CN110668797A - Filtering ceramic carrier and preparation method thereof - Google Patents
Filtering ceramic carrier and preparation method thereof Download PDFInfo
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- CN110668797A CN110668797A CN201911066723.0A CN201911066723A CN110668797A CN 110668797 A CN110668797 A CN 110668797A CN 201911066723 A CN201911066723 A CN 201911066723A CN 110668797 A CN110668797 A CN 110668797A
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
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- 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
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
- C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/02—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding chemical blowing agents
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- C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3427—Silicates other than clay, e.g. water glass
- C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
- C04B2235/3472—Alkali metal alumino-silicates other than clay, e.g. spodumene, alkali feldspars such as albite or orthoclase, micas such as muscovite, zeolites such as natrolite
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- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/349—Clays, e.g. bentonites, smectites such as montmorillonite, vermiculites or kaolines, e.g. illite, talc or sepiolite
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- C04B2235/50—Constituents or additives of the starting mixture chosen for their shape or used because of their shape or their physical appearance
- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
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- C04B2235/54—Particle size related information
- C04B2235/5418—Particle size related information expressed by the size of the particles or aggregates thereof
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- C04B2235/656—Aspects relating to heat treatments of ceramic bodies such as green ceramics or pre-sintered ceramics, e.g. burning, sintering or melting processes characterised by specific heating conditions during heat treatment
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Abstract
The invention discloses a filtering ceramic carrier and a preparation method thereof, wherein the filtering ceramic carrier comprises the following raw materials in parts by weight: 15-25 parts of ceramic mud, 70-85 parts of aluminum oxide and 2-5 parts of lithium-containing additive. In the invention, the alpha-Al is improved by controlling the roasting temperature to 1250-1400 DEG C2O3The content is beneficial to improving the modulus of rupture of the ceramic tile and increasing the rigidity of the filtering ceramic carrier; by controlling the proportion of various raw materials, the cordierite phase content in the filter ceramic carrier is favorably improved, the porosity is improved, and three-dimensional communication is formedGood filtration performance is obtained. The content of calcined alumina is increased, which is beneficial to forming a small amount of corundum phase in the porous filtering ceramic tile.
Description
Technical Field
The invention relates to the technical field of ceramic manufacturing, in particular to a filtering ceramic carrier and a preparation method thereof.
Background
The structure of the purification device comprises a carrier (namely porous ceramic) and a catalyst loaded on the carrier, wherein the more pores of the carrier are, the more uniform the pores are, the larger the effective adsorption surface area of the carrier is, and the stronger the purification capacity is. The pore-forming agent of the current carrier is generally an organic pore-forming agent, such as natural fibers, high molecular polymers, organic acids and the like, the organic pore-forming agent decomposes at a temperature far lower than the sintering temperature of the carrier, pores are left after decomposition, and the pores, especially small pores, are easy to close during subsequent high-temperature sintering molding, so that the porosity of the carrier is low, and the catalytic capability is poor.
Therefore, there is a need to provide a new filter ceramic carrier to solve the above technical problems.
Disclosure of Invention
The invention mainly aims to provide a filter ceramic carrier and a preparation method thereof, and aims to solve the technical problem that the existing lepidolite roasting impregnation slag cannot be effectively utilized.
In order to achieve the purpose, the filter ceramic carrier provided by the invention comprises the following components in parts by weight:
15-25 parts of ceramic mud, 70-85 parts of aluminum oxide and 2-5 parts of lithium-containing additive.
Preferably, the ceramic mud comprises the following components in parts by weight:
65-75 parts by mass of silicon oxide, 8-12 parts by mass of aluminum oxide, 0.05-0.30 part by mass of ferric oxide, 7.5-10.5 parts by mass of calcium oxide, 1.5-3 parts by mass of sodium oxide and 1-2 parts by mass of phosphorus pentoxide.
Preferably, the lithium-containing additive is spodumene.
The invention also provides a preparation method of the filter ceramic carrier, which comprises the following steps:
step one, mixing 15-25 parts by mass of ceramic mud, 70-85 parts by mass of aluminum oxide and 2-5 parts by mass of lithium-containing additive, and grinding into a powdery raw material;
step two, roasting and adsorbing the powdery raw material produced in the step one to prepare the filtering ceramic carrier of any one of claims 1 to 3.
Preferably, the first step includes:
15-25 parts by mass of ceramic mud, 70-85 parts by mass of aluminum oxide and 2-5 parts by mass of lithium-containing additive are mixed and ground into a powdery raw material with the particle size of 50-200 meshes.
Preferably, the second step includes:
and (2) roasting the powdery raw material produced in the step one at 1250-1400 ℃, putting the powdery raw material into ultrapure water for cooling, adding anion adsorption resin for adsorption for 25min, then washing the powdery raw material with the ultrapure water until the washing liquid is neutral, and drying the washing liquid to obtain the filtering ceramic carrier.
Preferably, the lithium-containing additive is spodumene.
The filter ceramic carrier provided by the invention improves alpha-Al content by controlling the roasting temperature to 1250-1400 DEG C2O3The content is beneficial to improving the modulus of rupture of the ceramic mud and increasing the rigidity of the filtering ceramic carrier; by controlling the proportion of various raw materials, the cordierite phase content in the filter ceramic carrier is favorably improved, the porosity is improved, three-dimensional communicated air holes are formed, and good filtering performance is obtained. The content of calcined alumina is increased, which is beneficial to forming a small amount of corundum phase in the porous filtering ceramic tile.
Drawings
Fig. 1 is a schematic flow chart of a method for manufacturing a filter ceramic carrier according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
Unless otherwise specifically stated, various raw materials, reagents, instruments, equipment and the like used in the present invention are commercially available or can be prepared by existing methods.
The invention provides a filtering ceramic carrier which comprises the following raw materials in parts by weight:
15-25 parts of ceramic mud, 70-85 parts of aluminum oxide and 2-5 parts of lithium-containing additive.
Specifically, the ceramic mud is composed of kaolin, potassium feldspar, albite, quartz, calcium hydroxy phosphate, talc and the like, and comprises the following components: 65-75 parts by mass of silicon oxide and 8-12 parts by mass of aluminum oxide; 0.05-0.30 parts by mass of ferric oxide, 7.5-10.5 parts by mass of calcium oxide, 1.5-3 parts by mass of sodium oxide and 1-2 parts by mass of phosphorus pentoxide. The lithium-containing additive is spodumene.
The invention also provides a preparation method of the filter ceramic carrier, which comprises the following steps:
step S1, mixing 15-25 parts by mass of ceramic mud, 70-85 parts by mass of aluminum oxide and 2-5 parts by mass of lithium-containing additive, and grinding into powdery raw materials;
specifically, 15-25 parts by mass of ceramic mud, 70-85 parts by mass of aluminum oxide and 2-5 parts by mass of lithium-containing additive are mixed and ground into a powdery raw material with a particle size of 50-200 meshes. The lithium-containing additive is spodumene. Lithium carbonate can provide lithium oxide, and the lithium oxide has strong fluxing capacity and plays a role in fluxing and cooling ceramic; while the lithium carbonate generates carbon dioxide to promote the generation of pores.
In this embodiment, the alumina is a nano-scale alumina, so that the bending strength and fracture toughness of the filter ceramic carrier can be significantly improved, and the grain size can be reduced.
And S2, roasting the powdery raw material produced in the step S1, and performing adsorption treatment to prepare the filtering ceramic carrier.
Specifically, the powdery raw material produced in the step S1 is calcined at 1250 ℃ to 1400 ℃, put into ultrapure water for cooling, added with anion adsorption resin for adsorption for 25min, washed with ultrapure water until the washing liquid is neutral, and dried to prepare the filtering ceramic carrier.
In the invention, the alpha-Al is improved by controlling the roasting temperature to 1250-1400 DEG C2O3The content is beneficial to improving the modulus of rupture of the ceramic mud and increasing the rigidity of the filtering ceramic carrier; by controlling the proportion of various raw materials, the cordierite phase content in the filter ceramic carrier is favorably improved, the porosity is improved, three-dimensional communicated air holes are formed, and good filtering performance is obtained. The content of calcined alumina is increased, which is beneficial to forming a small amount of corundum phase in the porous filtering ceramic tile.
The filtering ceramic carrier provided by the present invention is specifically described by the following specific examples, wherein the ceramic mud is composed of kaolin, potassium feldspar, albite, quartz, calcium hydroxy phosphate, talc, etc., wherein:
example 1
Mixing 20g of ceramic mud, 77g of aluminum oxide and 3g of spodumene, and grinding into a powdery raw material with the particle size of 100 meshes;
roasting the powdery raw material at 1300 ℃, cooling the powdery raw material in ultrapure water, adding anion adsorption resin for adsorption for 25min, cleaning the powdery raw material with the ultrapure water until the cleaning solution is neutral, and drying the powdery raw material to prepare the filtering ceramic carrier.
Example 2
Mixing 15g of ceramic mud, 70g of aluminum oxide and 2g of spodumene, and grinding into a powdery raw material with the particle size of 50 meshes;
roasting the powdery raw material at 1250 ℃, cooling the powdery raw material in ultrapure water, adding anion adsorption resin for adsorption for 25min, cleaning the ultrapure water until the cleaning solution is neutral, and drying the ultrapure water to prepare the filtering ceramic carrier.
Example 3
Mixing 25g of ceramic mud, 85g of aluminum oxide and 5g of spodumene, and grinding into a powdery raw material with the particle size of 200 meshes;
and (2) roasting the powdery raw material at 1400 ℃, cooling the powdery raw material in ultrapure water, adding anion adsorption resin for adsorption for 25min, then cleaning the powdery raw material with the ultrapure water until the cleaning solution is neutral, and drying the powdery raw material to prepare the filtering ceramic carrier.
Example 4
Mixing 17g of ceramic mud, 80g of aluminum oxide and 5g of spodumene, and grinding into a powdery raw material with the particle size of 150 meshes;
roasting the powdery raw material at 1300 ℃, cooling the powdery raw material in ultrapure water, adding anion adsorption resin for adsorption for 25min, cleaning the powdery raw material with the ultrapure water until the cleaning solution is neutral, and drying the powdery raw material to prepare the filtering ceramic carrier.
Example 5
Mixing 20g of ceramic mud, 80g of aluminum oxide and 4g of spodumene, and grinding into a powdery raw material with the particle size of 200 meshes;
roasting the powdery raw material at 1300 ℃, cooling the powdery raw material in ultrapure water, adding anion adsorption resin for adsorption for 25min, cleaning the powdery raw material with the ultrapure water until the cleaning solution is neutral, and drying the powdery raw material to prepare the filtering ceramic carrier.
The filtered ceramic supports prepared in examples 1 to 5 were tested using JC/T686-1998, with the following test data:
the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the present specification and directly/indirectly applied to other related technical fields within the spirit of the present invention are included in the scope of the present invention.
Claims (7)
1. The filtering ceramic carrier is characterized by comprising the following raw materials in parts by mass:
15-25 parts of ceramic mud, 70-85 parts of aluminum oxide and 2-5 parts of lithium-containing additive.
2. The filtering ceramic carrier according to claim 1, wherein the ceramic mud comprises the following components in parts by mass:
65-75 parts by mass of silicon oxide, 8-12 parts by mass of aluminum oxide, 0.05-0.30 part by mass of ferric oxide, 7.5-10.5 parts by mass of calcium oxide, 1.5-3 parts by mass of sodium oxide and 1-2 parts by mass of phosphorus pentoxide.
3. The filtering ceramic support of claim 1, wherein the lithium-containing additive is spodumene.
4. The preparation method of the filtering ceramic carrier is characterized by comprising the following steps:
step one, mixing 15-25 parts by mass of ceramic mud, 70-85 parts by mass of aluminum oxide and 2-5 parts by mass of lithium-containing additive, and grinding into a powdery raw material;
step two, roasting and adsorbing the powdery raw material produced in the step one to prepare the filtering ceramic carrier of any one of claims 1 to 3.
5. The method of claim 4, wherein the first step comprises:
15-25 parts by mass of ceramic mud, 70-85 parts by mass of aluminum oxide and 2-5 parts by mass of lithium-containing additive are mixed and ground into a powdery raw material with the particle size of 50-200 meshes.
6. The method for preparing a filtering ceramic carrier according to claim 4, wherein the second step comprises:
and (2) roasting the powdery raw material produced in the step one at 1250-1400 ℃, putting the powdery raw material into ultrapure water for cooling, adding anion adsorption resin for adsorption for 25min, then washing the powdery raw material with the ultrapure water until the washing liquid is neutral, and drying the washing liquid to obtain the filtering ceramic carrier.
7. The method of claim 4, wherein the lithium-containing additive is spodumene.
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Application publication date: 20200110 |