Red mud separation device for producing aluminum oxide by Bayer process
By designing a red mud separation device that includes stirring and centrifugal scraping functions, the problem of easy clogging of red mud separation equipment in Bayer process alumina production was solved, achieving efficient separation of red mud and liquid and improving the alumina recovery rate.
Patent Information
- Application Number
- CN202422843078.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-11-07
- Estimated Expiration
- 2034-11-21
AI Technical Summary
In the existing Bayer process for alumina production, the filter plates of the red mud separation equipment are prone to clogging, resulting in low filtration and sedimentation efficiency, long sedimentation time, and affecting the alumina recovery rate.
A red mud separation device was designed, comprising a barrel, a partition plate, a filter cylinder, a stirring mechanism, and a sewage pump. Through stirring and mixing, centrifugal scraping, and the addition of flocculants, the device achieves efficient separation of red mud and liquid, and uses a centrifugal scraping mechanism to automatically clean up the sediment.
It improves the separation efficiency of red mud and liquid, reduces filtration and settling time, enhances the cleaning effect, and increases the recovery rate of alumina.
Smart Images
Figure CN223517027U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of red mud separation of alumina production, more specifically, the utility model relates to the red mud separation device of bayer method production alumina. BACKGROUND
[0002] Bayer method is an important alumina production method, and the production process of the bayer method is that bauxite is crushed and mixed with circulating mother liquor (sodium hydroxide solution) and ground, and pre-desilication treatment may be needed for high-silicon bauxite, the raw ore slurry is dissolved in a high-temperature and high-pressure dissolver, and after dissolution, the red mud is separated by sedimentation or filtration, the red mud is washed and discharged, and aluminum hydroxide crystals are added to the sodium aluminate solution, and the decomposed slurry is separated from the aluminum hydroxide precipitate and the decomposed mother liquor by a grading device, and the decomposed mother liquor is evaporated and concentrated in a multi-effect evaporator, and after the concentration of caustic alkali is increased, it is recycled for preparation of the raw ore slurry.
[0003] In the process of bayer method production of alumina, red mud separation is a key link, and the red mud is a solid waste produced in the bauxite dissolution process, mainly containing iron oxide, titanium dioxide, residual silicon dioxide and other impurities, and effective separation of the red mud can reduce the loss of alumina, because a certain amount of alumina remains in the red mud, and if the separation is not complete, the alumina recovery rate will decrease.
[0004] The existing red mud separation usually adopts methods such as sedimentation and filtration, and in the sedimentation process, a flocculating agent is added to accelerate the sedimentation speed of the red mud, for example, a commonly used polyacrylamide flocculating agent can make the red mud particles agglomerate and grow larger, and settle faster at the bottom of the container, and filtration is to separate the red mud and the solution through a filter medium (such as filter cloth, ceramic membrane, etc.), to obtain a clear sodium aluminate solution.
[0005] The current red mud filtration and sedimentation equipment has the problem that the filter holes of the filter plate are easily blocked for a long time, affecting the filtration and sedimentation effect, and the red mud is filtered and settled by its own gravity, resulting in a long filtration and sedimentation time and low efficiency. UTILITY MODEL CONTENTS
[0006] In order to overcome the above-mentioned defects of the prior art, the utility model provides a red mud separation device for bayer method production of alumina, to solve the problems raised in the above background.
[0007] In order to achieve the above object, the utility model provides the following technical scheme: the red mud separation device of bayer method production alumina, including the barrel, the inner chamber fixedly connected with the partition of barrel, the inner chamber bottom fixedly connected with the support platform of barrel, support the filter cartridge through the support platform, the top of support platform is equipped with the clamping groove, the middle part of clamping groove is provided with filter cartridge, the filter cartridge is positioned through the clamping groove, improve the stability of filter cartridge placement, and through filter cartridge can be separated to red mud and liquid filtration, the bottom of barrel is provided with sewage pump, and the precipitate is conveniently discharged through sewage pump, the top of barrel is provided with flocculating agent adding box and feed pipe, and the flocculating agent is conveniently added through flocculating agent adding box, and the raw material is conveniently input through feed pipe;
[0008] The middle part of the barrel is provided with a stirring mechanism, the stirring mechanism comprises a motor fixed on the top of the barrel, the output end of the motor is connected with a rotating rod, the bottom end of the rotating rod extends to the middle part of the clamping groove and is provided with a centrifugal scraping mechanism, the top end of the rotating rod is fixedly connected with a support rod, the bottom end of the support rod is fixedly connected with a first stirring plate, and one end of the support rod is fixedly connected with a stabilizing ring.
[0009] The middle part of the pipeline communicated between the bottom of the barrel and the sewage pump is provided with a first valve, the middle part of the through hole of the partition is provided with a second valve, and the middle part of the discharge pipe of the flocculating agent adding box is provided with a flow valve.
[0010] Preferably, the bottom of the barrel is fixedly connected with support legs symmetrically around, the top wall of the support platform is provided as a conical structure, the bottom wall of the inner chamber of the barrel is provided as a horn-shaped structure, and the top wall of the partition is provided as a cone.
[0011] Preferably, the clamping groove is matched with the filter cartridge, the filter cartridge is arranged in the inside of the clamping groove, and the bottom of one side of the barrel is fixedly connected with a liquid outlet pipe.
[0012] Preferably, the support rod and the first stirring plate are arranged on the top of the partition, and a plurality of small holes are formed in the surface of the first stirring plate.
[0013] Preferably, the centrifugal scraping mechanism comprises a second stirring plate fixed around the bottom end of the rotating rod, a connecting plate is inserted on one side of the second stirring plate, one end of the connecting plate extends to the inside of the second stirring plate and is fixedly connected with a limiting strip, and a plurality of springs are arranged in the middle part of the second stirring plate.
[0014] Preferably, one end of the connecting plate is fixedly connected with a scraping rod, the wall of the scraping rod is matched with the wall of the filter cartridge, the bottom end of the scraping rod is fixedly connected with a scraping strip, and the scraping strip is matched with the top wall of the support platform.
[0015] Preferably, the top of the scraping strip is fixedly connected with an arc-shaped plate, and the top end of the arc-shaped plate is fixedly connected with the bottom wall of the second stirring plate.
[0016] The technical effects and advantages of the present application are as follows:
[0017] 1. The present application first controls the first stirring plate to stir and mix the raw liquid and the flocculating agent through the starting motor, improves the sedimentation efficiency, opens the second valve to input the mixed liquid to the top of the support table, realizes the separation of the red mud and the liquid through the filter cartridge, drives the second stirring plate and the connecting plug plate to rotate through the rotating rod, centrifugally stirs the liquid, makes the liquid flow out to the outside of the filter cartridge through the filtration of the filter cartridge, and realizes the automatic cleaning effect through the scraping of the scraping rod and the scraping strip, conveniently discharges the precipitate, and improves the cleaning effect.
[0018] 2. The present application further improves the stability of the rotation of the first stirring plate through the setting of the stabilizing ring, improves the adhesion strength of the scraping strip and the top wall of the support table through the arc-shaped plate, improves the adhesion effect of the scraping rod and the filter cartridge through the pushing of the connecting plug plate by the spring, thereby improving the scraping and cleaning quality, and conveniently adds the flocculating agent through the flocculating agent adding box, and improves the use effect.
[0019] In summary, through the mutual influence of the above-mentioned multiple effects, the raw liquid and the flocculating agent can be conveniently stirred and mixed, the sedimentation efficiency is improved, centrifugal stirring can be carried out during filtration, the solid-liquid separation efficiency is improved, and the scraping and cleaning quality is improved. BRIEF DESCRIPTION OF DRAWINGS
[0020] Figure 1 It is a whole structure schematic view of the present application.
[0021] Figure 2 It is a sectional structure schematic view of the present application.
[0022] Figure 3 It is a sectional structure schematic view of the barrel body of the present application.
[0023] Figure 4 It is a structure schematic view of the stirring mechanism of the present application.
[0024] Figure 5 It is a split structure schematic view of the stirring mechanism of the present application.
[0025] The attached diagram is labeled as follows: 1. Barrel body; 2. Divider plate; 3. Support platform; 4. Slot; 5. Filter cylinder; 6. Sewage pump; 7. First valve; 8. Second valve; 9. Flocculant addition box; 10. Feed pipe; 11. Motor; 12. Rotating rod; 13. Support rod; 14. First stirring plate; 15. Stabilizing ring; 16. Second stirring plate; 17. Connecting plate; 18. Scraper rod; 19. Scraper strip; 20. Arc plate; 21. Spring; 22. Liquid outlet pipe; 23. Support leg. Detailed Implementation
[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0027] As attached Figures 1-5 The red mud separation device for Bayer process alumina production shown includes a barrel 1, a partition plate 2 fixedly connected to the inner cavity of the barrel 1, a support platform 3 fixedly connected to the bottom of the inner cavity of the barrel 1, a filter cylinder 5 supported by the support platform 3, a slot 4 opened at the top of the support platform 3, a filter cylinder 5 set in the middle of the slot 4, the slot 4 limits the position of the filter cylinder 5, improves the stability of the filter cylinder 5, and the filter cylinder 5 can filter and separate red mud and liquid. A sewage pump 6 is set at the bottom of the barrel 1, which facilitates the discharge of sediment. A flocculant addition box 9 and a feed pipe 10 are set at the top of the barrel 1, which facilitates the addition of flocculant through the flocculant addition box 9 and the input of raw materials through the feed pipe 10.
[0028] The middle part of the barrel body 1 is provided with a stirring mechanism, through which the input flocculating agent and liquid can be mixed to improve the sedimentation efficiency. The stirring mechanism comprises a motor 11 fixed on the top of the barrel body 1, the output end of the motor 11 is connected with a rotating rod 12, the bottom end of the rotating rod 12 extends to the middle part of the clamping groove 4 and is provided with a centrifugal scraping mechanism, the top end of the rotating rod 12 is fixedly connected with a supporting rod 13, the bottom of the supporting rod 13 is fixedly connected with a first stirring plate 14, one end of the supporting rod 13 is fixedly connected with a stabilizing ring 15, the bottom of the barrel body 1 is connected with a pipeline communicated with the sewage pump 6, the middle part of the pipeline is provided with a first valve 7, the middle part of the through hole of the partition plate 2 is provided with a second valve 8, and the middle part of the discharge pipe of the flocculating agent adding box 9 is provided with a flow valve. The motor 11 is started to control the rotation of the rotating rod 12, so that the first stirring plate 14 stirs the liquid on the top of the partition plate 2, improves the mixing and sedimentation effect, and improves the stability of the rotation of the first stirring plate 14 through the stabilizing ring 15. The centrifugal scraping mechanism driven by the rotating rod 12 can centrifugally separate the liquid in the middle part of the filter cylinder 5, and conveniently scrape and clean the dust on the surface of the filter cylinder 5, thereby improving the use effect. The first valve 7 is used to conveniently control the discharge of the separated sediment, and the second valve 8 is used to conveniently control the falling of the liquid and solid after precipitation on the top of the partition plate 2 to the middle part of the filter cylinder 5, and the flow valve is used to conveniently control the input of the flocculating agent in the flocculating agent adding box 9 into the barrel body 1.
[0029] The bottom of the barrel body 1 is fixedly connected with supporting legs 23, the top wall of the supporting table 3 is provided in a conical structure, the bottom wall of the inner cavity of the barrel body 1 is provided in a horn-shaped structure, the top wall of the partition plate 2 is provided in a conical structure, the clamping groove 4 is matched with the filter cylinder 5, the filter cylinder 5 is arranged in the clamping groove 4, the bottom of one side of the barrel body 1 is fixedly connected with a liquid outlet pipe 22, the supporting rod 13 and the first stirring plate 14 are arranged on the top of the partition plate 2, a plurality of small holes are formed in the surface of the first stirring plate 14, the stability of the barrel body 1 is improved through the supporting legs 23, the liquid on the bottom of the supporting table 3, the partition plate 2 and the inner cavity of the barrel body 1 is conveniently gathered through the conical bottom wall, the discharge is conveniently carried out, the use effect is improved, the filter cylinder 5 is limited through the clamping groove 4, the stability of the filter cylinder 5 is improved, the filtered liquid is conveniently discharged through the liquid outlet pipe 22, the liquid and the flocculating agent on the top of the partition plate 2 are stirred through the supporting rod 13 and the first stirring plate 14, and the sedimentation effect is improved.
[0030] The centrifugal scraping mechanism comprises a second stirring plate 16 fixed around the bottom end of the rotating rod 12, a connecting plug plate 17 inserted on one side of the second stirring plate 16, a limiting strip fixedly connected to one end of the connecting plug plate 17, a plurality of springs 21 arranged in the middle of the second stirring plate 16, a scraping rod 18 fixedly connected to one end of the connecting plug plate 17, a wall body of the scraping rod 18 being in close contact with a wall body of the filter cylinder 5, a scraping strip 19 fixedly connected to the bottom end of the scraping rod 18, the scraping strip 19 being in close contact with the top wall body of the supporting table 3, an arc-shaped plate 20 fixedly connected to the top of the scraping strip 19, the top end of the arc-shaped plate 20 being fixedly connected to the bottom wall body of the second stirring plate 16, and the rotating rod 12 drives the second stirring plate 16 to rotate, the connecting plug plate 17 drives the scraping rod 18 to rotate, the second stirring plate 16 and the connecting plug plate 17 rotate, the liquid and the sediment mixture in the middle of the filter cylinder 5 are stirred, the liquid flows into the inner cavity of the barrel body 1 through the filter cylinder 5, and is discharged through the liquid outlet pipe 22, the connecting plug plate 17 drives the scraping rod 18 and the scraping strip 19 to rotate, the top wall body of the supporting table 3 and the inner cavity wall body of the clamping groove 4 are scraped and cleaned, the sediment is collected in the middle and discharged, and the arc-shaped plate 20 improves the close contact effect of the scraping strip 19 and the top wall body of the supporting table 3.
[0031] It is worth noting that the barrel body 1 is provided with a maintenance door corresponding to the filter cylinder 5, and the inner wall of the filter cylinder 5 is provided with filter cloth in close contact with the filter cylinder 5 to filter the mixed liquid.
[0032] The working principle of the utility model is as follows: when in use, only need to input the raw materials into the barrel body 1 through the feeding pipe 10 and locate them on the top of the partition plate 2, then control the flocculant in the flocculant adding box 9 to be added to the middle of the partition plate 2 through the flow valve, then start the motor 11 to control the rotating rod 12 to drive the supporting rod 13 and the first stirring plate 14 to rotate for stirring, thereby improving the sedimentation effect.
[0033] Then open the second valve 8 to make the materials enter the top of the supporting table 3, pass through the filter cylinder 5 for filtering, and drive the second stirring plate 16 and the connecting plug plate 17 to rotate through the rotating rod 12, thereby scraping the sediment attached to the surface of the filter cylinder 5, realizing the centrifugal effect, making the liquid pass through the filter cylinder 5 and be located around the inner cavity of the barrel body 1, and being discharged through the liquid outlet pipe 22, thereby realizing the separation effect.
[0034] The sediment can be discharged by starting the sewage pump 6 to open the first valve 7, thereby improving the use effect.
[0035] The above only describes the preferred embodiments of the utility model and is not used for limiting the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.
Claims
1. A red mud separation device for Bayer process alumina production, comprising a barrel (1), characterised in that: The inner cavity of the barrel body (1) is fixedly connected with a partition plate (2), the bottom of the inner cavity of the barrel body (1) is fixedly connected with a support table (3), the top of the support table (3) is provided with a clamping groove (4), the middle of the clamping groove (4) is provided with a filter cylinder (5), the bottom of the barrel body (1) is provided with a sewage pump (6), and the top of the barrel body (1) is provided with a flocculating agent adding box (9) and a feeding pipe (10). The middle of the barrel body (1) is provided with a stirring mechanism, which comprises a motor (11) fixed on the top of the barrel body (1), the output end of the motor (11) is connected with a rotating rod (12), the bottom end of the rotating rod (12) extends to the middle of the clamping groove (4) and is provided with a centrifugal scraping mechanism, the top end of the rotating rod (12) is fixedly connected with a supporting rod (13), the bottom of the supporting rod (13) is fixedly connected with a first stirring plate (14), and one end of the supporting rod (13) is fixedly connected with a stabilizing ring (15). The first valve (7) is arranged in the pipeline communicated between the bottom of the barrel body (1) and the sewage pump (6), the second valve (8) is arranged in the middle of the through hole of the partition plate (2), and the flow valve is arranged in the middle of the discharging pipe of the flocculating agent adding box (9).
2. The red mud separation apparatus for the Bayer process for the production of alumina as claimed in claim 1, wherein: The bottom of the barrel body (1) is fixedly connected with supporting legs (23) symmetrically, the top wall of the support table (3) is provided in a conical structure, the bottom wall of the inner cavity of the barrel body (1) is provided in a horn-shaped structure, and the top wall of the partition plate (2) is provided in a conical structure.
3. The red mud separation apparatus for the Bayer process for the production of alumina as claimed in claim 1, wherein: The clamping groove (4) is matched with the filter cylinder (5), the filter cylinder (5) is arranged in the clamping groove (4), and the bottom of one side of the barrel body (1) is fixedly connected with a liquid outlet pipe (22).
4. The red mud separation apparatus for the Bayer process for the production of alumina as claimed in claim 1, wherein: The supporting rod (13) and the first stirring plate (14) are arranged on the top of the partition plate (2), and a plurality of small holes are formed in the surface of the first stirring plate (14).
5. The apparatus for separating red mud in the Bayer process for producing alumina according to claim 1, characterized in that: The centrifugal scraping mechanism comprises a second stirring plate (16) fixed around the bottom end of the rotating rod (12), a connecting plug plate (17) is arranged on one side of the second stirring plate (16), one end of the connecting plug plate (17) extends into the second stirring plate (16) and is fixedly connected with a limiting strip, and a plurality of springs (21) are arranged in the middle of the second stirring plate (16).
6. The red mud separation apparatus for the Bayer process for the production of alumina as claimed in claim 5 wherein: One end of the connecting plug plate (17) is fixedly connected with a scraping rod (18), the wall of the scraping rod (18) is matched with the wall of the filter cylinder (5), the bottom end of the scraping rod (18) is fixedly connected with a scraping strip (19), and the scraping strip (19) is matched with the top wall of the support table (3).
7. The red mud separation apparatus for the Bayer process for the production of alumina as claimed in claim 6 wherein: The top of the scraping strip (19) is fixedly connected with an arc-shaped plate (20), and the top end of the arc-shaped plate (20) is fixedly connected with the bottom wall of the second stirring plate (16).