KR20200095772A - Ceramic filter manufacturing methods of using rotary brush coater method by mixed ceramic powder - Google Patents

Abstract

The present invention relates to a method for manufacturing a ceramic filter produced by winding a mixed ceramic powder. Specifically, the present invention relates to a ceramic filter and a manufacturing method thereof, wherein an organic binder in the liquid slurry state is first coated or supported on the carrier, one or more ceramic powders are selected from each group consisting of silicon carbide, alumina, silymanite, kaolin, silica, titania, clay and diatomaceous earth, one or more are selected from each group consisting of pore-forming agents and inorganic binders, mixed in a powder state, and manufactured, the mixed ceramic powder is secondarily coated or supported on a carrier carrying an organic binder in a slurry state to form a molded product, and the molded product is dried and sintered to form the ceramic filter. According to the ceramic filter using mixed ceramic powder and the method for manufacturing the same of the present invention, the manufacturing cost is lowered, the manufacturing method is easy, and at the same time, the shape change and production of large filters are easy, abrasion resistance and durability are excellent, and porosity control range is relatively excellent.

Description

Ceramic filter manufacturing method of mixed ceramic powder by rotary brush method {CERAMIC FILTER MANUFACTURING METHODS OF USING ROTARY BRUSH COATER METHOD BY MIXED CERAMIC POWDER}

The present invention collects and reduces particulate matter in the process and environment in which water and air pollutants are generated, or simultaneously reduces waste gas generated at the same time by adding a catalytic function, a ceramic filter having excellent chemical resistance, abrasion resistance, and durability. It is to make a product, and use various functional ceramic materials to reduce particulate matter and waste gas at the same time under conditions of environmental pollution of water and atmosphere for the purpose of simultaneously reducing by adding the function of the selected catalyst to the ceramic filter. It relates to making filters and ceramic catalyst filters.

In the case of conventionally developed ceramic filters, vacuum molding or compression molding of a tube shape using ceramic fibers was the most common method. This is relatively excellent in filtration efficiency and back pressure characteristics, but the manufacturing cost is high. When used for a long time, the durability of the filter decreases due to deterioration of the ceramic fiber, and the filtration efficiency decreases. In addition, the ceramic fiber is damaged when dust is removed from the outer wall by spraying compressed air in the reverse direction in the filter regeneration operation. Damaged ceramic fibers are included in exhaust gas and discharged even under normal operation conditions, thereby generating secondary pollutants.

In addition, in the case of the vacuum forming process, it takes a lot of cost to manufacture the vacuum box and the vacuum pump, and the size of the ceramic filter that can be manufactured is determined according to the size limit of the vacuum box, so that a large ceramic filter cannot be manufactured. There is a problem in that it is difficult to continuously produce within the error range because the mold needs to be replaced at a certain amount of production according to the characteristics of the ceramic powder material with high wear, and the production cost is high due to high fixed cost.

In addition to the above vacuum molding method, compression molding methods such as extrusion molding, press molding, and hydrostatic pressure molding are being developed, but even in this case, it is necessary to make and use a mold when molding a product. The cost increases and manufacturing is not easy, and when the mold is determined, it is not easy to change the manufacturing shape, and it is difficult to continuously produce large filters. Accordingly, in the case of the above molding method, since the molding method is formed by a pressurization method, the porosity is low, so that the air permeability decreases, and there is a problem of increasing the pressure loss when passing through the filter.

In order to solve the problems of the prior art as described above, the present invention makes a liquid slurry by mixing an organic binder and an inorganic binder with a solvent in a separate mixer, and then coating or supporting it on a carrier, and then silicon carbide, alumina, and Silymanite, kaolin, silica, titania, clay, diatomaceous earth and slag, one or more ceramic powders selected from each group consisting of waste foundry sand, a pore-forming agent, and one or more selected from each group consisting of inorganic binders in powder form A ceramic filter manufactured, characterized in that the powder is coated or supported on a support body on which a liquid slurry mixed with an organic-inorganic binder is supported and formed, and then the formed product is dried and sintered. About.

The ceramic filter manufacturing method in which the mixed ceramic powder of the present invention is produced by wind molding minimizes wear of the equipment when the product production equipment is operated, so that the deviation of quality can be continuously produced within an error range, and the manufacturing cost is low and the manufacturing method Not only this is easy, but at the same time, shape change and production of large filters are easy, abrasion resistance, durability are excellent, and porosity control range is relatively excellent.

Another object of the present invention is to provide a method of manufacturing a ceramic filter in which the manufacturing cost is low, the manufacturing method is easy, and at the same time, the shape change and the production of a large filter are easy.

Another object of the present invention is to provide a ceramic filter capable of maximizing dust collection efficiency by maximizing the filtering area of the filter through shape change within a certain space.

The present invention is a ceramic produced by making a liquid slurry in which an organic binder and an inorganic binder are mixed, applying or supporting it on a carrier, and applying and seating the mixed ceramic powder on a carrier using the rotary brush method, and winding it by a wind molding method. It relates to a filter manufacturing method, and more specifically, a problem of quality deviation occurs due to changes in product size, thickness, strength, etc. due to wear of parts in the process of supplying raw materials to production facilities that produce ceramic filters. It is characterized by separating and supplying ceramic powder raw materials with severe wear and tearing separately, and by separating the binder supply process to increase the molding strength, which extends the life of parts of production facilities, lowers manufacturing cost, and facilitates manufacturing methods. In addition, the present invention relates to a ceramic filter that is relatively excellent in mass production by changing shape and quality deviation of large filter at the same time within the tolerance range and making it easy to mass-produce, wear resistance, durability, porosity control range, and large-sized ceramic filter and its manufacturing method. .

A liquid slurry in which the organic and inorganic binders of the present invention are mixed is made and applied or supported on a carrier, and the mixed ceramic powder is applied and seated on the carrier using the rotary brush method, and the ceramic filter produced by winding molding is manufactured. The method is to produce a product in the order of molding, drying, and sintering by first coating or supporting an organic binder in a liquid slurry state on a carrier, and then coating or coating and supporting mixed ceramic powder on it. In the process of supplying raw materials to the facility, there is a problem in which quality deviation occurs due to changes in product size, thickness, strength, etc. due to wear. This problem is solved, manufacturing cost is low, manufacturing method is easy, and shape change And it is easy to mass-produce within the tolerance range of the quality deviation of the large-sized filter, abrasion resistance, durability, porosity control range, and to a relatively excellent ceramic filter and a manufacturing method for mass continuous production by increasing the size.

In addition, the present invention minimizes abrasion of production facilities, enables long-term use of parts, allows easy shape change within an allowable error range, and facilitates manufacturing of complex shapes, thus maximizing the filter area within a certain space. It is possible to continuously manufacture and produce ceramic filters that can be produced in large quantities. In addition, the ceramic filter of the present invention is excellent in abrasion resistance, chemical resistance, and durability, so it can be used at high pressure. In particular, the ceramic filter of the present invention can be used as a dust collection filter of various dust collection facilities, especially in the post-treatment process of various industrial processes. & Steelmaking, cement, incinerators, dust collectors, etc. It can be used for VOC's) removal equipment. In addition, the ceramic filter may be manufactured by dimensional cutting into a circular, square, or radially bent tube shape according to the application field, so that the application range thereof can be varied.

1 is a process chart showing a basic flow of a method for manufacturing a ceramic filter by supplying mixed ceramic powder by a rotary brush method and winding forming
FIG. 2 is a schematic diagram showing a basic flow of a facility for manufacturing a ceramic filter by supplying mixed ceramic powder by a rotary brush method, applying it to the left and right with a constant thickness, and manufacturing a ceramic filter by wind molding.
3 is a perspective view showing a basic rotary brush device used to apply a mixed ceramic slurry to a carrier.

In order to achieve the above object, the present invention

a) i) Organic binders include methylcellulose (MC), ethylcellulose (EC), carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA), and Preparing a liquid slurry by mixing 12 to 85 parts by weight of one or more powders selected from the group consisting of a grass made of rice, wheat, various grains, etc. with a solvent;

ii) Inorganic binder is a liquid slurry by mixing 5.5 to 85.4 parts by weight of one or more powders selected from the group consisting of various glaze, barium carbonate (BaCO ₃ ), frit, and glass powder with a solvent. Manufacturing steps;

iii) the above i) organic binder ii) inorganic binder liquid slurry can be used, respectively, and if necessary, mixing and sufficiently loading the carrier through a process such as coating, spraying or immersion to settle and stabilize;

b) preparing an organic binder and an inorganic binder in step a) by supporting the carrier on the carrier and applying the mixed ceramic powder below it in a horizontally uniform distribution using a rotary brush method;

i) the ceramic powder is prepared by mixing 25 to 98 parts by weight of ceramic powder selected from the group consisting of silicon carbide, alumina, silymanite, kaolin, silica, titania and slag, diatomaceous earth, clay, and waste foundry sand;

ii) preparing the pore-forming agent by mixing 2.5 to 36 parts by weight of one or more powders selected from each group consisting of wood powder, each kind of activated carbon, synthetic resin powder, talc, naphthalene, and the like;

iii) preparing the inorganic binder by mixing 5.5 to 85.4 parts by weight of powder selected from the group consisting of various glazes, barium carbonate (BaCO ₃ ), frit, and glass powder;

iv) preparing a mixed ceramic powder by mixing at least one powder selected from the above i) ceramic powder ii) pore-forming agent iii) inorganic binder each mixed powder;

c) A process in which the amount and distribution of the mixed ceramic powder prepared in step b) are uniformly supported on the carrier 90 by the rotary brush method.For example, the diameter of the circular bar of the rotary 10 is 100 mm. * 2000mm in length, 3~5mm in width, 3~5mm in depth, 1900mm in length are dug in the length direction, and these grooves are arranged at regular intervals of 1~5mm in the circular bar, and the powder 30 is filled in the longitudinal direction and the circular bar ( When 10) is rotated, a certain amount of the mixed ceramic powder 35 is supported on the carrier, and in order to have a more uniform distribution, a blade or a rotating brush bar 70 and 80 are placed in the width direction and supplied. A manufacturing step of adjusting the thickness of the mixed ceramic powder to settle and stabilize it on the carrier;

d) A liquid slurry obtained by mixing the organic and inorganic binders prepared in step a) or a liquid slurry prepared at a different mixing ratio on the carrier on which the mixed ceramic powder is supported in step c) is secondarily coated or sprayed. A manufacturing step of stabilizing;

e) a manufacturing step of forming a carrier obtained by secondary coating or spraying the liquid slurry of step c) on a carrier on which the mixed ceramic powder is supported in step d) by a winding method;

f) a manufacturing step of drying the molded product on which the mixed ceramic powder is supported in step e) by various known methods;

g) a manufacturing step of separating the molded product dried in step f) and sintering it to form a basic product;

h) It provides a method for manufacturing a ceramic filter comprising the steps of surface coating, dimensional cutting, catalyst coating, other processing, and assembling the basic product produced through sintering in step g).

In addition, the present invention provides a ceramic filter manufactured by the above method.

Hereinafter, the present invention will be described in detail.

The ceramic filter of the present invention is a ceramic filter selected from the group consisting of silicon carbide, alumina, silymanite, kaolin, silica, titania, clay, and diatomaceous earth by first coating or supporting a liquid organic and inorganic binder on a carrier. After the powder, prepared by mixing the powder, the pore-forming agent, the organic binder, and the inorganic binder, is supported on the carrier by the rotary brush method, and the liquid organic and inorganic binder prepared in step a) is settled and stabilized through secondary coating or spraying. It is formed by winding method. It characterized in that it is manufactured by drying the molded product, separating it from the mold, and sintering it through the step h).

The method of manufacturing a ceramic filter of the present invention will be described as follows.

a) Liquid organic and inorganic binder manufacturing and support

In this step, i) the organic binder is carboxymethyl cellulose (CMC), methylcellulose (MC), ethylcellulose (EC), polyvinyl alcohol (PVA), and This is a step of preparing a slurry state by mixing 12 to 85 parts by weight of one or more powders selected from the group consisting of a grass made of rice, wheat, various grains, etc. with a solvent.

ii) Inorganic binder is a liquid slurry by mixing 5.5 to 85.4 parts by weight of one or more powders selected from the group consisting of various glaze, barium carbonate (BaCO ₃ ), frit, and glass powder with a solvent. Manufacturing steps;

iii) The above i) organic binder ii) inorganic binder The solvent used in the step of preparing each liquid slurry includes those that can be used by mixing each binder such as groundwater, tap water, distilled water, alcohol, benzene, toluene, etc.

iv) This step is a manufacturing step in which the prepared organic binder slurry is supported on a carrier, and the size of the carrier used may vary depending on the size of the ceramic filter to be manufactured. Any porous structure capable of supporting slurry or burning can be used.

In particular, it is more preferable to use a polymer compound having a form such as a nonwoven fabric, a woven fabric, a mesh or a sponge, etc. for ease of application, and the nonwoven fabric is based on a fiber aggregate in a web or sheet form. It is a form made by bonding with an adhesive, bonding between fibers using thermoplastic fibers, or entangled fibers by needle punching or sewing, especially polyester, aramid, and home-acrylic ), polyphenylene sulfide, polyimide, polytetrafluoroethylene (PTFE), viscose, natural fiber, glass fiber, ceramic fiber, or metal fiber. Do.

The woven fabric is manufactured by spinning, weaving, cotton yarn, or the like, and is preferably woven loosely to support the slurry to contain sufficient pores for supporting the slurry in the woven fabric.

The mesh includes synthetic resins such as plastic, PE, PET, PVC, and metals, non-ferrous metals, glass fibers, and natural materials.

The support in this step may be carried out by applying the organic binder slurry to a carrier, immersing the carrier in the slurry, or spraying (spraying) the slurry on the carrier.

In particular, it is better to apply the organic binder slurry in the same manner as in the previous operation or by a known method after the process of first supporting the carrier and applying and spraying the mixed ceramic powder thereon.

b) Preparation of mixed ceramic powder

This step is a step of preparing a slurry by mixing i) 15 to 70 parts by weight of ceramic powder, ii) 5 to 40 parts by weight of pore-forming agent, and iii) 10 to 80 parts by weight of an inorganic binder.

The ceramic powder of i) used in the present invention is a component constituting the basic structure of the ceramic filter after drying and serves as a support for the ceramic filter.

As the ceramic powder, various types of conventional ceramic powder used in the art may be used. The ceramic powder is silicon carbide, alumina, silymanite (sillimanite group, Al ₂ O ₃ ·SiO ₂ ), kaolin (kaolin group, Al ₂ O ₃ ·2SiO ₂ ·2H ₂ O), silica (SiO ₂ ), titania , Clay, diatomaceous earth or slag, waste casting sand, and the like are preferably used, and more preferably, alumina, silicon carbide, or a mixture thereof is used.

The ceramic powder may use components having various particle sizes, certain components may have the same particle size, and of course, the same components having different particle sizes may be mixed and used, and in particular, a particle size of 0.001 µm to 3 mm. It is desirable. When the particle size of the ceramic powder is within the above range, there is an effect of improving the pore formation and mechanical strength of the ceramic filter.

The ceramic powder is preferably included in the slurry composition in an amount of 25 to 60 parts by weight. When the content is within the above range, there is an effect of maintaining the physical strength and shape of the ceramic filter, and at the same time, there is an effect of remarkably improving the filtration efficiency. In addition, it is possible to prevent warping and cracking during drying and increase the wear resistance of the ceramic filter.

The pore-forming agent of ii) used in the present invention serves to form pores of the ceramic filter after drying, and to adsorb exhaust gas and odor.

The pore-forming agent may be carbon (carbon), activated carbon, wood powder, synthetic resin powder, salt, naphthalene, or talc.

Of course, the pore-forming agent may use components having various particle sizes, and it is particularly preferable to have a particle size of 0.001 µm to 1 mm. When the particle size of the pore-forming agent is within the above range, there is an effect of improving the pore formation and functionality of an appropriate size of the ceramic filter.

The pore-forming agent disappears or becomes smaller in the drying process to form pores of the ceramic filter, and the content is preferably included in the slurry composition in an amount of 5 to 40 parts by weight. When the content is within the above range, pores of the ceramic filter can be effectively formed upon drying.

The inorganic binder of iii) used in the present invention serves to form a bond between the slurry and the carrier.

The inorganic binder is prepared by mixing 5 to 82 parts by weight of at least one powder selected from the group consisting of various glaze, frit, barium carbonate (BaCO ₃ ), and glass powder. In particular, frit powder (SiO ₂ 50 to 95 wt%, Al ₂ O ₃ 10 to 40 wt%, CaO 2 to 30 wt%, NaO 3 to 35 wt%, K ₂ O 3 to 35 wt%, B ₂ O ₃ 3 to 40 wt%, MgO 0.1 to 10 wt%, other 0.01 to 8 wt%) and glass powder (SiO ₂ 50 to 75 wt%, Al ₂ O ₃ 10 to 30 wt%, Na2O 5 to 20 wt%) %, B ₂ O ₃ 0.1 to 15 wt%, MgO 0.1 to 10 wt%, and other 0.01 to 5 wt%), when the content is within the above range, the mixed powder is the molding strength of the ceramic filter in the molding of the heat-resistant material. It can be combined effectively by increasing durability, and when the content is within the above range, there is an effect of effectively combining the slurry and the carrier.

The ceramic powder, pore-forming agent, and inorganic binder as described above may be simultaneously added and mixed, or may be sequentially separated and mixed at regular intervals. The mixing time of the mixture is preferably carried out for 10 minutes to 12 hours. It is better if the slurry mixed as described above is aged for at least 10 minutes or more for stabilization.

c) The mixed ceramic powder is supported on the carrier by the rotary brush method.

This step is a manufacturing step in which the amount and distribution of the mixed ceramic powder prepared in step b) are uniformly supported on the carrier by the rotary brush method.

For an example of the process of supporting the rotary brush method in this step, a circular bar with a diameter of 100 mm * 2000 mm in length and a length of 3 to 5 mm in the length direction, 3 to 5 mm in depth, and 1900 mm in length is dug into the entire cylinder. Powders are filled in the longitudinal direction by arranging these grooves at regular intervals of 1 to 5 mm in the bar, and when the circular bar is rotated, a certain amount of mixed ceramic powder is supported on the carrier, and a blade or brush that can rotate to have a more uniform distribution. This is a manufacturing step in which the mixed ceramic powder supplied by placing the bars 70 and 80 in the width direction is distributed on the carrier in a predetermined amount or adjusted to a thickness within an error range to settle and stabilize on the carrier.

It goes without saying that the carrier used in the present invention may have different sizes, shapes, and thicknesses according to the sizes and shapes of ceramic filters to be manufactured.

Any porous structure capable of supporting the liquid slurry may be used as the support, and it is more preferable to use each type of non-woven fabric, woven fabric, mesh, or sponge for ease of application.

In the non-woven fabric, short fibers are bonded with an adhesive based on a web or sheet-like fiber aggregate, or a thermoplastic fiber is used to bond the fibers, or by needle punching, sewing, etc. to entangle the fibers. It is a made form, especially polyester, aramid, polyphenylenesulfide, home-acrylic, viscose, polyimide, polytetrafluoroethylene, PTFE), natural fibers, glass fibers, ceramic fibers, or metal fibers are preferably used.

The woven fabric is manufactured by spinning, weaving, cotton yarn, or the like, and is preferably woven loosely to support the slurry to contain sufficient pores for supporting the slurry in the woven fabric.

The mesh includes synthetic resins such as plastic, PE, PET, PVC, and metals, non-ferrous metals, glass fibers, and natural materials.

The support in this step may be carried out by applying the slurry to a carrier, immersing the carrier in the slurry, or spraying (spraying) the slurry on the carrier. Before the loading, the carrier is adhered, fused, After manufacturing in the form of a ceramic filter to be manufactured through sewing, self-bonding, or shaping using a mold, the slurry may be loaded.

In particular, the process of immersing and weaving the carrier in the slurry solution is repeated 2 to 3 times so that sufficient ceramic powder is included in the carrier, and the process of squeezing or applying or spraying the slurry on the carrier is performed. It is better to repeat ~3 times so that the slurry solution is sufficiently supported on the carrier.

When the carrier is cut or molded to a certain size and then supported on the slurry, the drying step can be performed immediately, and if the carrier is not cut or molded to a certain size, forming a shape suitable for the purpose. By performing additionally, it is possible to manufacture a molded article of a certain shape.

d) Second coating after loading the mixed ceramic powder on the carrier

In this step, a liquid slurry obtained by mixing the organic and inorganic binders prepared in step a) or a liquid slurry prepared at a different mixing ratio on a support body in which the mixed ceramic powder is supported by the rotary brush method is secondarily coated or sprayed. A manufacturing step of stabilizing;

e) Product molding after loading on the carrier

In this step, the support body on which the mixed ceramic powder is supported by the rotary brush method can be variously molded in a desired shape according to the purpose, and in particular, it is applied to a circular tube, a radial bending tube, or a square tube shape The support may be closely bonded to each other, fixed with a clamp, etc., and may be molded using a frame such as a circular tube shape, a radial tube shape, or a square tube shape, and is usually molded by a winding method using an inner frame.

In addition, when the support is closely coupled to the mold, a release film may be added between the support and the mold to facilitate separation of the mold and the support after drying. For the demolding film, preferably, a resin film or a paper film such as kraft paper made of synthetic resin or epoxy resin including rubber, urethane resin, PE, PET, PP, PVC, ABS, plastic, etc. may be used. , More preferably, it is more preferable to use a heat shrinkable film without a seam.

f) drying after molding

This step is a step of drying the molded product in which the mixed ceramic powder prepared in the above step is supported by the rotary brush method. At this time, drying serves to fix the shape deformation of the molding.

The drying can be carried out by using methods such as natural drying, hot air drying, sun drying, or shading drying, and in particular, infrared drying is preferably performed to shorten the drying time and prevent deformation of the molded product and prevent cracking. , It is preferable to dry for 5 hours or more between 10 and 240°C based on general hot air drying.

g) sintering

This step is a step of sintering the molded product dried in step f) to make a ceramic filter base product and then processing it.

In the sintering, the mold of the dried molded product is removed, put in a drying furnace, and dried for the maximum time so that there is no moisture in the filter. It can be determined and sintered at different sintering temperatures.

h) Functional addition and processing

In addition, the ceramic filter of the present invention improves the collection efficiency through pore control on the surface and improves functionality through catalyst coating, or by additionally applying a functional material to the inside or outside of the dried ceramic filter through processes such as dimensional cutting and assembly. After, drying may include a step, and the application of the functional material can be applied to a variety of known coating methods in which appropriate bonding between the functional material and the ceramic filter can be applied. In particular, the application of the functional material, After spraying and deposition, drying and sintering steps may be further included.

The functional material may be used alone or in combination with zeolite, platinum, palladium, rhodium, silver, TiO ₂ , or ZnO, Mn.

The functional material applied to the inside or outside of the ceramic filter may be coated with the same component inside and outside the ceramic filter, or by different components inside and outside the ceramic filter.

Hereinafter, preferred embodiments are presented to aid understanding of the present invention, but the following examples are only illustrative of the present invention, and the scope of the present invention is not limited to the following examples.

[Example]

Example 1

30 to 90 parts by weight of distilled water was added to the mixer, 30 to 60 parts by weight of an organic binder was added thereto, followed by mixing in a mixer for 10 minutes or more to prepare a slurry solution.

A carrier (nonwoven fabric) having a size of 1850 mm in width x 4500 mm in length x 0.5 mm in thickness is supplied by cutting a dotted line in the vertical direction to the carrier to which the prepared slurry solution is supplied in a roll state, and a binder slurry solution is sufficiently supported thereon. The first spray was applied as possible.

In a separate mixer, 30 to 90 parts by weight of alumina powder, 30 to 90 parts by weight of pore-forming agent, 40 to 60 parts by weight of an organic binder, and 40 to 60 parts by weight of an inorganic binder are added to a separate mixer, and mixed in a mixer for 10 minutes or longer to prepare a mixed ceramic powder. The left and right distribution was uniformly applied to the support at a thickness of 1 mm by the rotary brush method, and a certain amount of the organic binder was applied on it by a secondary spray with a constant horizontal distribution.

Then, a circular tube-shaped molding frame made of aluminum is made to be symmetrical in a diagonal line, and when combined, a circular shape is used. After bonding a release film to the surface of the molding frame, the organic binder and the mixed ceramic powder are applied. A molded article was manufactured by winding the lag in the shape of a mold, and hot air-dried at a temperature of 30 to 70° C. for 10 hours.

After removing the mold and the release film from the assembled dried molded product, the molded product was sintered, followed by surface coating, processing, and assembly to complete a ceramic filter.

Example 2

In Example 1, the length of the process of uniformly applying the mixed ceramic powder using alumina as the main raw material left and right is set to a range of 2000 mm, and then 2500 mm is the above except for grape mixed ceramic powder using silicon carbide (SiC) as the main raw material. In the same manner as in Example 1, a ceramic filter was manufactured.

Example 3

In Example 1, instead of alumina (Al ₂ O ₃ ) parts by weight, 20 to 80 parts by weight of alumina and 20 to 80 parts by weight of silicon carbide (SiC) were mixed together, and a pore-forming agent was added and the dried molded product was less than 700°C. A ceramic filter was manufactured in the same manner as in Example 1, except that the sintering temperature was used.

Example 4

Using a radial bending tube forming frame in place of the circular tube-shaped forming frame in Example 1, a) nonwoven fabrics having various shapes and forms immersed in the slurry solution in the manufacturing step b) mixed ceramic powder in the manufacturing step The supported and molded product was dried, separated, and the post-sintering process was carried out in the same manner as the post-sintering process of Example 1 to prepare a ceramic filter.

Example 5

In the same manner as in Example 1, except that in Example 1, a non-woven fabric immersed in the slurry solution was formed using a square tube-shaped molding mold in place of the circular tube-shaped molding mold. To manufacture a ceramic filter.

Example 6

In Example 1, it was carried out in the same manner as in Example 1, except that a plate-shaped molding mold was used instead of a circular tube-shaped molding mold to form a nonwoven fabric immersed in a slurry solution with a thickness of 3 mm to 50 mm. Thus, a ceramic filter was manufactured.

10 Ceramic powder supply rotary 20 Powder container, Hopper, Silo
30 Mixed ceramic powder 35 Apply to ceramic powder carrier
40 drive motor 50 fixing plate
60 Height adjustment device 70 Blade or rotatable brush 1
80 to rotatable brush 2 90 carrier

Claims (10)

a) i) Organic binders include methylcellulose (MC), ethylcellulose (EC), carboxymethyl cellulose (CMC), polyvinyl alcohol (PVA), and Preparing a liquid slurry by mixing 12 to 85 parts by weight of one or more powders selected from the group consisting of a grass made of rice, wheat, various grains, etc. with a solvent;
ii) Inorganic binder is a liquid slurry by mixing 5.5 to 85.4 parts by weight of one or more powders selected from the group consisting of various glaze, barium carbonate (BaCO ₃ ), frit, and glass powder with a solvent. Manufacturing steps;
iii) the above i) organic binder ii) inorganic binder liquid slurry may be used, respectively, and if necessary, mixing and sufficiently loading on the carrier through processes such as coating, spraying or immersion to settle and stabilize;
b) preparing an organic binder and an inorganic binder in step a) by supporting the carrier with a rotary brush method and applying the mixed ceramic powder under the mixed ceramic powder to the left and right in a uniform distribution;
i) the ceramic powder is prepared by mixing 25 to 98 parts by weight of ceramic powder selected from the group consisting of silicon carbide, alumina, silymanite, kaolin, silica, titania and slag, diatomaceous earth, clay, and waste foundry sand;
ii) preparing the pore-forming agent by mixing 2.5 to 36 parts by weight of one or more powders selected from each group consisting of wood powder, each kind of activated carbon, synthetic resin powder, talc, naphthalene, and the like;
iii) preparing the inorganic binder by mixing 5.5 to 85.4 parts by weight of powder selected from the group consisting of various glazes, barium carbonate (BaCO ₃ ), frit, and glass powder;
iv) preparing a mixed ceramic powder by mixing at least one powder selected from the above i) ceramic powder ii) pore-forming agent iii) inorganic binder each mixed powder;
c) A process in which the mixed ceramic powder prepared in step b) is uniformly supported in the amount and distribution applied to the carrier by the rotary brush method. For example, if the diameter of the circular bar is 100mm * the length is 2000mm, the length direction By digging a groove with a width of 3 to 5 mm, a depth of 3 to 5 mm, and a length of 1900 mm, the powder is filled in the longitudinal direction by arranging these grooves at regular intervals of 1 to 5 mm on the circular bar. A manufacturing step of mounting and stabilizing the supported mixed ceramic powder by adjusting the thickness of the mixed ceramic powder supplied by placing the blade in the width direction to have a more uniform distribution thereof;
d) Secondly coating or spraying a liquid slurry obtained by mixing the organic and inorganic binders prepared in step a) or a liquid slurry prepared at a different mixing ratio on the carrier on which the ceramic powder mixed in step c) is supported by the rotary brush method. Manufacturing step of stabilizing and seating through;
e) a manufacturing step of forming a carrier obtained by secondary coating or spraying the liquid slurry of step c) on a carrier on which the mixed ceramic powder is supported in step d) by a rotary brush method, by a winding method;
f) a manufacturing step of drying the molded product formed by winding the carrier on which the mixed ceramic powder is supported by the rotary brush method in step e) by various known methods;
g) a manufacturing step of separating the molded product dried in step f) and sintering it to form a basic product;
h) Including all of the above steps in the manufacturing step of the ceramic filter, characterized in that it includes the steps of surface coating, dimensional cutting, catalyst coating, other processing, and assembling the basic product produced through sintering in step g). Method of manufacturing a ceramic filter. The method of claim 1, wherein the amount and distribution of the mixed ceramic powder prepared in step c) of preparing the liquid binder slurry in step a) are uniformly applied to the carrier by the rotary brush method. A method for manufacturing a ceramic filter, characterized by a step of making. The method of claim 1, wherein in forming the carrier supported in step c) by a winding method using an inner frame, it includes the contents and embodiments of the invention, and is manufactured by a method of manufacturing a molded article using the same. Method of manufacturing a ceramic filter The method of claim 1, wherein the i) organic binder of step a) is methylcellulose (MC), ethylcellulose (EC), carboxymethylcellulose (CMC), and polyvinyl alcohol. Poiyvinyl alcohol, PVA), a method of preparing by mixing one or more organic binders selected from the group consisting of grass made by processing grains (rice, wheat, corn, etc.); The ceramic powder of claim 1, wherein the ceramic powder of step b) is selected from the group consisting of alumina, silicon carbide, silymanite, kaolin, silica, titania and diatomaceous earth, clay, slag, and waste foundry sand. A method of manufacturing a ceramic filter, characterized in that prepared by mixing. The preparation of a ceramic filter according to claim 1, wherein the ii) pore-forming agent in step b) is selected from the group consisting of carbon, activated carbon, wood powder, synthetic resin powder, salt, naphthalene, and talc. Way. The method of claim 1, wherein the carrier in step b) supports the binder slurry in step a), and each type of nonwoven fabric, woven fabric, mesh (material net, metal net, synthetic resin (PE, PET, PP, PVC, ABS, plastic) a method of manufacturing a ceramic filter, characterized in that using a net, or a sponge form. The method of claim 7, wherein the carrier or nonwoven fabric includes medical, industrial, civil, and each filter type, and the material is polyester, aramid, polyphenylene sulfide, groove-acrylic, polyimide, PTFE, viscose, and A method for manufacturing a ceramic filter, characterized in that one or more selected from the group consisting of natural fibers, glass fibers, ceramic fibers, and metal fibers are selected and the ceramic slurry is supported by a doctor braid method. The method of claim 1, wherein the molded product in step e) has a circular tube shape, a radially bent tube shape, or a square tube shape. A ceramic filter, characterized in that it is manufactured by the manufacturing method of any one of claims 1 to 9.

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