CN113772699A - Preparation method of boehmite and cleaning and grinding device - Google Patents
Preparation method of boehmite and cleaning and grinding device Download PDFInfo
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- CN113772699A CN113772699A CN202111138018.4A CN202111138018A CN113772699A CN 113772699 A CN113772699 A CN 113772699A CN 202111138018 A CN202111138018 A CN 202111138018A CN 113772699 A CN113772699 A CN 113772699A
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- boehmite
- matrix
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- cleaning
- rod
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- 229910001593 boehmite Inorganic materials 0.000 title claims abstract description 184
- FAHBNUUHRFUEAI-UHFFFAOYSA-M hydroxidooxidoaluminium Chemical compound O[Al]=O FAHBNUUHRFUEAI-UHFFFAOYSA-M 0.000 title claims abstract description 184
- 238000000227 grinding Methods 0.000 title claims abstract description 102
- 238000004140 cleaning Methods 0.000 title claims abstract description 88
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000011159 matrix material Substances 0.000 claims abstract description 69
- 239000000843 powder Substances 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 11
- 238000004321 preservation Methods 0.000 claims abstract description 9
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000005507 spraying Methods 0.000 claims abstract description 5
- 239000000243 solution Substances 0.000 claims description 47
- 230000005540 biological transmission Effects 0.000 claims description 36
- 229910052751 metal Inorganic materials 0.000 claims description 14
- 239000002184 metal Substances 0.000 claims description 14
- 230000007246 mechanism Effects 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 11
- 239000008367 deionised water Substances 0.000 claims description 10
- 229910021641 deionized water Inorganic materials 0.000 claims description 10
- 238000002156 mixing Methods 0.000 claims description 8
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 7
- 239000008139 complexing agent Substances 0.000 claims description 7
- 239000012266 salt solution Substances 0.000 claims description 7
- 239000002904 solvent Substances 0.000 claims description 7
- 238000005406 washing Methods 0.000 claims description 7
- CSNNHWWHGAXBCP-UHFFFAOYSA-L Magnesium sulfate Chemical compound [Mg+2].[O-][S+2]([O-])([O-])[O-] CSNNHWWHGAXBCP-UHFFFAOYSA-L 0.000 claims description 6
- 229910002651 NO3 Inorganic materials 0.000 claims description 6
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims description 6
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 claims description 6
- ZCCIPPOKBCJFDN-UHFFFAOYSA-N calcium nitrate Chemical compound [Ca+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O ZCCIPPOKBCJFDN-UHFFFAOYSA-N 0.000 claims description 6
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 claims description 6
- HSJPMRKMPBAUAU-UHFFFAOYSA-N cerium(3+);trinitrate Chemical compound [Ce+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O HSJPMRKMPBAUAU-UHFFFAOYSA-N 0.000 claims description 6
- -1 rare earth chloride Chemical class 0.000 claims description 6
- 229910052761 rare earth metal Inorganic materials 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 230000033001 locomotion Effects 0.000 claims description 5
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 4
- 230000018044 dehydration Effects 0.000 claims description 4
- 238000006297 dehydration reaction Methods 0.000 claims description 4
- 238000009777 vacuum freeze-drying Methods 0.000 claims description 4
- 230000006978 adaptation Effects 0.000 claims description 3
- 239000011790 ferrous sulphate Substances 0.000 claims description 3
- 235000003891 ferrous sulphate Nutrition 0.000 claims description 3
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 claims description 3
- ICAKDTKJOYSXGC-UHFFFAOYSA-K lanthanum(iii) chloride Chemical compound Cl[La](Cl)Cl ICAKDTKJOYSXGC-UHFFFAOYSA-K 0.000 claims description 3
- 229910052943 magnesium sulfate Inorganic materials 0.000 claims description 3
- 235000019341 magnesium sulphate Nutrition 0.000 claims description 3
- ATINCSYRHURBSP-UHFFFAOYSA-K neodymium(iii) chloride Chemical compound Cl[Nd](Cl)Cl ATINCSYRHURBSP-UHFFFAOYSA-K 0.000 claims description 3
- 239000001509 sodium citrate Substances 0.000 claims description 3
- NLJMYIDDQXHKNR-UHFFFAOYSA-K sodium citrate Chemical group O.O.[Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O NLJMYIDDQXHKNR-UHFFFAOYSA-K 0.000 claims description 3
- 239000003381 stabilizer Substances 0.000 claims description 3
- 238000001035 drying Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 9
- 238000001179 sorption measurement Methods 0.000 description 8
- 238000004519 manufacturing process Methods 0.000 description 7
- 239000007788 liquid Substances 0.000 description 5
- 229910021645 metal ion Inorganic materials 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 2
- 239000003463 adsorbent Substances 0.000 description 2
- 150000001450 anions Chemical class 0.000 description 2
- 235000011132 calcium sulphate Nutrition 0.000 description 2
- 238000001027 hydrothermal synthesis Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000003980 solgel method Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 239000012876 carrier material Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 229910010293 ceramic material Inorganic materials 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/02—Aluminium oxide; Aluminium hydroxide; Aluminates
- C01F7/021—After-treatment of oxides or hydroxides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/02—Crushing or disintegrating by disc mills with coaxial discs
- B02C7/08—Crushing or disintegrating by disc mills with coaxial discs with vertical axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
- B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
- B02C7/00—Crushing or disintegrating by disc mills
- B02C7/11—Details
- B02C7/14—Adjusting, applying pressure to, or controlling distance between, discs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/045—Cleaning involving contact with liquid using perforated containers, e.g. baskets, or racks immersed and agitated in a liquid bath
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/04—Cleaning involving contact with liquid
- B08B3/08—Cleaning involving contact with liquid the liquid having chemical or dissolving effect
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
The invention discloses a boehmite preparation method and a cleaning and grinding device, which comprises the following steps: s1, preparing a boehmite matrix; s2, cleaning the boehmite matrix; s3, drying the boehmite matrix; s4, pre-crushing the block boehmite matrix to obtain granular boehmite; s5, grinding the granular boehmite matrix to obtain boehmite powder; s6, maintaining the pressure of boehmite powder to obtain a boehmite intermediate; and S7, uniformly spraying the alumina solution on the outer side of the boehmite intermediate by using a ball roller to obtain boehmite with the particle size of 50-200 nm. In the invention, boehmite powder is subjected to heat preservation for 2h under the pressure of 4.2-4.8MPa, namely the pressure of 253.48-261 ℃ steam, the flow state of the powder is kept in the heat preservation process to obtain a boehmite intermediate with the particle size of 10 +/-5 microns, and the reaction process is controlled by controlling the flow rate of high-temperature steam and gas to prepare the boehmite intermediate.
Description
Technical Field
The invention relates to the technical field of boehmite preparation, in particular to a boehmite preparation method and a cleaning and grinding device.
Background
Boehmite is a hydrated alumina compound, and the unique chemical, optical and mechanical properties of boehmite are widely applied to the fields of ceramic materials, composite materials, surface protective layer materials, optical materials, catalysts, carrier materials, semiconductor materials, coatings and the like.
The main production methods of boehmite comprise a sol-gel method and a hydrothermal synthesis method, the boehmite prepared by the sol-gel method is relatively seriously agglomerated and has high production cost, and the boehmite prepared by the hydrothermal synthesis process is greatly influenced by raw materials and water temperature, so that the method improves the existing production method and adds steam pressure maintaining, the cost of the boehmite generated by the method is low, the production process is easy to control, and the prepared boehmite has the characteristics of uniform granularity and pure crystal phase.
Disclosure of Invention
In order to solve the technical problems mentioned in the background art, a boehmite preparation method and a cleaning and grinding device are provided.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for preparing boehmite, comprising the steps of:
s1, preparing boehmite matrix: mixing the volume ratio of aluminum hydroxide solution: metal salt solution: metal complexing agent: solvent 1: 6-8: mixing at a ratio of 1-2:28-35, adding into a reaction kettle, and carrying out thermal reaction for 24 hours to obtain a boehmite matrix, wherein the reaction temperature is 220 ℃;
s2, cleaning the boehmite matrix: adding the boehmite matrix into a cleaning device, and injecting deionized water or absolute ethyl alcohol to clean the boehmite matrix;
s3, dry boehmite matrix: putting the cleaned boehmite matrix into a vacuum freeze-drying instrument for dehydration for 24h to obtain a blocky boehmite matrix;
s4, pre-crushing a block boehmite matrix to obtain granular boehmite: adding the dried massive boehmite matrix into a crusher for crushing to obtain a granular boehmite matrix;
s5, grinding the granular boehmite matrix to obtain boehmite powder: adding the granular boehmite matrix into a grinding device, and grinding to obtain boehmite powder;
s6, pressure maintaining of boehmite powder to obtain a boehmite intermediate: keeping the boehmite powder at 4.2-4.8MPa, namely 253.48-261 ℃ steam pressure for 2h, and keeping the flow state of the powder in the heat preservation process to obtain a boehmite intermediate with the particle size of 10 +/-5 mu m;
and S7, uniformly spraying the alumina solution on the outer side of the boehmite intermediate by using a ball roller to obtain boehmite with the particle size of 50-200 nm.
As a further description of the above technical solution:
the metal salt solution is one of nitrate, sulfate or rare earth chloride solution, the nitrate solution is one of calcium nitrate or cerium nitrate solution, the sulfate solution is one of calcium sulfate, ferrous sulfate or magnesium sulfate solution, and the rare earth chloride solution is one of lanthanum chloride or neodymium chloride solution.
As a further description of the above technical solution:
the metal complexing agent is sodium citrate, and the solvent is deionized water.
As a further description of the above technical solution:
the utility model provides a belt cleaning device of boehmite, includes the support, be connected with the washing case through a plurality of stabilizer blade subassemblies on the support, fixed mounting has a plurality of vibrating motor who is connected with the washing case on the support, rotate on the support and install the transmission shaft, sliding connection has the lifter of motion in vertical direction on the transmission shaft, the free end of lifter can be dismantled and be connected with and be located the washing tank of wasing the incasement, transmission shaft bottom fixed mounting has the worm wheel, fixed mounting has a driving motor on the support, a driving motor's output shaft transmission is connected with the worm of being connected with the worm wheel meshing.
As a further description of the above technical solution:
the utility model discloses a bearing device, including transmission shaft, lifter, bracing piece, first electric telescopic handle, transmission shaft both sides fixedly connected with guide block, the guide way that has guide block looks adaptation on the lifter, the bracing piece has been cup jointed on the transmission shaft, fixed mounting has first electric telescopic handle on the bracing piece, first electric telescopic handle's free end and lifter fixed connection.
As a further description of the above technical solution:
the stabilizer blade subassembly includes fixed connection and washs bottom of the case portion movable rod all around, the sleeve in the movable rod outside is established to a plurality of covers of fixedly connected with on the support, the bottom fixedly connected with spring of movable rod, the free end and the support fixed connection of spring.
As a further description of the above technical solution:
lifting lugs are fixedly connected to the periphery of the top of the cleaning tank, and a plurality of hanging strings connected with the lifting lugs in an articulated mode are arranged at the bottom of the free end of the lifting rod.
As a further description of the above technical solution:
the utility model provides a grinder of boehmite, includes the frame, frame bottom both sides fixed mounting has second electric telescopic handle, second electric telescopic handle's free end fixedly connected with lifter plate, rotate on the lifter plate and install the grinding groove, frame top fixed mounting has third driving motor, the abrasive disc of fixedly connected with and grinding groove looks adaptation on third driving motor's the output shaft, spiral feeding mechanism is installed to frame top both sides.
As a further description of the above technical solution:
the spiral feeding mechanism comprises a feeding box fixedly mounted at the top of the frame, one side of the top of the feeding box is communicated with a feeding pipe, the other side of the bottom of the feeding box is communicated with a discharging pipe matched with the grinding groove, a spiral rod is rotatably mounted inside the feeding box, and a second driving motor connected with the spiral rod in a transmission mode is fixedly mounted on the outer side of the feeding box.
As a further description of the above technical solution:
the improved grinding machine is characterized in that a turntable is rotatably mounted at the top of the lifting plate, a fourth driving motor connected with the turntable in a transmission mode is fixedly mounted at the bottom of the lifting plate, a cross groove is formed in the top of the turntable, and a cross rod connected with the bottom of the grinding groove in a clamping mode is fixedly connected with the bottom of the cross groove.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
1. in the invention, boehmite powder is subjected to heat preservation for 2h under the pressure of 4.2-4.8MPa, namely the pressure of 253.48-261 ℃ steam, the flow state of the powder is kept in the heat preservation process to obtain a boehmite intermediate with the particle size of 10 +/-5 microns, and the reaction process is controlled by controlling the flow rate of high-temperature steam and gas to prepare the boehmite intermediate.
2. In the invention, compared with the traditional boehmite, metal ions are doped into the boehmite raw material before the boehmite is prepared, the metal ions have better specific surface area, generate more adsorption interfaces, are less influenced by other anions, and have good adsorption effect when being used as an adsorbent, for example, the lanthanum-doped boehmite has the effect of quickly exerting 80-90% of adsorption performance within 30min, and is beneficial to the adsorption application of the flowing fluoride ion waste liquid.
3. In the invention, a cleaning device is connected with a crusher through a conveyor belt, a boehmite matrix is placed in a cleaning tank, deionized water or absolute ethyl alcohol is injected into the cleaning tank and does not go through the cleaning tank, under the vibration action of a vibration motor, liquid in the cleaning tank continuously shakes and impacts the boehmite matrix in the cleaning tank, thereby cleaning boehmite, after cleaning is finished, firstly, a lifting rod is driven by a first electric telescopic rod to drive the cleaning tank to move upwards and separate from the cleaning tank, then, a worm is driven by a first driving motor to rotate, a worm wheel is driven to drive a transmission shaft to rotate according to the meshing transmission principle of a latch, the cleaning tank is moved to a transmission belt, a hanger is loosened from a lifting lug, thereby the cleaned boehmite matrix is sent to the next preparation process for processing, labor is saved, the degree of mechanical automation is improved, wherein, when the vibration motor drives the cleaning box to vibrate, because the effect of the spring, a vibration allowance exists between the cleaning box and the support, on one hand, the normal operation of the vibration work of the cleaning box is guaranteed, on the other hand, the vibration absorption effect is achieved, and the problem that the support is damaged due to the fact that the vibration amplitude of the support is too large when the cleaning box vibrates is avoided.
4. According to the invention, the block boehmite matrixes are orderly fed into the grinding grooves through the spiral feeding mechanism, the top of the grinding disc 22 is of a conical surface structure, the block boehmite matrixes can fall into the grinding grooves along the surface of the block boehmite matrixes, the lifting plate is driven by the second electric telescopic rod to drive the grinding grooves to move upwards, so that the grinding discs move relatively and enter the grinding grooves, a proper grinding interval is kept between the grinding grooves and the grinding discs, then the grinding discs are driven to rotate by the third driving motor, meanwhile, the rotary disc and the grinding grooves are driven to rotate anticlockwise relative to the grinding discs by the fourth driving motor, and in the rotating process, the block boehmite matrixes are dynamically fed into the bottom of the grinding grooves, so that the block boehmite matrixes are ground into powder, the structure is simple, the operation is convenient, wherein the block boehmite matrixes are fed into the feeding box through the feeding pipe, and the spiral rod is driven to rotate by the second driving motor, pass through the discharging pipe ejection of compact to grinding inslot with cubic boehmite base member, simultaneously, the adjustment grinds the grinding interval between groove and the abrasive disc, realizes the limit and grinds the limit pay-off, improves work efficiency, and after the grinding, drive second electric telescopic handle drives the groove downstream of grinding, breaks away from the abrasive disc, takes out the grinding groove can.
Drawings
Fig. 1 is a schematic view illustrating a process for preparing boehmite and a process flow of a cleaning and grinding apparatus according to an embodiment of the present invention;
fig. 2 is a schematic perspective view illustrating a method for preparing boehmite and a cleaning apparatus of a cleaning and grinding apparatus according to an embodiment of the present invention;
fig. 3 is a schematic structural view illustrating a method for preparing boehmite and a cleaning bath of a cleaning and polishing apparatus according to an embodiment of the present invention;
fig. 4 is a schematic structural view illustrating a leg assembly of a cleaning and grinding apparatus and a method for preparing boehmite according to an embodiment of the present invention;
fig. 5 is a schematic view showing an operating state of a boehmite preparation method and a grinding apparatus of a cleaning and grinding apparatus according to an embodiment of the present invention;
fig. 6 is a schematic view illustrating a non-operating state of a boehmite preparation method and a grinding apparatus of a cleaning and grinding apparatus according to an embodiment of the present invention;
fig. 7 is a schematic structural view illustrating a method for preparing boehmite and a turntable of a cleaning and grinding apparatus according to an embodiment of the present invention;
fig. 8 is a schematic bottom view of a grinding groove of a cleaning and grinding apparatus and a method for preparing boehmite according to an embodiment of the present invention;
fig. 9 is a schematic structural view illustrating a screw feeding mechanism of a cleaning and grinding apparatus and a method for preparing boehmite according to an embodiment of the present invention.
Illustration of the drawings:
1. a support; 2. a drive shaft; 201. a guide block; 3. a lifting rod; 301. a guide groove; 4. a support bar; 5. a worm gear; 6. a worm; 7. a first drive motor; 8. a vibration motor; 9. a leg assembly; 91. a movable rod; 92. a sleeve; 93. a spring; 10. a first electric telescopic rod; 11. a dropper; 12. a cleaning tank; 13. a cleaning tank; 14. lifting lugs; 15. a frame; 16. a screw feeding mechanism; 161. a feeding box; 162. a screw rod; 163. a discharge pipe; 164. a feed pipe; 165. a second drive motor; 17. a grinding groove; 171. a cross bar; 18. a lifting plate; 19. a second electric telescopic rod; 20. a third drive motor; 21. a fourth drive motor; 22. a grinding disk; 23. a turntable; 231. a cross-shaped groove.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the 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.
Example one
Referring to fig. 1-9, the present invention provides a technical solution: a method for preparing boehmite, comprising the steps of:
s1, preparing boehmite matrix: mixing the volume ratio of aluminum hydroxide solution: metal salt solution: metal complexing agent: solvent 1: 6-8: mixing at a ratio of 1-2:28-35, adding into a reaction kettle, and carrying out thermal reaction for 24 hours to obtain a boehmite matrix, wherein the reaction temperature is 220 ℃;
specifically, the metal salt solution is one of nitrate, sulfate or rare earth chloride solution, the nitrate solution is one of calcium nitrate or cerium nitrate solution, the sulfate solution is one of calcium sulfate, ferrous sulfate or magnesium sulfate solution, the rare earth chloride solution is one of lanthanum chloride or neodymium chloride solution, the metal complexing agent is sodium citrate, and the solvent is deionized water;
compared with the traditional boehmite, the metal ions are doped into the boehmite raw material before the boehmite is prepared, the metal ions have better specific surface area, generate more adsorption interfaces, are less influenced by other anions, and have good adsorption effect when being used as an adsorbent, for example, the lanthanum-doped boehmite has the effect of quickly playing 80-90% of adsorption performance within 30min, and is beneficial to the adsorption application of the flowing fluoride ion waste liquid;
s2, cleaning the boehmite matrix: adding the boehmite matrix into a cleaning device, and injecting deionized water or absolute ethyl alcohol to clean the boehmite matrix;
s3, dry boehmite matrix: putting the cleaned boehmite matrix into a vacuum freeze-drying instrument for dehydration for 24h to obtain a blocky boehmite matrix;
s4, pre-crushing a block boehmite matrix to obtain granular boehmite: adding the dried massive boehmite matrix into a crusher for crushing to obtain a granular boehmite matrix;
s5, grinding the granular boehmite matrix to obtain boehmite powder: adding the granular boehmite matrix into a grinding device, and grinding to obtain boehmite powder;
s6, pressure maintaining of boehmite powder to obtain a boehmite intermediate: the boehmite powder is subjected to heat preservation for 2 hours under the pressure of 4.2-4.8MPa, namely the pressure of 253.48-261 ℃ steam, the flow state of the powder is kept in the heat preservation process, a boehmite intermediate with the particle size of 10 +/-5 mu m is obtained, the reaction process is controlled by controlling the flow rate of high-temperature steam and gas to prepare the boehmite intermediate, the process is simple, the environment is protected, the production cost is low, the production process is easy to control, and the product quality is superior.
And S7, uniformly spraying the alumina solution on the outer side of the boehmite intermediate by using a ball roller to obtain boehmite with the particle size of 50-200nm, wherein the hardness of the alumina is about 8, the hardness of the boehmite is less than 4, and the hardness of the boehmite is improved.
Referring to fig. 2-4, a boehmite cleaning device comprises a bracket 1, wherein the bracket 1 is connected with a cleaning tank 12 through a plurality of support leg assemblies 9, the bracket 1 is fixedly provided with a plurality of vibration motors 8 connected with the cleaning tank 12, the bracket 1 is rotatably provided with a transmission shaft 2, the transmission shaft 2 is slidably connected with a lifting rod 3 moving in the vertical direction, the free end of the lifting rod 3 is detachably connected with a cleaning tank 13 positioned in the cleaning tank 12, the bottom of the transmission shaft 2 is fixedly provided with a worm wheel 5, the bracket 1 is fixedly provided with a first driving motor 7, and an output shaft of the first driving motor 7 is in transmission connection with a worm 6 meshed with the worm wheel 5;
the cleaning device is connected with the crusher through a conveyor belt, the boehmite matrix is put into a cleaning tank 13, deionized water or absolute ethyl alcohol is injected into a cleaning box 12 to submerge the cleaning tank 13, under the vibration action of the vibration motor 8, the liquid in the cleaning tank 12 continuously shakes and impacts the boehmite matrix in the cleaning tank 13, thereby cleaning the boehmite, after the cleaning is finished, firstly, the lifting rod 3 is driven to drive the cleaning tank 13 to move upwards and separate from the cleaning box 12, then, the worm 6 is driven to rotate by the first driving motor 7, the worm wheel 5 is driven to drive the transmission shaft 2 to rotate according to the meshing transmission principle of the latch, the cleaning tank 13 is moved to the transmission belt, the connection between the lifting rod 3 and the cleaning tank 13 is released, therefore, the boehmite matrix after being cleaned is sent to the next preparation process for processing, the labor is saved, and the degree of mechanical automation is improved.
Referring to fig. 2 and 3, two sides of the transmission shaft 2 are fixedly connected with guide blocks 201, the lifting rod 3 is provided with a guide groove 301 matched with the guide blocks 201, the transmission shaft 2 is sleeved with a support rod 4, the support rod 4 is fixedly provided with a first electric telescopic rod 10, and a free end of the first electric telescopic rod 10 is fixedly connected with the lifting rod 3;
Referring to fig. 1 and 4, the leg assembly 9 includes a movable rod 91 fixedly connected to the periphery of the bottom of the cleaning tank 12, a plurality of sleeves 92 sleeved outside the movable rod 91 are fixedly connected to the bracket 1, a spring 93 is fixedly connected to the bottom of the movable rod 91, and a free end of the spring 93 is fixedly connected to the bracket 1;
when the vibration motor 8 drives the cleaning box 12 to vibrate, because the effect of the spring 93, a vibration allowance exists between the cleaning box 12 and the support 1, on one hand, the normal operation of the vibration work of the cleaning box 12 is guaranteed, on the other hand, the vibration absorption effect is achieved, and the problem that the support 1 is damaged due to the fact that the resonance amplitude of the support 1 is too large when the cleaning box 12 vibrates is avoided.
Referring to fig. 3, a lifting lug 14 is fixedly connected to the periphery of the top of the cleaning tank 13, and a plurality of hanging strings 11 hooked with the lifting lug 14 are provided at the bottom of the free end of the lifting rod 3, so as to facilitate the taking and placing of the cleaning tank 13.
Referring to fig. 5-9, a boehmite grinding device comprises a frame 15, wherein second electric telescopic rods 19 are fixedly arranged on two sides of the bottom of the frame 15, a lifting plate 18 is fixedly connected to the free ends of the second electric telescopic rods 19, grinding grooves 17 are rotatably arranged on the lifting plate 18, a third driving motor 20 is fixedly arranged on the top of the frame 15, a grinding disc 22 matched with the grinding grooves 17 is fixedly connected to an output shaft of the third driving motor 20, and spiral feeding mechanisms 16 are arranged on two sides of the top of the frame 15;
blocky boehmite base member passes through in the orderly grinding groove 17 that feeds into of spiral feeding mechanism 16, abrasive disc 22 top is the conical surface structure, guarantee that blocky boehmite base member can fall into the abrasive groove 17 along its surface in, drive abrasive groove 17 upward movement through 19 drive lifter plates 18 of second electric telescopic handle, make abrasive disc 22 relative motion get into in the abrasive groove 17, keep a suitable grinding interval between abrasive groove 17 and the abrasive disc 22, then, rotate through third driving motor 20 drive abrasive disc 22, and simultaneously, drive abrasive groove 17 is relative abrasive disc 22 anticlockwise rotation, thereby grind blocky boehmite base member into powder, moreover, the steam generator is simple in structure, and convenient for operation.
Referring to fig. 5 and 9, the screw feeding mechanism 16 includes a feeding box 161 fixedly mounted on the top of the frame 15, one side of the top of the feeding box 161 is communicated with a feeding pipe 164, the other side of the bottom is communicated with a discharging pipe 163 matched with the grinding groove 17, a screw rod 162 is rotatably mounted inside the feeding box 161, a second driving motor 165 in transmission connection with the screw rod 162 is fixedly mounted outside the feeding box 161, during the grinding process, the block boehmite matrix is fed into the feeding box 161 through the feeding pipe 164, the screw rod 162 is driven to rotate through the second driving motor 165, the block boehmite matrix is discharged into the grinding groove 17 through the discharging pipe 163, and meanwhile, the grinding distance between the grinding groove 17 and the grinding disc 22 is adjusted, so that the feeding while grinding is realized, and the working efficiency is improved.
Referring to fig. 6-8, a turntable 23 is rotatably mounted on the top of the lifting plate 18, a fourth driving motor 21 in transmission connection with the turntable 23 is fixedly mounted at the bottom of the lifting plate 18, the turntable 23 and the grinding groove 17 are driven to rotate by the fourth driving motor 21, and during the rotation process, the block-shaped boehmite base is dynamically sent to the bottom of the grinding groove 17, a cross groove 231 is formed at the top of the turntable 23, a cross rod 171 in clamping connection with the cross groove 231 is fixedly connected to the bottom of the grinding groove 17, so that the grinding groove 17 can be conveniently taken and placed, and the grinding groove 17 is ensured to synchronously rotate along with the fourth driving motor 21 by the connection of the cross groove 231 and the cross rod 171.
The working principle is as follows: when used, S1, preparation of boehmite matrix: mixing the volume ratio of aluminum hydroxide solution: metal salt solution: metal complexing agent: solvent 1: 6-8: mixing at a ratio of 1-2:28-35, adding into a reaction kettle, and carrying out thermal reaction for 24 hours to obtain a boehmite matrix, wherein the reaction temperature is 220 ℃;
s2, cleaning the boehmite matrix: adding the boehmite matrix into a cleaning device, and injecting deionized water or absolute ethyl alcohol to clean the boehmite matrix;
s3, dry boehmite matrix: putting the cleaned boehmite matrix into a vacuum freeze-drying instrument for dehydration for 24h to obtain a blocky boehmite matrix;
s4, pre-crushing a block boehmite matrix to obtain granular boehmite: adding the dried massive boehmite matrix into a crusher for crushing to obtain a granular boehmite matrix;
specifically, the cleaning device is connected with the crusher through a conveyor belt, the boehmite matrix is placed in a cleaning tank 13, deionized water or absolute ethyl alcohol is injected into a cleaning tank 12 and does not go through the cleaning tank 13, under the vibration action of a vibration motor 8, liquid in the cleaning tank 12 continuously shakes and collides with the boehmite matrix in the cleaning tank 13, so that boehmite is cleaned, after cleaning is finished, firstly, a lifting rod 3 is driven by a first electric telescopic rod 10 to drive the cleaning tank 13 to move upwards to be separated from the cleaning tank 12, then, a worm 6 is driven by a first driving motor 7 to rotate, according to the meshing transmission principle of a latch, a worm wheel 5 is driven to drive a transmission shaft 2 to rotate, the cleaning tank 13 is moved to a transmission belt, a hanger 11 is loosened from a lifting lug 14, so that the cleaned boehmite matrix is sent to the next preparation process for processing, manpower is saved, and the mechanical automation degree is improved, when the vibration motor 8 drives the cleaning box 12 to vibrate, a vibration allowance exists between the cleaning box 12 and the support 1 due to the action of the spring 93, so that on one hand, the normal operation of the vibration operation of the cleaning box 12 is ensured, on the other hand, the vibration absorption effect is achieved, and the problem that the support 1 is damaged due to the fact that the resonance amplitude of the support 1 is too large when the cleaning box 12 vibrates is solved;
s5, grinding the granular boehmite matrix to obtain boehmite powder: adding the granular boehmite matrix into a grinding device, and grinding to obtain boehmite powder;
specifically, the massive boehmite basal bodies are orderly fed into the grinding grooves 17 through the spiral feeding mechanism 16, the top of the grinding disc 22 is of a conical surface structure, the massive boehmite basal bodies can fall into the grinding grooves 17 along the surface of the massive boehmite basal bodies, the lifting plate 18 is driven by the second electric telescopic rod 19 to drive the grinding grooves 17 to move upwards, so that the grinding disc 22 moves relatively to enter the grinding grooves 17, a proper grinding distance is kept between the grinding grooves 17 and the grinding disc 22, then the grinding disc 22 is driven to rotate by the third driving motor 20, meanwhile, the turntable 23 and the grinding grooves 17 are driven by the fourth driving motor 21 to rotate counterclockwise relative to the grinding disc 22, and in the rotating process, the massive boehmite basal bodies are dynamically fed into the bottom of the grinding grooves 17, so that the massive boehmite basal bodies are ground into powder, the structure is simple, the operation is convenient, wherein the massive boehmite basal bodies are fed into the feeding box 161 through the feeding pipe 164, the screw rod 162 is driven to rotate by the second driving motor 165, the block-shaped boehmite matrix is discharged into the grinding groove 17 through the discharge pipe 163, meanwhile, the grinding distance between the grinding groove 17 and the grinding disc 22 is adjusted, feeding while grinding is realized, the working efficiency is improved, after grinding is finished, the second electric telescopic rod 19 is driven to drive the grinding groove 17 to move downwards, the grinding groove 17 is separated from the grinding disc 22, and the grinding groove 17 is taken out;
s6, pressure maintaining of boehmite powder to obtain a boehmite intermediate: keeping the boehmite powder at 4.2-4.8MPa, namely 253.48-261 ℃ steam pressure for 2h, and keeping the flow state of the powder in the heat preservation process to obtain a boehmite intermediate with the particle size of 10 +/-5 mu m;
and S7, uniformly spraying the alumina solution on the outer side of the boehmite intermediate by using a ball roller to obtain boehmite with the particle size of 50-200 nm.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (10)
1. A method for preparing boehmite, comprising the steps of:
s1, preparing boehmite matrix: mixing the volume ratio of aluminum hydroxide solution: metal salt solution: metal complexing agent: solvent 1: 6-8: mixing at a ratio of 1-2:28-35, adding into a reaction kettle, and carrying out thermal reaction for 24 hours to obtain a boehmite matrix, wherein the reaction temperature is 220 ℃;
s2, cleaning the boehmite matrix: adding the boehmite matrix into a cleaning device, and injecting deionized water or absolute ethyl alcohol to clean the boehmite matrix;
s3, dry boehmite matrix: putting the cleaned boehmite matrix into a vacuum freeze-drying instrument for dehydration for 24h to obtain a blocky boehmite matrix;
s4, pre-crushing a block boehmite matrix to obtain granular boehmite: adding the dried massive boehmite matrix into a crusher for crushing to obtain a granular boehmite matrix;
s5, grinding the granular boehmite matrix to obtain boehmite powder: adding the granular boehmite matrix into a grinding device, and grinding to obtain boehmite powder;
s6, pressure maintaining of boehmite powder to obtain a boehmite intermediate: keeping the boehmite powder at 4.2-4.8MPa, namely 253.48-261 ℃ steam pressure for 2h, and keeping the flow state of the powder in the heat preservation process to obtain a boehmite intermediate with the particle size of 10 +/-5 mu m;
and S7, uniformly spraying the alumina solution on the outer side of the boehmite intermediate by using a ball roller to obtain boehmite with the particle size of 50-200 nm.
2. The method of claim 1, wherein the metal salt solution is one of a nitrate solution, a sulfate solution, or a rare earth chloride solution, the nitrate solution is one of a calcium nitrate solution or a cerium nitrate solution, the sulfate solution is one of a calcium sulfate solution, a ferrous sulfate solution, or a magnesium sulfate solution, and the rare earth chloride solution is one of a lanthanum chloride solution or a neodymium chloride solution.
3. The method of claim 1, wherein the metal complexing agent is sodium citrate and the solvent is deionized water.
4. The utility model provides a belt cleaning device of boehmite, includes support (1), its characterized in that, be connected with through a plurality of stabilizer blade subassembly (9) on support (1) and wash case (12), fixed mounting has a plurality of vibrating motor (8) of being connected with washing case (12) on support (1), it installs transmission shaft (2) to rotate on support (1), sliding connection has lifter (3) at vertical direction upward movement on transmission shaft (2), the free end of lifter (3) can be dismantled and be connected with washing tank (13) that are located washing case (12), transmission shaft (2) bottom fixed mounting has worm wheel (5), fixed mounting has a driving motor (7) on support (1), the output shaft transmission of a driving motor (7) is connected with worm (6) of being connected with worm wheel (5) meshing.
5. The boehmite cleaning device according to claim 4, characterized in that guide blocks (201) are fixedly connected to both sides of the transmission shaft (2), a guide groove (301) matched with the guide blocks (201) is formed in the lifting rod (3), a support rod (4) is sleeved on the transmission shaft (2), a first electric telescopic rod (10) is fixedly installed on the support rod (4), and the free end of the first electric telescopic rod (10) is fixedly connected with the lifting rod (3).
6. The boehmite cleaning device according to claim 4, characterized in that, the support leg assembly (9) includes a movable rod (91) fixedly connected to the periphery of the bottom of the cleaning tank (12), a plurality of sleeves (92) sleeved outside the movable rod (91) are fixedly connected to the support frame (1), a spring (93) is fixedly connected to the bottom of the movable rod (91), and the free end of the spring (93) is fixedly connected to the support frame (1).
7. The boehmite cleaning device according to claim 4, characterized in that lifting lugs (14) are fixedly connected to the top and the periphery of the cleaning tank (13), and the bottom of the free end of the lifting rod (3) is provided with a plurality of hanging strings (11) which are hooked with the lifting lugs (14).
8. The utility model provides a grinder of boehmite, includes frame (15), its characterized in that, frame (15) bottom both sides fixed mounting has second electric telescopic handle (19), the free end fixedly connected with lifter plate (18) of second electric telescopic handle (19), it installs grinding groove (17) to rotate on lifter plate (18), frame (15) top fixed mounting has third driving motor (20), grinding disk (22) of fixedly connected with and grinding groove (17) looks adaptation on the output shaft of third driving motor (20), spiral feeding mechanism (16) are installed to frame (15) top both sides.
9. The boehmite grinding device according to claim 8, characterized in that the screw feeding mechanism (16) comprises a feeding box (161) fixedly arranged at the top of the frame (15), one side of the top of the feeding box (161) is communicated with a feeding pipe (164), the other side of the bottom of the feeding box is communicated with a discharging pipe (163) matched with the grinding groove (17), a screw rod (162) is rotatably arranged in the feeding box (161), and a second driving motor (165) in transmission connection with the screw rod (162) is fixedly arranged outside the feeding box (161).
10. The boehmite grinding device according to claim 9, characterized in that a turntable (23) is rotatably mounted on the top of the lifting plate (18), a fourth driving motor (21) in transmission connection with the turntable (23) is fixedly mounted on the bottom of the lifting plate (18), a cross groove (231) is formed in the top of the turntable (23), and a cross rod (171) in clamping connection with the cross groove (231) is fixedly connected to the bottom of the grinding groove (17).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111138018.4A CN113772699A (en) | 2021-09-27 | 2021-09-27 | Preparation method of boehmite and cleaning and grinding device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111138018.4A CN113772699A (en) | 2021-09-27 | 2021-09-27 | Preparation method of boehmite and cleaning and grinding device |
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| CN113772699A true CN113772699A (en) | 2021-12-10 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114907749A (en) * | 2022-06-07 | 2022-08-16 | 广州中桥能源科技有限公司 | Material for preventing natural gas gasifier from frosting and freezing and preparation method thereof |
| CN116078481A (en) * | 2022-12-23 | 2023-05-09 | 青岛昊鑫新能源科技有限公司 | Grinding equipment capable of synchronously screening for graphene processing |
| CN116143155A (en) * | 2022-12-30 | 2023-05-23 | 南昌宝弘新材料技术有限公司 | Boehmite with small particle size and high purity and preparation method thereof |
-
2021
- 2021-09-27 CN CN202111138018.4A patent/CN113772699A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114907749A (en) * | 2022-06-07 | 2022-08-16 | 广州中桥能源科技有限公司 | Material for preventing natural gas gasifier from frosting and freezing and preparation method thereof |
| CN116078481A (en) * | 2022-12-23 | 2023-05-09 | 青岛昊鑫新能源科技有限公司 | Grinding equipment capable of synchronously screening for graphene processing |
| CN116078481B (en) * | 2022-12-23 | 2023-12-12 | 青岛昊鑫新能源科技有限公司 | Grinding equipment capable of synchronously screening for graphene processing |
| CN116143155A (en) * | 2022-12-30 | 2023-05-23 | 南昌宝弘新材料技术有限公司 | Boehmite with small particle size and high purity and preparation method thereof |
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Application publication date: 20211210 |
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