CN113019158A - Method for preparing porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding blast furnace slag as main raw material - Google Patents
Method for preparing porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding blast furnace slag as main raw material Download PDFInfo
- Publication number
- CN113019158A CN113019158A CN202110233897.2A CN202110233897A CN113019158A CN 113019158 A CN113019158 A CN 113019158A CN 202110233897 A CN202110233897 A CN 202110233897A CN 113019158 A CN113019158 A CN 113019158A
- Authority
- CN
- China
- Prior art keywords
- raw material
- membrane
- ceramic
- blast furnace
- ceramic membrane
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000000919 ceramic Substances 0.000 title claims abstract description 81
- 239000012528 membrane Substances 0.000 title claims abstract description 76
- 239000002994 raw material Substances 0.000 title claims abstract description 35
- 239000002893 slag Substances 0.000 title claims abstract description 35
- 238000010612 desalination reaction Methods 0.000 title claims abstract description 27
- 239000010456 wollastonite Substances 0.000 title claims abstract description 24
- 229910052882 wollastonite Inorganic materials 0.000 title claims abstract description 24
- 238000004821 distillation Methods 0.000 title claims abstract description 19
- 238000000034 method Methods 0.000 title claims abstract description 19
- 238000003825 pressing Methods 0.000 title claims abstract description 14
- 238000000465 moulding Methods 0.000 title claims abstract description 6
- 229920003229 poly(methyl methacrylate) Polymers 0.000 claims abstract description 28
- 239000004926 polymethyl methacrylate Substances 0.000 claims abstract description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 17
- 230000002209 hydrophobic effect Effects 0.000 claims abstract description 17
- 238000000498 ball milling Methods 0.000 claims abstract description 11
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium oxide Inorganic materials [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims abstract description 11
- 239000000292 calcium oxide Substances 0.000 claims abstract description 11
- 238000001354 calcination Methods 0.000 claims abstract description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000003607 modifier Substances 0.000 claims abstract description 7
- 238000007873 sieving Methods 0.000 claims abstract description 5
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 5
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 claims abstract description 3
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims abstract description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 11
- VLKZOEOYAKHREP-UHFFFAOYSA-N n-Hexane Chemical compound CCCCCC VLKZOEOYAKHREP-UHFFFAOYSA-N 0.000 claims description 7
- 229920001843 polymethylhydrosiloxane Polymers 0.000 claims description 7
- 239000008367 deionised water Substances 0.000 claims description 6
- 229910021641 deionized water Inorganic materials 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 239000012299 nitrogen atmosphere Substances 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 238000004140 cleaning Methods 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 238000001238 wet grinding Methods 0.000 claims description 2
- 230000004907 flux Effects 0.000 abstract description 5
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- -1 hydrogen siloxane Chemical class 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 238000000197 pyrolysis Methods 0.000 abstract 1
- 238000003746 solid phase reaction Methods 0.000 abstract 1
- 239000011148 porous material Substances 0.000 description 15
- 239000000243 solution Substances 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 7
- 239000000843 powder Substances 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 5
- 239000012266 salt solution Substances 0.000 description 5
- 241000282414 Homo sapiens Species 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 150000003839 salts Chemical class 0.000 description 4
- 235000019441 ethanol Nutrition 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000003075 superhydrophobic effect Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 229910052681 coesite Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 229910052906 cristobalite Inorganic materials 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000013535 sea water Substances 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 239000011780 sodium chloride Substances 0.000 description 2
- 239000002910 solid waste Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 229910052682 stishovite Inorganic materials 0.000 description 2
- 229910052905 tridymite Inorganic materials 0.000 description 2
- 238000005303 weighing Methods 0.000 description 2
- 229910004762 CaSiO Inorganic materials 0.000 description 1
- 235000019738 Limestone Nutrition 0.000 description 1
- 229910000805 Pig iron Inorganic materials 0.000 description 1
- 238000002441 X-ray diffraction Methods 0.000 description 1
- 150000001335 aliphatic alkanes Chemical class 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000012267 brine Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 239000013505 freshwater Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 230000004083 survival effect Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D71/00—Semi-permeable membranes for separation processes or apparatus characterised by the material; Manufacturing processes specially adapted therefor
- B01D71/02—Inorganic material
- B01D71/024—Oxides
- B01D71/027—Silicium oxide
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D61/00—Processes of separation using semi-permeable membranes, e.g. dialysis, osmosis or ultrafiltration; Apparatus, accessories or auxiliary operations specially adapted therefor
- B01D61/36—Pervaporation; Membrane distillation; Liquid permeation
- B01D61/364—Membrane distillation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D67/00—Processes specially adapted for manufacturing semi-permeable membranes for separation processes or apparatus
- B01D67/0039—Inorganic membrane manufacture
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
- B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
- B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/08—Specific temperatures applied
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/10—Specific pressure applied
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/12—Specific ratios of components used
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2323/00—Details relating to membrane preparation
- B01D2323/50—Control of the membrane preparation process
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Water Supply & Treatment (AREA)
- Inorganic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
A method for preparing a porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding with blast furnace slag as a main raw material belongs to the technical field of desalination. The preparation method comprises the steps of taking blast furnace slag as a main raw material, taking polymethyl methacrylate as a pore-forming agent, preparing a porous wollastonite ceramic membrane at low cost through dry pressing and solid phase reaction, taking polymethyl hydrogen siloxane as a modifier, and carrying out hydrophobic treatment on the porous wollastonite ceramic membrane by adopting a pyrolysis method, wherein the hydrophobic porous wollastonite ceramic membrane can be used for membrane distillation desalination. Firstly, blast furnace slag, calcium oxide and silicon dioxide are uniformly mixed, a certain amount of polymethyl methacrylate is added, ceramic raw materials are obtained after ball milling, drying and sieving, the ceramic raw materials are pressed into ceramic membrane blanks, then calcination is carried out, wollastonite ceramic membranes with good porous structures are obtained, and the wollastonite porous ceramic membranes subjected to hydrophobic treatment can be used for membrane distillation desalination. The ceramic membrane has higher water flux, and the desalination rate is close to 100 percent.
Description
Technical Field
The invention relates to a method for preparing a porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding with blast furnace slag as a main raw material, belonging to the technical field of desalination.
Background
Water is a basic substance on which human beings rely for survival and life, and is also an irreplaceable natural resource on the earth. With the increasing world population and the development of the human society, the demand of the human beings on fresh water resources is higher and higher. The problem of water resource shortage is becoming increasingly prominent, has become a global social crisis, and is one of the most serious challenges facing human beings. The development of seawater desalination (desalination) technology, and the demand of water to the ocean is a common consensus in all countries in the world. The seawater desalination technology mainly comprises a heat treatment method and a membrane treatment method, wherein the heat treatment method has the advantages of high yield and mature technology, but the energy consumption is high, and the membrane treatment method is widely concerned in recent years. The membrane distillation desalination technology is an organic combination of membrane separation technology and distillation technology, utilizes the characteristic that volatile components (water) are easy to vaporize, and takes the vapor pressure difference of each component on two sides of a membrane as driving force, thereby realizing the membrane separation process of transmembrane mass transfer, and salt is intercepted in brine on the upstream of the membrane. How to prepare efficient and stable membrane materials becomes the key of membrane distillation desalination technology.
A large amount of solid waste is generated during blast furnace iron making, 0.31 ton of blast furnace slag is generated when 1 ton of pig iron is produced, the yield of the blast furnace slag per year in China reaches 3 hundred million tons, and the continuous accumulation of the blast furnace slag not only occupies land resources, but also pollutes the environment. The blast furnace slag is mainly solid waste consisting of ash in fuel, gangue in ore and non-volatile components in solvent (limestone), the chemical composition of the blast furnace slag mainly depends on the chemical composition of iron ore, and the blast furnace slag approximately comprises 27 to 40 percent of SiO 230 to 50 percent of CaO, 5 to 15 percent of Al2O3And 1% -10% of MgO, and wollastonite (CaSiO)3) The main component of (A) is SiO2And CaO, therefore, the blast furnace slag can be used as a main raw material for synthesizing the porous wollastonite ceramic, and the recycling of the blast furnace slag is realized. Therefore, the invention aims to prepare the high-flux and stable-property low-cost blast furnace slag serving as a main raw materialA ceramic membrane.
Disclosure of Invention
The invention aims to provide a method for preparing a porous wollastonite ceramic membrane for membrane distillation desalination by using blast furnace slag as a main raw material. The blast furnace slag is used as a main raw material, so that the raw material cost of the ceramic membrane is greatly reduced, the occupation of the blast furnace slag accumulation on land resources and the pollution to the environment are reduced, and a new idea is provided for the high-added-value comprehensive utilization of the blast furnace slag.
The invention is carried out according to the following steps:
1. a method for preparing a porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding with blast furnace slag as a main raw material comprises the following steps:
(1) mixing the blast furnace slag with calcium oxide and silicon dioxide, and mixing the blast furnace slag: CaO: SiO 2270 wt%: 7.97 wt%: 22.03 wt% of wollastonite raw material is prepared, and a pore-forming agent polymethyl methacrylate is added to obtain a raw material A, wherein the adding amount of the polymethyl methacrylate accounts for 20 wt% -40 wt% of the raw material A;
(2) wet grinding, drying and crushing the raw material A obtained in the step (1), and sieving the raw material A by a 200-mesh standard sieve to obtain a raw material B;
(3) tabletting the raw material B obtained in the step (2) on an electric tablet press to obtain a ceramic membrane blank C;
(4) calcining the ceramic membrane blank C obtained in the step (3) at 1050 ℃ for 5 hours to obtain a ceramic membrane X;
(5) washing the ceramic membrane X obtained in the step (4) with deionized water and ethanol alternately, and drying in a drying oven at 100 ℃ for 24 hours to obtain a ceramic membrane Y;
(6) transferring the ceramic wafer Y obtained in the step (5) into a ceramic boat, adding a hydrophobic modifier solution into the ceramic boat to immerse the ceramic wafer, and reacting the ceramic boat for 2 hours at 600 ℃ in a nitrogen atmosphere to obtain a ceramic wafer Z;
(7) and (4) cleaning the hydrophobic ceramic membrane Z obtained in the step (6) by using deionized water, and drying for later use.
2. In the step (1), the blast furnace slag is obtained from a steel plant and mainly comprises the following components: SiO 22The proportion is 31.8 to 34 percent; CaO accounting for 39-41.6 percent; a. thel2O3The proportion is 12.8% -14.9%; MgO, accounting for 6.2-7.3 percent.
3. In the step (1), the polymethyl methacrylate is abbreviated as PMMA, the particle diameters of the polymethyl methacrylate are 1.8 mu m, 5 mu m and 10 mu m respectively, and the addition amount of the polymethyl methacrylate accounts for 20 wt% -40 wt% of the raw material A.
4. In the step (2), the ball mill is a planetary ball mill, and the ball milling time is 5 hours.
5. In the step (2), the drying temperature is 80 ℃, the drying time is 12 hours, and the sieve is a 200-mesh standard sieve.
6. In the step (3), the pressure of the electric tablet press is 20MPa, and the pressure maintaining time is 1 min.
7. In the step (4), the calcination is carried out in a muffle furnace.
8. In the step (6), the hydrophobic modifier is polymethylhydrosiloxane dissolved in n-hexane to form a solution, wherein the mass fraction of the polymethylhydrosiloxane in the solution is 10%.
Drawings
FIG. 1 XRD spectra of ceramic membranes
FIG. 2 shows the pore size distribution of ceramic membranes prepared with different PMMA particle sizes and contents
FIG. 3 shows water contact angles of ceramic films before and after hydrophobic modification
FIG. 4 water flux and salt rejection of ceramic membranes at different temperatures
Detailed Description
Example 1
42g of blast furnace slag and 13.22g of SiO are respectively weighed2And 4.78g of CaO, and 40g of PMMA powder with the particle size of 10 mu m are weighed and added into the ball milling tanks together, the adding amount of the two symmetrical ball milling tanks is consistent, 150ml of absolute ethyl alcohol is added into each ball milling tank, and the ball milling is carried out for 5 hours. And then transferring the ball-milled slurry into a beaker, putting the beaker into a drying oven to dry for 12 hours at the temperature of 80 ℃, crushing the dried sample, and sieving the sample by a standard sieve of 200 meshes. Weighing 1.2g of sieved powder, putting the powder into a circular grinding tool, keeping the pressure for 1min under 20MPa, tabletting and forming, then putting the pressed ceramic blank into a muffle furnace, calcining at 1050 ℃ for 5h, cooling to room temperature, taking out, alternately washing with deionized water and ethanol, and drying at 100 ℃ for 24 h. Taking 10g of polymethylhydrosiloxyDissolving alkane in 90g of n-hexane to prepare a polymethylhydrosiloxane organic solution with the mass fraction of 10% (when the concentration of a modifier is too low, the surface modification of the ceramic membrane is uneven, and when the concentration of the modifier is too high, the pore blocking phenomenon is easy to occur), transferring the dried ceramic wafer into a ceramic boat, adding the solution to immerse the ceramic wafer, and reacting for 2 hours at 600 ℃ in a nitrogen atmosphere to perform hydrophobic treatment. And then carrying out a desalting experiment on the ceramic membrane subjected to the hydrophobization treatment, wherein the salt solution for the experiment is a sodium chloride solution with the mass fraction of 3.5%. The prepared hydrophobic ceramic membrane has a good pore structure, the average pore diameter is 0.41 mu m, the contact angle to water is 160 degrees, and a good super-hydrophobic effect is achieved. The flux of the salt solution is 20.38Kg/m when the temperature of the salt solution is 80 DEG C2h, the salt rejection rate reaches 99.99 percent.
Example 2
49g of blast furnace slag and 15.42g of SiO are respectively weighed2And 5.58g of CaO, and 30g of PMMA powder with the particle size of 10 mu m are weighed and added into the ball milling tanks together, the adding amount of the two symmetrical ball milling tanks is consistent, 150ml of absolute ethyl alcohol is added into each ball milling tank, and the ball milling is carried out for 5 hours. And then transferring the ball-milled slurry into a beaker, putting the beaker into a drying oven to dry for 12 hours at the temperature of 80 ℃, crushing the dried sample, and sieving the sample by a standard sieve of 200 meshes. Weighing 1.2g of sieved powder, putting the powder into a circular grinding tool, keeping the pressure for 1min under 20MPa, tabletting and forming, then putting the pressed ceramic blank into a muffle furnace, calcining at 1050 ℃ for 5h, cooling to room temperature, taking out, alternately washing with deionized water and ethanol, and drying at 100 ℃ for 24 h. 10g of polymethylhydrosiloxane is dissolved in 90g of normal hexane to prepare a polymethylhydrosiloxane organic solution with the mass fraction of 10%, the dried ceramic wafer is transferred to a ceramic boat, the solution is added to immerse the ceramic wafer, the ceramic wafer is reacted for 2 hours at 600 ℃ in a nitrogen atmosphere to carry out hydrophobic treatment, and then the ceramic wafer after hydrophobic treatment is subjected to desalination experiment, wherein the salt solution for the experiment is a sodium chloride solution with the mass fraction of 3.5%. The prepared hydrophobic ceramic membrane has a good pore structure, the average pore diameter is 0.29 mu m, the contact angle to water is 160 degrees, and a good super-hydrophobic effect is achieved. The flux of the salt solution is 15.6Kg/m at a temperature of 80 DEG C2h, the salt rejection rate reaches 99.99 percent.
FIG. 1 is an XRD spectrum of the ceramic film obtained by calcination, and it can be seen from the XRD spectrum that the phase of the ceramic film after calcination is wollastonite. FIG. 2 is a graph showing the pore size distribution of a ceramic membrane, wherein when PMMA with a particle size of 1.8 μm is used, the average pore size of the ceramic membrane is 0.17 μm when the amount of PMMA is 20 wt%, and the average pore size increases to 0.34 μm when the amount of PMMA is 40%, and it can be seen that the average pore size of the ceramic membrane increases with the increase of the content of PMMA, and the pore sizes of ceramic membranes obtained by using PMMA with other two particle sizes also show the same trend; when the content of PMMA was fixed at 40 wt%, the average pore diameter of the ceramic film obtained using PMMA with a particle size of 1.8 μm was 0.34. mu.m, while the average pore diameter of the ceramic film obtained using PMMA with a particle size of 10 μm was 0.41. mu.m, it was found that the average pore diameter of the ceramic film increased with the increase in the particle size of PMMA, and the pore diameters of the ceramic films obtained with the other two contents of PMMA also tended to change in the same manner. FIG. 3 is a schematic diagram of water contact angles of the ceramic membrane before and after hydrophobic modification, and it can be known that the water contact angle of the ceramic membrane after hydrophobic modification reaches 160 degrees, and the ceramic membrane has a good superhydrophobic effect. FIG. 4 shows the desalination experiment results of ceramic membranes prepared from PMMA with a particle size of 10 μm and a content of 40 wt% at different temperatures, and it can be seen that the water flux increases with the temperature, and the desalination rate is 99.99%.
Claims (8)
1. A method for preparing a porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding with blast furnace slag as a main raw material is characterized by comprising the following steps:
(1) mixing the blast furnace slag with calcium oxide and silicon dioxide, and mixing the blast furnace slag: CaO: SiO 2270 wt%: 7.97 wt%: 22.03 wt% of wollastonite raw material is prepared, and a pore-forming agent polymethyl methacrylate is added to obtain a raw material A, wherein the adding amount of the polymethyl methacrylate accounts for 20 wt% -40 wt% of the raw material A;
(2) wet grinding, drying and crushing the raw material A obtained in the step (1), and sieving the raw material A by a 200-mesh standard sieve to obtain a raw material B;
(3) tabletting the raw material B obtained in the step (2) on an electric tablet press to obtain a ceramic membrane blank C;
(4) calcining the ceramic membrane blank C obtained in the step (3) at 1050 ℃ for 5 hours to obtain a ceramic membrane X;
(5) washing the ceramic membrane X obtained in the step (4) with deionized water and ethanol alternately, and drying in a drying oven at 100 ℃ for 24 hours to obtain a ceramic membrane Y;
(6) transferring the ceramic wafer Y obtained in the step (5) into a ceramic boat, adding a hydrophobic modifier solution into the ceramic boat, and reacting the ceramic boat for 2 hours at 600 ℃ in a nitrogen atmosphere to obtain a ceramic membrane Z;
(7) and (4) cleaning the hydrophobic ceramic membrane Z obtained in the step (6) by using deionized water, and drying for later use.
2. The method for preparing the porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing according to claim 1, wherein the blast furnace slag in the step (1) is obtained from a steel plant and mainly comprises the following components: SiO 22The proportion is 31.8 to 34 percent; CaO accounting for 39-41.6 percent; al (Al)2O3The proportion is 12.8% -14.9%; MgO, accounting for 6.2-7.3 percent.
3. The method for preparing the porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing with blast furnace slag as a main raw material according to claim 1, wherein in the step (1), the polymethyl methacrylate is abbreviated as PMMA, the particle sizes of the polymethyl methacrylate are 1.8 μm, 5 μm and 10 μm respectively, and the addition amount of the polymethyl methacrylate accounts for 20-40 wt% of the raw material A.
4. The method for preparing the porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing with blast furnace slag as a main raw material according to claim 1, wherein in the step (2), the ball mill is a planetary ball mill, and the ball milling time is 5 hours.
5. The method for preparing the porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing with blast furnace slag as a main raw material according to claim 1, wherein in the step (2), the drying temperature is 80 ℃, the drying time is 12 hours, and the sieve is a standard sieve of 200 meshes.
6. The method for preparing the porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing with blast furnace slag as a main raw material according to claim 1, wherein in the step (3), the pressure of the electric tablet press is 20MPa, and the dwell time is 1 min.
7. The method for preparing the porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing with blast furnace slag as a main raw material according to claim 1, wherein in the step (4), the calcination is carried out in a muffle furnace.
8. The method for preparing the porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing with blast furnace slag as a main raw material according to claim 1, wherein in the step (6), the hydrophobic modifier is polymethylhydrosiloxane which is dissolved in n-hexane to form a solution, wherein the polymethylhydrosiloxane accounts for 10% of the mass of the solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110233897.2A CN113019158A (en) | 2021-03-03 | 2021-03-03 | Method for preparing porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding blast furnace slag as main raw material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110233897.2A CN113019158A (en) | 2021-03-03 | 2021-03-03 | Method for preparing porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding blast furnace slag as main raw material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113019158A true CN113019158A (en) | 2021-06-25 |
Family
ID=76465632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110233897.2A Pending CN113019158A (en) | 2021-03-03 | 2021-03-03 | Method for preparing porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding blast furnace slag as main raw material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113019158A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113731187A (en) * | 2021-08-27 | 2021-12-03 | 北京工业大学 | Method for improving desalting stability of porous ceramic membrane by constructing hydrophobic protective layer |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843595A (en) * | 2005-04-07 | 2006-10-11 | 北京航空航天大学 | Preparation of porous membrane by utilizing industrial waste residue |
| CN102688700A (en) * | 2012-06-01 | 2012-09-26 | 清华大学 | Porous ceramic membrane support with flat structure and preparation method thereof |
| US20150274598A1 (en) * | 2012-07-05 | 2015-10-01 | Joseph M. Schwartz | Method of making a hydrogen transport membrane and article |
| KR101720764B1 (en) * | 2015-11-13 | 2017-04-03 | 주식회사 네오이앤에스 | unsintered inorganic membrane for water treatment using slag and fly ash, manufacturing method thereof |
| CN111229060A (en) * | 2020-01-13 | 2020-06-05 | 北京工业大学 | Method for preparing hydrophobic porous wollastonite ceramic membrane for desalination by tape casting by taking high-silicon high-calcium industrial solid waste as raw material |
-
2021
- 2021-03-03 CN CN202110233897.2A patent/CN113019158A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1843595A (en) * | 2005-04-07 | 2006-10-11 | 北京航空航天大学 | Preparation of porous membrane by utilizing industrial waste residue |
| CN102688700A (en) * | 2012-06-01 | 2012-09-26 | 清华大学 | Porous ceramic membrane support with flat structure and preparation method thereof |
| US20150274598A1 (en) * | 2012-07-05 | 2015-10-01 | Joseph M. Schwartz | Method of making a hydrogen transport membrane and article |
| KR101720764B1 (en) * | 2015-11-13 | 2017-04-03 | 주식회사 네오이앤에스 | unsintered inorganic membrane for water treatment using slag and fly ash, manufacturing method thereof |
| CN111229060A (en) * | 2020-01-13 | 2020-06-05 | 北京工业大学 | Method for preparing hydrophobic porous wollastonite ceramic membrane for desalination by tape casting by taking high-silicon high-calcium industrial solid waste as raw material |
Non-Patent Citations (2)
| Title |
|---|
| V BÍLEK JR等: "Potential use of blast furnace slag for filtration membranes preparation: A pilot study", 《IOP CONFERENCE SERIES: MATERIALS SCIENCE AND ENGINEERING》 * |
| 陈俐: "多孔SiC陶瓷膜的制备与废水处理性能的表征", 《功能材料》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113731187A (en) * | 2021-08-27 | 2021-12-03 | 北京工业大学 | Method for improving desalting stability of porous ceramic membrane by constructing hydrophobic protective layer |
| CN113731187B (en) * | 2021-08-27 | 2022-06-14 | 北京工业大学 | Method for improving desalting stability of porous ceramic membrane by constructing hydrophobic protective layer |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111203180B (en) | Magnetic biochar composite adsorbent and preparation method and application thereof | |
| CN111841495A (en) | Preparation method of porous tea residue biochar with high specific surface area | |
| CN109569545B (en) | Method for preparing aluminum-silicon porous material from fly ash | |
| CN111905690A (en) | Method for preparing water body nitrogen and phosphorus removal oxygenation composite material by utilizing coal ash | |
| CN101376094A (en) | Method for preparing modified coal ash phosphorus sorbent and uses thereof | |
| CN104607144A (en) | Structure self-growing aqueous phase phosphate radical adsorbing material and preparation method and application thereof | |
| CN112316924A (en) | Coal gangue-based porous composite material and preparation method and application thereof | |
| CN102091593A (en) | Preparation method of functionalized fly ash and zeolite composite particles | |
| CN110563190A (en) | Method for treating electrolytic manganese slag leachate | |
| CN105727886B (en) | A kind of charcoal ferrotitanium sieve and silica-sesquioxide compound and its preparation method and application | |
| CN110171832A (en) | A method of porous silicon is prepared based on metal hydride reduction | |
| CN113213498A (en) | Cement-based material carbonization recycling method and calcium carbonate whisker material | |
| CN111229060A (en) | Method for preparing hydrophobic porous wollastonite ceramic membrane for desalination by tape casting by taking high-silicon high-calcium industrial solid waste as raw material | |
| CN112624651A (en) | Resource utilization method of electrolytic manganese filter-pressing residues | |
| CN109133934A (en) | The method for preparing silicon carbide-based porous ceramics using oxidation silicon substrate solid waste | |
| CN113019158A (en) | Method for preparing porous wollastonite ceramic membrane for membrane distillation desalination by dry pressing and molding blast furnace slag as main raw material | |
| CN108383540B (en) | Modified fly ash ceramic and preparation method and application thereof | |
| CN109516912B (en) | Method for sealing carbon dioxide | |
| CN114716193B (en) | Preparation method of recycled slag-soil brick | |
| CN103266234A (en) | Method for preparing silicon carbide particle-reinforced aluminum-based composite material from crystalline silica cutting waste material | |
| CN108423683B (en) | Method for producing calcium carbide raw material lime balls by using dry acetylene carbide slag | |
| CN107935018B (en) | Preparation method of two-dimensional transition metal nano-sheet with structure memory | |
| CN113184921B (en) | LDH-based composite material based on nickel-containing sludge and preparation method thereof | |
| CN102351206B (en) | Carbide slag calcium characteristic-based preparation method of phosphorus recovery material | |
| CN115000359A (en) | Method for preparing lithium battery negative electrode material by using graphite tailings |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20210625 |