A filter press for aluminium fluoride

Abstract

The utility model discloses a kind of aluminium fluoride filter presses, including base, the base is equipped with upper filter press mechanism, and base surface is equipped with the filter tank mechanism corresponding with upper filter press mechanism;The upper filter press mechanism includes the first support fixed with base, the upper end of the first support is fixedly connected with filter pressing cylinder, the lower end of the filter pressing cylinder is fixed with filter plate;The utility model is by being arranged rotary plate and stirring rod in filter tank bottom plate, when after filter plate extruding material moves upward and separates from filter tank upper end, driving motor drives rotary plate to rotate, and then make stirring rod move in filter tank, effectively destroy the local dense layer structure formed by material, avoid a large amount of liquid stagnation in central region, improve solid-liquid separation efficiency, simultaneously, the moving mechanism that is arranged can remove filter tank mechanism from upper filter press mechanism bottom, facilitate feeding, after feeding is completed, again move back and carry out filter pressing operation.

Description

Technical Field

[0001] This utility model relates to the field of filter press technology, and specifically to an aluminum fluoride filter press. Background Technology

[0002] When an aluminum source (such as bauxite) reacts with hydrofluoric acid, it produces an aluminum fluoride solution and insoluble impurities (such as silicon compounds and unreacted solids). A filter press separates the solid residue from the solution through high-pressure filtration, ensuring the purity of the subsequently crystallized aluminum fluoride. For example, in the electrolytic aluminum slag recovery process, the material after acid leaching needs to be filtered to remove insoluble substances, retaining the clear solution containing aluminum fluoride for subsequent synthesis.

[0003] CN219600481U describes a filter press for preparing activated alumina. In use, material is fed into the rectangular frame of the lower filter plate. A servo motor drives a threaded rod to rotate, moving the lower filter plate below the upper filter plate until they are aligned. Then, the movable end of an electro-hydraulic push rod extends, causing the upper filter plate to move downwards. The cooperation of the upper and lower filter plates and the frame baffle facilitates material compression, allowing liquid to overflow through the gaps between the lower filter plate and the frame baffle, thus facilitating solid-liquid force separation. During material removal, the servo motor reverses, moving the lower filter plate away from below the upper filter plate, improving the safety of material removal and feeding, and enhancing practicality.

[0004] In existing technologies, after material is fed into the rectangular frame of the pressure filter plate, due to the lack of dynamic turning or fluidization design, solid particles, under static conditions, are preferentially deposited and gradually compacted along the edge of the filter frame and around the feed inlet when squeezed by the hydraulic pusher, forming a dense particle accumulation layer. This dense layer structure has extremely low porosity, which severely hinders the permeation path of the liquid in the central area. As a result, the filtrate can only slowly seep out through a few channels at the edge, while a large amount of liquid remains in the central area, ultimately causing uneven overall filter cake thickness and a significant decrease in separation efficiency.

[0005] Therefore, in view of the shortcomings of the existing technology, this utility model proposes an aluminum fluoride filter press. Utility Model Content

[0006] The purpose of this invention is to provide an aluminum fluoride filter press that optimizes the filter tank structure, increases the stirring function, breaks down the dense layer formed by material extrusion, and reduces residual liquid.

[0007] This utility model provides the following technical solution: an aluminum fluoride filter press, including a base, an upper filter press mechanism on the base, and a filter press tank mechanism corresponding to the upper filter press mechanism on the surface of the base; The upper filter press mechanism includes a first bracket fixed to the base, a filter press cylinder fixedly connected to the upper end of the first bracket, and a filter press plate fixed to the lower end of the filter press cylinder. The filter press mechanism includes a second bracket connected to the base at its lower end, a filter press fixed at the upper end of the second bracket, and a base plate vertically and movably connected to the lower side of the filter press via a telescopic cylinder. A rotating plate is provided on the surface of the base plate, and a vertically arranged stirring rod is fixed on the surface of the rotating plate. A drive motor for driving the rotating plate to rotate on the surface of the base plate is fixed at the bottom of the base plate. The filter press plate has a through hole corresponding to the stirring rod. When the filter press plate moves downward into the filter press tank, the upper end of the stirring rod is inserted into the through hole. When the filter press plate moves upward away from the upper end of the filter press tank, the drive motor can drive the rotating plate to rotate and drive the stirring rod to move inside the filter press tank.

[0008] Compared with the prior art, the beneficial effects of this utility model are as follows: Addressing the problem that existing filter presses, due to the lack of dynamic agitation after material input, tend to cause solid particles to preferentially deposit and compact along the edges of the filter frame and around the feed inlet, forming a dense layer that hinders liquid penetration in the central area, resulting in uneven filter cake thickness and reduced separation efficiency, this utility model addresses this issue by installing a rotating plate and a stirring rod on the bottom plate of the filter press tank. When the filter plate, after pressing the material, moves upwards and detaches from the upper end of the filter press tank, the drive motor rotates the rotating plate, causing the stirring rod to move within the filter press tank. This effectively disrupts the locally dense layer structure formed by the material, preventing a large amount of liquid from stagnating in the central area and improving solid-liquid separation efficiency. Simultaneously, the movable mechanism allows the filter press tank to be moved out from the bottom of the upper filter press mechanism for easy material loading. After loading, it can be moved back for filtration. Furthermore, the lower side of the filter press tank is connected to the bottom plate via a telescopic cylinder. After filtration, the telescopic cylinder extends, causing the bottom plate to move downwards and detach from the bottom of the filter press tank, facilitating the cleaning of solid residue. Attached Figure Description

[0009] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0010] Figure 2 This is a schematic diagram of another three-dimensional structure of the present invention.

[0011] Figure 3 This is a schematic diagram of the filter press mechanism of this utility model.

[0012] Figure 4 This is a frontal cross-sectional view of the present invention.

[0013] Figure 5 This utility model Figure 4 Enlarged structural diagram at point A in the middle. Detailed Implementation

[0014] 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.

[0015] Please see Figure 1-5 This utility model discloses an aluminum fluoride filter press, including a base 10, an upper filter press mechanism 20 on the base 10, and a filter press tank mechanism 30 corresponding to the upper filter press mechanism 20 on the surface of the base 10. The filter press tank mechanism 30 can hold the material after the aluminum source has been acid-leached, and the function of the upper filter press mechanism 20 is to perform a filter press operation on the acid-leached material to achieve the separation of solid residue and solution.

[0016] In this embodiment, the upper filter press mechanism 20 includes a first bracket 21 fixed to the base 10, a filter press cylinder 22 fixedly connected to the upper end of the first bracket 21, and a filter press plate 23 fixed to the lower end of the filter press cylinder 22.

[0017] In this embodiment, the filter press mechanism 30 includes a second bracket 31 whose lower end is connected to the base 10. The upper end of the second bracket 31 is fixed with a filter press 32. The filter press 32 is preferably a cylindrical structure. The lower side of the filter press 32 is vertically and movably connected to a bottom plate 34 through a telescopic cylinder 33. The bottom plate 34 is movably set at the bottom of the filter press 32. When the filter pressing is completed, the telescopic cylinder 33 can be extended to drive the bottom plate 34 to move downward and separate from the bottom of the filter press 32, thereby facilitating the removal of solid residues from the bottom of the tank.

[0018] Furthermore, to prevent the material in the filter press 32 from forming a locally dense layer structure when squeezed by the filter press plate 23, thus causing a large amount of liquid in the central area of ​​the material to stagnate and be unable to be discharged smoothly, a rotating plate 36 is provided on the surface of the bottom plate 34. A vertically arranged stirring rod 37 is fixed on the surface of the rotating plate 36. A drive motor 35 is fixed at the bottom of the bottom plate 34 to drive the rotating plate 36 to rotate on the surface of the bottom plate 34. After being squeezed by the filter press plate 23, the filter press cylinder 22 can be shortened, driving the filter press plate 23 to move upward and away from the filter press 32. Then, the external power supply of the drive motor 35 is turned on, and the rotation of the output shaft of the drive motor 35 drives the rotating plate 36 to rotate on the surface of the bottom plate 34. When the rotating plate 36 rotates, it drives the stirring rod 37 to rotate inside the filter press 32, thereby breaking the locally dense layer structure formed by the material inside the tank. Then, the power supply of the drive motor 35 is turned off, and the filter press cylinder 22 is extended to enter the filter press 32 for squeezing, which can effectively squeeze out the residual liquid.

[0019] In this embodiment, considering that the arrangement of the stirring rod 37 may affect the movement of the filter plate 23 in the tank, the filter plate 23 is provided with a through hole 24 corresponding to the stirring rod 37. When the filter plate 23 moves downward into the filter tank 32, the upper end of the stirring rod 37 is inserted into the through hole 24. When the filter plate 23 moves upward and leaves the upper end of the filter tank 32, the upper end of the stirring rod 37 is disengaged from the through hole 24. The drive motor 35 can drive the stirring rod 37 to move in the filter tank 32 by driving the rotating plate 36 to rotate.

[0020] Furthermore, to facilitate material loading, the surface of the base 10 is provided with a moving mechanism 40 for moving the filter press mechanism 30. With the moving mechanism 40, the filter press mechanism 30 can be moved out from the bottom of the upper filter press mechanism 20 first, the material can be added to the filter press mechanism 30, and then the filter press mechanism 30 can be moved back to the bottom of the upper filter press mechanism 20.

[0021] In some embodiments, the moving mechanism 40 includes a guide rail 41 fixedly mounted on the surface of the base 10, the lower end of the second bracket 31 being slidably connected to the guide rail 41, and a motor screw moving mechanism 42 for driving the second bracket 31 to move is provided inside the guide rail 41. The motor screw moving mechanism 42 is a common means used by those skilled in the art, and its structure will not be specifically shown or described here.

[0022] The number of telescopic cylinders 33 is at least two. The upper end of the telescopic cylinder 33 is fixedly connected to the side of the filter press 32, and the lower end of the telescopic cylinder 33 is fixedly connected to the side of the base plate 34.

[0023] like Figure 5 As shown, the surface of the base plate 34 is provided with a rotating groove, and the rotating plate 36 is rotatably disposed in the rotating groove.

[0024] like Figure 5 As shown, both the base plate 34 and the rotating plate 36 are provided with filter holes 38. During the process of being squeezed by the filter press plate 23, the filter holes 38 on the surface of the rotating plate 36 and the base plate 34 partially overlap, so that the filtrate can be discharged smoothly.

[0025] like Figure 5 As shown, the longitudinal section of the rotating plate 36 is a "mountain" shaped structure. During material feeding, the telescopic cylinder 33 extends to drive the bottom plate 34 to move downward and separate from the bottom of the filter press 32, making it easier to clean out the solid residue.

[0026] In the production of aluminum fluoride, the material after the aluminum source reacts with hydrofluoric acid enters the filter press. During filtration, the upper filter press mechanism 20 presses down, while the stirring rod 37 installed in the filter press tank 32 can rotate when the filter press plate 23 is raised. This can break down the local dense layer formed by the material due to compression, avoid liquid retention in the central area, and allow unreacted hydrofluoric acid, the by-product solution generated by the reaction, and the residual liquid such as the saturated solution containing a small amount of aluminum fluoride to be discharged more smoothly through the filter holes 38, achieving effective solid-liquid separation and improving the purity and recovery rate of aluminum fluoride products.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An aluminum fluoride filter press, characterized in that: Includes a base, on which an upper filter press mechanism is provided, and on the surface of the base is a filter press tank mechanism corresponding to the upper filter press mechanism; The upper filter press mechanism includes a first bracket fixed to the base, a filter press cylinder fixedly connected to the upper end of the first bracket, and a filter press plate fixed to the lower end of the filter press cylinder. The filter press mechanism includes a second bracket connected to the base at its lower end, a filter press fixed at the upper end of the second bracket, and a base plate vertically and movably connected to the lower side of the filter press via a telescopic cylinder. A rotating plate is provided on the surface of the base plate, and a vertically arranged stirring rod is fixed on the surface of the rotating plate. A drive motor for driving the rotating plate to rotate on the surface of the base plate is fixed at the bottom of the base plate. The filter press plate has a through hole corresponding to the stirring rod. When the filter press plate moves downward into the filter press tank, the upper end of the stirring rod is inserted into the through hole. When the filter press plate moves upward away from the upper end of the filter press tank, the drive motor can drive the rotating plate to rotate and drive the stirring rod to move inside the filter press tank.

2. The aluminum fluoride filter press as described in claim 1, characterized in that: The base surface is provided with a moving mechanism for moving the filter press tank mechanism. The moving mechanism includes a guide rail fixedly mounted on the base surface. The lower end of the second bracket is slidably connected to the guide rail. The guide rail is provided with a motor screw moving mechanism for driving the second bracket to move.

3. The aluminum fluoride filter press as described in claim 1, characterized in that: The number of telescopic cylinders is at least two. The upper end of the telescopic cylinder is fixedly connected to the side of the filter press, and the lower end of the telescopic cylinder is fixedly connected to the side of the base plate.

4. The aluminum fluoride filter press as described in claim 1, characterized in that: The surface of the base plate is provided with a rotating groove, and the rotating plate is rotatably disposed in the rotating groove.

5. The aluminum fluoride filter press as described in claim 4, characterized in that: Both the base plate and the rotating plate are perforated with filter holes.

6. The aluminum fluoride filter press as described in claim 1, characterized in that: The longitudinal section of the rotating plate has a "mountain" shaped structure.

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