 239000008120 corn starch Substances 0.000 claims description 2
- 239000001866 hydroxypropyl methyl cellulose Substances 0.000 claims description 2
- 229920003088 hydroxypropyl methyl cellulose Polymers 0.000 claims description 2
- 235000010979 hydroxypropyl methyl cellulose Nutrition 0.000 claims description 2
- UFVKGYZPFZQRLF-UHFFFAOYSA-N hydroxypropyl methyl cellulose Chemical group 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 claims description 2
- 229920000058 polyacrylate Polymers 0.000 claims description 2
- 229920001592 potato starch Polymers 0.000 claims description 2
- 229920001169 thermoplastic Polymers 0.000 claims description 2
- 239000004416 thermosoftening plastic Substances 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 claims 6
- 238000005336 cracking Methods 0.000 abstract description 10
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 238000009825 accumulation Methods 0.000 abstract description 3
- 239000000203 mixture Substances 0.000 description 10
- 238000009472 formulation Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 239000011148 porous material Substances 0.000 description 6
- 239000006229 carbon black Substances 0.000 description 4
- 235000019241 carbon black Nutrition 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 4
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000008646 thermal stress Effects 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- C04B33/00—Clay-wares
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- C04B33/13—Compounding ingredients
- C04B33/1305—Organic additives
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- C04B33/00—Clay-wares
- C04B33/02—Preparing or treating the raw materials individually or as batches
- C04B33/13—Compounding ingredients
- C04B33/1315—Non-ceramic binders
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
- C04B35/632—Organic additives
- C04B35/636—Polysaccharides or derivatives thereof
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
- C04B38/063—Preparing or treating the raw materials individually or as batches
- C04B38/0635—Compounding ingredients
- C04B38/0645—Burnable, meltable, sublimable materials
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
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- C04B38/063—Preparing or treating the raw materials individually or as batches
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- C04B38/0645—Burnable, meltable, sublimable materials
- C04B38/068—Carbonaceous materials, e.g. coal, carbon, graphite, hydrocarbons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
- F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
- F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
- B01D2258/012—Diesel engines and lean burn gasoline engines
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
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- C04B2235/32—Metal oxides, mixed metal oxides, or oxide-forming salts thereof, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
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Abstract
The invention relates to a preparation method of a high-porosity particle catcher, which comprises the following steps: mixing 10-60% of starch pore-forming material, 0.1-30% of organic matter pellet pore-forming material and 5-30% of carbon source pore-forming material to form pore-forming material; mixing 40-45% of talc, 10-20% of kaolin, 20-30% of alumina and 10-15% of silicon oxide to form an inorganic raw material; then, according to the ratio of the inorganic raw materials to the pore-forming material of 10: 2-5, adding 6-10% of binder and 1-2% of lubricant, adding 20-30% of water, and stirring; extruding the materials by an extruder; drying the honeycomb ceramic blank body by a dryer; and (3) putting the dried honeycomb ceramic blank into a sintering furnace, gradually increasing the temperature from room temperature to 1420 ℃, increasing the temperature by 30 ℃ per hour, and then keeping the temperature at 1420 ℃ for 8 hours. By utilizing the ternary pore-forming material system, the requirement of high porosity is met, and the heat accumulation during sintering is reduced by staggering the heating peaks, so that the occurrence of sintering cracking is reduced.
Description
Technical Field
The invention relates to an automobile exhaust treatment device, in particular to a preparation method of a high-porosity particle catcher.
Background
Honeycomb ceramic particle trap technology has been widely used in the treatment of automobile and truck exhaust. In general, the honeycomb ceramic particle catcher adopts a wall-flow type filtration mode to remove particles in tail gas. The principle is that every other hole is blocked at the inlet, and the other hole is kept smooth; while at the outlet the corresponding hole remains blocked or unblocked conversely. Therefore, the honeycomb ceramic is in a chessboard type of the chess, and ensures that tail gas must pass through the wall, thereby achieving the purpose of retaining particles in the tail gas on the wall.
In application, particles (such as carbon black) in the tail gas are gathered in a channel which is not blocked at the inlet, and after a certain amount of particles is obtained, a computer system starts a regeneration process to burn off the collected carbon black, so that the back pressure of the system is reduced. Since most of such carbon blacks are small particles of micron or nanometer size, their burning speed is extremely fast, releasing a large amount of heat in a very short time (within ten or more minutes), causing a sharp rise in the internal temperature of the particle trap. If the control is not good, the particle catcher can be burnt. By computer control of the regeneration step, the risk of melting can be reduced. However, thermal stress resulting from too high and too fast a temperature rise is always present and is a major cause of particle trap cracking. Therefore, the particulate trap for a general diesel engine has a large heat capacity, and thus the temperature rising rate during regeneration is reduced. When the material is fixed, the increase of the heat capacity is realized by depending on the weight of the material, and the specific method is to increase the wall thickness.
At the same time, the material must have a certain porosity, e.g. 50-65%, in order to reduce the back pressure of the particle trap. In the case of the particle catcher, besides the pores of the material itself, the pores are formed by adding pore-forming material to increase the porosity to the expected range. Such pore-forming materials are burned off during the low temperature stage of sintering (150-. Typical pore-forming materials include carbon (graphite, activated carbon, carbon black), nutshell powder, starch, organic spheres, and the like. Although the pore-forming materials are different in types, they all have the following characteristics: exothermic upon burning off. Due to the fact that the addition amount of the pore-forming material in the formula of the particle catcher is large and the heat storage is large, the temperature of the center is increased too fast in the process, the temperature difference between the center and the periphery is increased, and sintering cracking is caused. To reduce the possibility of cracking, the temperature rise rate of the furnace is generally slowed, so that the pore-forming material slowly burns and releases heat, thereby reducing the temperature rise rate of the particle trap. For particle traps (greater than 10 inches in diameter) sintering processes, the total time is typically over 120 hours.
To meet ever more stringent exhaust emission standards, more and more catalyst is coated on the particle trap. This results in an increase in back pressure due to the pores being filled with catalyst. Therefore, for the case of high catalyst coating, high porosity materials are generally employed. The porosity of the material is more than 60%, so that the material can contain more catalyst and has good back pressure performance.
To increase porosity, more pore-forming material is typically added to the formulation. However, when the pore-forming material is contained to a certain extent, the porosity cannot be increased more by increasing the content thereof. On the other hand, excessive pore-forming material increases heat generation during sintering, thereby increasing the possibility of sintering cracking. Therefore, it is necessary to adjust the pore-forming material ratio in the formulation so as to not only meet the requirement of high porosity performance, but also avoid the possibility of sintering cracking.
Disclosure of Invention
The invention aims to provide a preparation method of a high-porosity particle catcher, which utilizes a ternary pore-forming material system to meet the requirement of high porosity and reduces heat accumulation during sintering by staggering a heating peak so as to reduce the occurrence of sintering cracking.
In order to achieve the purpose, the technical scheme of the invention is as follows: a preparation method of a high-porosity particle catcher comprises the following steps:
s1: mixing 10-60% of starch pore-forming material, 0.1-30% of organic matter pellet pore-forming material and 5-30% of carbon source pore-forming material, wherein the percentage of the formula is weight percentage, forming the pore-forming material, and analyzing exothermic peaks of various pore-forming materials by using differential scanning calorimetry;
s2: mixing 40-45% of talc, 10-20% of kaolin, 20-30% of alumina and 10-15% of silicon oxide, wherein the formula percentage is weight percentage to form inorganic raw materials;
s3: then, according to the ratio of the inorganic raw materials to the pore-forming material of 10: 2-5, adding 6-10% of binder and 1-2% of lubricant, adding 20-30% of water, and stirring to obtain a material;
s4: extruding the materials by an extruder to form a honeycomb ceramic blank;
s5: drying the honeycomb ceramic blank body by a dryer at the drying temperature of 80-120 ℃ for 20-40 minutes;
s6: and finally, sintering, namely putting the dried honeycomb ceramic blank into a sintering furnace, gradually raising the temperature from room temperature to 1420 ℃, raising the temperature at 30 ℃ per hour, keeping the temperature at 1420 ℃ for 8 hours, and finally taking out and naturally cooling.
The starch pore-forming material is one or more of corn starch, potato starch, lotus root starch and pea starch.
The organic small ball pore-forming material is a small ball-shaped thermoplastic acrylic polymer.
The carbon source pore-forming material is one or more of graphite, activated carbon and nut shell powder.
20-40% of starch pore-forming material.
0.5-5% of organic small-ball pore-forming material.
The binder is hydroxypropyl methyl cellulose, and the lubricant is potassium laurate.
After the method is adopted, the pore-forming material with different exothermic peaks is selected, so that exothermic in the sintering process can be released dispersedly, and the pore-forming material is heated slowly from normal temperature to 1420 ℃ in the heating process. Therefore, the sample is prevented from being heated up rapidly, the temperature difference between the inside and the outside of the sample is reduced, and the thermal stress is finally reduced. Experiments prove that the temperature difference can be reduced to half or less than that of a unitary pore-forming material by applying the ternary pore-forming material, so that the requirement of high porosity is met, and the heat accumulation during sintering is reduced by staggering the heating peaks, so that the occurrence of sintering cracking is reduced.
Detailed Description
The examples given below illustrate the invention in further detail.
According to the invention, three pore-forming materials are matched, the exothermic peak values of the pore-forming materials are in different temperature ranges, the three pore-forming materials are respectively 50% of starch, 20% of organic matter globules and 30% of graphite, and the pore-forming materials are formed after mixing.
Mixing 40% of talc, 20% of kaolin, 30% of alumina and 10% of silicon oxide, wherein the formula percentage is weight percentage, and forming an inorganic raw material; the proportion of the inorganic raw materials and the pore-forming materials is as follows, the invention adopts five proportions of ABCDE as comparison, see Table 1;
TABLE 1
Then, 4% of a binder, 1% of a lubricant, etc., and 26% of water were added to each formulation, and after mixing, the mixture was extruded into 200/12 honeycomb ceramic green bodies having a diameter of 280mm, wherein 200 means 200 cells per square inch and 12 means 12. mu. inches in wall thickness. And drying the blank body, and sintering. Drying the mixture by a dryer at 100 ℃ for 30 minutes;
s6: and finally, sintering, namely putting the dried honeycomb ceramic blank into a sintering furnace, gradually raising the temperature from room temperature to 1420 ℃, raising the temperature at 30 ℃ per hour, keeping the temperature at 1420 ℃ for 8 hours, and finally taking out and naturally cooling.
The exothermic peaks of the various pore-forming materials were analyzed by Differential Scanning Calorimetry (DSC). The exothermic peak values of the organic pellets, the starch and the graphite are respectively 280 ℃ and 182 ℃ respectively.
In order to measure the difference between the internal temperature and the external temperature during the sintering of the blank, one S-shaped thermocouple is inserted into the center of the sample, and the other S-shaped thermocouple is placed outside the sample and close to the skin. Heating from room temperature to 1420 deg.C at a rate of 30 deg.C/hr, holding at 1420 deg.C for 8 hr, and cooling. The maximum temperature difference results for the various formulations are shown in table 2.
TABLE 2
| Formulation of | Maximum temperature difference (. degree. C.) | Maximum temperature difference corresponds to furnace temperature (DEG C) |
| A | 185 | 310 |
| B | 163 | 308 |
| C | 120 | 305 |
| D | 85 | 300 |
| E | 83 | 300 |
As can be seen from Table 2, the furnace temperature corresponding to the maximum temperature difference is about 300-310 ℃, and the various formulas are not greatly different. However, the maximum temperature difference is very different depending on the formulation. The maximum temperature difference is reduced along with the reduction of the content of the starch substances, and the maximum temperature difference can be reduced by about half by reducing 70 percent of the starch substances. Due to the reduction of the temperature difference, the possibility of cracking can be greatly reduced, and the sintering time can be reduced.
The sintered samples were subjected to porosity tests and the results are shown in Table 3.
TABLE 3
| Formulation of | Porosity (%) | Average pore diameter (um) |
| A | 51.3 | 18.3 |
| B | 49.5 | 17.6 |
| C | 50.5 | 16.8 |
| D | 51.5 | 15.9 |
| E | 48.3 | 16.3 |
As can be seen from table 3, the use of two or more pore-forming materials does not have a significant effect on the porosity after sintering, and the pore size can be adjusted. For the formulation with the target of about 50% porosity, the aim can be achieved by using less than 8% of starch substances, adding 0.5-3% of organic small balls and adding proper graphite.
By combining the above results, the pore-forming materials with different exothermic peaks are purposefully selected, and the exothermic in the sintering process can be dispersedly released, so that the sample is prevented from being rapidly heated, the temperature difference between the inside and the outside of the sample is reduced, and the thermal stress is finally reduced. Experiments prove that the temperature difference can be reduced to half or less than that of a unitary pore-forming material by applying a binary or ternary pore-forming material, so that sintering cracking is effectively avoided, and the sintering time is saved. In addition, the required porosity and pore size can be achieved by proper pore-forming material proportion.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various changes and modifications can be made without departing from the inventive concept of the present invention, and these changes and modifications are all within the scope of the present invention.
Claims (7)
1. A preparation method of a high-porosity particle catcher is characterized by comprising the following steps: the preparation method comprises the following steps:
s1: mixing 10-60% of starch pore-forming material, 0.1-30% of organic matter pellet pore-forming material and 5-30% of carbon source pore-forming material, wherein the percentage of the formula is weight percentage, forming the pore-forming material, and analyzing exothermic peaks of various pore-forming materials by using differential scanning calorimetry;
s2: mixing 40-45% of talc, 10-20% of kaolin, 20-30% of alumina and 10-15% of silicon oxide, wherein the formula percentage is weight percentage to form inorganic raw materials;
s3: then, according to the ratio of the inorganic raw materials to the pore-forming material of 10: 2-5, adding 6-10% of binder and 1-2% of lubricant, adding 20-30% of water, and stirring to obtain a material;
s4: extruding the materials by an extruder to form a honeycomb ceramic blank;
s5: drying the honeycomb ceramic blank body by a dryer at the drying temperature of 80-120 ℃ for 20-40 minutes;
s6: and finally, sintering, namely putting the dried honeycomb ceramic blank into a sintering furnace, gradually raising the temperature from room temperature to 1420 ℃, raising the temperature at 30 ℃ per hour, keeping the temperature at 1420 ℃ for 8 hours, and finally taking out and naturally cooling.
2. The method of making a high porosity particle trap as defined in claim 1, wherein: the starch pore-forming material is one or more of corn starch, potato starch, lotus root starch and pea starch.
3. The method of making a high porosity particle trap as defined in claim 1, wherein: the organic small ball pore-forming material is a small ball-shaped thermoplastic acrylic polymer.
4. The method of making a high porosity particle trap as defined in claim 1, wherein: the carbon source pore-forming material is one or more of graphite, activated carbon and nut shell powder.
5. The method of making a high porosity particle trap as defined in claim 1, wherein: 20-40% of starch pore-forming material.
6. The method of making a high porosity particle trap as defined in claim 3, wherein: 0.5-5% of organic small-ball pore-forming material.
7. The method of making a high porosity particle trap as defined in claim 1, wherein: the binder is hydroxypropyl methyl cellulose, and the lubricant is potassium laurate.
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| WO2006006667A1 (en) * | 2004-07-14 | 2006-01-19 | Ngk Insulators, Ltd. | Method for manufacturing porous honeycomb structure |
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| CN111423248A (en) * | 2020-05-14 | 2020-07-17 | 常州浩蔚环保科技有限公司 | Production process of particle catcher |
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| WO2006006667A1 (en) * | 2004-07-14 | 2006-01-19 | Ngk Insulators, Ltd. | Method for manufacturing porous honeycomb structure |
| US20070142208A1 (en) * | 2005-12-21 | 2007-06-21 | Addiego William P | High porosity cordierite ceramic honeycomb article and method |
| JP2010001184A (en) * | 2008-06-20 | 2010-01-07 | Nippon Soken Inc | Method for manufacturing exhaust gas filter |
| WO2012023617A1 (en) * | 2010-08-19 | 2012-02-23 | 日立金属株式会社 | Manufacturing method for ceramic honeycomb structure |
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