CN116617983A - Reaction kettle for decomposing monazite rare earth ore by alkaline method - Google Patents
Reaction kettle for decomposing monazite rare earth ore by alkaline method Download PDFInfo
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- CN116617983A CN116617983A CN202310690575.XA CN202310690575A CN116617983A CN 116617983 A CN116617983 A CN 116617983A CN 202310690575 A CN202310690575 A CN 202310690575A CN 116617983 A CN116617983 A CN 116617983A
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- rare earth
- autoclave body
- scraping wall
- decomposing
- reaction kettle
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- 238000006243 chemical reaction Methods 0.000 title claims abstract description 46
- 229910052590 monazite Inorganic materials 0.000 title claims abstract description 37
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 31
- -1 monazite rare earth Chemical class 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 75
- 238000003756 stirring Methods 0.000 claims abstract description 68
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000007790 scraping Methods 0.000 claims description 69
- 239000011229 interlayer Substances 0.000 claims description 25
- 230000008569 process Effects 0.000 claims description 16
- 238000009833 condensation Methods 0.000 claims description 10
- 230000005494 condensation Effects 0.000 claims description 10
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 230000001502 supplementing effect Effects 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 239000002893 slag Substances 0.000 abstract description 30
- 239000003513 alkali Substances 0.000 abstract description 29
- IKNAJTLCCWPIQD-UHFFFAOYSA-K cerium(3+);lanthanum(3+);neodymium(3+);oxygen(2-);phosphate Chemical compound [O-2].[La+3].[Ce+3].[Nd+3].[O-]P([O-])([O-])=O IKNAJTLCCWPIQD-UHFFFAOYSA-K 0.000 abstract description 21
- 238000000926 separation method Methods 0.000 abstract description 13
- 229910052500 inorganic mineral Inorganic materials 0.000 abstract description 9
- 239000011707 mineral Substances 0.000 abstract description 9
- 150000002910 rare earth metals Chemical class 0.000 abstract description 9
- 238000000354 decomposition reaction Methods 0.000 abstract description 5
- 238000011084 recovery Methods 0.000 abstract description 5
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract description 4
- 239000011574 phosphorus Substances 0.000 abstract description 4
- 229910052698 phosphorus Inorganic materials 0.000 abstract description 4
- 238000003723 Smelting Methods 0.000 abstract description 2
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 68
- 239000000243 solution Substances 0.000 description 36
- 235000011121 sodium hydroxide Nutrition 0.000 description 24
- 238000010438 heat treatment Methods 0.000 description 18
- 238000007599 discharging Methods 0.000 description 8
- 239000000463 material Substances 0.000 description 8
- 235000010755 mineral Nutrition 0.000 description 8
- 239000010410 layer Substances 0.000 description 7
- 238000002156 mixing Methods 0.000 description 7
- 239000011259 mixed solution Substances 0.000 description 6
- 239000012141 concentrate Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 4
- 239000001488 sodium phosphate Substances 0.000 description 4
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 4
- 229910000406 trisodium phosphate Inorganic materials 0.000 description 4
- 235000019801 trisodium phosphate Nutrition 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 239000012530 fluid Substances 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 229910001018 Cast iron Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000011068 loading method Methods 0.000 description 1
- 239000011268 mixed slurry Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000013049 sediment Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/18—Stationary reactors having moving elements inside
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0053—Details of the reactor
- B01J19/0066—Stirrers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J4/00—Feed or outlet devices; Feed or outlet control devices
- B01J4/001—Feed or outlet devices as such, e.g. feeding tubes
- B01J4/007—Feed or outlet devices as such, e.g. feeding tubes provided with moving parts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto
- B08B9/08—Cleaning containers, e.g. tanks
- B08B9/087—Cleaning containers, e.g. tanks by methods involving the use of tools, e.g. brushes, scrapers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
- B01J2219/00074—Controlling the temperature by indirect heating or cooling employing heat exchange fluids
- B01J2219/00087—Controlling the temperature by indirect heating or cooling employing heat exchange fluids with heat exchange elements outside the reactor
- B01J2219/00094—Jackets
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
The invention relates to the field of monazite smelting systems, in particular to a reaction kettle for decomposing rare earth ore of monazite by an alkaline method; the upper part of the autoclave body is provided with a driving mechanism; the output end of the driving mechanism is connected with the stirring mechanism so as to drive the stirring mechanism to rotate and move, and the stirring mechanism is positioned in the autoclave body; the outside of the autoclave body is provided with the intermediate layer mechanism, the upper portion of the autoclave body is link up and is provided with the feed inlet, through discharge gate and the liquid outlet that the autoclave body lower part was established, the discharge gate is used for carrying out the recovery of rare earth hydroxide slags, the liquid outlet is used for carrying out the alkali lye mixed liquor recovery of phosphorus lye, thereby the solid-liquid separation efficiency of monazite after the alkali decomposition has been improved, the setting of rabbling mechanism simultaneously, and utilize actuating mechanism's positive and negative rotation, can fully react mineral aggregate and alkali lye mixed liquor in the reation kettle, guarantee that the reaction fully goes on, can realize the discharge autoclave that rare earth hydroxide slags can efficient simultaneously, the reation kettle discharge gate jam has been avoided.
Description
Technical Field
The invention relates to the field of monazite smelting devices, in particular to a reaction kettle for decomposing rare earth ore of monazite by an alkaline method.
Background
The method for preparing rare earth chloride from mixed rare earth concentrate or monazite concentrate includes such steps as grinding monazite ore to proper particle size, mixing with caustic soda solution and concentrate, reaction in alkaline decomposing reactor, continuous feeding and discharging, alkali conversion of monazite ore in alkaline reaction to obtain rare earth and phosphorus separation, preparing rare earth hydroxide slag and mixed blade rich in trisodium phosphate solution, and loading the mixed solution of rare earth hydroxide slag in acid dissolving step to obtain rare earth chloride.
The monazite ore and caustic soda solution can be fully stirred and reacted in the alkali decomposition reactor, so that the preparation purity of the subsequent rare earth chloride is greatly influenced, the mixed solution containing trisodium phosphate solution after the reaction needs to be subjected to solid-liquid separation with the rare earth hydroxide slag, the existing separation is that the mixed solution after the reaction is placed in a Chen Chenjiang tank for standing and sedimentation, and then the solid-liquid separation is carried out, so that the preparation efficiency in the whole process is reduced.
Disclosure of Invention
The invention provides a reaction kettle for decomposing monazite rare earth ore by an alkaline method, which aims to solve the technical problems that the recycling rate of resources needs to be improved, the full utilization of raw material preparation and the treatment of waste gas pollution are inconvenient and safety accidents exist in the process of pouring molten materials.
The technical problems of the invention are realized by the following technical scheme: the reaction kettle for decomposing monazite rare earth ore by an alkaline method comprises an autoclave body, a driving mechanism, a stirring mechanism and an interlayer mechanism, wherein the driving mechanism is arranged at the upper part of the autoclave body; the output end of the driving mechanism is connected with the stirring mechanism so as to drive the stirring mechanism to rotate, and the stirring mechanism is positioned in the autoclave body; an interlayer mechanism is arranged outside the autoclave body, a feed inlet is arranged on the upper part of the autoclave body in a penetrating way, a discharge outlet and a liquid outlet are arranged on the lower part of the autoclave body in a penetrating way, and the liquid outlet is positioned above the discharge outlet; the lower end of the stirring mechanism is positioned in the discharge hole.
Through using above technical scheme, divide and be equipped with discharge gate and liquid outlet, the discharge gate is used for carrying out the recovery of rare earth slag hydroxide, the liquid outlet is used for carrying out the alkali lye mixed liquor recovery of phosphorus lye to improved the solid-liquid separation efficiency of monazite after alkali decomposition, accelerated process flow, promoted efficiency, rabbling mechanism's setting simultaneously, and utilize driving mechanism's positive and negative rotation, can fully react mineral aggregate and alkali lye mixed liquor in the reation kettle, guarantee that the reaction is fully gone on, can realize that rare earth slag hydroxide can the efficient discharge autoclave simultaneously, avoided the reation kettle discharge gate to block up.
Preferably, the interlayer mechanism is provided with an air inlet, an air outlet and a condensation port in a penetrating way, the air inlet is positioned on the upper side part of the interlayer mechanism, the air outlet is oppositely arranged on the lower side part of the interlayer mechanism, and the interlayer mechanism below the air outlet is provided with the condensation port.
Through using above technical scheme, provide two kinds of different intermediate layer heating methods, both can utilize the air inlet to let in vapor, the gas outlet discharges vapor, realizes steam heating's mode, can also utilize gas outlet or condensation mouth as the entry simultaneously, the air inlet is as the export, realizes liquid heating's mode, provides different heating methods for the reaction of alkali lye and monazite.
Preferably, the stirring mechanism comprises a stirring shaft, a lower spiral part, a wall scraping part and a blade part; the upper part of the stirring shaft is connected with the output end of the driving mechanism, and the stirring shaft is sequentially provided with a lower spiral part, a wall scraping part and a blade part from bottom to top, so that the lower spiral part is positioned in the discharge hole.
Preferably, the lower spiral part is a spiral blade, and the outer diameter of the spiral blade is attached to the inner diameter of the discharge hole.
Through the use of the technical scheme, the discharging mode of the helical blade of the lower helical part is that after the completion of standing and sedimentation, sodium hydroxide slag can be orderly discharged out of the autoclave body, the blockage of a discharging hole is prevented, the difficulty of solid-liquid separation is reduced, the efficiency is improved, and meanwhile, the positive and negative rotation of the driving mechanism is utilized, so that the slag at the bottom of the autoclave body is continuously stirred by the lower helical part, and the slag and alkali solution are fully reacted.
Preferably, the scraping wall part comprises a scraping wall beam and scraping wall plates, the scraping wall beam is fixedly arranged on the stirring shaft, and a plurality of scraping wall plates are arranged on the scraping wall beam at intervals.
Preferably, the scraping plates comprise a first scraping plate and a second scraping plate, the first scraping plate and the second scraping plate are obliquely arranged on scraping beams on two sides of the stirring shaft respectively, and the first scraping plate and the second scraping plate are obliquely arranged opposite to each other.
Through the adoption of the technical scheme, when the solid-liquid separation of the products after reaction is carried out and discharged, the first scraping wall plate and the second scraping wall plate can smoothly convey the rare earth hydroxide slag into and out of the discharge port, so that the slag is smoothly discharged out of the autoclave body, when slag reacts with alkali solution, the scraping wall plate which is arranged in a reverse inclined mode relatively continuously stirs slag with relatively large bottom concentration upwards, so that the slag can fully react with the alkali solution in the autoclave body, and the reaction is fully ensured.
Preferably, the blade part comprises a blade frame and a blade, wherein the blade frame is fixedly arranged on the stirring shaft, and the blade frame is provided with the blade.
Preferably, the paddle blade is also provided with a plurality of stirring holes.
Through the adoption of the technical scheme, the paddle parts are arranged, so that monazite ore in the upper layer in the autoclave body fully reacts with the alkali solution, and the mixed solution in the upper layer can irregularly flow due to the arrangement of the stirring holes, so that the fully stirring and mixing of mineral aggregate and the alkali solution are further ensured.
Preferably, the upper part of the autoclave body is provided with a liquid supplementing port.
Through the technical scheme, the setting of the fluid infusion mouth can timely supplement the quantity of the alkali solution in the autoclave body, and the insufficient condition of the reaction of the alkali solution and the monazite concentrate is prevented.
Preferably, the autoclave body is made of stainless steel.
In summary, the invention has the following beneficial effects:
1. according to the reaction kettle for decomposing the monazite rare earth ore by the alkaline method, the discharge hole and the liquid outlet are respectively arranged, the discharge hole is used for recycling the rare earth slag hydroxide, and the liquid outlet is used for recycling the alkali liquor mixed liquor of the phosphorus alkali liquor, so that the solid-liquid separation efficiency of the monazite after the alkaline decomposition is improved, the process flow is accelerated, the efficiency is improved, meanwhile, the stirring mechanism is arranged, the mineral aggregate in the reaction kettle and the alkali liquor mixed liquor can be fully reacted by utilizing the positive and negative rotation of the driving mechanism, the reaction is fully performed, the rare earth slag hydroxide can be effectively discharged out of the high-pressure reaction kettle, and the blockage of the discharge hole of the reaction kettle is avoided.
2. Further, the structural design of the interlayer mechanism provides two different interlayer heating modes, namely, the air inlet can be used for introducing water vapor, the air outlet can be used for discharging the water vapor, the steam heating mode is realized, meanwhile, the air outlet or the condensation port can be used as an inlet, the air inlet is used as an outlet, the liquid heating mode is realized, and different heating modes are provided for the reaction of alkali liquor and monazite.
3. Secondly, the spiral blade's of lower spiral part ejection of compact mode, after settling the completion of standing, can be orderly with the sodium hydroxide slag discharge autoclave internal, prevent the jam of discharge gate, reduce the difficulty of solid-liquid separation, promote efficiency, simultaneously, utilize actuating mechanism's positive and negative rotation for the slag of lower spiral part constantly stirs autoclave body bottom makes it fully react with the alkali solution.
4. Furthermore, when the setting of wallboard and second scraping the wallboard is scraped to first scraping the wallboard and the second scraping the wallboard and can be smooth when carrying out the product solid-liquid separation discharge after the reaction, carry the rare earth hydroxide slags into the discharge gate with the second scraping the wallboard to make slags discharge autoclave body smoothly, when carrying out slags and alkali solution reaction, the scraping the wallboard of slope setting relatively dorsad constantly upwards stirs the slags that bottom concentration is great relatively, thereby make slags and alkali solution can be abundant react in autoclave body, guarantee that the reaction fully goes on.
5. The paddle parts are arranged, so that monazite ore in the upper layer in the autoclave body fully reacts with the alkali solution, and the stirring holes are arranged, so that the mixed solution in the upper layer can irregularly flow, and the full stirring and mixing of the mineral aggregate and the alkali solution are further ensured; the arrangement of the liquid supplementing port can timely supplement the amount of the alkali solution in the autoclave body and prevent the insufficient condition of the reaction of the alkali solution and the monazite concentrate.
Drawings
FIG. 1 is a schematic front sectional view of a reaction kettle structure of the invention;
FIG. 2 is a schematic structural view of a stirring mechanism;
FIG. 3 is a schematic diagram of the sedimentation layering state of trisodium phosphate solution and sodium hydroxide slag;
fig. 4 is a schematic view of the wall scraping structure.
Reference numerals illustrate:
1. an autoclave body; 2. a driving mechanism; 3. a stirring mechanism; 31. a stirring shaft; 32. a lower spiral part; 33. scraping wall parts; 331. scraping a wall beam; 332. scraping a wall plate; 3321. a first scraping plate; 3322. a second scraping plate; 34. a blade portion; 341. blade frame; 342. a paddle blade; 343. stirring holes; 4. an interlayer mechanism; 5. A feed inlet; 6. a discharge port; 7. a liquid outlet; 8. an air inlet; 9. an air outlet; 10. a condensing port; 11. and a fluid supplementing port.
Detailed Description
In order that the above objects, features and advantages of the invention will be more clearly understood, a further description of the invention will be rendered by reference to the appended drawings and examples.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced otherwise than as described herein, and therefore the present invention is not limited to the specific embodiments of the disclosure that follow.
Example 1: the reaction kettle for decomposing monazite rare earth ore by an alkaline method comprises an autoclave body 1, a driving mechanism 2, a stirring mechanism 3 and an interlayer mechanism 4, wherein the autoclave body 1 is preferably made of stainless steel, and can also be made of cast iron and other materials, the autoclave body has stronger alkali resistance and meets the use requirement of the alkaline method decomposition, and the driving mechanism 2 is arranged at the upper part of the autoclave body 1; the driving mechanism 2 comprises, but is not limited to, a driving motor, a speed reducer and a sealing device arranged between the autoclave body 1 and a transmission shaft, wherein the driving motor preferably adopts a motor capable of rotating positively and negatively as a driving source, the output end of the driving mechanism 2 is connected with the stirring mechanism 3 so as to drive the stirring mechanism 3 to rotate, and the stirring mechanism 3 is positioned in the autoclave body 1; the stirring mechanism 3 is used as a stirring device for monazite ore and caustic soda solution in the autoclave body 1, so as to ensure the full stirring and mixing of the monazite ore and the caustic soda solution, an interlayer mechanism 4 is arranged outside the autoclave body 1, the interlayer mechanism 4 is used as a device for heating the inside of the autoclave body 1, two heating modes of steam heating or liquid heating can be adopted, the upper part of the autoclave body 1 is communicated with a feed inlet 5, and the feed inlet 5 receives the mixed solution of the monazite ore and the caustic soda which are primarily stirred and mixed in the stirrer, and is connected with the feed inlet 5 through a pipeline of a pump conveying device and conveyed into the autoclave body 1; the lower part of the autoclave body 1 is provided with a discharge hole 6 and a liquid outlet 7 in a penetrating way, and the liquid outlet 7 is positioned above the discharge hole 6; thereby avoid the problem that solid-liquid separation efficiency that single discharge gate leads to is slow, and helical blade of rabbling mechanism 3 lower extreme is located discharge gate 6.
The method comprises the following specific steps: the stirring mechanism 3 includes a stirring shaft 31, a lower screw portion 32, a scraping wall portion 33, and a paddle portion 34; the stirring shaft 31 is used as a connecting driving shaft and is vertically arranged in the autoclave body 1, the upper end of the stirring shaft 31 is connected with the output end of the driving mechanism 2,
the upper part of the stirring shaft 31 is connected with the output end of the driving mechanism 2, a lower spiral part 32, a scraping wall part 33 and a paddle part 34 are sequentially arranged on the stirring shaft 31 from bottom to top, wherein the lower spiral part 32 is a spiral blade, the spiral blade is circumferentially arranged at the bottom end of the stirring shaft 31, and the lower spiral part 32 is positioned in the discharge port 6; the outer diameter of the helical blade of the lower helical part 32 is attached to the inner diameter of the discharge hole 6 to form a helical discharge structure, and the reacted rare earth hydroxide slag is controllably discharged into the autoclave body 1, so that the negative pressure effect in a single outlet is prevented, and the difficulty of solid-liquid separation is reduced. When the lower screw part 32 rotates forward to screw for discharging, the turnover work of the screw motor is utilized for stirring, and the ore materials which are continuously settled towards the bottom are floated upwards to fully react with caustic soda solution.
Wherein, as shown in fig. 4; the scraping wall part 33 comprises a scraping wall beam 331 and a scraping wall plate 332, the scraping wall beam 331 is fixedly arranged on the stirring shaft 31, a plurality of scraping wall plates 332 are arranged on the scraping wall beam 331 at intervals, further, the scraping wall plate 332 comprises a first scraping wall plate 3321 and a second scraping wall plate 3322, the first scraping wall plate 3321 and the second scraping wall plate 3322 are respectively obliquely arranged on the scraping wall beam 331 on two sides of the stirring shaft 31, the first scraping wall plate 3321 and the second scraping wall plate 3322 are oppositely and obliquely arranged, namely, the extending direction of the scraping wall plate 332 is not perpendicular to the bottom of the autoclave body 1, but is in an oblique angle state, the obliquely arranged plate surface can reduce resistance in mixed liquid in the stirring process, and more importantly, when the lower spiral part 32 rotates out materials, the scraping wall plate 332 and the sharp angle surface formed at the bottom of the autoclave body 1 can help to push and rotate out sediments; preventing slow discharge at the bottom of the autoclave body 1; when the lower spiral part 32 is stirred in the opposite direction, the relative obtuse angle surface formed by the scraping plate 332 and the bottom of the autoclave body 1 is utilized to continuously lift up the mineral aggregate at the bottom, so that the mineral aggregate and caustic soda solution are fully reacted, and the reaction rate is ensured.
Further, the paddle part 34 includes a paddle frame 341 and a paddle blade 342, the paddle frame 341 is fixedly mounted on the stirring shaft 31, and the paddle blade 342 is mounted on the paddle frame 341; the stirring and mixing device is used for stirring and mixing the mineral aggregate on the upper part and the caustic soda solution, the paddle blade 342 is also provided with a plurality of stirring holes 343, and the stirring holes 343 are arranged, so that the paddle part 34 generates irregular water flow in the process of rotating and stirring, and the stirring degree of the mineral aggregate in the caustic soda solution can be increased.
Wherein, the interlayer mechanism 4 is provided with an air inlet 8, an air outlet 9 and a condensation port 10 in a penetrating way, the air inlet 8 is positioned at the upper side part of the interlayer mechanism 4, the air outlet 9 is oppositely arranged at the lower side part of the interlayer mechanism 4, and the interlayer mechanism 4 below the air outlet 9 is provided with the condensation port 10; therefore, two different interlayer heating modes are provided, namely, the steam is introduced through the air inlet 8, the steam is discharged through the air outlet 9, the steam heating mode is realized, meanwhile, the air outlet 9 or the condensation port 10 is used as an inlet, the air inlet 8 is used as an outlet, the liquid heating mode is realized, and different heating modes are provided for the reaction of alkali liquor and monazite.
The upper part of the autoclave body 1 is also provided with a liquid supplementing port 11 for supplementing caustic soda solution so as to prevent insufficient reaction caused by insufficient consumption of the caustic soda solution.
The reaction kettle for decomposing the solitary rare earth ore by the alkaline method disclosed by the invention has the following working mode: first, solitary Dan Kuangliao is mixed with caustic soda solution in a mixer in advance to form a slurry state, and then the mixed slurry is pumped into autoclave body 1 through feed port 5 by a pump and a connecting pipeline, and liquid replenishing port 11 is communicated with a caustic soda solution supply device for replenishing caustic soda solution in autoclave body 1 at any time.
When the steam heating is adopted, the steam supply device leads the steam into the interlayer mechanism 4 through the air inlet 8 and discharges the steam through the air outlet 9, and meanwhile, the condensation port 10 communicated with the bottom is used as a condensed water recovery port in the interlayer mechanism 4, and the steam heating mode is adopted to transfer the temperature required by the reaction in the autoclave body 1.
When the driving motor of the driving mechanism 2 rotates forward to be used as the discharging direction of the lower spiral part 32, the driving motor turns over, the lower spiral part 32 turns over, the spiral blades continuously float up the ore material settled towards the bottom, so that the ore material is stirred and mixed with caustic soda solution in the kettle, meanwhile, the first scraping wall plate 3321 and the second scraping wall plate 3322 are reversely arranged, when in a stirring state, the settled ore material at the bottom of the kettle body is continuously floated up by using the obtuse angle slope formed by the scraping wall plates 332 and the bottom of the high-pressure kettle body 1, so that the ore material and the caustic soda solution are fully mixed and stirred, and the paddle parts 34 at the upper part also realize the mixing and stirring of the ore material and the solution at the upper layer.
After the reaction is sufficient, standing and settling are carried out, the settled rare earth hydroxide slag is positioned at the bottom of the autoclave body 1, and the mixed clear liquid of trisodium phosphate solution and unreacted complete caustic soda solution on the upper layer is firstly discharged from a liquid outlet 7; when the driving mechanism 2 rotates positively, the lower spiral part 32 forms a spiral discharging mode to screw out slag, and meanwhile, the scraping plate 332 and the sharp angle surface formed at the bottom of the autoclave body 1 continuously convey the slag to the direction of the discharging hole 6 in the rotating process, so that the slag is convenient to screw out.
The present invention is not limited to the above embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification and equivalent changes to the above embodiments according to the technical substance of the present invention are still within the scope of the technical solution of the present invention.
Claims (10)
1. A reaction kettle for decomposing monazite rare earth ore by an alkaline method is characterized in that: the high-pressure kettle comprises a high-pressure kettle body (1), a driving mechanism (2), a stirring mechanism (3) and an interlayer mechanism (4), wherein the driving mechanism (2) is arranged at the upper part of the high-pressure kettle body (1); the output end of the driving mechanism (2) is connected with the stirring mechanism (3) so as to drive the stirring mechanism (3) to rotate, and the stirring mechanism (3) is positioned in the autoclave body (1); an interlayer mechanism (4) is arranged outside the autoclave body (1), a feed inlet (5) is arranged on the upper portion of the autoclave body (1) in a penetrating manner, a discharge outlet (6) and a liquid outlet (7) are arranged on the lower portion of the autoclave body (1) in a penetrating manner, and the liquid outlet (7) is positioned above the discharge outlet (6); the lower end of the stirring mechanism (3) is positioned in the discharge hole (6).
2. The reaction kettle for decomposing monazite rare earth ore by alkaline process as claimed in claim 1, wherein: the air inlet (8), the air outlet (9) and the condensation port (10) are formed in the interlayer mechanism (4) in a penetrating mode, the air inlet (8) is located at the upper side portion of the interlayer mechanism (4), the air outlet (9) is arranged on the lower side portion of the interlayer mechanism (4) relatively, and the condensation port (10) is formed in the interlayer mechanism (4) below the air outlet (9).
3. The reaction kettle for decomposing monazite rare earth ore by alkaline process as claimed in claim 1, wherein: the stirring mechanism (3) comprises a stirring shaft (31), a lower spiral part (32), a scraping wall part (33) and a paddle part (34); the upper part of the stirring shaft (31) is connected with the output end of the driving mechanism (2), and the stirring shaft (31) is sequentially provided with a lower spiral part (32), a scraping wall part (33) and a paddle part (34) from bottom to top, so that the lower spiral part (32) is positioned in the discharge port (6).
4. A reaction kettle for decomposing monazite rare earth ore by an alkaline process according to claim 3, wherein: the lower spiral part (32) is a spiral blade, and the outer diameter of the spiral blade is attached to the inner diameter of the discharge hole (6).
5. The reaction kettle for decomposing monazite rare earth ore by an alkaline process as claimed in claim 4, wherein: the scraping wall part (33) comprises a scraping wall beam (331) and scraping wall plates (332), the scraping wall beam (331) is fixedly arranged on the stirring shaft (31), and a plurality of scraping wall plates (332) are arranged on the scraping wall beam (331) at intervals.
6. The reaction kettle for decomposing monazite rare earth ore by an alkaline process according to claim 5, wherein the reaction kettle is characterized in that: the scraping wall plates (332) comprise a first scraping wall plate (3321) and a second scraping wall plate (3322), the first scraping wall plate (3321) and the second scraping wall plate (3322) are obliquely arranged on scraping wall beams (331) on two sides of the stirring shaft (31) respectively, and the first scraping wall plate (3321) and the second scraping wall plate (3322) are obliquely arranged opposite to each other.
7. A reaction kettle for decomposing monazite rare earth ore by an alkaline process according to claim 3, wherein: the paddle part (34) comprises a paddle frame (341) and paddle blades (342), wherein the paddle frame (341) is fixedly arranged on the stirring shaft (31), and the paddle blades (342) are arranged on the paddle frame (341).
8. The reaction kettle for decomposing monazite rare earth ore by alkaline process as claimed in claim 7, wherein: the paddle blade (342) is also provided with a plurality of stirring holes (343).
9. The reaction kettle for decomposing monazite rare earth ore by alkaline process as claimed in claim 1, wherein: the upper part of the autoclave body (1) is also provided with a liquid supplementing port (11).
10. The reaction kettle for decomposing monazite rare earth ore by alkaline process as claimed in claim 1, wherein: the autoclave body (1) is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310690575.XA CN116617983A (en) | 2023-06-12 | 2023-06-12 | Reaction kettle for decomposing monazite rare earth ore by alkaline method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310690575.XA CN116617983A (en) | 2023-06-12 | 2023-06-12 | Reaction kettle for decomposing monazite rare earth ore by alkaline method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116617983A true CN116617983A (en) | 2023-08-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310690575.XA Pending CN116617983A (en) | 2023-06-12 | 2023-06-12 | Reaction kettle for decomposing monazite rare earth ore by alkaline method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116617983A (en) |
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2023
- 2023-06-12 CN CN202310690575.XA patent/CN116617983A/en active Pending
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