CN112774626B - Ceramic filter particle capable of being regenerated by microwaves, preparation method thereof and regeneration method thereof - Google Patents

Ceramic filter particle capable of being regenerated by microwaves, preparation method thereof and regeneration method thereof Download PDF

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CN112774626B
CN112774626B CN202011513612.2A CN202011513612A CN112774626B CN 112774626 B CN112774626 B CN 112774626B CN 202011513612 A CN202011513612 A CN 202011513612A CN 112774626 B CN112774626 B CN 112774626B
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parts
powder
ceramic filter
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CN112774626A (en
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席宗隆
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Wuhu Yidao Precision Machinery Co ltd
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Jiangsu Shoubiao Environmental Protection Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/20—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising free carbon; comprising carbon obtained by carbonising processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/02—Loose filtering material, e.g. loose fibres
    • B01D39/06—Inorganic material, e.g. asbestos fibres, glass beads or fibres
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/06—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04
    • B01J20/08—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising oxides or hydroxides of metals not provided for in group B01J20/04 comprising aluminium oxide or hydroxide; comprising bauxite
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/02—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material
    • B01J20/10—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof comprising inorganic material comprising silica or silicate
    • B01J20/16—Alumino-silicates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/28—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties
    • B01J20/28014—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof characterised by their form or physical properties characterised by their form
    • B01J20/28016—Particle form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J20/00—Solid sorbent compositions or filter aid compositions; Sorbents for chromatography; Processes for preparing, regenerating or reactivating thereof
    • B01J20/30—Processes for preparing, regenerating, or reactivating
    • B01J20/34—Regenerating or reactivating
    • B01J20/3441—Regeneration or reactivation by electric current, ultrasound or irradiation, e.g. electromagnetic radiation such as X-rays, UV, light, microwaves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
    • B01D2253/10—Inorganic adsorbents

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  • Analytical Chemistry (AREA)
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  • Inorganic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
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  • General Health & Medical Sciences (AREA)
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Abstract

The application discloses a ceramic filter particle capable of being regenerated by microwaves, a preparation method and a regeneration method thereof, wherein the ceramic filter particle capable of being regenerated by microwaves comprises the following raw material components: 20-25 parts of aluminum oxide powder, 20-25 parts of high-purity silicon dioxide powder, 15-20 parts of coal activated carbon powder, 5-10 parts of zeolite powder, 5-10 parts of industrial-grade kaolin powder, 5 parts of industrial-grade anhydrous lithium chloride powder, 5 parts of monocrystalline silicon powder, 8-14 parts of sodium silicate solution, 35-40 parts of water and 0.3-0.8 part of physical foaming agent, wherein the parts are in parts by mass. The ceramic filter particles of the application have light density, good adsorption effect and high strength, and can be regenerated under the condition of microwave irradiation.

Description

Ceramic filter particle capable of being regenerated by microwaves, preparation method thereof and regeneration method thereof
Technical Field
The application relates to ceramic filter particles capable of being regenerated by microwaves, a preparation method thereof and a regeneration method thereof, and belongs to the field of regenerated filter materials.
Background
The water treatment mode comprises physical treatment, chemical treatment and biological treatment. The chemical treatment inevitably causes secondary pollution, the biological treatment cost is high, and the physical treatment is a safer treatment mode.
The polluted water source is treated through filter material adsorption as one of the physical treatment modes, and the application is relatively wide. The ceramic particle filter material has high strength and better adsorption capacity, is a filter material with ideal treatment effect, but the existing ceramic particle filter material is mostly disposable, has higher use cost and is usually only used in high-end water purification fields, such as public landscape fountain, advanced fish tank culture water purification, drinking direct drinking water purification and the like.
Disclosure of Invention
The application provides a ceramic filter particle capable of being regenerated by microwaves, a preparation method and a regeneration method thereof, and the obtained ceramic filter particle has the advantages of light density, good adsorption effect and high strength and can be regenerated under the condition of microwave irradiation.
In order to solve the technical problems, the technical scheme adopted by the application is as follows:
a microwave regenerable ceramic filter particle comprising the following raw material components: 20-25 parts of aluminum oxide powder, 20-25 parts of high-purity silicon dioxide powder, 15-20 parts of coal activated carbon powder, 5-10 parts of zeolite powder, 5-10 parts of industrial-grade kaolin powder, 5 parts of industrial-grade anhydrous lithium chloride powder, 5 parts of monocrystalline silicon powder, 8-14 parts of sodium silicate solution, 35-40 parts of water and 0.3-0.8 part of physical foaming agent, wherein the parts are in parts by mass.
The purity of the high purity silica powder was 99.9%. The percentages in the present application are not particularly specified.
The applicant has found that the above alumina powder and the high purity silica powder serve as main aggregate, and play a role in reinforcing the main structure in the particles; the coal activated carbon powder, the zeolite powder and the industrial-grade kaolin powder are used as adsorption materials, play an adsorption role in the particles, enhance the adsorption capacity of ceramic particles, form tiny cavities by adopting a physical foaming technology during the preparation of the ceramic particles, and further optimize the adsorption capacity by matching with the adsorption materials; industrial anhydrous lithium chloride powder and monocrystalline silicon powder are used as microwave excitation materials, and ceramic particles are rapidly heated and released under the microwave condition; the water and sodium silicate solution are used as the adhesive, and the physical foaming agent is used for foaming and foaming, so that the adsorption capacity of ceramic particles is improved; the light, high-porosity and high-adsorption granular material is obtained through the synergistic promotion of the materials, and the granular material can be pyrolyzed and regenerated under the microwave irradiation condition.
In order to further improve the porosity and structural strength of the filter material, preferably, the fineness of the aluminum oxide powder is 150-200 meshes; the fineness of the high-purity silicon dioxide powder is 600-800 meshes; the fineness of the coal active carbon powder is 150-200 meshes; the fineness of the zeolite powder is 400-600 meshes; the fineness of the technical grade kaolin powder is 4000.
The adsorption iodine value of the microwave regenerated ceramic filter particles is 600-700mg/g. Is equivalent to the adsorption iodine value of coconut shell honeycomb activated carbon.
The compressive strength of the ceramic filter particles capable of being regenerated by microwaves is more than 4.5MPa. The strength which can not be damaged in the transportation and replacement process can be met.
The preparation method of the microwave-regenerable ceramic filter particles comprises the following steps:
1) Putting the sodium silicate solution, water and a physical foaming agent into a foaming machine for liquid foaming;
2) Adding aluminum oxide powder, high-purity silicon dioxide powder, coal activated carbon powder, zeolite powder, industrial grade kaolin powder, industrial grade anhydrous lithium chloride powder and monocrystalline silicon powder into the material obtained in the step 1), stirring and foaming to form foaming slurry;
3) Pouring the foaming slurry obtained in the step 2) into a particle mould, then baking the particle mould for 2-6 minutes under the condition of microwave irradiation,
4) Taking out the particles in the particle mould in the step 3), and preserving the heat for 5-8 hours in a 40-50 environment;
5) Calcining the particles obtained in the step 4) to obtain the ceramic filter particles capable of being regenerated by microwaves.
The raw material of the application has the comprehensive density of 1100kg/m 3 About, the material density of the microwave regenerated ceramic filter particles prepared by the preparation process of the application is 400-450kg/m 3 Bulk density of 300-350kg/m 3 . The density is relatively visual data in the filter material industry, and the low density indicates that the particles have a porous structure and are easier to adsorb.
In the step 2), the mixture is foamed by stirring for about 5 minutes.
In the step 3), the size of the granulating particle size of the granulator is adjustable, and the application preferably has three specifications of 10mm,20mm and 30mm of particle size.
In the step 3), the particles in the particle mould are baked for 2-6 minutes under the condition of microwave irradiation, and the early solidification can be completed, wherein the principle is that the sodium silicate solution can be solidified and solidified under the condition of microwaves for 2-6 minutes, so that the ceramic particles have the strength of being taken out from the mould and carried; the preferred microwave irradiation temperature is 40-50 ℃.
In order to further ensure the structural strength of the ceramic filter particles, in step 5), the calcination is as follows: and (3) raising the temperature to 800+/-30 ℃ for 25-35 minutes, preserving the heat for 50 minutes, then lowering the temperature from 800+/-330 ℃ to 40-50 ℃ for 35-45 minutes, and discharging to obtain the ceramic filter particles capable of being regenerated by microwaves.
The regeneration method of the ceramic filter particles capable of being regenerated by microwaves is carried out for 6-8 hours under the microwave irradiation condition of 800-900 ℃.
The technology not mentioned in the present application refers to the prior art.
The ceramic filter particles capable of being regenerated by microwaves can be placed into a microwave high-temperature pyrolysis furnace to be regenerated and activated at a high temperature of 800-900 ℃ (furnace temperature), the composite ceramic particles are uniformly mixed with microwave excitation materials, the ceramic particles emit heat to reach 1000 ℃ under the microwave condition, so that radiation with heat from inside to outside is formed, organic matters adsorbed in the particles are easier to evaporate and release, the activity of the particle materials is recovered, the ceramic particles can be recycled, the use cost of the ceramic particles can be well reduced, the water purification cost is further reduced, and meanwhile, the heat release of the particles is also greatly improved the thermal efficiency of an activation furnace, so that the use cost of the ceramic particles is greatly reduced; the filter material and the microwave filter tank are used simultaneously, so that the activation regeneration recycling can be directly completed in the microwave filter tank, the filter material is not required to be taken out and put in again, the manual work is saved, the operation is easy, and the filter material is suitable for civil use; the method can be used for small-scale residential buildings without public water and pollution discharge such as landscapes, mountain areas, seaside villas, civilian hosts, meetings and the like; the water body after purification can be used for landscape fountain, greening irrigation, cleaning and flushing and the like.
Drawings
FIG. 1 is an apparent view of the microwave-regenerable ceramic filter particles obtained in example 1;
FIG. 2 is a schematic diagram of the structure of a water purification tank in an embodiment;
FIG. 3 is a schematic cross-sectional view of FIG. 2;
in the figure, 1 is a shell, 2 is an inner cavity, 3 is a microwave emission source, 4 is a microwave waveguide, 5 is a water inlet pipe, 6 is a water outlet pipe, 7 is a water outlet pipe, 8 is a filter element, and 9 is an aluminum silicate asbestos layer.
Detailed Description
For a better understanding of the present application, the following examples are further illustrated, but are not limited to the following examples.
In each example, aluminum oxide powder purchased from Yaobang friction material mill, changzhou, with fineness of 150-200 mesh; high purity silica powder available from quartz technologies, inc., of Lianggang, fineness 600-800 mesh; coal activated carbon powder purchased from the company of the water purification materials of Jinjiang, consolidated city, and the fineness is 150-200 meshes; zeolite powder, available from Changzhou, lehuang commercial, inc., fineness 400-600 mesh; industrial grade kaolin powder is purchased from Kaolin Limited company of Hexiang, with fineness of 4000 meshes; industrial grade anhydrous lithium chloride powder, purchased from Nanjing stonebao trade Co., ltd; monocrystalline silicon powder, available from kunshan xu crystal photovoltaic materials limited; sodium silicate solution, purchased from Jiangsu Kang Xiang industrial group Co., ltd., modulus 3.4, mass concentration 28%; physical blowing agent, available from tabbed racing rework limited, SAIDY/racing, HF30;
example 1
The raw material components of the microwave-regenerable ceramic filter particles comprise: 22 parts of aluminum oxide powder, 23 parts of high-purity silicon dioxide powder, 18 parts of coal activated carbon powder, 8 parts of zeolite powder, 7 parts of industrial-grade kaolin powder, 5 parts of industrial-grade anhydrous lithium chloride powder, 5 parts of monocrystalline silicon powder, 12 parts of sodium silicate solution, 38 parts of water and 0.5 part of physical foaming agent.
Example 2
The raw material components of the microwave-regenerable ceramic filter particles comprise: 25 parts of aluminum oxide powder, 20 parts of high-purity silicon dioxide powder, 20 parts of coal activated carbon powder, 5 parts of zeolite powder, 10 parts of industrial-grade kaolin powder, 5 parts of industrial-grade anhydrous lithium chloride powder, 5 parts of monocrystalline silicon powder, 10 parts of sodium silicate solution, 40 parts of water and 0.5 part of physical foaming agent.
In the above examples, the method for preparing the microwave-regenerable ceramic filter particles comprises the following steps:
1) Putting the sodium silicate solution, water and a physical foaming agent into a foaming machine for liquid foaming;
2) Adding aluminum oxide powder, high-purity silicon dioxide powder, coal activated carbon powder, zeolite powder, industrial grade kaolin powder, industrial grade anhydrous lithium chloride powder and monocrystalline silicon powder into the material obtained in the step 1), stirring and foaming for about 5 minutes to form foaming slurry;
3) Pouring the foaming slurry obtained in the step 2) into a particle mould, then baking the particle mould for 5 minutes at 45 ℃ under the condition of microwave irradiation,
4) Taking out the particles in the particle mould in the step 3), and preserving the heat for 5-8 hours at the temperature of 40 ℃;
5) Calcining the particles obtained in the step 4), wherein the calcining conditions are as follows: the temperature is raised to 800 ℃ for 30 minutes, the temperature is maintained at 800 ℃ for 50 minutes, then the temperature is lowered from 800 ℃ to 40-50 ℃ for 40 minutes, and the ceramic filter particles capable of being regenerated by microwaves are obtained after discharging, as shown in figure 1, and the filter material with the void structure is formed.
Respectively adjusting particle dies, and respectively preparing the ceramic filter particles with the particle diameters of 10mm,20mm and 30mm in the examples 1-2 into three specifications of microwave-regenerable ceramic filter particles; tested, the density of each granular material is 400-450kg/m 3 Bulk density of 300-350kg/m 3 The particles are low-density particles, which show that the particles have a porous structure and are easy to adsorb; the adsorption iodine value of each particle is 600-700mg/g, which is equivalent to that of the coconut shell honeycomb activated carbon; the porosity of each particle reaches 40%, the compressive strength is greater than 4.5MPa, and the strength which cannot be damaged in the transportation and replacement process can be met; and (3) pyrolyzing the adsorption saturated microwave-regenerable ceramic filter particles for 8 hours under the microwave irradiation condition of 800-900 ℃ to recover the adsorption effect by more than 91.2%.
As shown in fig. 2-3, a water purifying tank body of a civil small-scale microwave renewable filtering material comprises a shell, an inner cavity, a microwave emission source (a three-star OM75P (11) water-cooled magnetron, 1 kw/number), a microwave waveguide, a water inlet pipe, a water outlet pipe and an air outlet pipe; the inner cavity is arranged at the inner side of the shell and coaxially arranged with the shell, and the inner cavity and the transverse of the shellThe sections are regular hexagons, and the density between the inner cavity and the shell is 0.4-0.5t/m 3 Aluminum silicate asbestos layer (purchased from gallery spread insulation limited); a renewable filter element (prepared in the example 1) is arranged in the inner cavity; the microwave emission source is arranged on the side wall of the shell, one end of the microwave waveguide is communicated with the inner cavity, and the other end of the microwave waveguide is connected with the microwave emission source; the water inlet pipe, the water outlet pipe and the air outlet pipe are respectively arranged at the upper end and the lower end of the inner cavity, and the air outlet pipe is arranged at the top of the inner cavity.
The side surfaces of the shell are in one-to-one correspondence with the side surfaces of the inner cavity, and the side surfaces of the shell are parallel to the side surfaces of the corresponding inner cavity; the three groups of wave emission sources are respectively arranged on three sides of the shell, and the three sides on which the wave emission sources are arranged are not adjacent; four wave emission sources are arranged in each group, and 12 microwave emission sources are arranged in total; the microwave waveguide is made of 310S stainless steel; the filter element in the inner cavity is a ceramic filter element, ceramic granules used by the ceramic filter element are graded ceramic granules, the graded ceramic granules comprise 20% of ceramic granules with the grain diameter of 10mm, 20% of ceramic granules with the grain diameter of 20mm and 60% of ceramic granules with the grain diameter of 30mm, and the ceramic granules are prepared in the embodiment 1; the inner cavity is made of 310S stainless steel, and the outer shell is made of 304 stainless steel. The radius of the inner cavity circumcircle is 400mm, and the radius of the outer shell circumcircle is 650mm. The device has the advantages of 1800mm total height, 1300mm total width, 1150mm total length, small occupied area, small size, flexibility and convenient carrying, and can be used for small-scale residential buildings without public water and pollution discharge such as landscapes, mountain areas, seaside villas, civilian hosts, meetings and the like, and the purified water body is used for landscape fountain, greening irrigation, cleaning flushing and the like.
When in use, the water to be treated is conveyed by the power pump, enters the inner cavity through the water inlet pipe, is filtered by the filter element in the inner cavity, and is discharged from the water outlet pipe after reaching standards (reaching industrial water standards), and the water after water purification can be used for landscape fountain, greening irrigation, cleaning and flushing and the like; when the water discharged from the water outlet pipe does not reach the standard, stopping water inlet, starting a microwave emission source, and pyrolyzing pollutants on the filter element by utilizing energy generated by microwave emission to achieve the effect of activation; then the water inflow is started again, the treatment is continued, and the circulation is performed. The water purifying amount per day is 1.5-2 tons, the requirements of small civil facilities can be met, the water purifying device is continuously used for 30-40 days for regeneration and activation once, the activation time is 8 hours each time, only all microwave emission sources are required to be started, the operation is simple and convenient, the filtration and the activation are integrated, the on-site activation of on-site water purification is realized, the disassembly and the assembly are not needed during the activation, and the operation is simple and convenient; no medicament and biological bacteria are needed to be put in, the cost is low, and no secondary pollution is caused.

Claims (7)

1. A microwave regenerable ceramic filter particle, characterized by: the raw material components comprise: 20-25 parts of aluminum oxide powder, 20-25 parts of high-purity silicon dioxide powder, 15-20 parts of coal activated carbon powder, 5-10 parts of zeolite powder, 5-10 parts of industrial-grade kaolin powder, 5 parts of industrial-grade anhydrous lithium chloride powder, 5 parts of monocrystalline silicon powder, 8-14 parts of sodium silicate solution, 35-40 parts of water and 0.3-0.8 part of physical foaming agent, wherein the parts are in parts by mass;
a method for preparing microwave-regenerable ceramic filter particles comprising the steps of:
1) Putting the sodium silicate solution, water and a physical foaming agent into a foaming machine for liquid foaming;
2) Adding aluminum oxide powder, high-purity silicon dioxide powder, coal activated carbon powder, zeolite powder, industrial grade kaolin powder, industrial grade anhydrous lithium chloride powder and monocrystalline silicon powder into the material obtained in the step 1), stirring and foaming to form foaming slurry;
3) Pouring the foaming slurry obtained in the step 2) into a particle mould, then baking the particle mould for 2-6 minutes under the condition of microwave irradiation,
4) Taking out the particles in the particle mould in the step 3), and preserving the heat for 5-8 hours at the temperature of 40-50 ℃;
5) Calcining the particles obtained in the step 4) to obtain ceramic filter particles capable of being regenerated by microwaves;
in step 5), calcination is as follows: and (3) heating to 800+/-30 ℃ for 25-35 minutes, preserving heat for 50 minutes, then heating to 40-50 ℃ from 800+/-30 ℃ for 35-45 minutes, and discharging to obtain the ceramic filter particles capable of being regenerated by microwaves.
2. The microwave regenerable ceramic filter particles as recited in claim 1, wherein: the fineness of the aluminum oxide powder is 150-200 meshes; the fineness of the high-purity silicon dioxide powder is 600-800 meshes; the fineness of the coal active carbon powder is 150-200 meshes; the fineness of the zeolite powder is 400-600 meshes; the fineness of the technical grade kaolin powder is 4000 meshes.
3. The microwave-regenerable ceramic filter particles of claim 1 or 2, wherein: the material density of the ceramic filter particles capable of being regenerated by microwaves is 400-450kg/m 2, and the bulk density is 300-350 kg/m.
4. The microwave-regenerable ceramic filter particles of claim 1 or 2, wherein: the adsorption iodine value of the ceramic filter particles capable of being regenerated by microwaves is 600-700mg/g.
5. The microwave-regenerable ceramic filter particles of claim 1 or 2, wherein: the compressive strength of the ceramic filter particles capable of being regenerated by microwaves is more than 4.5MPa.
6. The microwave regenerable ceramic filter particles as recited in claim 1, wherein: in the step 3), the temperature of microwave irradiation is 40-50 ℃.
7. A method for regenerating a microwave-regenerable ceramic filter particle as recited in any one of claims 1 to 6, wherein: and pyrolyzing the ceramic filter particles capable of being regenerated by microwaves for 6-8 hours under the microwave irradiation condition of 800-900 ℃.
CN202011513612.2A 2020-12-21 2020-12-21 Ceramic filter particle capable of being regenerated by microwaves, preparation method thereof and regeneration method thereof Active CN112774626B (en)

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