Honeycomb ceramic hole plugging depth controllable method, honeycomb ceramic carrier and application of honeycomb ceramic carrier

Abstract

The invention provides a honeycomb ceramic hole plugging depth controllable method, a honeycomb ceramic carrier and application of the honeycomb ceramic carrier, and relates to the technical field of honeycomb ceramic hole plugging, in the blade coating hole plugging process, hole plugging parameters conform to the following formula: YM = YMax-K * X / (Z * P * D), and YM is the target hole plugging depth of honeycomb ceramic; z is the blade coating frequency in the hole blocking process; x is the viscosity of the hole plugging material; p is the pressure applied to the honeycomb ceramic end face by the blade coating plate; d is the diameter of each honeycomb ceramic plugging hole; yMax is the maximum hole plugging depth; when the viscosity of the hole plugging material is lower than 1000 dpa.s, K is selected to be 0.0289; or when the viscosity of the hole plugging material is higher than 1000 dpa.s, K is selected to be 0.0363. When the viscosity of the hole plugging material is 200 dpa.s-2000 dpa.s, the error between the hole plugging depth of the honeycomb ceramic and the target hole plugging depth is ensured to be lower than 10% by changing the blade coating frequency.

Description

Technical Field

[0001] The invention relates to the technical field of honeycomb ceramic pore plugging, and in particular to a honeycomb ceramic pore plugging depth controllable method, a honeycomb ceramic carrier and applications thereof. Background Art

[0002] Particle filters are used to filter fine particulate matter (PM) emitted by gasoline and diesel vehicles. Particle filters have a special honeycomb structure, which consists of a honeycomb body separated by porous walls and plugging holes set at the air inlet and exhaust ports. The plugging holes are arranged in a staggered pattern like chess pieces. When the exhaust gas from the engine flows into the inlet of the filter, the tiny particles carried are captured at the plugging holes, while the gas passes through the pore walls of the honeycomb structure into the adjacent compartments and is finally discharged. Depending on the application object, particle filters can be divided into gasoline particulate filters (GPF) for gasoline vehicles and diesel particulate filters (DPF) for diesel vehicles. At present, honeycomb particle filters usually use mature cordierite ceramics as the filter body material.

[0003] During the production of honeycomb ceramic carriers, cross-hole plugging or alternate-row plugging is required. During plugging, the plugging material is usually applied to the honeycomb ceramic carrier manually, and then pressed and left to stand by heavy objects to achieve the plugging process. This method has low production efficiency and is time-consuming and labor-intensive. At the same time, the surface flatness of the carrier after plugging by this method is poor. The plugging operation of carriers with different mesh sizes also requires the selection of the size of the pressing block according to the size of the carrier cross-section, which has low practicality and wastes a lot of time.

[0004] There is also a scraper type method for plugging holes in honeycomb ceramics. The scraper is used to scrape back and forth on the end face of the honeycomb ceramic for multiple times, so that the plugging material is applied to the inside of the honeycomb ceramic carrier and the plugging depth is increased to a suitable position through multiple scraping. However, in the normal production process, as the configured plugging material dries, the viscosity of the plugging material becomes higher and higher, and the plugging degree of honeycomb ceramics in the same batch is not the same, and the plugging depth error can even exceed 20%, which will cause the pressure drop and other parameters of the products produced in the same batch to be different. Therefore, in the plugging process, it is necessary to continuously test the plugging depth and the current viscosity of the plugging material, which wastes a lot of material and energy.

[0005] In view of this, the present invention is proposed. Summary of the invention

[0006] One of the objects of the present invention is to provide a method for controllable plugging depth of honeycomb ceramics, which can ensure that the error between the plugging depth of the honeycomb ceramics and the target plugging depth is less than 10%, thereby effectively achieving the purpose of preparing honeycomb ceramics with target plugging depth, so that the honeycomb ceramics have better pressure drop and filtering effects, and also avoiding the problem of different parameters such as pressure drop of products produced in the same batch.

[0007] The second object of the present invention is to provide a honeycomb ceramic carrier with relatively uniform pore blocking degree, pore blocking depth error less than 10%, and better pressure drop and filtering effect.

[0008] A third object of the present invention is to provide an application of a honeycomb ceramic carrier, which is beneficial to improving the filtering effect of the particle filter.

[0009] In order to achieve the above-mentioned purpose of the present invention, the following technical solutions are particularly adopted:

[0010] In a first aspect, a method for controlling the depth of honeycomb ceramic plugging is provided, the method comprising:

[0011] In the process of scraping and plugging holes, the plugging parameters conform to the following formula:

[0012] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0013] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0014] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0015] The viscosity of the pore-plugging material is between 200 dpa·s and 2000 dpa·s.

[0016] Furthermore, the scraping times are between 1 and 40 times.

[0017] Furthermore, the pressure applied by the scraping plate to the end surface of the honeycomb ceramic is between 0.1 MPa and 0.7 MPa.

[0018] Furthermore, the diameter of the pores of the honeycomb ceramic plugging is between 1.3 mm and 2.0 mm;

[0019] Preferably, the pore density of the honeycomb ceramic is 150 cpsi to 400 cpsi.

[0020] Furthermore, the maximum pore plugging depth is the pore plugging thickness when the coating is applied more than 40 times.

[0021] Furthermore, the height of the honeycomb ceramic is 125 mm to 256 mm;

[0022] Preferably, the diameter of the honeycomb ceramic is 143.8 mm to 330.2 mm;

[0023] Preferably, the porosity of the honeycomb ceramic is 40% to 65%.

[0024] Further, the shape of the compartment of the honeycomb ceramic includes at least one of a square and a rectangle;

[0025] Preferably, the compartments are arranged in a checkerboard pattern with alternately blocked holes in the cross section of the ceramic unit body.

[0026] In a second aspect, a honeycomb ceramic carrier is provided which is obtained by plugging the pores according to any of the above methods.

[0027] A third aspect is an application of the honeycomb ceramic substrate described above in a particle filter.

[0028] Furthermore, the particle filter includes at least one of a gasoline particle filter and a diesel particle filter.

[0029] Compared with the prior art, the present invention has at least the following beneficial effects:

[0030] The method for controlling the plugging depth of honeycomb ceramics provided by the present invention determines the target depth required for plugging and the maximum depth of plugging, limits the viscosity of the plugging material, the scraping pressure and the pore diameter, and uses the known parameters to calculate the required number of scrapings; since the viscosity of the plugging material increases with time, the method of the present invention can be used to plug the holes of honeycomb ceramics to ensure that when the viscosity of the plugging material is between 200 dPa·s and 2000 dPa·s, the number of scrapings is changed multiple times to ensure the plugging depth of the honeycomb ceramics (the actual plugging depth Y S ) and target plugging depth (Y M ) has an error of less than 10% (|Y M -Y S | / Y S <10%), the purpose of effectively preparing honeycomb ceramics with target plugging depth is achieved, so that it has better pressure drop and filtering effect, and the problem of different parameters such as pressure drop of products produced in the same batch is avoided; the method of the present invention can reduce the need to continuously test the plugging depth and the current viscosity of the plugging material during the plugging process, and only needs to continuously test the real-time viscosity of the same plugging material, so it is beneficial to save material and energy.

[0031] The honeycomb ceramic carrier provided by the present invention has relatively uniform pore blocking degrees, a pore blocking depth error of less than 10%, and has good pressure drop and filtering effects.

[0032] The application of the honeycomb ceramic carrier provided by the present invention is beneficial to improving the filtering effect of the particle filter. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] According to a first aspect of the present invention, a method for controlling the depth of honeycomb ceramic plugging is provided, the method comprising:

[0035] In the process of scraping and plugging holes, the plugging parameters conform to the following formula:

[0036] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0037] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0038] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0039] The viscosity of the pore plugging material is between 200 dPa·s and 2000 dPa·s.

[0040] It should be noted that the honeycomb ceramic structure can be a cylindrical structure with multiple compartments, the compartments are separated by partitions, and the partitions are porous structures; at the same time, the pores between the compartments can be blocked alternately; the gas flows into the honeycomb ceramic structure from the inlet end and flows out from the outlet end of the honeycomb ceramic structure through the porous partitions.

[0041] The method of the present invention can ensure that when the viscosity of the plugging material is between 200 dPa·s and 2000 dPa·s, the number of scraping times can be changed multiple times to ensure the plugging depth of the honeycomb ceramic (the actual plugging depth Y S ) and target plugging depth (Y M ) has an error of less than 10% (|Y M -Y S | / Y S<10%), effectively achieving the purpose of preparing honeycomb ceramics with a target plugging depth, making it have better pressure drop and filtering effect, and also avoiding the problem of different parameters such as pressure drop of products produced in the same batch.

[0042] At the same time, the method of the present invention can reduce the need to continuously test the plugging depth and the current viscosity of the plugging material during the plugging process. It only needs to continuously test the real-time viscosity of the same plugging material, which is beneficial to saving material and energy.

[0043] In the present invention, the pore plugging material can be prepared by the following method:

[0044] (1) mixing the inorganic main raw material and the organic binder having a mass fraction of 0.5% to 3% relative to the inorganic main raw material in a planetary mixer for 15 to 50 minutes to obtain a uniformly mixed dry powder;

[0045] The inorganic main raw material may be one or a mixture of cordierite powder, silica powder and kaolin; the D10 of the inorganic main raw material may be in the range of 2.0 μm to 5.0 μm, the D50 may be in the range of 6.0 μm to 12.0 μm, and the D90 may be in the range of 16.0 μm to 23.0 μm;

[0046] The organic binder may be one or a mixture of two or more of xanthan gum, methyl cellulose, ethyl cellulose, polyethylene oxide, guar gum and carrageenan; the viscosity of the organic binder may be in the range of 13000 mpa·s to 16000 mpa·s;

[0047] (2) mixing an inorganic binder having a mass fraction of 15% to 35% relative to the inorganic main raw material and water having a mass fraction of 25% to 50% relative to the inorganic main raw material to obtain a uniformly mixed liquid material;

[0048] The inorganic binder may be one or a mixture of two or more of silica sol, alumina sol, and silica-alumina sol;

[0049] (3) Add the liquid material obtained in step (2) to the dry powder material obtained in step (1), and continue mixing in a planetary mixer for 30 minutes to 75 minutes to obtain a mixed slurry, which is the pore plugging material.

[0050] In a preferred embodiment, the number of scraping times Z during the plugging process can be 1 to 40 times, and typical but non-limiting number of scraping times Z are, for example, 1, 5, 10, 15, 20, 25, 30, 35, and 40 times.

[0051] In the plugging process, the plugging material is first scraped into the honeycomb ceramic, then dried for 20s to 50s at 280℃ to 320℃ by a baking lamp to fix the shape, and then dried for 10s to 30s at 140℃ to 280℃ by a baking lamp to fix the shape, and then transferred to the drying room for drying, so as to be thoroughly dried and the plugging is completed.

[0052] In a preferred embodiment, the pressure P applied by the scraping plate to the end face of the honeycomb ceramic during the scraping of the plugging material is 0.1 MPa to 0.7 MPa, and a typical but non-limiting pressure P is, for example, 0.1 MPa, 0.2 MPa, 0.3 MPa, 0.4 MPa, 0.5 MPa, 0.6 MPa, and 0.7 MPa.

[0053] In the present invention, the pore diameter D of the honeycomb ceramic plugging can be between 1.3 mm and 2.0 mm, for example, it can be 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2.0 mm, but not limited to this; at the same time, the compartment density of the honeycomb ceramic, that is, the pore density can be 150 cpsi to 400 cpsi, for example, it can be 150 cpsi, 200 cpsi, 250 cpsi, 300 cpsi, 350 cpsi, 400 cpsi, but not limited to this.

[0054] In the present invention, the cells in the honeycomb ceramic may all be in the shape of a square or a rectangle; and / or, the cells may be arranged in a checkerboard pattern with holes blocked alternately in the cross section of the ceramic unit body.

[0055] In a preferred embodiment, the raw material components of the honeycomb ceramic include inorganic components, organic components and water; wherein the inorganic components include but are not limited to at least one of cordierite powder and kaolin; and the organic components include but are not limited to binders and lubricants.

[0056] In a preferred embodiment, the maximum plugging depth Y Max It can be the plugging thickness when the scraper is applied more than 40 times.

[0057] In the present invention, the height of the honeycomb ceramic may be 125 mm to 256 mm, the diameter may be 143.8 mm to 330.2 mm, and the porosity may be 40% to 65%.

[0058] According to a second aspect of the present invention, there is provided a honeycomb ceramic carrier obtained by plugging the pores according to any one of the above methods.

[0059] The honeycomb ceramic carrier provided by the present invention has relatively uniform pore blocking degrees, a pore blocking depth error of less than 10%, and has good pressure drop and filtering effects.

[0060] According to a third aspect of the present invention, there is provided a use of the honeycomb ceramic carrier described above in a particle filter.

[0061] In the present invention, the particulate filter includes but is not limited to at least one of a gasoline particulate filter and a diesel particulate filter.

[0062] The application of the honeycomb ceramic carrier provided by the present invention is beneficial to improving the filtering effect of the particle filter.

[0063] The present invention is further described below by way of examples. Unless otherwise specified, the materials in the examples are prepared according to existing methods or directly purchased from the market.

[0064] Example 1

[0065] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0066] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0067] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0068] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0069] In this embodiment, the process of scraping and plugging holes is as follows:

[0070] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 8.36 μm. The inorganic main raw material, xanthan gum accounting for 2.2% of the mass fraction of the inorganic main raw material, and 0.03% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 25% of the mass fraction of the inorganic main raw material and 35% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0071] The plugging material (viscosity 640 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.6 Mpa, the scraping times were 7 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0072] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0073] Example 2

[0074] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0075] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0076] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0077] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0078] In this embodiment, the process of scraping and plugging holes is as follows:

[0079] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 8.12 μm. The inorganic main raw material, xanthan gum accounting for 2.8% of the mass fraction of the inorganic main raw material, and 0.03% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 28% of the mass fraction of the inorganic main raw material and 33% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0080] The plugging material (viscosity 810 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.6 MPa, the scraping times were 8 times, and then it was dried at 300°C for 45 seconds by a baking lamp, and then dried at 160°C for 30 seconds by a baking lamp, and then transferred to a drying room and dried at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0081] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0082] Example 3

[0083] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0084] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0085] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0086] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0087] In this embodiment, the process of scraping and plugging holes is as follows:

[0088] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 7.97 μm. The inorganic main raw material, xanthan gum accounting for 3% of the mass fraction of the inorganic main raw material, and 0.035% of polyethylene oxide are added to a planetary mixer and dry mixed for 30 minutes to obtain a dry powder material; Silica sol accounting for 30% of the mass fraction of the inorganic main raw material and 35% of water are evenly mixed to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0089] The plugging material (viscosity 1100 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.6 Mpa, the scraping times were 8 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0090] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0091] Example 4

[0092] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0093] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0094] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0095] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0096] In this embodiment, the process of scraping and plugging holes is as follows:

[0097] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 8.48 μm. The inorganic main raw material, xanthan gum accounting for 1.7% of the mass fraction of the inorganic main raw material, and 0.03% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 25% of the mass fraction of the inorganic main raw material and 37% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0098] The plugging material (viscosity 380 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.64 MPa, the scraping times were 3 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0099] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0100] Example 5

[0101] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0102] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0103] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0104] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0105] In this embodiment, the process of scraping and plugging holes is as follows:

[0106] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 9.01 μm. The inorganic main raw material, xanthan gum accounting for 1.8% of the mass fraction of the inorganic main raw material, and 0.02% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 27% of the mass fraction of the inorganic main raw material and 37% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0107] The plugging material (viscosity 430 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.64 MPa, the scraping times were 4 times, and then it was dried at 300°C for 45 seconds by a baking lamp, and then dried at 160°C for 30 seconds by a baking lamp, and then transferred to a drying room and dried at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0108] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0109] Example 6

[0110] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0111] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0112] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0113] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0114] In this embodiment, the process of scraping and plugging holes is as follows:

[0115] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 7.67 μm. The inorganic main raw material, xanthan gum accounting for 1.3% of the mass fraction of the inorganic main raw material, and 0.02% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 28% of the mass fraction of the inorganic main raw material and 35% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0116] The plugging material (viscosity 290 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.7 MPa, the scraping times were 6 times, and then it was dried at 300°C for 45 seconds by a baking lamp, and then dried at 160°C for 30 seconds by a baking lamp, and then transferred to a drying room and dried at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0117] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0118] Example 7

[0119] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0120] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0121] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0122] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0123] In this embodiment, the process of scraping and plugging holes is as follows:

[0124] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 10.1 μm. The inorganic main raw material, xanthan gum accounting for 1.8% of the mass fraction of the inorganic main raw material, and 0.03% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 25% of the mass fraction of the inorganic main raw material and 35% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0125] The plugging material (viscosity 390 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.7 MPa, the scraping times were 4 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0126] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0127] Example 8

[0128] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0129] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0130] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0131] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0132] In this embodiment, the process of scraping and plugging holes is as follows:

[0133] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 6.66μm. The inorganic main raw material, xanthan gum accounting for 2% of the mass fraction of the inorganic main raw material, and 0.035% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 30% of the mass fraction of the inorganic main raw material and 33% of water are mixed uniformly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0134] The plugging material (viscosity 1020 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.7 MPa, the scraping times were 15 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0135] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0136] Example 9

[0137] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0138] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0139] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0140] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0141] In this embodiment, the process of scraping and plugging holes is as follows:

[0142] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 9.45 μm. The inorganic main raw material, xanthan gum accounting for 2.5% of the mass fraction of the inorganic main raw material, and 0.04% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 25% of the mass fraction of the inorganic main raw material and 35% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0143] The plugging material (viscosity 1480 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.7 MPa, the scraping times were 15 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0144] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0145] Example 10

[0146] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0147] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0148] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0149] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0150] In this embodiment, the process of scraping and plugging holes is as follows:

[0151] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 7.41 μm. The inorganic main raw material, xanthan gum accounting for 3% of the mass fraction of the inorganic main raw material, and 0.045% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 30% of the mass fraction of the inorganic main raw material and 33% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0152] The plugging material (viscosity 1680 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.7 MPa, the scraping times were 13 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0153] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0154] Embodiment 11

[0155] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0156] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0157] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0158] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0159] In this embodiment, the process of scraping and plugging holes is as follows:

[0160] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 8.56 μm. The inorganic main raw material, xanthan gum accounting for 3% of the mass fraction of the inorganic main raw material, and 0.05% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 30% of the mass fraction of the inorganic main raw material and 37% of water are mixed uniformly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0161] The plugging material (viscosity 1940 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.7 MPa, the scraping times were 15 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0162] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0163] Example 12

[0164] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0165] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0166] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0167] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0168] In this embodiment, the process of scraping and plugging holes is as follows:

[0169] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 8.89 μm. The inorganic main raw material, xanthan gum accounting for 1.3% of the mass fraction of the inorganic main raw material, and 0.02% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 22% of the mass fraction of the inorganic main raw material and 38% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0170] The plugging material (viscosity 230 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.35 mm, the scraping pressure was 0.7 MPa, the scraping times were 3 times, and then it was dried at 300°C for 45 seconds by a baking lamp, and then dried at 160°C for 30 seconds by a baking lamp, and then transferred to a drying room and dried at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0171] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0172] Example 13

[0173] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0174] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0175] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0176] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0177] In this embodiment, the process of scraping and plugging holes is as follows:

[0178] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 6.98μm. The inorganic main raw material, xanthan gum accounting for 2.2% of the mass fraction of the inorganic main raw material, and 0.03% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 28% of the mass fraction of the inorganic main raw material and 35% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0179] The plugging material (viscosity 600 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.35 mm, the scraping pressure was 0.7 MPa, and the number of scraping times was 6 times, and then it was dried at 300°C for 45 seconds by a baking lamp, and then dried at 160°C for 30 seconds by a baking lamp, and then transferred to a drying room and dried at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0180] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0181] Embodiment 14

[0182] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0183] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0184] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0185] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0186] In this embodiment, the process of scraping and plugging holes is as follows:

[0187] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 8.94 μm. The inorganic main raw material, xanthan gum accounting for 3% of the mass fraction of the inorganic main raw material, and 0.035% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 28% of the mass fraction of the inorganic main raw material and 35% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0188] The plugging material (viscosity 1150 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.35 mm, the scraping pressure was 0.7 MPa, the scraping times were 22 times, and then dried at 300°C for 45 seconds by a baking lamp, and then dried at 160°C for 30 seconds by a baking lamp, and then transferred to a drying room and dried at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0189] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0190] Embodiment 15

[0191] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0192] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0193] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0194] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0195] In this embodiment, the process of scraping and plugging holes is as follows:

[0196] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 7.83 μm. The inorganic main raw material, xanthan gum accounting for 3% of the mass fraction of the inorganic main raw material, and 0.045% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 30% of the mass fraction of the inorganic main raw material and 33% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0197] The plugging material (viscosity 1680 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.35 mm, the scraping pressure was 0.7 MPa, the scraping times were 21 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0198] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0199] Example 16

[0200] A method for controlling the depth of honeycomb ceramic plugging is provided, wherein plugging is performed by scraping. During the plugging process, the plugging parameters are shown in Table 1, and the parameters conform to the following formula:

[0201] Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0202] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0203] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0204] In this embodiment, the process of scraping and plugging holes is as follows:

[0205] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 6.96μm. The inorganic main raw material, xanthan gum accounting for 2% of the mass fraction of the inorganic main raw material, and 0.03% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 25% of the mass fraction of the inorganic main raw material and 35% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0206] The plugging material (viscosity 1620 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.47 mm, the scraping pressure was 0.7 Mpa, the scraping times were 28 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0207] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0208] Comparative Example 1

[0209] A method for plugging holes in honeycomb ceramics. The plugging parameters are shown in Table 1. The plugging process of scraping and coating is as follows:

[0210] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 8.90 μm. The inorganic main raw material, xanthan gum accounting for 1.5% of the mass fraction of the inorganic main raw material, and 0.03% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 25% of the mass fraction of the inorganic main raw material and 35% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0211] The plugging material (viscosity 340 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.8 MPa, the scraping times were 2 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0212] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0213] Comparative Example 2

[0214] A method for plugging holes in honeycomb ceramics. The plugging parameters are shown in Table 1. The plugging process of scraping and coating is as follows:

[0215] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 6.59 μm. The inorganic main raw material, xanthan gum accounting for 2.2% of the mass fraction of the inorganic main raw material, and 0.03% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 28% of the mass fraction of the inorganic main raw material and 35% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0216] The plugging material (viscosity 600 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.27 mm, the scraping pressure was 0.7 MPa, and the scraping times were 6 times, followed by drying at 300°C for 45 seconds by a baking lamp, and then drying at 160°C for 30 seconds by a baking lamp, and then transferred to a drying room for drying at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0217] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0218] Comparative Example 3

[0219] A method for plugging holes in honeycomb ceramics. The plugging parameters are shown in Table 1. The plugging process of scraping and coating is as follows:

[0220] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 9.87 μm. The inorganic main raw material, 3% xanthan gum accounting for the mass fraction of the inorganic main raw material, and 0.055% polyethylene oxide are added to a planetary mixer and dry mixed for 30 minutes to obtain a dry powder material; 35% silica sol accounting for the mass fraction of the inorganic main raw material and 30% water are mixed uniformly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0221] The plugging material (viscosity 2350 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.63 mm, the scraping pressure was 0.7 MPa, the scraping times were 16 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0222] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0223] Comparative Example 4

[0224] A method for plugging holes in honeycomb ceramics. The plugging parameters are shown in Table 1. The plugging process of scraping and coating is as follows:

[0225] An inorganic main raw material containing 90% cordierite powder and 10% kaolin is mixed, and the D50 after mixing is 7.91 μm. The inorganic main raw material, xanthan gum accounting for 1% of the mass fraction of the inorganic main raw material, and 0.02% of polyethylene oxide are added to a planetary mixer for dry mixing for 30 minutes to obtain a dry powder material; silica sol accounting for 25% of the mass fraction of the inorganic main raw material and 40% of water are mixed evenly to obtain a liquid material; the liquid material is added to the planetary mixer after the dry mixing is completed and wet mixed for 60 minutes to obtain a pore plugging material;

[0226] The plugging material (viscosity 170 dpa·s) was scraped onto the end surface of the honeycomb ceramic, wherein the diameter of the plugging hole was 1.35 mm, the scraping pressure was 0.7 MPa, the scraping times were 5 times, and then it was dried at 300°C for 45 seconds by a baking lamp to set the shape, and then dried at 160°C for 30 seconds by a baking lamp to set the shape, and then transferred to a drying room to dry at 50°C for 360 minutes, so as to be completely dried and the plugging was completed;

[0227] Z S (Actual number of scraping times), Y S (actual plugging depth) and the error of plugging depth are shown in Table 2.

[0228] Table 1

[0229] <![CDATA[Z S (Actual number of scraping times)]]> <![CDATA[Y S (Actual plugging depth) / mm]]> <![CDATA[|Y M -AND S | / And S ×100%]]> Example 1 7 7.22 3.02 Example 2 8 6.96 0.60 Example 3 9 6.14 8.82 Example 4 3 6.57 8.69 Example 5 4 7.12 1.71 Example 6 7 8.70 3.50 Example 7 5 7.85 1.90 Example 8 16 8.13 1.55 Example 9 15 7.17 2.44 Example 10 14 6.36 5.61 Embodiment 11 15 5.98 0.35 Example 12 3 5.90 1.77 Example 13 5 4.77 4.82 Embodiment 14 22 6.39 6.12 Embodiment 15 21 5.49 8.93 Example 16 28 7.18 4.46 Comparative Example 1 2 6.86 12.54 Comparative Example 2 6 6.04 32.43 Comparative Example 3 16 4.24 29.68 Comparative Example 4 5 5.17 16.16 It can be seen from Table 1 and Table 2 that in Examples 1-16, when the plugging material viscosity X, the number of scraping times Z and the scraping pressure P meet the following conditions, the actual plugging depth Y of the honeycomb ceramic is S and target plugging depth Y M Satisfied | Y M -Y S | / Y S <10%, achieving the purpose of effectively preparing honeycomb ceramics with target pore plugging depth; Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm;

[0230] When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289;

[0231] Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363;

[0232] The viscosity of the plugging material is between 200 dpa·s and 2000 dpa·s, the pressure P applied by the scraping plate to the end surface of the honeycomb ceramic is between 0.1 MPa and 0.7 MPa, and the pore diameter D of the honeycomb ceramic is between 1.3 mm and 2.0 mm.

[0233] Compared with the embodiments, the comparative example 1 has a larger scraping pressure. When a pore-plugging material with a lower viscosity is used, the error of the pore-plugging depth is 12.54% after scraping twice. It can be seen that the error is large, and the pore-plugging depth cannot be adjusted to the target pore-plugging value by adjusting the number of scraping times; compared with the embodiments, the pore diameter of the comparative example 2 is lower than 1.3 mm, and the narrower pore diameter greatly reduces the slurry entering the pore each time scraping, resulting in an error of more than 30% in the pore-plugging depth; compared with the embodiments, the extremely high viscosity of the pore-plugging material in the comparative example 3 greatly hinders the slurry from entering the pore each time scraping, and the extremely high viscosity of the pore-plugging material also hinders the movement of the slurry in the pore, resulting in an error of nearly 30% in the pore-plugging depth; compared with the embodiments, the extremely low viscosity of the pore-plugging material in the comparative example 4 causes the slurry to flow around during the scraping process and is difficult to enter the pore. At the same time, after the pore-plugging material enters the pore, it will fall off or shift from the pore-plugging end due to insufficient viscosity, resulting in an error of 16.16% in the pore-plugging depth.

[0234] It can be seen that the present invention can obtain the number of scraping times required for the target honeycomb ceramics using the pore plugging material of the current viscosity by determining the target pore plugging depth and the maximum pore plugging depth. At the same time, by limiting the viscosity of the pore plugging material, the scraping pressure and the pore diameter, the purpose of preparing honeycomb ceramics with the target pore plugging depth is effectively achieved, so that it has better pressure drop and filtration effect.

[0235] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for controlling the depth of honeycomb ceramic plugging, characterized in that: The method comprises: During the process of scraping and plugging holes, the plugging parameters meet the following conditions: Y M =Y Max -K×X / (Z×P×D),Y M is the target plugging depth of the honeycomb ceramic, in mm; Z is the number of scraping times during the plugging process; X is the viscosity of the plugging material, in dPa·s; P is the pressure applied by the scraping plate to the end face of the honeycomb ceramic, in MPa; D is the pore diameter of the honeycomb ceramic plugging, in mm; Y Max is the maximum plugging depth, in mm; When the viscosity of the plugging material is lower than 1000 dPa·s, K is selected as 0.0289; Or, when the viscosity of the plugging material is higher than 1000 dPa·s, K is selected as 0.0363; The viscosity of the pore-plugging material is between 200 dpa·s and 2000 dpa·s.

2. The method according to claim 1, characterized in that The scraping times are between 1 and 40 times.

3. The method according to claim 1, characterized in that The pressure applied by the scraping plate to the end surface of the honeycomb ceramic is between 0.1 MPa and 0.7 MPa.

4. The method according to claim 1, characterized in that The pore diameter of the honeycomb ceramic plugging is between 1.3 mm and 2.0 mm; Preferably, the pore density of the honeycomb ceramic is 150 cpsi to 400 cpsi.

5. The method according to claim 1, characterized in that The maximum plugging depth is the plugging thickness when the coating is applied more than 40 times.

6. The method according to any one of claims 1 to 5, characterized in that: The height of the honeycomb ceramic is 125 mm to 256 mm; Preferably, the diameter of the honeycomb ceramic is 143.8 mm to 330.2 mm; Preferably, the porosity of the honeycomb ceramic is 40% to 65%.

7. The method according to any one of claims 1 to 5, characterized in that: The shape of the cells of the honeycomb ceramic includes at least one of a square and a rectangle; Preferably, the compartments are arranged in a checkerboard pattern with alternately blocked holes in the cross section of the ceramic unit body.

8. A honeycomb ceramic carrier obtained by plugging the pores according to any one of claims 1 to 7.

9. Use of the honeycomb ceramic substrate according to claim 8 in a particle filter.

10. The use according to claim 9, characterized in that: The particulate filter includes at least one of a gasoline particulate filter and a diesel particulate filter.

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