CN113582550A - Glass-based porous material and preparation method thereof - Google Patents
Glass-based porous material and preparation method thereof Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
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- C03C11/00—Multi-cellular glass ; Porous or hollow glass or glass particles
- C03C11/007—Foam glass, e.g. obtained by incorporating a blowing agent and heating
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- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/06—Other methods of shaping glass by sintering, e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction
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Abstract
The invention discloses a glass-based porous material, which belongs to the technical field of porous materials and comprises the following raw materials in parts by weight: 65-75 parts of waste circuit board nonmetal powder, 5-7 parts of coal powder, 18-25 parts of water glass, 1.5-2.6 parts of sodium fluosilicate and 0.4-0.5 part of water reducing agent. The invention also discloses a preparation method thereof; the invention fully utilizes the excellent characteristics of respective performances of organic components and inorganic components in the nonmetal powder of the waste circuit board, and the prepared glass-based porous material has the characteristics of high apparent porosity, good permeability, high compression strength, good alkali corrosion resistance and the like, low calcination temperature (775-825 ℃), low energy consumption and the like, and can be used for treating medium-low temperature dust-containing flue gas, alkaline and neutral sewage; in the glass-based porous material, the utilization rate of the waste circuit board grinding nonmetal powder is up to 65-75%, and the glass-based porous material has good economic benefit and environmental protection benefit.
Description
Technical Field
The invention belongs to the technical field of porous materials, and particularly relates to a glass-based porous material and a preparation method thereof.
Background
The porous material is a material with a net structure formed by closed or interconnected pores, generally, a fireproof high-strength material is used as an aggregate, a pore-forming agent is matched to generate pores under high-temperature calcination, and the porous material product is widely applied to the fields of chemical industry, environmental protection, energy, metallurgy, petroleum, building, medicine, biochemistry and the like according to different preparation raw materials, pore-forming modes and product performance indexes.
The waste printed circuit board is subjected to effective recycling of precious metals through the processing processes of crushing → levigating → gravity separation and the like, so that non-metal fine powder (hereinafter referred to as waste circuit board non-metal powder) accounting for 50-80% of the mass of the waste printed circuit board is generated, wherein the waste circuit board non-metal powder mainly comprises glass fibers, epoxy resins, phenolic resins and the like, the glass fibers account for about 70%, and the epoxy resins and the phenolic resins account for about 30%. As is well known, glass fiber, epoxy resin, phenolic resin and the like in the nonmetal powder of the waste circuit board are not easy to degrade, differentiate and recycle, and if the disposal mode of landfill and stockpiling is adopted, the local ecological environment is seriously damaged, so the comprehensive utilization of the glass fiber, the epoxy resin, the phenolic resin and the like is required for sustainable development, and the waste is changed into the valuable.
The invention CN110903528A discloses a method for preparing composite material by using waste circuit board, the invention CN110305380A discloses a rubber compound based on waste printed circuit board non-metal powder and a preparation method thereof, the invention CN109553800A discloses a method for separating glass fiber and epoxy resin in waste circuit board non-metal powder, the invention CN111018428A discloses a production process for preparing road baking-free bricks by using waste circuit boards, the invention 201310044154.6 discloses a method for preparing composite material by using waste printed circuit board non-metal powder and ABS resin, the invention CN107867687A discloses a method for preparing active carbon by using waste circuit boards, the invention CN107879347B discloses a method for preparing silica gel by using non-metal separator in waste circuit boards, although the invention effectively recovers and utilizes waste circuit board non-metal powder, most of the utilization is restricted by process conditions, production cost and environmental protection requirements, the application of the method is limited to a certain extent, and the patents cannot combine the utilization of the respective performance advantages of the glass fiber and the resin in the waste circuit board non-metal powder, so that the development of a new product with high added value by using the waste circuit board non-metal powder is necessary.
Disclosure of Invention
The purpose of the invention is as follows: in order to solve the problems in the prior art, the invention provides a glass-based porous material; the invention also aims to provide a preparation method thereof, and the prepared glass-based porous material has the characteristics of high apparent porosity, good permeability, high compression strength, good alkali corrosion resistance and the like, also has the characteristics of low calcination temperature (775-825 ℃), low energy consumption and the like, and can be used for treating medium-low temperature dust-containing flue gas, alkaline or neutral sewage.
The technical scheme is as follows: in order to achieve the purpose, the invention adopts the following technical scheme:
a glass-based porous material is composed of the following raw materials in parts by weight: 65-75 parts of waste circuit board nonmetal powder, 5-7 parts of coal powder, 18-25 parts of water glass, 1.5-2.6 parts of sodium fluosilicate and 0.4-0.5 part of water reducing agent.
Furthermore, the fineness of the nonmetal powder of the waste circuit board is 0.080mm, the screen residue of a square-hole screen is less than or equal to 1.0 percent, and the ignition loss during ignition at 500 ℃ is more than or equal to 25 percent.
Furthermore, the pulverized coal is anthracite, the screen residue of a square-hole screen with the fineness of 0.080mm is less than or equal to 1.0 percent, and the ash content is less than or equal to 15.0 percent.
Further, the water glass is sodium type water glass, Na2O≥10％，SiO2Not less than 25 percent and the density of 1.35 to 1.45g/cm3And the modulus is 2.5-2.9.
Furthermore, the content of the sodium fluosilicate is more than or equal to 98 percent, the water content is less than or equal to 1 percent, and the screen residue of a square-hole screen with the fineness of 0.080mm is less than or equal to 10.0 percent.
Further, the water reducing agent is a polycarboxylic acid high-performance water reducing agent (retarding type) with the model of PCA-I.
Further, the density of the glass-based porous material is 1.05-1.15 g/cm3The apparent porosity is 50.2 to 55.3%, and the permeation flux is 1.05 to 1.30mL-2.min-1The compression strength is 12.2-14.3 MPa, and the alkali corrosion mass loss rate is 1.43-1.96%.
The preparation method of the glass-based porous material comprises the following steps:
1) weighing waste circuit board nonmetal powder, coal powder and sodium fluosilicate according to a formula, uniformly mixing in a mixer in advance to obtain a dry material mixture, weighing water glass and a water reducing agent according to the formula, and uniformly stirring in a glass container in advance;
2) pouring the dry material mixture prepared in the step 1) into a cement mortar stirrer (or an instrument with similar performance), starting the stirrer, pouring the water glass and the water reducing agent which are stirred uniformly in advance, and quickly stirring for 4-5 min to obtain a wet material mixture;
3) pressing the wet material mixture prepared in the step 2) into a blank, wherein the forming pressure is 4-5 MPa, and the pressure maintaining time is 20-30 s;
4) putting the blank pressed and molded in the step 3) into an environment with the temperature of 20-30 ℃ and the humidity of less than or equal to 80% for air drying for 2-3 d;
5) drying the blank dried and dried in the step 4) in a drying oven at 105 +/-5 ℃ for 2-3 h;
6) putting the dried blank in the step 5) into a high-temperature furnace, and performing heating and cooling procedures to obtain a glass-based porous material;
further, in step 6), the temperature raising and lowering procedure is as follows: heating the mixture from room temperature to 300 ℃ at the speed of 5-6 ℃/min, and keeping the temperature for 50-60 min; raising the temperature to 775-825 ℃ at the heating rate of 3-4 ℃/min, and preserving the temperature for 30-40 min; standing, and naturally cooling to room temperature to obtain the glass-based porous material.
The invention principle is as follows: the invention utilizes sodium fluosilicate as a solidification and hardening accelerator of water glass to make the nonmetal powder and coal powder of the waste circuit board mutually bonded and solidified to form a blank; epoxy resin organic matters, phenolic resin organic matters and the like in the nonmetal powder of the waste circuit board and holes generated by gas escaped after the added coal powder is burnt at high temperature are used as pore-forming agents of the glass-based porous material; glass fiber which is melted at high temperature in the nonmetal powder of the waste circuit board is used as a strength framework of the glass-based porous material; meanwhile, the heat energy (namely, an internal heat source) generated by the high-temperature combustion of organic matters such as epoxy resin, phenolic resin and the like in the nonmetal powder of the waste circuit board and the coal powder is used as the supplement of the external heat source during the calcination of the glass-based porous material.
Has the advantages that: compared with the prior art, the glass-based porous material prepared by the invention utilizes sodium fluosilicate as a solidification and hardening accelerator of water glass, so that a porous material blank has the characteristics of high solidification forming speed, no deformation, low drying shrinkage, high strength and the like; by utilizing the heat energy generated by burning organic matters (epoxy resins, phenolic resins and the like) and coal powder in the nonmetal powder of the waste circuit board, the prepared glass-based porous material has the characteristic of low calcining energy consumption; by utilizing the characteristic of inorganic matters (glass fibers) in the nonmetal powder of the waste circuit board, the prepared glass-based porous material has the characteristic of low calcining temperature; in a word, the prepared glass-based porous material has the characteristics of high apparent porosity, wide pore size distribution range, good permeability, high compression strength, good alkali corrosion resistance, low calcination temperature (775-825 ℃) and the like, and can be used for treating medium-low temperature dust-containing flue gas, alkaline or neutral sewage; in the glass-based porous material prepared by the invention, the utilization rate of the waste circuit board grinding nonmetal powder is up to 65-75%, the production cost is reduced, natural resources are saved, and the glass-based porous material has good economic benefit and environmental protection benefit.
Drawings
FIG. 1 is an SEM image of a glass-based porous material prepared in example 1;
FIG. 2 is an SEM image of a glass-based porous material prepared in example 3;
fig. 3 is an SEM image of the glass-based porous material prepared in example 5.
Detailed Description
The invention is further described with reference to the following figures and specific examples.
The glass-based porous material consists of the following raw materials in parts by weight: 65-75 parts of waste circuit board nonmetal powder, 5-7 parts of coal powder, 18-25 parts of water glass, 1.5-2.6 parts of sodium fluosilicate and 0.4-0.5 part of water reducing agent.
Non-metal powder of the waste circuit board: the screen residue of a square-hole screen with the fineness of 0.080mm is less than or equal to 1.0 percent, and the ignition loss during ignition at 500 ℃ is more than or equal to 25 percent.
The coal powder is anthracite: the screen residue of a square-hole screen with the fineness of 0.080mm is less than or equal to 1.0 percent, and the ash content is less than or equal to 15.0 percent.
The water glass is sodium type water glass: na (Na)2O≥10％，SiO2Not less than 25 percent and the density of 1.35 to 1.45g/cm3The modulus is 2.5 to 2.9.
Sodium fluosilicate: the content is more than or equal to 98 percent, the water content is less than or equal to 1 percent, and the residue of a square-hole sieve with the fineness of 0.080mm is less than or equal to 10 percent.
The water reducing agent is a polycarboxylic acid high-performance water reducing agent (retarding type): the model is PCA-I.
The density of the glass-based porous material is 1.05-1.15 g/cm3The apparent porosity is 50.2 to 55.3%, and the permeation flux is 1.05 to 1.30mL-2.min-1The compression strength is 12.2-14.3 MPa, and the alkali corrosion mass loss rate is 1.43-1.96%.
The preparation method of the glass-based porous material comprises the following steps:
1) weighing the waste circuit board nonmetal powder, the coal powder and the sodium fluosilicate according to the formula, uniformly mixing in a mixer in advance to obtain a dry material mixture, weighing the water glass and the water reducing agent according to the formula, and uniformly stirring in a glass container in advance.
2) Pouring the dry material mixture prepared in the step 1) into a cement mortar stirrer (or an instrument with similar performance), starting the stirrer, pouring the water glass and the water reducing agent which are stirred uniformly in advance, and quickly stirring for 4-5 min to obtain a wet material mixture.
3) Pressing the wet material mixture prepared in the step 2) into a blank, wherein the forming pressure is 4-5 MPa, and the pressure maintaining time is 20-30 s;
4) putting the blank pressed and molded in the step 3) into an environment with the temperature of 20-30 ℃ and the humidity of less than or equal to 80% for air drying for 2-3 d;
5) drying the blank dried and dried in the step 4) in a drying oven at 105 +/-5 ℃ for 2-3 h;
6) putting the dried blank in the step 5) into a high-temperature furnace, and performing heating and cooling procedures to obtain a glass-based porous material;
in step 6), the temperature raising and lowering procedure is as follows: heating the mixture from room temperature to 300 ℃ at the speed of 5-6 ℃/min, and keeping the temperature for 50-60 min; raising the temperature to 775-825 ℃ at the heating rate of 3-4 ℃/min, and preserving the temperature for 30-40 min; standing, and naturally cooling to room temperature to obtain the glass-based porous material.
Example 1
Proportioning: 65 parts of waste circuit board nonmetal powder, 7 parts of coal powder, 25 parts of water glass, 2.6 parts of sodium fluosilicate and 0.4 part of water reducing agent.
1) Weighing waste circuit board nonmetal powder, coal powder and sodium fluosilicate according to a formula, uniformly mixing in a mixer in advance to obtain a dry material mixture, weighing water glass and a water reducing agent according to the formula, and uniformly stirring in a glass container in advance;
2) pouring the dry material mixture prepared in the step 1) into a cement mortar stirrer (or an instrument with similar performance), starting the stirrer, pouring the water glass and the water reducing agent which are stirred uniformly in advance, and quickly stirring for 4-5 min to obtain a wet material mixture.
3) Pressing the wet material mixture prepared in the step 2) into a blank, wherein the forming pressure is 4-5 MPa, and the pressure maintaining time is 20-30 s;
4) putting the blank pressed and molded in the step 3) into an environment with the temperature of 20-30 ℃ and the humidity of less than or equal to 80% for air drying for 2-3 d;
5) drying the blank dried and dried in the step 4) in a drying oven at 105 +/-5 ℃ for 2-3 h;
6) putting the dried blank in the step 5) into a high-temperature furnace, and performing heating and cooling procedures to obtain a glass-based porous material;
in step 6), the temperature raising and lowering procedure is as follows: heating the mixture from room temperature to 300 ℃ at the speed of 5-6 ℃/min, and keeping the temperature for 50-60 min; raising the temperature to 775-825 ℃ at the heating rate of 3-4 ℃/min, and preserving the temperature for 30-40 min; standing, and naturally cooling to room temperature to obtain the glass-based porous material
Example 2
Proportioning: 67.5 parts of waste circuit board nonmetal powder, 6.5 parts of coal powder, 23.3 parts of water glass, 2.3 parts of sodium fluosilicate and 0.4 part of water reducing agent.
The preparation method comprises the following steps:
1) weighing waste circuit board nonmetal powder, coal powder and sodium fluosilicate according to a formula, uniformly mixing in a mixer in advance to obtain a dry material mixture, weighing water glass and a water reducing agent according to the formula, and uniformly stirring in a glass container in advance;
2) pouring the dry material mixture prepared in the step 1) into a cement mortar stirrer (or an instrument with similar performance), starting the stirrer, pouring the water glass and the water reducing agent which are stirred uniformly in advance, and quickly stirring for 4-5 min to obtain a wet material mixture.
3) Pressing the wet material mixture prepared in the step 2) into a blank, wherein the forming pressure is 4-5 MPa, and the pressure maintaining time is 20-30 s;
4) putting the blank pressed and molded in the step 3) into an environment with the temperature of 20-30 ℃ and the humidity of less than or equal to 80% for air drying for 2-3 d;
5) drying the blank dried and dried in the step 4) in a drying oven at 105 +/-5 ℃ for 2-3 h;
6) putting the dried blank in the step 5) into a high-temperature furnace, and performing heating and cooling procedures to obtain a glass-based porous material;
in step 6), the temperature raising and lowering procedure is as follows: heating the mixture from room temperature to 300 ℃ at the speed of 5-6 ℃/min, and keeping the temperature for 50-60 min; raising the temperature to 775-825 ℃ at the heating rate of 3-4 ℃/min, and preserving the temperature for 30-40 min; standing, and naturally cooling to room temperature to obtain the glass-based porous material
Example 3
Proportioning: 70 parts of waste circuit board nonmetal powder, 6 parts of coal powder, 21.5 parts of water glass, 2.0 parts of sodium fluosilicate and 0.5 part of water reducing agent.
The preparation method comprises the following steps:
1) weighing waste circuit board nonmetal powder, coal powder and sodium fluosilicate according to a formula, uniformly mixing in a mixer in advance to obtain a dry material mixture, weighing water glass and a water reducing agent according to the formula, and uniformly stirring in a glass container in advance;
2) pouring the dry material mixture prepared in the step 1) into a cement mortar stirrer (or an instrument with similar performance), starting the stirrer, pouring the water glass and the water reducing agent which are stirred uniformly in advance, and quickly stirring for 4-5 min to obtain a wet material mixture.
3) Pressing the wet material mixture prepared in the step 2) into a blank, wherein the forming pressure is 4-5 MPa, and the pressure maintaining time is 20-30 s;
4) putting the blank pressed and molded in the step 3) into an environment with the temperature of 20-30 ℃ and the humidity of less than or equal to 80% for air drying for 2-3 d;
5) drying the blank dried and dried in the step 4) in a drying oven at 105 +/-5 ℃ for 2-3 h;
6) putting the dried blank in the step 5) into a high-temperature furnace, and performing heating and cooling procedures to obtain a glass-based porous material;
in step 6), the temperature raising and lowering procedure is as follows: heating the mixture from room temperature to 300 ℃ at the speed of 5-6 ℃/min, and keeping the temperature for 50-60 min; raising the temperature to 775-825 ℃ at the heating rate of 3-4 ℃/min, and preserving the temperature for 30-40 min; standing, and naturally cooling to room temperature to obtain the glass-based porous material
Example 4
Proportioning: 72.5 parts of waste circuit board nonmetal powder, 5.5 parts of coal powder, 19.7 parts of water glass, 1.8 parts of sodium fluosilicate and 0.5 part of water reducing agent.
The preparation method comprises the following steps:
1) weighing waste circuit board nonmetal powder, coal powder and sodium fluosilicate according to a formula, uniformly mixing in a mixer in advance to obtain a dry material mixture, weighing water glass and a water reducing agent according to the formula, and uniformly stirring in a glass container in advance;
2) pouring the dry material mixture prepared in the step 1) into a cement mortar stirrer (or an instrument with similar performance), starting the stirrer, pouring the water glass and the water reducing agent which are stirred uniformly in advance, and quickly stirring for 4-5 min to obtain a wet material mixture;
3) pressing the wet material mixture prepared in the step 2) into a blank, wherein the forming pressure is 4-5 MPa, and the pressure maintaining time is 20-30 s;
4) putting the blank pressed and molded in the step 3) into an environment with the temperature of 20-30 ℃ and the humidity of less than or equal to 80% for air drying for 2-3 d;
5) drying the blank dried and dried in the step 4) in a drying oven at 105 +/-5 ℃ for 2-3 h;
6) putting the dried blank in the step 5) into a high-temperature furnace, and performing heating and cooling procedures to obtain a glass-based porous material;
in step 6), the temperature raising and lowering procedure is as follows: heating the mixture from room temperature to 300 ℃ at the speed of 5-6 ℃/min, and keeping the temperature for 50-60 min; raising the temperature to 775-825 ℃ at the heating rate of 3-4 ℃/min, and preserving the temperature for 30-40 min; standing, and naturally cooling to room temperature to obtain the glass-based porous material
Example 5
Proportioning: 75 parts of waste circuit board nonmetal powder, 5 parts of coal powder, 18 parts of water glass, 1.5 parts of sodium fluosilicate and 0.5 part of water reducing agent.
The preparation method comprises the following steps:
1) weighing waste circuit board nonmetal powder, coal powder and sodium fluosilicate according to a formula, uniformly mixing in a mixer in advance to obtain a dry material mixture, weighing water glass and a water reducing agent according to the formula, and uniformly stirring in a glass container in advance;
2) pouring the dry material mixture prepared in the step 1) into a cement mortar stirrer (or an instrument with similar performance), starting the stirrer, pouring the water glass and the water reducing agent which are stirred uniformly in advance, and quickly stirring for 4-5 min to obtain a wet material mixture;
3) pressing the wet material mixture prepared in the step 2) into a blank, wherein the forming pressure is 4-5 MPa, and the pressure maintaining time is 20-30 s;
4) putting the blank pressed and molded in the step 3) into an environment with the temperature of 20-30 ℃ and the humidity of less than or equal to 80% for air drying for 2-3 d;
5) drying the blank dried and dried in the step 4) in a drying oven at 105 +/-5 ℃ for 2-3 h;
6) putting the dried blank in the step 5) into a high-temperature furnace, and performing heating and cooling procedures to obtain a glass-based porous material;
in step 6), the temperature raising and lowering procedure is as follows: heating the mixture from room temperature to 300 ℃ at the speed of 5-6 ℃/min, and keeping the temperature for 50-60 min; raising the temperature to 775-825 ℃ at the heating rate of 3-4 ℃/min, and preserving the temperature for 30-40 min; standing, and naturally cooling to room temperature to obtain the glass-based porous material.
EXAMPLES investigation of Properties of glass-based porous Material obtained by the preparation method of the present invention
The volume weight, apparent porosity, compression strength, permeation flux, alkali corrosion resistance and other properties of the glass-based porous material are detected according to the conventional technology in the general technical standard field of porous ceramic products, and are shown in table 1; the fracture microscopic morphology of the glass-based porous materials of the embodiments 1, 3 and 5 was observed by a scanning electron microscope, and is shown in the attached figures 1 to 3.
From the results of the measurement of the properties of the glass-based porous materials prepared in examples 1 to 5 in table 1, it can be seen that: the bulk density is 1.05-1.15 g (cm)3)-1To (c) to (d); the apparent porosity is between 50.2% and 55.3%, which is far higher than the technical standard requirement that the porous ceramic product is more than or equal to 30%; the compressive strength is between 12.2MPa and 14.3MPa, the average value reaches 13.1MPa, and the average value is far higher than the technical standard requirement that the average compressive strength of the porous ceramic product is more than 8.0 MPa; the alkali corrosion resistant quality loss rate is between 1.43 and 1.96 percent, and the technical standard requirement that the alkali corrosion resistant quality loss rate of the porous ceramic product is less than or equal to 5.0 percent is met; the permeability is good, and the permeation flux reaches 1.05-1.30 mL-2.min-1。
TABLE 1 glass-based porous Material Properties
As can be seen from fig. 1 to 3: the porous structure of the glass-based porous material has the following characteristics: firstly, although the shape of the holes is not regular, the holes are communicated with each other; the size of the hole is reduced along with the increase of the doping amount of the nonmetal powder of the waste circuit board; and thirdly, the size distribution range of the pores is wide, most of the pores have the size of several to dozens of micrometers, but the maximum size is less than 50 micrometers.
In conclusion, the glass-based porous material has the characteristics of high apparent porosity, high compression strength, wide pore size distribution range, good permeability, good alkali corrosion resistance and the like, has the characteristics of low calcination temperature (775-825 ℃), low energy consumption and the like, and can be used for treating medium and low temperature dust-containing flue gas, alkaline or neutral sewage; in the glass-based porous material, the doping proportion of the waste circuit board grinding non-metal powder is up to 65-75%, so that the production cost is reduced, natural resources are saved, and good economic benefit and environmental protection benefit are achieved.
Claims (9)
1. The glass-based porous material is characterized by comprising the following raw materials in parts by weight: 65-75 parts of waste circuit board nonmetal powder, 5-7 parts of coal powder, 18-25 parts of water glass, 1.5-2.6 parts of sodium fluosilicate and 0.4-0.5 part of water reducing agent.
2. A glass-based porous material as defined in claim 1, wherein: the fineness of the nonmetal powder of the waste circuit board is 0.080mm, the screen residue of a square-hole sieve is less than or equal to 1.0 percent, and the ignition loss during ignition at 500 ℃ is more than or equal to 25 percent.
3. A glass-based porous material as defined in claim 1, wherein: the pulverized coal is anthracite, the screen residue of a square-hole screen with the fineness of 0.080mm is less than or equal to 1.0 percent, and the ash content is less than or equal to 15.0 percent.
4. A glass-based porous material as defined in claim 1, wherein: the water glass is sodium type water glass, Na2O≥10％，SiO2Not less than 25 percent and the density of 1.35 to 1.45g/cm3The modulus is 2.5 to 2.9.
5. A glass-based porous material as defined in claim 1, wherein: the content of the sodium fluosilicate is more than or equal to 98 percent, the water content is less than or equal to 1 percent, and the screen residue of a square-hole screen with the fineness of 0.080mm is less than or equal to 10 percent.
6. A glass-based porous material as defined in claim 1, wherein: the water reducing agent is a polycarboxylic acid high-performance water reducing agent, and the model is PCA-I.
7. A glass-based porous material as defined in claim 1, wherein: the density of the glass-based porous material is 1.05-1.15 g/cm3The apparent porosity is 50.2 to 55.3%, and the permeation flux is 1.05 to 1.30mL-2.min-1The compression strength is 12.2-14.3 MPa, and the alkali corrosion mass loss rate is 1.43-1.96%.
8. A method for producing a glass-based porous material according to any one of claims 1 to 7, characterized in that: the method comprises the following steps:
1) weighing waste circuit board nonmetal powder, coal powder and sodium fluosilicate according to a formula, uniformly mixing in a mixer in advance to obtain a dry material mixture, weighing water glass and a water reducing agent according to the formula, and uniformly stirring in a glass container in advance;
2) pouring the dry material mixture prepared in the step 1) into a stirrer, starting the stirrer, pouring the water glass and the water reducing agent which are stirred uniformly in advance, and stirring again to obtain a wet material mixture;
3) pressing the wet material mixture prepared in the step 2) into a blank;
4) air-drying the green body formed by pressing in the step 3);
5) placing the blank dried and dried in the step 4) in a drying oven for drying;
6) and (3) putting the dried blank in the step 5) into a high-temperature furnace, and carrying out heating and cooling procedures to obtain the glass-based porous material.
9. The method for preparing a glass-based porous material according to claim 8, wherein: in step 6), the temperature raising and lowering procedure is as follows: heating the mixture from room temperature to 300 ℃ at the speed of 5-6 ℃/min, and keeping the temperature for 50-60 min; raising the temperature to 775-825 ℃ at the heating rate of 3-4 ℃/min, and preserving the temperature for 30-40 min; standing, and naturally cooling to room temperature to obtain the glass-based porous material.
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| CN202110928679.0A CN113582550A (en) | 2021-08-13 | 2021-08-13 | Glass-based porous material and preparation method thereof |
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| CN202110928679.0A CN113582550A (en) | 2021-08-13 | 2021-08-13 | Glass-based porous material and preparation method thereof |
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2021
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Application publication date: 20211102 |