Filtering device for aluminum oxide production

Abstract

The invention provides a filtering device for aluminum oxide production, which is characterized by comprising a vibrating screen platform, a filtering screen assembly, a vibrating motor, a plurality of spring seats and a recycling box, the vibrating screen platform is erected between the mother liquor discharging pump and the causticization reaction tank so as to form a frame structure for supporting the filter screen assembly and the recycling box; the filter screen assembly is elastically connected with the vibration screen platform through a plurality of spring seats, and the vibration motor is fixedly connected with the filter screen assembly so as to drive the filter screen assembly to perform vibration screen on mother liquor; and the recycling box is fixedly arranged on one side of the vibration screening platform so as to recycle carbonate crystals filtered out by the filter screening assembly after the vibration motor is started. Resonance is formed between the vibration motor and the filter screen assembly, so that the mother liquor flowing out of the mother liquor discharging pump is subjected to multi-dimensional vibration screening to complete the recovery process of carbonate crystals, and the problem that an existing filter is likely to break down when recovering the carbonate crystals due to the change of the technological process is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of alumina production, and in particular relates to a filtering device used for alumina production. Background Art

[0002] In the field of alumina production, carbonates will continue to accumulate in the production process due to factors such as the quality of ore and lime. As the production process progresses, when the carbonate concentration reaches a certain equilibrium point, it will cause many negative effects. In terms of the production system, carbonate accumulation will affect the normal operation of the equipment. For example, in key links such as evaporation, excessive carbonate concentrations may cause scaling inside the equipment, affecting heat transfer efficiency and the service life of the equipment. From the perspective of product quality, the presence of carbonate impurities will affect key indicators such as the purity of alumina, thereby reducing the market competitiveness of the product. In terms of energy consumption, in order to maintain production after the equipment is scaled, more energy is needed to ensure the normal temperature, pressure and other conditions of the production process, resulting in a significant increase in production costs.

[0003] The current salt removal production process mainly uses evaporation to increase the concentration of the mother liquor, prompting the precipitation of carbonate crystals, and then uses a salt removal filter to remove the carbonate. After that, the discharged carbonate is redissolved and added with lime milk for causticization to convert it into caustic soda, so as to achieve the recycling of some substances and reduce the adverse effects on production.

[0004] However, during the evaporation process, scale inhibitors are added to ensure continuous operation. However, with the increasing diversity of ore varieties, new problems have arisen after adding scale inhibitors. The carbonate particles become coarse and hard under the action of scale inhibitors, and the existing salt removal filter has limitations on the size and hardness of material particles. This results in the inability of the salt removal filter to effectively process the carbonate material after the action of the scale inhibitor, resulting in a high failure rate of the salt removal system and extremely low salt removal efficiency. This seriously restricts the efficient and stable operation of the entire alumina production system. Summary of the invention

[0005] In order to solve the problem described in the background technology that carbonate particles become coarse and hard under the action of scale inhibitors, and the existing salt removal filter has limitations on the size and hardness of material particles, the present invention proposes the following technical solutions: A filtering device for alumina production, comprising: a vibrating screen platform, a filter screen assembly, a vibration motor, a plurality of spring seats and a recovery box; the vibrating screen platform is erected between a mother liquor discharge pump and a causticizing reaction tank to form a frame structure supporting the filter screen assembly and the recovery box; the filter screen assembly is elastically connected to the vibrating screen platform through a plurality of the spring seats, and the vibration motor is fixedly connected to the filter screen assembly to drive the filter screen assembly to vibrate the mother liquor; the recovery box is fixedly arranged on one side of the vibrating screen platform to recover carbonate crystals filtered out by the filter screen assembly after the vibration motor is started.

[0006] Among them, the vibrating screen platform includes: a base, multiple heightening frames, a support frame, and a wire column; the heightening frames are respectively provided on two opposite sides of the base surface, one side of each heightening frame is fixedly connected to the base, and the other side of each heightening frame is fixedly connected to one end of the spring seat; one side of the support frame is fixedly connected to the outer periphery of the mother liquor discharge pump, and the other side of the support frame is fixedly connected to the heightening frame; the wire column is fixedly connected to the base, and a cable for powering the vibration motor is passed through the wire column.

[0007] Furthermore, the filter screen assembly includes: a filter box, a filter screen, and a reinforcement frame; the outer circumferential surface of the filter box is respectively fixed to the vibration motor, the recovery box and the other end of the spring seat; the filter screen is fixed to the inner surface of the filter box, thereby dividing the filter box into an upper layer area and a lower layer area; the reinforcement frame is fixed to the inner edge of the filter box, and the reinforcement frame is located between the filter screen and the vibration motor.

[0008] Furthermore, the filter screen is arranged obliquely in the frame.

[0009] Furthermore, the side of the recovery tank away from the mother liquor discharge pump is connected to an external water source through a water supply pipe, and the side of the recovery tank away from the mother liquor discharge pump is also provided with a drain pipe connected to the causticization reaction tank to discharge the carbonate crystals filtered out by the filter screen assembly.

[0010] Furthermore, one side of the filter box close to the recovery box is raised and extends obliquely downward to form a guide plate.

[0011] Furthermore, a crossbeam for mounting the vibration motor is provided in the filter box, and the crossbeam is located on the center line of the filter box in the length direction.

[0012] Beneficial effect: The present invention forms resonance between the vibration motor and the filter screen assembly, thereby performing multi-dimensional vibration screening on the mother liquor discharged from the mother liquor discharge pump to complete the carbonate crystal recovery process, thereby solving the problem that the existing filter is prone to malfunction when recovering carbonate crystals due to changes in the process flow. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 Schematic diagram of the structure of a filtering device for aluminum oxide production according to an embodiment of the present invention. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the present application clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention. It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing this patent and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this patent.

[0015] Figure 1 Schematic diagram of the structure of a filtering device for aluminum oxide production according to an embodiment of the present invention.

[0016] Reference Figure 1 According to an embodiment of the present invention, a filtering device for alumina production includes: a vibrating screen platform 1, a filter screen assembly 2, a vibration motor 3, a plurality of spring seats 4 and a recovery box 5. The vibrating screen platform 1 is erected between the mother liquor discharge pump 6 and the causticizing reaction tank to form a frame structure supporting the filter screen assembly 2 and the recovery box 5. The filter screen assembly 2 is elastically connected to the vibrating screen platform 1 through a plurality of spring seats 4, and the filter screen assembly 2 is fixedly connected to the vibration motor 3. The recovery box 5 is fixedly arranged on one side of the filter screen assembly 2 to recover the carbonate crystals filtered out by the filter screen assembly 2 after the vibration motor 3 is started.

[0017] Specifically, the vibrating screen platform 1 includes: a base 11, a plurality of heightened frames 12, a support frame 13 and a wire column 14. The base 11 is fixedly arranged in the alumina production base by bolts and other connecting parts, and the base 11 is an annular frame structure as a whole. Among them, the extension direction of each heightened frame 12 is parallel to the length direction of the base 11, one side of each heightened frame 12 is raised at intervals and fixedly connected to the surface of the base 11, and the two ends of the other side of the heightened frame 12 are respectively fixedly connected to a spring seat 4. The support frame 13 is arranged between a pair of heightened frames 12, and the middle part of the support frame 13 is fixedly connected to the outer periphery of the outlet of the mother liquid discharge pump 6, so that the outlet of the mother liquid discharge pump 6 is suspended in the air to prevent the vibration process from affecting the operation of the mother liquid discharge pump 6. A wire cavity for passing the power supply line is provided in the wire column 14, and the outer peripheral surface of the wire column 14 is fixedly connected to the base 11, and the other end of the wire column 14 passes through the power supply line, so as to supply power to the vibration motor 3.

[0018] Specifically, the filter screen assembly 2 includes: a filter box 21, a filter screen 22 and a reinforcement frame 23. Among them, the filter box 21 is a frame structure in the shape of a box as a whole, and the filter screen 22 is fixedly arranged on the inner surface of the filter box 21, thereby dividing the cavity in the filter box 21 into an upper area and a lower area. The upper area of ​​the filter box 21 is used to cooperate with the filter screen 22 to filter out a few carbonate crystals, and the lower area of ​​the filter box 21 is used to recover the mother liquor. The vibration motor 3 is fixedly arranged on the outer peripheral surface of the upper area of ​​the filter box 21. The edge of the lower area of ​​the filter box 21 extends downwardly at an angle, thereby forming a guide plate 211 for guiding the carbonate crystals to be discharged into the recovery box 5. The surface of the filter screen 22 is provided with a plurality of fine holes for filtering out carbonate crystals, and the filtering effect of the filter screen 22 can be adjusted by selecting filter screens 22 of different mesh sizes according to production requirements. The reinforcement frame 23 is located between the vibration motor 3 and the filter screen 22 . The reinforcement frame 23 is fixedly connected to two opposite inner side surfaces of the filter box 21 , thereby enhancing the overall strength of the filter box 21 .

[0019] Preferably, in order to further improve the installation stability of the vibration motor 3, in other embodiments, the filter screen assembly 2 further includes a crossbeam 24. The crossbeam 24 is located on the center line of the length direction of the filter box 21, and the two ends of the crossbeam 24 are respectively connected to the inner side surface of the filter box 21, and a plurality of vibration motors 3 are fixedly installed on the surface of the crossbeam 24.

[0020] Furthermore, in order to improve the vibrating effect, in the present embodiment, the filter screen 22 is tilted at the bottom of the filter box 21, and the side close to the mother liquor discharge pump 6 is the low point of the filter screen 22. In order to avoid the accumulation of carbonate crystals on the surface of the filter screen 22 after vibrating, the inclination slope of the filter screen 22 is set to be smaller, and is adaptively adjusted according to the power of the vibration motor and the mesh size of the filter screen 22. During the vibrating process, after the mother liquor flows out from the mother liquor discharge pump 6, it is collected on one side by the slope of the filter screen 22 and repeatedly vibrated. During the vibration process, the filtered carbonate crystals jump forward with the vibration of the filter screen 22. After multiple vibration cycles, the carbonate crystals are discharged into the recovery box 5 along the guide plate 211.

[0021] In addition, in order to improve the discharge effect of carbonate crystals after filtration and avoid excessive carbonate crystals accumulating in the recovery box 5 and thus corroding the recovery box 5, in this embodiment, a water pipeline connected to an external water source is provided on one side of the recovery box 5 away from the discharge pump, and a drainage pipe connected to the causticizing reaction tank is provided on the other side of the recovery box 5 where the drainage pipe is installed. After the sieving is completed, the carbonate crystals filtered out by the filtration assembly 2 flow into the causticizing reaction tank along with the water.

[0022] In summary, the present invention forms resonance between the vibration motor and the filter screen assembly, thereby performing multi-dimensional vibration screening on the mother liquor flowing out of the mother liquor discharge pump to complete the carbonate crystal recovery process, thereby solving the problem that the existing filter is prone to malfunction when recovering carbonate crystals due to changes in the process flow.

[0023] The foregoing describes certain embodiments of the invention. Other embodiments are within the scope of the following claims.

[0024] The terms "exemplary," "example," and the like used throughout this specification mean "used as an example, instance, or illustration" and do not mean "preferred" or "advantageous" over other embodiments. The detailed description includes specific details for the purpose of providing an understanding of the described techniques. However, these techniques can be implemented without these specific details. In some instances, in order to avoid obscuring the concepts of the described embodiments, well-known structures and devices are shown in block diagram form.

[0025] The optional implementation modes of the embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details in the above implementation modes. Within the technical concept of the embodiments of the present invention, various simple modifications can be made to the technical solutions of the embodiments of the present invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

[0026] The above description of the contents of this specification is provided to enable any person of ordinary skill in the art to implement or use the contents of this specification. Various modifications to the contents of this specification will be apparent to those of ordinary skill in the art, and the general principles defined herein may be applied to other variations without departing from the scope of protection of the contents of this specification. Therefore, the contents of this specification are not limited to the examples and designs described herein, but are consistent with the widest range of principles and novel features disclosed herein.

Claims

1. A filtering device for alumina production, characterized in that: include: A vibrating sieve platform (1), a filter screen assembly (2), a vibration motor (3), a plurality of spring seats (4) and a recovery box (5); the vibrating sieve platform (1) is erected between a mother liquor discharge pump (6) and a causticizing reaction tank to form a frame structure supporting the filter screen assembly (2) and the recovery box (5); the filter screen assembly (2) is elastically connected to the vibrating sieve platform (1) via the plurality of spring seats (4); the vibration motor (3) is fixedly connected to the filter screen assembly (2) to drive the filter screen assembly (2) to vibrate the mother liquor; the recovery box (5) is fixedly arranged on one side of the vibrating sieve platform (1) to recover carbonate crystals filtered out by the filter screen assembly (2) after the vibration motor (3) is started.

2. A filtering device for aluminum oxide production according to claim 1, characterized in that: The vibrating screen platform (1) comprises: a base (11), a plurality of heightening frames (12), a support frame (13), and a conductor post (14); the heightening frames (12) are respectively provided on two opposite sides of the surface of the base (11); one side of each heightening frame (12) is fixedly connected to the base (11), and the other side of each heightening frame (12) is fixedly connected to one end of the spring seat (4); one side of the support frame (13) is fixedly connected to the outer periphery of the mother liquid discharge pump (6), and the other side of the support frame (13) is fixedly connected to the heightening frame (12); the conductor post (14) is fixedly connected to the base (11), and a cable for supplying power to the vibration motor (3) is passed through the conductor post (14).

3. A filtering device for aluminum oxide production according to claim 2, characterized in that: The filter screen assembly (2) comprises: a filter box (21), a filter screen (22), and a reinforcement frame (23); the outer peripheral surface of the filter box (21) is respectively fixed to the vibration motor (3), the recovery box (5), and the other end of the spring seat (4); the filter screen (22) is fixedly arranged on the inner surface of the filter box (21), thereby dividing the filter box (21) into an upper layer area and a lower layer area; the reinforcement frame (23) is fixedly arranged on the inner side edge of the filter box (21), and the reinforcement frame (23) is located between the filter screen (22) and the vibration motor (3).

4. A filtering device for aluminum oxide production according to claim 3, characterized in that: The filter screen (22) is arranged obliquely in the frame.

5. A filtering device for aluminum oxide production according to claim 3, characterized in that: The side of the recovery box (5) away from the mother liquor discharge pump (6) is connected to an external water source via a water supply pipe (51). The side of the recovery box (5) away from the mother liquor discharge pump (6) is also provided with a drainage pipe (52) connected to the causticizing reaction tank to discharge the carbonate crystals filtered out by the filter screen assembly (2).

6. A filtering device for aluminum oxide production according to claim 3, characterized in that: One side of the filter box (21) close to the recovery box (5) is raised and extends obliquely downward to form a guide plate (211).

7. A filtering device for aluminum oxide production according to claim 3, characterized in that: A crossbeam (24) for mounting the vibration motor (3) is also provided in the filter box (21); the crossbeam (24) is located on the center line of the filter box (21) in the length direction.

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