KR100623362B1 - Metal-ceramic filter and its producing method - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a metal ceramic filter and a method of manufacturing the same, and in particular, one kind comprising iron powder, aluminum powder, copper powder, stainless powder, tungsten powder, cobalt powder, molybdenum powder, nickel powder, silver powder, berylnium powder, and the like. Prepared by mixing a ceramic powder, clay, pore-forming agent, a binder, and a dispersion selected from the group consisting of metals and non-ferrous metals selected from the group consisting of silicon carbide, alumina, silimite, kaolin, silica, titania, and diatomaceous earth The present invention relates to a metal ceramic filter and a method of manufacturing the same, which are produced by carrying out molding of a slurry on a carrier, followed by drying and sintering the shaped molding.

The metal ceramic filter of the present invention and its manufacturing method are low in manufacturing cost, easy to manufacture method, at the same time easy to change the shape and production of large filters, relatively excellent in the wear resistance, heat resistance, and porosity control range It can have various functionalities depending on the effect and the selected raw materials.

Filter, ceramic, clay, support, metal ceramic filter, metal powder, nonferrous metal powder

Description

Metal ceramic filter and its manufacturing method {METAL-CERAMIC FILTER AND ITS PRODUCING METHOD}

1 is a cross-sectional view of one embodiment of a molding die used in the method of manufacturing a metal ceramic filter of the present invention.

Figure 2 is a photograph of a round tube metal ceramic filter manufactured by one embodiment of a method of manufacturing a metal ceramic filter of the present invention.

Figure 3 is a photograph of a radial bending tube metal ceramic filter manufactured by one embodiment of a method of manufacturing a metal ceramic filter of the present invention.

4 is a photograph of various types of metal ceramic filters manufactured by one embodiment of a method of manufacturing a metal ceramic filter of the present invention.

5 is a photograph of a metal ceramic filter assembled with an upper / lower cap manufactured by one embodiment of a method of manufacturing a metal ceramic filter of the present invention.

6 is a scanning electron micrograph of a metal ceramic filter manufactured according to an embodiment of the method of manufacturing a metal ceramic filter of the present invention.

7 is a photograph showing a metal ceramic filter having an extended length manufactured according to an embodiment of the present invention.

8 is a photograph showing an embodiment in which a metal ceramic filter manufactured according to an embodiment of the present invention is mounted on a dust collector.

The present invention relates to a metal ceramic filter and a method of manufacturing the same, and more particularly, the manufacturing cost is low, the manufacturing method is easy, and at the same time, the shape change and the production of large filters are easy, and the wear resistance, heat resistance, brittleness, The present invention relates to a metal ceramic filter having a relatively excellent functionality and porosity control range, and a method of manufacturing the same.

As the industry develops, the harmful substances such as dust, soot, waste gas, smoke, and volatile organic chemicals (VOC's) generated in each industrial process are increasing. Therefore, in order to prevent the emission of such pollutants, some polymer filters are used, but polymer filters have weak problems in heat resistance, chemical resistance, abrasion resistance, and flame resistance. In other words, polyester shrinks at 150 ° C, and PTFE (Teflon), which has excellent heat resistance, has only heat resistance of up to 250 ° C. The atmosphere of the process using an industrial filter is dust, various waste gases, and moisture. At the same time, it is a harsh environment, and most polymer nonwoven filters such as polyester, polypropylene, acrylic, polyamide, polyimide, and glass fiber can be used to jet dust or dust off the filter surface. When the dust falls, the surface wear of the filter by the dust is severe, which not only destroys the filter and shortens the cycle of use of the filter, but also causes sparks during the combustion process of each industry. Pit, filter, waste incinerator, boiler, coal-fired power plant, coal gasification complex In the former case, there is a problem that the exhaust gas is exposed to the air, so that it is contrary to the tightening environmental regulations.

Therefore, in order to solve these problems, the development of metal ceramic filters has been made. The metal ceramic filters have much better heat resistance, chemical resistance, and abrasion resistance than polymer filters, and in particular, excellent support of heat resistance, thermal conductivity, and selective catalysts. It is excellent in ability, excellent durability, etc., and thus it is not necessary to separately install a cooling device in the exhaust device, which has the advantage of reducing installation and maintenance costs.

In the case of the conventionally developed ceramic filter, the most common method is to use a tube form using ceramic fiber by vacuum molding or compression molding, which is relatively excellent in filtration efficiency and back pressure characteristics but is expensive to manufacture. In addition, due to the deterioration of the ceramic fiber when using for a long time, not only the filter efficiency is lowered, but also the filtration efficiency is reduced, and the ceramic fiber is broken when the dust of the outer wall is blown back by spraying the compressed air during the regeneration of the filter. There is a problem in that the secondary fiber is generated by the ceramic fiber is included in the exhaust gas during normal operation and discharged.

In addition, in the manufacturing process, the vacuum forming process is expensive to manufacture the vacuum chamber and the vacuum pump, and is limited by the size of the ceramic filter that can be manufactured according to the size limitation of the vacuum chamber, Because of the size limitation of the ceramic filter, there is a problem that large filters cannot be manufactured, and the production cost is high due to a high fixed cost because the mold must be changed every fixed amount due to severe wear due to the use of ceramic materials.

In addition to the vacuum molding method, compression molding methods such as extrusion molding, press molding, and hydrostatic pressure molding have been developed, but even in this case, mold manufacturing is essential when manufacturing and a pressurizing device is required, thus increasing the manufacturing cost and manufacturing cost. Not only is it not easy, but once the mold is determined, it is not easy to change the manufacturing shape, it is difficult to produce large filters. In addition, in the case of the molding method, since the molding by the pressure method, the porosity is low, the breathability is lowered, there is a problem that increases the pressure loss when passing through the filter.

In order to solve the problems of the prior art as described above, the present invention by wet mixing a variety of metal powder and non-ferrous metal powder having a variety of properties with ceramic powder has excellent durability, wear resistance and heat resistance, and have a relatively wide porosity control range It is an object of the present invention to provide a low weight metal ceramic filter capable of supporting an antistatic, selective exhaust gas reaction catalyst.

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

Another object of the present invention is to provide a metal ceramic filter that can maximize the filtration area of the filter by changing the shape in a predetermined space to maximize the dust collection efficiency.

In order to achieve the above object, the present invention

a) i) 25 to 60 weight of metal powder and nonferrous metal powder selected from iron powder, aluminum powder, copper powder, stainless powder, tungsten powder, cobalt powder, molybdenum powder, nickel powder, silver powder, berylnium powder, etc. part;

Ii) 25 to 60 parts by weight of ceramic powder selected from at least one selected from the group consisting of silicon carbide, alumina, silimite, kaolin, silica, titania and diatomaceous earth;

Iii) 10 to 40 parts by weight of clay;

Iii) 5 to 40 parts by weight of pore-forming agent;

Iii) 1 to 20 parts by weight of the binder; And

Iii) 20 to 60 parts by weight of the dispersion

Mixing to prepare a slurry;

b) preparing a molding by supporting the slurry prepared in step a) on a support;

c) drying the molded product carrying the slurry in step b); And

d) sintering the molded article dried in step c)

It provides a method of manufacturing a metal ceramic filter comprising a.

The present invention also provides a metal ceramic filter manufactured by the above method.

Hereinafter, the present invention will be described in detail.

The metal ceramic filter of the present invention is carbon powder, non-ferrous metal and carbonized powder selected from iron powder, aluminum powder, copper powder, stainless powder, tungsten powder, cobalt powder, molybdenum powder, nickel powder, silver powder, berylnium powder and the like. A slurry prepared by mixing at least one ceramic powder selected from the group consisting of silicon, alumina, silimite, kaolin, silica, titania, and diatomaceous earth, clay, pore-forming agent, binder, and dispersion liquid was formed by supporting it on a carrier. After that, the molded molding is characterized in that it is produced by drying and sintering.

Referring to the metal ceramic filter manufacturing method of the present invention.

a) slurry production

This step consists of: i) metal powders and nonferrous metals selected from iron powder, aluminum powder, copper powder, stainless powder, tungsten powder, cobalt powder, molybdenum powder, nickel powder, silver powder, berylnium powder, and ii) carbonization. 25 to 60 parts by weight of ceramic powder selected from the group consisting of silicon, alumina, silimite, kaolin, silica, titania, and diatomaceous earth, i) 10 to 40 parts by weight of clay, i) 5 to 40 parts by weight of pore-forming agent And (iii) mixing 1 to 20 parts by weight of the binder, and 20 to 60 parts by weight of the dispersion, to prepare a slurry.

The metal powder of iii) and ii) ceramic powder used in the present invention are components that constitute the basic structure of the metal ceramic filter after sintering, and serve as a support for the metal ceramic filter.

As the ceramic powder, various conventional ceramic powders used in the art may be used. The metal and nonferrous metal powder may be at least one selected from iron powder, aluminum powder, copper powder, stainless powder, tungsten powder, cobalt powder, molybdenum powder, nickel powder, silver powder, berylnium powder, and nonferrous metal and ceramic powder. Silver Silicon Carbide, Alumina, Sillimanite Group (Al ₂ O ₃ · SiO ₂ ), Kaolin Group, Al ₂ O ₃ · 2SiO ₂ · 2H ₂ O, Silica (SiO ₂ ), Titania, or Diatomite It is preferable to use such as copper powder, more preferably copper powder, alumina, silicon carbide or a mixture thereof.

The metal and nonferrous metal powder and the ceramic powder may use a component having various particle sizes, certain components may have the same particle size, and may be used by mixing the same components having different particle sizes, in particular, 0.001 ㎛ to It is preferable that it is a particle size of 1 mm. When the particle sizes of the metal and nonferrous metal powder and the ceramic powder are within the above ranges, pore formation and mechanical strength of the metal ceramic filter may be improved.

The metal and nonferrous metal powder is preferably included in the slurry composition in 25 to 60 parts by weight, and the ceramic powder is preferably included in the slurry composition in 25 to 60 parts by weight, more preferably 30 to 50 parts by weight. When the content is in the above range, there is an effect that can maintain the physical strength and shape of the metal ceramic filter, and at the same time has the effect of significantly improving the filtration efficiency. In addition, it is possible to prevent distortion and cracking during sintering and to increase wear resistance of the metal ceramic filter.

(Iii) The metal and nonferrous metal ii) ceramic raw material used in the present invention is a component that forms the basic structure of the metal ceramic filter after sintering and serves to facilitate bonding between ceramic particles during sintering.

Iii) metal and nonferrous metal ii) ceramic raw materials may use a component having a variety of particle size, in particular, iii) metal and nonferrous metal ii) ceramic raw material may have the same particle size, respectively iii) metal and nonferrous metal Ii) It is a matter of course that a ceramic raw material can be mixed and used, It is preferable that it is especially the particle size of 0.001 micrometer-1 mm. If the particle size of the metal and non-ferrous metal ii) ceramic raw material is within the above range, pore formation and mechanical strength of the metal ceramic filter can be improved.

(Iii) The metal and nonferrous metal ii) ceramic raw materials are preferably included in the slurry composition in an amount of 25 to 60 parts by weight, and more preferably in an amount of 10 to 50 parts by weight of the metal and nonferrous metal ii) ceramic raw materials, respectively. When the content is in the above range, there is an effect that can maintain the physical strength and shape of the metal ceramic filter, and at the same time there is an effect that can significantly improve various functionalities and filtration efficiency. In addition, it is possible to prevent distortion and cracking during sintering and to increase the durability and wear resistance of the metal ceramic filter.

The pore-forming agent of i) used in the present invention functions to form pores of the metal ceramic filter after sintering.

The pore-forming agent may be carbon, activated carbon, wood powder, sawdust, salt, naphthalene, talc or the like.

Of course, the pore-forming agent can be used a component having a variety of particle size, it is particularly preferred that the particle size of 0.001 ㎛ 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 mechanical strength of the appropriate size of the metal ceramic filter.

The pore-forming agent is burned away during the sintering process to form pores of the metal ceramic filter, the content of which is preferably included in the slurry composition 5 to 40 parts by weight, more preferably 10 to 25 parts by weight. If the content is within the above range, there is an effect that can be completely burned during sintering to effectively form pores of the metal ceramic filter.

The binder of i) used in the present invention functions to form a slurry and a support.

The binder may be a conventional organic binder, an inorganic binder, or a mixture thereof, and in particular, it is preferable to use a mixture of an inorganic binder and an organic binder.

Specifically, the binder may be an inorganic binder of frit, barium carbonate (BaCO ₃ ), or mono aluminum phosphate (MAP), a water binder, polyvinyl butyral, polyvinyl alcohol, or polyvinylacetate. An organic binder may be used, and it is particularly preferable to mix frit and water pool.

The binder is preferably contained in 1 to 20 parts by weight, more preferably 5 to 10 parts by weight of the slurry composition. If the content is in the above range, there is an effect that can effectively combine the slurry and the support.

The dispersion of iii) used in the present invention may vary depending on the type of the binder, and it is particularly preferable to use water or alcohol.

The dispersion is preferably contained in 20 to 60 parts by weight, more preferably 20 to 30 parts by weight of the slurry composition. When the content is in the above range, it is possible to effectively mix each component included in the slurry, there is an effect that the slurry can be effectively bonded to the support to maintain the proper viscosity.

Such metals and nonferrous metals, ceramic powders, clays, pore-forming agents, and binders may be mixed by simultaneous injection into a dispersion, or may be separately mixed and mixed at regular intervals. In particular, the mixing of the components is a mixture of metal and nonferrous metal powder, ceramic powder, clay, pore-forming agent, and inorganic binder (mix only when using inorganic binder) in the dispersion, and then mixing the organic binder in the mixture of Better for convenience.

Mixing time of the mixture is preferably carried out for 1 to 4 hours.

The mixed slurry as described above is more preferably aged for at least 1 hour for stabilization.

b) support

This step is to prepare a molding by supporting the slurry prepared in step a) on a carrier.

The carrier used in the present invention may vary in size depending on the size of the metal ceramic filter to be manufactured.

The carrier may be any porous structure capable of supporting a slurry, and in particular, it is more preferable to use a nonwoven fabric, a felt, a woven fabric, or a sponge for ease of application.

The nonwoven fabric combines short fibers with an adhesive based on a web or sheet-like fiber aggregate, or makes fibers intertwine with thermoplastic fibers, or entangles the fibers by needle punching or sewing. In the form of polyester, aramid, polyphenylenesulfide, home-acrylic, polyimide, polytetrafluoroethylene (PTFE), viscose biscose), natural fibers, glass fibers, ceramic fibers, metal fibers and the like are preferably used.

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

The supporting step of this step may be applied to the slurry on the carrier, immersed the carrier in the slurry, or spraying (spray) the slurry on the carrier, it is possible to adhere, fusion, It may be made to form a metal ceramic filter to be produced through sewing, self-bonding or molding using a molding mold, and then carry a slurry.

In particular, a sufficient amount of metal, non-ferrous metal powder, ceramic powder in the carrier, and the immersion and squeeze the carrier in a slurry solution two or three times to be seated, or apply or spray the slurry on the carrier It is better to repeat the squeezing process 2-3 times so that the slurry solution is sufficiently loaded on the carrier.

When the carrier is chopped or molded to a predetermined size and then supported on a slurry, the drying step may be immediately performed. If the carrier is not chopped or molded to a predetermined size, the step of forming the carrier to a shape suitable for the purpose is performed. It can be carried out further to produce a molding of a certain form.

The support on which the slurry is supported may be variously molded into a desired shape according to the purpose. In particular, the support may be closely adhered to a molding frame having a round tube, a radial bending tube, or a square tube, and clamped. It can be fixed to a round tube shape, a radial tube shape, a square tube shape or the like. When manufacturing the metal ceramic filter of the radial bending tube shape using the radial bending tube-shaped molding frame as shown in Figure 1 can be applied to the same where the circular tube is applied while maximizing the filtration area to increase the filtering efficiency There are advantages to it.

In addition, in the case of tightly coupling the carrier to the molding die, a demolding film may be added between the carrier and the mold to facilitate separation of the mold and the carrier after drying. The release film may preferably be a resin film made of rubber, urethane resin, epoxy resin, or the like, or a paper film such as kraft paper.

c) drying

This step is a step of drying the molded product carrying the slurry prepared in step b). At this time, the drying serves to prevent the shape deformation of the molding that can occur during the sintering process and the sintering preparation and sintering safely.

The drying may be carried out using a method such as natural drying, hot air drying, daylight drying, or shade drying, and in particular, it is preferable to perform infrared drying so as to shorten the drying time and to prevent deformation and cracking of the molding. .

d) sintering

This step is a step of sintering the molded article dried in step c).

The sintering can be sintered at a constant temperature by removing the mold of the dried molding and put in the sintering furnace, the temperature of the sintering furnace to the sintering temperature.

In addition, the sintering is a processing step of making the body of the filter by cutting to the size of the metal ceramic filter to be prepared as shown in Figure 5; And an upper cap having a lower cap and a jaw supporting wing that fits to the outer diameter of the body by drying the slurry on a carrier, and the upper and lower caps are assembled with ceramic adhesive to block the lower portion, and the upper portion is a wing shape. After the assembly step of assembling in the form of open to the further may be carried out, it may be sintered.

The sintering may proceed with sintering by setting an appropriate sintering temperature according to the composition and ratio of the slurry. It is preferable to raise the temperature at a rate of ˜3 ° C./min. In particular, at a temperature of 150 ° C./450° C., it is preferable to slowly increase the temperature at a rate of 0.5-1 ° C./min. As a result, the temperature is raised to a sintering temperature of 300 ~ 1,800 ℃ to maintain for 2 to 48 hours to complete the sintering.

The final metal ceramic filter manufactured according to the above method may be manufactured in various forms as shown in FIGS. 2 to 5, and may be manufactured in a structure having high porosity as shown in FIG. 6. In addition, as shown in FIG. 7, two or more metal ceramic filters may be adhered with an adhesive, and used as a metal ceramic filter having an extended length. In this case, a pipe having a smaller size than the inner circumferential surface of the metal ceramic filter may be introduced between the metal ceramic filters.

The adhesive may, of course, use a conventional adhesive used in the art, and preferably use a metal ceramic adhesive.

In addition, the metal ceramic filter of the present invention after further applying a functional material to the inside or outside of the (c) dried metal ceramic filter, or (d) sintered metal ceramic filter to improve the functionality of the metal ceramic filter, It may further comprise a step of drying, the application of the functional material can be applied to a variety of known coating methods that can be appropriately coupled between the functional material and the metal ceramic filter, of course, (d) after sintering After application and drying of the functional material, the sintering step may be further included.

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

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

As described above, the method of manufacturing the metal ceramic filter according to the present invention is low in manufacturing cost, easy to manufacture, and at the same time, it is easy to change the shape and produce a large filter, and has a relatively low wear resistance, heat resistance, and porosity control range. There is an excellent advantage.

In addition, the present invention provides a metal ceramic filter manufactured as described above, the metal ceramic filter of the present invention can be used as a dust collection filter of various dust collection equipment, as shown in Figure 8, in particular, incinerator, dust collector dust collector, engine It can be used for dust collector of exhaust gas, catalyst carrier which is an air purifier of automobile exhaust gas, or volatile organic compound (VOC's) removal apparatus by photocatalytic action in an air cleaner. The metal ceramic filter may also be manufactured in the shape of a round, square, or radially bent tube, depending on its application.

Hereinafter, preferred examples are provided to help understanding of the present invention, but the following examples are merely to illustrate the present invention, and the scope of the present invention is not limited to the following examples.

EXAMPLE

Example 1

50 parts by weight of water is added to the mixer, and 40 parts by weight of copper (Cu), 40 parts by weight of alumina (Al ₂ O ₃ ), 25 parts by weight of clay, 25 parts by weight of activated carbon, and frit (VA950, Duklim material) with an inorganic binder. ) 5 parts by weight was added and mixed. 5 parts by weight of water pool was added to the mixture by an organic binder, and then mixed in a mixer for 2 hours to prepare a slurry solution.

The slurry solution prepared above was applied so as to be sufficiently supported on a nonwoven fabric having a width of 1000 mm x 1500 mm x thickness 8 mm.

Then, after forming a mold of the round tube form of PVC, bonding the demolding film on the surface of the mold, and wound the non-woven fabric immersed in the slurry solution in the form of a mold to produce a molding, the temperature of 30 ~ 90 ℃ Hot air dried at 1 hour.

After removing the mold and demolding film from the granulated and dried molded product, the molded product is put in an electric furnace to increase the temperature at a rate of 1 ~ 3 ℃ / min up to room temperature ~ 150 ℃, 0.5 ~ 1 ℃ / min of up to 150 ~ 450 ℃ Slowly warmed up at a rate, and maintained at a temperature of 900 ~ 1,300 ℃ for 2 hours to complete the sintering.

The weight of the metal ceramic filter manufactured as described above was reduced by 10 to 80% compared to before and after sintering, and it was confirmed that shrinkage of about 1 to 25% occurred. 2 is a photograph showing a circular filter of a metal ceramic filter manufactured according to Example 1; In addition, Figure 6 is a photograph taken with a scanning electron microscope of the metal ceramic filter prepared in Example 1.

Example 2

A metal ceramic filter was manufactured in the same manner as in Example 1, except that silicon carbide (SiC) was substituted for alumina and aluminum was used instead of copper in Example 1.

Example 3

Except that in Example 1, 30 parts by weight of iron in place of copper, 25 parts by weight of alumina and 25 parts by weight of silicon carbide (SiC) in place of alumina (Al ₂ O ₃ ) parts by weight is the same as in Example 1 The metal ceramic filter was manufactured by the method.

Example 4

The same method as in Example 1 was performed except that the nonwoven fabric immersed in the slurry solution was formed by using the molding die in the form of a radial bending tube (FIG. 1) instead of the molding die in the circular tube form. To prepare a metal ceramic filter as shown in FIG.

Example 5

The metal ceramic filter was carried out in the same manner as in Example 1 except that the nonwoven fabric immersed in the slurry solution was formed by using the square tube-shaped mold instead of the round tube-shaped mold. Prepared.

Example 6

In Example 1, a nonwoven fabric immersed in a slurry solution was formed by using a molding die in the form of a radial bending tube, followed by hot air drying.

Then, the dried molding is cut to form the body of the filter, and the lower cap and the upper cap having the shape of the chin support wing that fit the outer diameter of the body are precipitated or applied to the nonwoven fabric with the same slurry solution as above, followed by drying. Prepared. At this time, the body and the upper and lower caps were assembled with a metal ceramic adhesive, the lower part was blocked, and the upper part was assembled and dried in the form of open wings.

Thereafter, the metal ceramic filter was manufactured by sintering in the same manner as in Example 1.

Through Examples 1 to 6, a large metal ceramic filter having a diameter of 100 mm or more and a size of 1 m or more can be manufactured, has a high porosity of 60% or more, and can reduce the wall thickness of the filter to about 2 to 3 mm. The weight of the filter can be lowered, the strength of the filter can be increased, and it can be confirmed that it has excellent heat resistance of at least 1000 ° C.

Example 7

After preparing two metal ceramic filters of the round tube type prepared in Example 1, attached to the adhesive to prepare a metal ceramic filter extended in length. 7 is a photograph showing a metal ceramic filter having an extended length manufactured in Example 7.

The manufacturing method of the metal ceramic filter according to the present invention does not require an expensive mold manufacturing and does not require a pressurizing device or a vacuum device to manufacture the metal ceramic filter, and thus, the manufacturing cost of the metal ceramic filter is low, and the manufacturing method is easy. In addition, it is easy to change the shape, it is possible to produce a large filter to the extent that the size of the sintering furnace allows. In addition, since there is no pressurization or vacuum process, the porosity can be controlled relatively broadly, and it can be manufactured by adjusting the pore size with a small deviation by selecting it in the range of 0.001 ~ 5 mm according to the density of the carrier, the size and the amount of the pore-forming agent. And, the porosity of 60% or more can be molded, and the metal ceramic filter manufactured according to the low weight porous filter can be produced.

In addition, the present invention is easy to change the shape, it is easy to manufacture a complex shape can be produced a metal ceramic filter that can maximize the filtration area of the filter in a certain space. In addition, the metal ceramic filter of the present invention is excellent in durability, wear resistance and heat resistance can be used under high temperature and high pressure.

In addition, the metal ceramic filter of the present invention does not require a heat exchanger device through fluid cooling at a high temperature, and has a porous structure of 60% or more, is very light, dust collection efficiency is 99.8% or more, and dust collection is possible at a faster filtration rate than conventional dust filters. It does not have any deterioration or damage of the filter even at high temperature and high pressure, and there is no fear of fire due to the occurrence of sparks, and it is possible to support the selective catalyst of exhaust gas on the wall of the metal ceramic filter, so it is possible to manufacture waste incinerator, cremator, boiler, cement manufacturing process, It can be easily applied to coal fired power plants and coal gasification combined cycle power plants.

Claims (15)

a) 내지) 25 to 60 weight of metal powder and nonferrous metal powder selected from iron powder, aluminum powder, copper powder, stainless powder, tungsten powder, cobalt powder, molybdenum powder, nickel powder, silver powder, berylnium powder, etc. part; Ii) 25 to 60 parts by weight of ceramic powder selected from at least one selected from the group consisting of silicon carbide, alumina, silimite, kaolin, silica, titania and diatomaceous earth; Iii) 10 to 40 parts by weight of clay; Iii) 5 to 40 parts by weight of pore-forming agent; Iii) 1 to 20 parts by weight of the binder; And Iii) 20 to 60 parts by weight of the dispersion Mixing to prepare a slurry; b) preparing a molding by supporting the slurry prepared in step a) on a support; c) drying the molded product carrying the slurry in step b); And d) sintering the molded article dried in step c) Method for producing a metal ceramic filter comprising a. The method of claim 1, The method of manufacturing a metal ceramic filter, characterized in that further comprising the step of forming a support on which the slurry is supported before or after the step b) in a predetermined form. The method of claim 1, (I) copper, iron, etc. of the metal and nonferrous metal powders of step a); and ii) the ceramic powder is alumina, silicon carbide, or a mixture thereof. The method of claim 1, I) the pore forming agent of step a) is selected from the group consisting of carbon, activated carbon, wood powder, salt, naphthalene, and talc. The method of claim 1, (B) The inorganic binder or MAP (mono aluminum phosphate), water binder, and polyvinyl butyral selected from the group consisting of frit and barium carbonate (BaCO ₃ ). And an organic binder selected from the group consisting of polyvinyl alcohol and polyvinylacetate. The method of claim 1, Preparation of the metal-ceramic filter, characterized in that the carrier of step b) is a non-woven fabric, felt, woven fabric, or sponge that supports the slurry of step a), forming, drying, processing, assembling, sintering, etc. Way. The method of claim 6, The nonwoven fabric is selected from the group consisting of polyester, aramid, polyphenylene sulfide, home-acrylic, polyimide, PTFE, viscose, natural fiber, glass fiber, ceramic fiber, and metal fiber of porous structure Method for producing a metal ceramic filter. The method of claim 1, The molded article of step b) is a method of manufacturing a metal ceramic filter, characterized in that the circular tube shape, radial bending tube shape, or square tube shape. The method of claim 1, The molded article of step b) is a method of manufacturing a metal ceramic filter, characterized in that the bonding member of the step b) after bonding the demolding film to the molding die. The method of claim 1, Method c) characterized in that the drying of step c) is carried out by infrared drying. The method of claim 1, Method for producing a metal ceramic filter, characterized in that the sintering step d) is raised at a rate of 0.5 to 1 ℃ / min at a temperature of 150 ~ 450 ℃. The method of claim 1, The carrier of step b) is a metal ceramic filter for forming, drying and sintering, characterized in that the slurry is made of ii) ceramic powder iii) clay except step a), and the various carriers are non-woven fabric, felt, woven fabric, or sponge. Manufacturing method. A metal ceramic filter, which is produced by the method of any one of claims 1 to 12. The method of claim 13, The metal ceramic filter is characterized in that the round, square, or radial bending tube shape. The method of claim 13, The metal ceramic filter is a metal ceramic filter, characterized in that the dust collector of the incinerator or crematorium, the engine exhaust gas dust collector, coal gasification system, boiler exhaust gas after-treatment system, automobile exhaust catalyst carrier, or volatile organic compound removal device .

Images