A filter press for metal passivator production and processing

By combining the hydraulic cylinder clamping mechanism, pushing component, cleaning component and slag discharge component, the automated operation of the filter press for metal passivating agent production is realized, solving the problem of manual clamping and loosening of filter plates, and improving production efficiency and equipment stability.

CN224485084UActive Publication Date: 2026-07-14HONGZHENG (FUJIAN) CHEM CO LTD

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
HONGZHENG (FUJIAN) CHEM CO LTD
Filing Date
2025-07-31
Publication Date
2026-07-14

AI Technical Summary

Technical Problem

The pressing and loosening of filter plates in existing filter presses used for metal passivating agent production relies on manual operation, which results in cumbersome operation, low precision, high labor intensity in cleaning and waste residue treatment, and affects production efficiency and continuity.

Method used

The system employs a hydraulic cylinder clamping mechanism, a pushing component, a cleaning component, and a slag discharge component to achieve automated clamping and loosening of the filter plates. Combined with an electric lifting frame and a sprayer, the filter plates are cleaned, and the waste residue is automatically discharged via a belt conveyor, reducing manual operation.

Benefits of technology

It achieves precise fitting and loosening of filter plates, improves filtration efficiency, ensures automated treatment of filtrate and waste residue, reduces labor intensity, and enhances production continuity and equipment lifespan.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to metal passivator production technical field discloses a filter press for metal passivator production and processing, including first rack, second rack, be fixedly connected with the collecting trough between first rack, second rack, the lower surface fixed connection of collecting trough has the liquid discharge pipe, the outer surface fixed connection of first rack has the liquid inlet pipe, the inner surface of second rack is provided with the oil cylinder pressure mechanism. In the utility model, through first rack, second rack steady support, oil cylinder pressure mechanism cooperation push assembly, realize filter plate accurate adhesion and loosening, guarantee filter press seal and convenient operation, filter plate completes solid -liquid separation, filtrate orderly discharge through liquid outlet pipe, collecting trough, liquid discharge pipe, whole structure is stable, and filter press efficiency is high, and the operation convenience is strong, can satisfy metal passivator production and processing demand, prolongs equipment life.
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Description

Technical Field

[0001] This utility model relates to the field of metal passivating agent production technology, and in particular to a filter press for the production and processing of metal passivating agents. Background Technology

[0002] In the production and processing of metal passivating agents, pressure filtration is a key step in achieving solid-liquid separation of raw materials, which directly affects product purity and production efficiency.

[0003] A filter press is a device that uses pressure to separate solids and liquids. It is widely used in chemical, environmental protection, and mining industries. It separates solids and liquids by placing the suspension to be treated in a filter chamber composed of filter plates and using external pressure to force the liquid through the filter cloth or filter membrane, while the solid particles are trapped to form a filter cake.

[0004] Existing filter presses for the production of metal passivating agents can perform basic filtration operations, but the pressing and loosening of their filter plates largely rely on manual assistance or a single drive structure. This makes the operation cumbersome and inaccurate, affecting filtration efficiency. Furthermore, the cleaning of the filter plates and the treatment of waste residue after filtration are mostly done manually, which is not only labor-intensive but also prone to causing filter plate blockage and liquid-sludge mixing, reducing the subsequent filtration effect. In addition, manual cleaning is time-consuming, which seriously restricts the continuity of production. Therefore, a filter press for the production and processing of metal passivating agents is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a filter press for the production and processing of metal passivating agents, aiming to solve the problems in the prior art where cleaning and slag removal rely on manual labor, which easily leads to low filter pressing efficiency and easy clogging of filter plates, thus affecting the continuity of production.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a filter press for the production and processing of metal passivating agents, comprising a first frame and a second frame, a liquid collection tank fixedly connected between the first frame and the second frame, a drain pipe fixedly connected to the lower surface of the liquid collection tank, a liquid inlet pipe fixedly connected to the outer surface of the first frame, a hydraulic cylinder clamping mechanism provided on the inner surface of the second frame, a clamping plate fixedly connected to the telescopic end of the hydraulic cylinder clamping mechanism, a mounting base fixedly connected between the first frame and the second frame, a filter plate movably clamped on the inner side of the mounting base and located between the first frame and the clamping plate, a liquid outlet pipe installed on the outer surface of the filter plate extending to the inner side of the liquid collection tank, a cleaning component provided between the upper surfaces of the first frame and the second frame, a slag discharge component provided between the lower edges of the inner surfaces of the first frame and the second frame, and a pushing component provided between the first frame, the second frame, and the mounting base;

[0007] The pushing component includes a limiting slot and a motor. The limiting slot is formed on the surface of the mounting base. A positioning guide rod is fixedly connected inside the limiting slot. A slide is movably connected to the outside of the positioning guide rod. A clamping frame is fixedly connected to the upper surface of the slide. The outer wall of the motor is fixedly connected to the outer wall of the first frame. A lead screw is fixedly connected to the output end of the motor. An adjusting push frame is sleeved between the lead screw and the clamping frame.

[0008] As a further description of the above technical solution:

[0009] Two of each of the limiting slots and mounting seats are provided, and the two mounting seats are mirror images of each other along the central axis between the first frame and the second frame.

[0010] As a further description of the above technical solution:

[0011] The outer wall of the clamping frame is fixedly connected to the outer surface of the clamping plate. There are two clamping frames, which are mirror images of each other along the central axis of the clamping plate.

[0012] As a further description of the above technical solution:

[0013] Two motors and two lead screws are provided. The two motors and two lead screws are mirror images of each other along the central axis of the first frame, and the ends of the two lead screws away from the motors are rotatably connected to the inner wall of the second frame.

[0014] As a further description of the above technical solution:

[0015] The upper edge of the surface of the adjusting pusher is provided with a through hole for mounting a positioning guide rod with a size adaptation, and the lower edge of the surface of the adjusting pusher is provided with a screw hole for mounting a lead screw with a size adaptation. The surface of the adjusting pusher is in close contact with the handle surface of the filter plate on the side near the first frame.

[0016] As a further description of the above technical solution:

[0017] The cleaning assembly includes an electric lifting frame, with the bottom sides of the electric lifting frame fixedly connected to the upper surfaces of the first frame and the second frame, respectively, and a liquid pump fixedly connected to the upper surface of the electric lifting frame.

[0018] As a further description of the above technical solution:

[0019] One end of the liquid pump is fixedly connected to a liquid supply pipe, and the other end of the liquid pump is fixedly connected to a liquid supply branch pipe.

[0020] As a further description of the above technical solution:

[0021] The bottom end of the liquid supply branch pipe extends to the inside of the electric lifting frame and is fixedly connected to a sprayer. The bottom of the sprayer is equipped with multiple spray pipes with cleaning nozzles.

[0022] As a further description of the above technical solution:

[0023] The slag discharge assembly includes a slag discharge housing, the outer wall of which is fixedly connected between the first frame and the inner surface of the liquid collection tank, and a slag discharge port is provided on the outer side of the slag discharge housing.

[0024] As a further description of the above technical solution:

[0025] A belt conveyor is fixedly connected inside the slag discharge box, and a protective baffle is fixedly connected between the outer wall of the slag discharge box and the inner wall of the liquid collection tank.

[0026] This utility model has the following beneficial effects:

[0027] 1. In this utility model, the first frame and the second frame provide stable support, and the hydraulic cylinder pressing mechanism works in conjunction with the pushing component to achieve precise adhesion and release of the filter plate, ensuring the sealing of the filter press and convenient operation. The filter plate completes solid-liquid separation, and the filtrate is discharged in an orderly manner through the outlet pipe, the collection tank, and the drain pipe. The overall structure is stable, the filter press efficiency is high, and the operation is convenient. It can meet the needs of metal passivating agent production and processing, and extend the service life of the equipment.

[0028] 2. In this utility model, the cleaning component and the electric lifting frame drive the sprayer to move up and down precisely. The liquid pump delivers cleaning liquid, which is then used to rinse the filter plate from all directions through the nozzles to ensure the filtration effect. With the help of the slag discharge component, the waste slag falls into the slag discharge box and is discharged through the slag discharge port by the belt conveyor. The protective baffle ensures that the liquid and slag are completely separated. The two work together to achieve automatic cleaning of the filter plate and automatic discharge of waste slag, reducing manual operation and improving processing efficiency and cleanliness. Attached Figure Description

[0029] Figure 1 This utility model presents a three-dimensional schematic diagram of a filter press for the production and processing of metal passivating agents. Figure 1 ;

[0030] Figure 2 This utility model presents a three-dimensional schematic diagram of a filter press for the production and processing of metal passivating agents. Figure 2 ;

[0031] Figure 3 This is a schematic diagram of the first frame, second frame, and push assembly structure of a filter press for producing and processing metal passivating agents according to this utility model.

[0032] Figure 4 This is a schematic diagram of the cleaning component and slag discharge component of a filter press for the production and processing of metal passivating agents proposed in this utility model.

[0033] Legend:

[0034] 1. First frame; 2. Second frame; 3. Collection tank; 4. Drain pipe; 5. Inlet pipe; 6. Hydraulic cylinder clamping mechanism; 7. Clamping plate; 8. Mounting base; 9. Filter plate; 10. Outlet pipe; 11. Pushing assembly; 111. Limiting slot; 112. Positioning guide rod; 113. Slide seat; 114. Clamping frame; 115. Motor; 116. Lead screw; 117. Adjusting push frame; 12. Cleaning assembly; 121. Electric lifting frame; 122. Liquid pump; 123. Liquid supply pipe; 124. Liquid supply branch pipe; 125. Sprayer; 13. Slag discharge assembly; 131. Slag discharge machine box; 132. Slag discharge port; 133. Belt conveyor; 134. Protective baffle. Detailed Implementation

[0035] 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.

[0036] Reference Figures 1-3This utility model provides an embodiment of a filter press for the production and processing of metal passivating agents, comprising a first frame 1 and a second frame 2. The first frame 1 and the second frame 2 serve as the basic support structure of the equipment and are made of high-strength steel, capable of withstanding the enormous pressure during the filtration process and ensuring the overall stability of the equipment. A collection tank 3 is fixedly connected between the first frame 1 and the second frame 2. The collection tank 3 is used to collect the filtrate produced after filtration, and its inner wall is treated with anti-corrosion to prevent the metal passivating agent filtrate from corroding the tank body. A [missing information - likely a component or material] is fixedly connected to the lower surface of the collection tank 3. The drain pipe 4 provides a channel for filtrate discharge. Valves can be installed on the pipe to easily control the discharge speed and timing. The outer surface of the first frame 1 is fixedly connected to the inlet pipe 5, which is the entrance for the metal passivating agent raw material into the filter press. Its pipe diameter is adapted to production needs to ensure smooth material transport. The inner surface of the second frame 2 is equipped with a hydraulic cylinder clamping mechanism 6. The hydraulic cylinder clamping mechanism 6 provides strong clamping force through hydraulic power, which can make multiple filter plates 9 fit tightly together to ensure the filtration effect. The telescopic end of the hydraulic cylinder clamping mechanism 6 is fixedly connected to a clamping plate 7. A mounting base 8 is fixedly connected between the first frame 1 and the second frame 2. The mounting base 8 supports the filter plate 9 and the pushing assembly 11. Its installation position is precisely calculated to ensure that the filter plate 9 is evenly stressed after installation. The filter plate 9 is movably clamped inside the mounting base 8 and located between the first frame 1 and the pressing plate 7. The filter plate 9 is the core component of the filter press. It is equipped with filter cloth inside and can perform solid-liquid separation of metal passivating agents. The movable clamping design facilitates the disassembly and replacement of the filter plate 9. A liquid outlet pipe 10 is installed on the outer surface of the filter plate 9 extending into the inner side of the liquid collection tank 3. The liquid outlet pipe 10 passes the filter plate 9 through... The filtered liquid is introduced into the collection tank 3. The outlet pipes 10 of multiple filter plates 9 cooperate with each other to improve the filtrate collection efficiency. A pushing component 11 is provided between the first frame 1, the second frame 2 and the mounting base 8. The pushing component 11 is used to assist the movement and positioning of the filter plates 9, reduce the intensity of manual operation, and improve the convenience of installation and disassembly of the filter plates 9. The pushing component 11 includes a limiting slot 111 and a motor 115. The limiting slot 111 is opened on the surface of the mounting base 8. The limiting slot 111 provides guidance for the installation and movement of subsequent components to ensure the accuracy of the component movement trajectory.

[0037] Furthermore, two limiting slots 111 and two mounting seats 8 are provided. The two mounting seats 8 are mirror images of each other along the central axis between the first frame 1 and the second frame 2. The symmetrical arrangement of the mounting seats 8 and the limiting slots 111 can ensure that the filter plate 9 is subjected to balanced force on both sides, preventing the filter plate 9 from shifting during the filtration process. A positioning guide rod 112 is fixedly connected inside the limiting slot 111. The positioning guide rod 112 plays a positioning role in the movement of the slide 113, preventing the slide 113 from shaking or shifting during the movement. The slide 113 is movably connected to the outside of the positioning guide rod 112. The slide 113 can slide smoothly along the positioning guide rod 112. The fit clearance between the slide 113 and the positioning guide rod 112 is precision machined to reduce movement resistance. A clamping frame 114 is fixedly connected to the upper surface of the slide 113. The clamping frame 114 transmits the movement of the slide 113 to the clamping plate 7, enhancing the stability of the clamping plate 7. The outer wall of the clamping frame 114 is fixedly connected to the outer surface of the clamping plate 7. This connection method makes the clamping frame 114 and the clamping plate 7 form an integral whole, ensuring good synchronization of the clamping plate 7 during movement. There are two clamping frames 114, which are mirror images of each other along the central axis of the clamping plate 7. The double clamping frame 114 design can distribute the force on the clamping plate 7, improve structural strength, and extend the service life of the equipment. The outer wall of the motor 115 is fixedly connected to the outer wall of the first frame 1. The motor 115 serves as the power source for the pushing component 11. Fixing it to the first frame 1 can reduce vibration during operation and ensure stable power output. The output end of the motor 115 is fixed. A lead screw 116 is connected to the first frame 117, converting the rotational motion of the motor 115 into linear motion and providing power for the movement of the adjusting push frame 117. The lead screw 116 has high thread precision and good transmission efficiency. Two motors 115 and two lead screws 116 are provided, mirror-imagely arranged along the central axis of the first frame 1. This symmetrical design of the two motors 115 and two lead screws 116 ensures even force distribution on both sides of the adjusting push frame 117, resulting in smoother pushing of the filter plate 9 and preventing tilting of the filter plate 9 due to uneven force. The ends of the two lead screws 116 furthest from the motor 115 are rotatably connected to the inner wall of the second frame 2. The two ends of the lead screw 116 are connected to the first frame 1 and the second frame 2 respectively, ensuring coaxiality during rotation and reducing the impact of deflection on transmission. An adjusting pusher 117 is fitted between the clamping frame 114. Driven by a lead screw 116, the adjusting pusher 117 can move the filter plate 9, enabling the opening and closing of the filter plate 9. The upper edge of the adjusting pusher 117 surface has a through hole for mounting a positioning guide rod 112, which mates with the positioning guide rod 112 to guide the movement of the adjusting pusher 117 and prevent it from deviating. The lower edge of the adjusting pusher 117 surface has a screw hole for mounting a lead screw 116, which matches the thread of the lead screw 116. Linear movement of the adjusting pusher 117 is achieved through threaded transmission, resulting in high transmission accuracy. Furthermore, the surface of the adjusting pusher 117 is in close contact with the handle surface of the filter plate 9 near the first frame 1, ensuring that the adjusting pusher 117 can effectively push the filter plate 9.This allows the compressed filter plate 9 to loosen and separate, and the handle design of the filter plate 9 also facilitates manual adjustment of its position.

[0038] Reference Figure 1 , Figure 2 and Figure 4A cleaning component 12 is installed between the upper surfaces of the first frame 1 and the second frame 2. The cleaning component 12 is used to clean the filter plates 9 after filtration to remove residual metal passivating agent and ensure the filtration effect of the filter plates 9 for the next use. The cleaning component 12 includes an electric lifting frame 121, which can drive the sprayer 125 to move up and down to adapt to the cleaning needs of filter plates 9 of different specifications. The lifting process is smooth and the positioning is precise. The two sides of the bottom of the electric lifting frame 121 are fixedly connected to the upper surfaces of the first frame 1 and the second frame 2, respectively. This fixing method ensures that the electric lifting frame 121 is firmly installed and will not shake due to vibration during operation. A liquid pump 122 is fixedly connected to the upper surface of the electric lifting frame 121. The liquid pump 122 provides power to the cleaning fluid, delivering it to the sprayer 125. Its power can be adjusted according to cleaning requirements. One end of the liquid pump 122 is fixedly connected to a supply pipe 123, which connects to an external cleaning fluid source to provide sufficient cleaning fluid to the pump 122. The pipe body is made of high-pressure resistant material. The other end of the liquid pump 122 is fixedly connected to a supply branch pipe 124, which distributes the cleaning fluid output from the pump 122 to each spray pipe of the sprayer 125. The diameter of the branch pipe is calculated to ensure uniform fluid supply to each spray pipe. The bottom end of the supply branch pipe 124 extends to the inside of the electric lifting frame 121 and is fixedly connected to the sprayer 125. The sprayer 125 is located on the electric lifting frame 121. Inside the 21, the distance between the sprayer and the filter plate 9 can be adjusted with the lifting frame to ensure the cleaning effect. Multiple spray pipes with cleaning nozzles are installed at the bottom of the sprayer 125. These nozzles are evenly distributed to thoroughly rinse the surface of the filter plate 9. A slag discharge assembly 13 is installed between the lower edges of the inner surfaces of the first frame 1 and the second frame 2. The slag discharge assembly 13 is used to collect the waste slag produced by the filter press, achieving automatic discharge of the waste slag and reducing the workload of manual cleaning. The slag discharge assembly 13 includes a slag discharge housing 131, which provides a closed space for the conveying and temporary storage of waste slag, preventing waste slag from scattering and polluting the environment. The outer wall of the slag discharge housing 131 is fixedly connected between the inner surface of the first frame 1 and the collection tank 3. This connection enables the slag discharge machine... The casing 131 is integrated with other parts of the equipment, with a compact structure that saves space. A slag discharge port 132 is provided on the outside of the slag discharge casing 131. The slag discharge port 132 is the channel for discharging waste residue and can be connected to a waste residue collection device for convenient subsequent processing. A belt conveyor 133 is fixedly connected inside the slag discharge casing 131. The belt conveyor 133 can transport the waste residue from inside the casing to the slag discharge port 132 with high conveying efficiency. The belt is made of wear-resistant material and has a long service life. A protective baffle 134 is fixedly connected between the outer wall of the slag discharge casing 131 and the inner wall of the liquid collection tank 3. The protective baffle 134 can prevent the filtrate in the liquid collection tank 3 from flowing into the slag discharge casing 131 and at the same time prevent waste residue from entering the liquid collection tank 3, ensuring thorough separation of liquid and residue.

[0039] Working principle: During operation, the metal passivating agent raw material enters the filter chamber formed by multiple filter plates 9 through the inlet pipe 5. At this time, the hydraulic cylinder pressing mechanism 6 drives the pressing plate 7 to move. With the assistance of the pushing component 11, all the filter plates 9 are tightly fitted to form a sealed space. The raw material achieves solid-liquid separation under pressure. The filtrate flows into the collection tank 3 through the outlet pipe 10 of the filter plate 9, and then is discharged and collected through the drain pipe 4. After the filtration is completed, the hydraulic cylinder pressing mechanism 6 drives the pressing plate 7 to retract. At the same time, the motor 115 drives the lead screw 116 to rotate, causing the adjusting pusher 117 to push the filter plate 9 to loosen and separate. The waste residue on the filter plate 9 falls into the drain. Inside the slag discharge box 131 of the slag assembly 13, the slag is conveyed by the belt conveyor 133 through the slag discharge port 132 to the external collection device. Then the cleaning assembly 12 starts to work. The electric lifting frame 121 drives the sprayer 125 to move to a suitable height. The liquid pump 122 delivers the cleaning liquid to the sprayer 125 through the liquid supply pipe 123 and the liquid supply branch pipe 124. The filter plate 9 is thoroughly cleaned through the nozzles on the spray pipe. The waste liquid after cleaning flows into the collection tank 3 and is discharged. The protective baffle 134 ensures that the liquid and slag are completely separated during the process. The whole process realizes the automated operation of metal passivating agent pressure filtration, liquid discharge, slag discharge and filter plate 9 cleaning.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A filter press for producing and processing metal passivating agents, comprising a first frame (1) and a second frame (2), characterized in that: A liquid collection tank (3) is fixedly connected between the first frame (1) and the second frame (2). A drain pipe (4) is fixedly connected to the lower surface of the liquid collection tank (3). An inlet pipe (5) is fixedly connected to the outer surface of the first frame (1). A hydraulic cylinder clamping mechanism (6) is provided on the inner surface of the second frame (2). A clamping plate (7) is fixedly connected to the telescopic end of the hydraulic cylinder clamping mechanism (6). A mounting base (8) is fixedly connected between the first frame (1) and the second frame (2). A filter plate (9) is movably mounted on the inner side and between the first frame (1) and the clamping plate (7). The outer surface of the filter plate (9) extends to the inner side of the liquid collection tank (3) and a liquid outlet pipe (10) is installed. A cleaning component (12) is provided between the upper surfaces of the first frame (1) and the second frame (2). A slag discharge component (13) is provided between the lower edges of the inner surfaces of the first frame (1) and the second frame (2). A pushing component (11) is provided between the first frame (1), the second frame (2) and the mounting base (8). The pushing component (11) includes a limiting slot (111) and a motor (115). The limiting slot (111) is opened on the surface of the mounting base (8). A positioning guide rod (112) is fixedly connected inside the limiting slot (111). A slide (113) is movably connected to the outside of the positioning guide rod (112). A clamping frame (114) is fixedly connected to the upper surface of the slide (113). The outer wall of the motor (115) is fixedly connected to the outer wall of the first frame (1). A lead screw (116) is fixedly connected to the output end of the motor (115). An adjusting push frame (117) is sleeved between the lead screw (116) and the clamping frame (114). The cleaning assembly (12) includes an electric lifting frame (121). The bottom sides of the electric lifting frame (121) are fixedly connected to the upper surfaces of the first frame (1) and the second frame (2), respectively. A liquid pump (122) is fixedly connected to the upper surface of the electric lifting frame (121). A liquid supply pipe (123) is fixedly connected to one end of the liquid pump (122), and a liquid supply branch pipe (124) is fixedly connected to the other end of the liquid pump (122). The bottom end of the liquid supply branch pipe (124) extends to the inside of the electric lifting frame (121) and is fixedly connected to a sprayer (125). A plurality of spray pipes with cleaning nozzles are installed at the bottom of the sprayer (125).

2. A filter press for producing and processing metal passivating agents according to claim 1, characterized in that: The limiting slot (111) and the mounting base (8) are provided in twos, and the two mounting bases (8) are mirrored along the central axis between the first frame (1) and the second frame (2).

3. A filter press for producing and processing metal passivating agents according to claim 1, characterized in that: The outer wall of the clamping frame (114) is fixedly connected to the outer surface of the clamping plate (7). There are two clamping frames (114), and the two clamping frames (114) are mirrored along the central axis of the clamping plate (7).

4. A filter press for producing and processing metal passivating agents according to claim 1, characterized in that: Two motors (115) and two lead screws (116) are provided. The two motors (115) and two lead screws (116) are mirror images of the central axis of the first frame (1), and the ends of the two lead screws (116) away from the motors (115) are rotatably connected to the inner wall of the second frame (2).

5. A filter press for producing and processing metal passivating agents according to claim 1, characterized in that: The upper edge of the surface of the adjusting pusher (117) is provided with a through hole for mounting a size-adaptive positioning guide rod (112), and the lower edge of the surface of the adjusting pusher (117) is provided with a screw hole for mounting a size-adaptive lead screw (116). The surface of the adjusting pusher (117) is in close contact with the handle surface of the filter plate (9) on the side near the first frame (1).

6. A filter press for producing and processing metal passivating agents according to claim 1, characterized in that: The slag discharge assembly (13) includes a slag discharge housing (131), the outer wall of which is fixedly connected between the first frame (1) and the inner surface of the liquid collection tank (3), and a slag discharge port (132) is provided on the outer side of the slag discharge housing (131).

7. A filter press for producing and processing metal passivating agents according to claim 6, characterized in that: A belt conveyor (133) is fixedly connected inside the slag discharge box (131), and a protective baffle (134) is fixedly connected between the outer wall of the slag discharge box (131) and the inner wall of the liquid collection tank (3).