A foamed metal activation device

Abstract

The utility model provides a kind of foamed metal activation device, including activation groove body and be located in the guide roller of activation groove body, the bottom of activation groove body is sequentially provided with gentle slope area, first slag-collecting structure, steep slope area and second slag-collecting structure along foamed metal strip advancing direction, the gradient of gentle slope area is less than the gradient of steep slope area, the upper surface of first slag-collecting structure and second slag-collecting structure is respectively provided with downward recessed residue storage groove, guide roller is set in the upper of gentle slope area, two side walls of activation groove body are respectively provided with liquid inlet and liquid outlet, liquid inlet and liquid outlet are higher than guide roller, and located in the inside of V-shaped area that foamed metal strip is wound around guide roller, the slope of gentle slope area and steep slope area is equipped with several flake that can swing under the disturbance of liquid flow or waste residue sliding down.The foamed metal activation device of the utility model, by the sectional gradient design of gentle slope area and steep slope area, realizes the automatic separation and directional collection of light and heavy waste residue using gravity.

Description

Technical Field

[0001] This utility model belongs to the field of foam metal surface treatment technology, specifically relating to a foam metal activation device. Background Technology

[0002] Currently, in continuous electroplating production lines for foamed metals, activation treatment is a key pretreatment process that affects the quality of subsequent plating layers. Existing activation tanks generally adopt a simple rectangular open-top flat-bottom structure. Driven by a traction device, the foamed metal strip continuously passes through the tank containing activation liquid to achieve chemical activation modification of its three-dimensional porous fibrous surface.

[0003] However, the existing activation tanks have significant limitations in practical applications. Since the activation solution typically contains various chemical components such as organic acids and inorganic salts, when it reacts with the foamed metal matrix under normal or heated conditions, it produces a certain amount of fine metal shavings and chemically complexed precipitates. Simultaneously, side reactions between the components of the activation solution itself also generate flocculent or powdery solid waste. Taking nickel foam as an example, when the activation solution fully soaks the nickel foam and reacts thoroughly with its rib surface, the process produces lightweight powder and nickel shavings. However, existing flat-bottomed tanks lack a specially designed online waste powder and residue treatment system. These impurities, after naturally settling to the bottom of the tank under gravity, easily accumulate and agglomerate over a large area. If an external circulation filtration device is used for forced slag removal, the effective flocculants and active components in the activation solution are easily filtered out, which can disrupt the chemical balance of the activation solution and lead to a decrease in activation efficiency. Furthermore, while forced mechanical force or high-flow-rate fluid flushing can remove some of the adhering substances, it easily damages the fragile rib structure of the foamed metal and disrupts the microscopic uniformity of its surface activation. Therefore, the above methods are difficult to apply in actual production. Furthermore, the activation tank and the overall equipment carrying the activation solution are quite heavy, and periodic shutdowns for manual tank cleaning are not only labor-intensive but also severely impact production continuity. In addition, during the activation reaction, the large specific surface area and unique pore structure of the foamed metal cause a large amount of gas to be released, forming dense, fine bubbles near the liquid surface. These bubbles easily adhere to the surface of the foamed metal ribs and inside the pores. If they are not effectively broken up and carried into subsequent electroplating processes, the rib surfaces will not be able to fully contact the plating solution, resulting in uneven plating layers, incomplete plating, and other quality defects.

[0004] Therefore, developing a device that can simultaneously solve the problems of sediment separation and collection in the activation tank and surface bubble elimination has become a technical challenge that urgently needs to be addressed in this field. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies and provide a foam metal activation device capable of online separation of light and heavy waste residues and zoned collection and discharge.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows: This utility model provides a foamed metal activation device, including an activation tank and a guide roller disposed within the activation tank for guiding the foamed metal strip in its traveling direction. The bottom of the activation tank, along the traveling direction of the foamed metal strip, is sequentially provided with a gentle slope zone, a first slag collection structure, a steep slope zone, and a second slag collection structure. The slope of the gentle slope zone is less than that of the steep slope zone. The upper surfaces of the first and second slag collection structures are respectively provided with downwardly recessed slag storage grooves. The bottom of each slag storage groove is provided with a slag discharge port, which is connected to a slag discharge pipe. A control valve is installed on the slag discharge pipe. The guide roller is positioned above the gentle slope area. The activation tank has an inlet and an outlet on its two side walls opposite to the two ends of the guide roller. Both the inlet and outlet are higher than the guide roller and located inside the V-shaped area formed by the foam metal strip as it passes around the guide roller. A filter screen is installed at the outlet. Several thin plates that can swing under the disturbance of liquid flow or waste slag sliding are provided on the slope surface of the gentle slope area and the steep slope area. The bottom edge of each thin plate is fixed to the slope surface and the top edge is suspended.

[0007] In one embodiment, four long rods are arranged sequentially on the activation tank along the traveling direction of the foamed metal strip. The four long rods are combined in pairs to form a strip inlet and a strip outlet for the foamed metal strip to enter and exit. Each long rod is provided with a plurality of defoaming sheets opposite to the surface of the foamed metal strip. The defoaming sheets are used to break the bubbles that accumulate on the surface of the foamed metal strip, and a gap is left between the defoaming sheets and the surface of the foamed metal strip.

[0008] In one embodiment, the defoaming sheets are disposed on the lower surface of the long rod or the side surface facing the foamed metal strip, with each defoaming sheet on the same long rod being evenly distributed at intervals. The defoaming sheets are arranged on the lower surface of the long rod or the side surface facing the strip, so that the sheets are directly facing the bubble accumulation area, resulting in higher efficiency in breaking bubbles. The evenly distributed defoaming sheets can fully cover the width of the strip, ensuring that bubbles across the entire width are effectively broken without any missed areas.

[0009] In one embodiment, the horizontal length of the gentle slope zone is 850-950 mm, and the slope angle is 5-10°; the horizontal length of the steep slope zone is 250-350 mm, and the slope angle is 20-30°. The longer horizontal length and shallower slope of the gentle slope zone reduce the flow velocity of the activating liquid on the slope surface, providing sufficient settling time and space for the heavy slag, ensuring effective deposition of the heavy slag into the first slag collection structure. The greater slope of the steep slope zone increases the driving force for the waste slag to slide down, causing residual sediment to slide quickly into the second slag collection structure, preventing the waste slag from remaining on the slope surface. The optimized length and slope of the gentle and steep slope zones can simultaneously consider settling efficiency and slag discharge smoothness, achieving the best static gravity slag removal effect.

[0010] In one embodiment, both the first and second slag collection structures are horizontal platforms with a length of 100-150 mm. Multiple slag storage grooves are evenly spaced along the width of the activation tank on both the first and second slag collection structures. Each slag storage groove has a width of 20-30 mm, a length of 80-90 mm, and a depth of 5-10 mm. The center-to-center distance between adjacent slag storage grooves is 90-100 mm. The horizontal platform structure allows the waste slag that slides into the slag collection area to remain stably on the platform, preventing secondary slippage or backflow caused by the slope. Simultaneously, the multiple evenly spaced slag storage grooves effectively lock the settled waste slag within the grooves, preventing it from being flowed back to the upper part of the tank by the activation liquid and thus avoiding interference with the activation reaction.

[0011] In one embodiment, the inlet and outlet both have an aperture of 50-70 mm. The inlet and outlet ensure sufficient circulation flow of the activation solution to meet the needs of continuous production for solution renewal. The outlet aperture matches the inlet aperture to ensure a stable liquid level in the tank, preventing surface fluctuations caused by flow mismatch that could affect the stable movement of the foamed metal strip and the activation effect.

[0012] In one embodiment, the diameter of the slag discharge port is 10-20 mm, and the control valve is a ball valve or a gate valve. The diameter of the slag discharge port matches the particle size of the waste residue, ensuring smooth discharge of the waste residue without causing excessive loss of the activation solution due to an excessively large orifice. Using a ball valve or gate valve to control the opening and closing of the slag discharge port is simple to operate, provides good sealing, and is corrosion-resistant, making it suitable for the long-term continuous production environment of the electroplating industry.

[0013] In one embodiment, the sheet is made of corrosion-resistant plastic, with a length of 40-50 mm, a width of 20-30 mm, a thickness of 2-3 mm, and a weight of 3-5 grams per sheet. The corrosion-resistant plastic material can be used for a long time in an activation solution environment without deformation or corrosion, has a long service life, possesses sufficient structural strength, and ensures good elastic deformation capability. It responds sensitively to minor disturbances, automatically vibrating with a moderate amplitude, effectively breaking up fine debris without causing excessive impact on the slope.

[0014] In one embodiment, the thin sheets are arranged in an array on both the gentle slope and the steep slope. The transverse center-to-center distance between two adjacent thin sheets along the width of the activation tank is 110-120 mm, and the longitudinal center-to-center distance between two adjacent thin sheets along the length of the activation tank is 70-80 mm. This array arrangement ensures that the thin sheets completely cover the entire slope area without any blind spots, guaranteeing that all fine debris deposited on the slope can be disturbed and dispersed in a timely manner.

[0015] In one embodiment, the bottom edge of each sheet is fixed to the slope along the length of the slope. When it swings, it can form a sweeping effect in the width of the slope, which will laterally disperse the fine slag deposited on the slope and prevent it from accumulating into a film in a local area of ​​the slope.

[0016] Compared with existing technologies, the foam metal activation device of this invention combines a segmented slope design with gentle and steep slope zones, utilizing gravity to achieve automatic separation and directional collection of light and heavy waste residues without the need for external power. The inlet and outlet are located inside the V-shaped area enclosed by the guide rollers and are higher than the guide rollers, allowing the activation liquid to form a directional circulation flow within the V-shaped area. This ensures the renewal of the activation liquid without disturbing the bottom settling area. The slag collection structure, together with the slag storage groove and slag discharge pipeline, can periodically discharge the deposited waste residue out of the tank, preventing the waste residue from accumulating and hardening inside the tank, ensuring the cleanliness of the activation liquid, and thus improving the quality of subsequent electroplating. Furthermore, the thin sheet can passively oscillate using the natural disturbance generated by the liquid flow or the sliding of waste residue, without the need for additional power, to disperse the fine slag deposited on the slope surface, preventing it from forming a film and ensuring smooth slag collection and discharge over a long period of time. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the continuous surface treatment and electroplating process for foamed metals. Figure 2 This is a three-dimensional structural diagram of an embodiment of a foam metal activation device according to the present invention; wherein, the dashed lines are used for perspective treatment. Figure 3 for Figure 2 The diagram shows the structure of the foam metal activation device from a top-down perspective. Figure 4 for Figure 3A schematic diagram of the cross section along the AA direction; where L1 represents the horizontal length of the gentle slope area, L2 represents the horizontal length of the first slag collection structure, L3 represents the horizontal length of the steep slope area, L4 represents the horizontal length of the second slag collection structure, α represents the angle between the slope surface of the gentle slope area and the horizontal plane, and β represents the angle between the slope surface of the steep slope area and the horizontal plane.

[0018] Explanation of reference numerals in the attached drawings: 1. Activation tank; 11. Liquid inlet; 12. Liquid outlet; 2. Guide roller; 31. Gentle slope zone; 32. First slag collection structure; 33. Steep slope zone; 34. Second slag collection structure; 35. Slag storage groove; 36. Slag discharge port; 37. Slag discharge pipe; 4. Thin sheet; 5. Long rod; 51. Strip inlet; 52. Strip outlet; 6. Defoaming sheet; 101. Unwinding; 102. Pickling; 103. Activation; 104. Electroplating; 105. Washing with clean water; 106. Drying; 107. Rewinding; 108. Foamed metal strip. Detailed Implementation

[0019] This embodiment provides a foam metal activation device, suitable for applications such as... Figure 1 The activation process of the continuous surface treatment production line for foam metal raw material rolls shown includes unwinding 101, pickling 102, activation 103, electroplating 104, water washing 105, drying 106, and rewinding 107. These processes are arranged sequentially and operate in coordination along the travel direction of the foam metal strip 108, forming a complete continuous surface treatment production line for foam metal.

[0020] In this continuous surface treatment production line, the coiled foam metal raw material is first placed on the unwinding mechanism for active unwinding, allowing the foam metal strip to unfold under constant tension and sequentially enter the subsequent processing steps. First, it passes through an acid pickling tank, where a dilute acid solution is used to clean the surface of the foam metal substrate to remove the oxide layer and oil impurities. After acid pickling, the foam metal then enters an activation tank for surface activation treatment in an activation solution, forming catalytic active centers on its rib surface. The activated foam metal then enters an electroplating tank, where a functional metal coating is deposited on its surface under the action of an applied current. After electroplating, the foam metal strip enters a clean water tank, where it is cleaned with pure water or deionized water to remove any residual chemicals from its surface. Finally, the cleaned foam metal enters a drying device for drying to remove internal and surface moisture. Finally, the finished foam metal strip, after the above continuous processing, is rewound by a winding mechanism for subsequent use or shipment.

[0021] See also Figure 2-4The foam metal activation device of this embodiment includes an activation tank 1 and a guide roller 2 disposed in the activation tank 1 to guide the foam metal strip in the direction of travel. The guide roller 2 is used to press the foam metal strip below the surface of the activation liquid. The distance between the two ends of the foam metal strip in the width direction and the inner wall of the activation tank 1 is 8-12 mm. The bottom of the activation tank 1 is provided with a gentle slope zone 31, a first slag collection structure 32, a steep slope zone 33 and a second slag collection structure 34 in sequence along the direction of travel of the foam metal strip. The slope of the gentle slope zone 31 is less than the slope of the steep slope zone 33. The upper surfaces of the first slag collection structure 32 and the second slag collection structure 34 are respectively provided with downwardly recessed slag storage grooves 35. The bottom of each slag storage groove 35 is provided with a slag discharge port 36. The slag discharge port 36 is connected to a slag discharge pipe 37. A control valve is provided on the slag discharge pipe 37. Because the impurities are relatively light in weight, they are easily affected by water flow and may experience backflow. Therefore, multiple shallow slag storage grooves 35 are set in the first slag collection structure 32 and the second slag collection structure 34. These grooves do not obstruct the main flow but can lock in the waste slag. Furthermore, a slag discharge port 36 and a slag discharge pipe 37 are designed at the bottom of the slag storage grooves 35. The slag discharge pipe 37 is controlled by a valve. The valve is closed during operation and opened when slag removal is required. The waste slag is discharged to the external waste bin by gravity and hydraulic pressure.

[0022] In this embodiment, the guide roller 2 is positioned above the gentle slope zone 31. The activation tank 1 and the two opposite sidewalls of the guide roller 2 are respectively provided with an inlet 11 and an outlet 12. Both the inlet 11 and outlet 12 are higher than the guide roller 2 and located inside the V-shaped area formed by the foamed metal strip as it passes over the guide roller 2. A filter screen is provided at the outlet 12 to prevent suspended waste from being discharged with the activation liquid, thus avoiding clogging of downstream equipment or contamination of the circulation system. Several thin plates 4 are provided on the slope surfaces of the gentle slope zone 31 and the steep slope zone 33, which can swing under the disturbance of liquid flow or waste sliding. The bottom edge of each thin plate 4 is fixed to the slope surface, while its top edge is suspended.

[0023] In this embodiment, the activation tank 1 has a length of 1400mm, a width of 500mm, and a height of 750mm. The horizontal length L1 of the gentle slope zone 31 is 900mm, and the slope angle α is 5°. The horizontal length L3 of the steep slope zone 33 is 300mm, and the slope angle β is 20°. Both the first slag collection structure 32 and the second slag collection structure 34 are horizontal platforms. The horizontal length L2 of the first slag collection structure 32 is 100mm, and the horizontal length L4 of the second slag collection structure 34 is 100mm. Multiple slag storage grooves 35 are evenly spaced along the width direction of the activation tank 1 on the first slag collection structure 32 and the second slag collection structure 34. The groove width of the slag storage groove 35 is 20mm, the groove length is 80mm, and the groove depth is 8mm. The center-to-center distance between adjacent slag storage grooves 35 is 100mm.

[0024] Since nickel foam itself has a three-dimensional porous structure, when the nickel foam strip moves continuously around the guide roller 2, it will only generate local weak disturbances, mainly in the upper layer of the activation liquid, and will not destroy the gravity zoning and settling effect of the lower layer. At the same time, the flow of activation liquid from the inlet 11 into the V-shaped area and from the outlet 12 can help impurities on the nickel foam to settle down.

[0025] When the nickel foam reaches the activation tank 1, the activation liquid fully soaks the nickel foam and reacts thoroughly with its rib surface. During activation, heavy slag such as fine nickel shavings settle quickly, gradually sinking and sliding down the slope to the first slag collection structure 32 as it flows through the gentle slope zone 31 below the guide roller 2. Lighter powders settle more slowly, being carried by the liquid flow into the steep slope zone 33, where they accelerate and slide down to the second slag collection structure 34. This separation of heavy and light slags allows for more refined residue processing. Nickel slag has a high density and settles quickly, while ultrafine powders settle slowly and are prone to caking. Separating the two types of slag prevents hard particles from continuously mixing in the activation liquid, which could easily backflow and scratch the nickel foam. Furthermore, the separate collection of fine slags reduces the risk of large-area suspension causing turbidity in the solution, effectively preventing waste slag from entering the upper reaction stage of the activation tank 1 and interfering with the activation of the nickel foam. Additionally, the separate collection of the two types of waste slag facilitates subsequent recycling and simplifies subsequent processes.

[0026] In this embodiment, the bottom of the entire tank adopts a slope design that transitions from gentle to steep. The longer gentle slope zone 31 is used to reduce the fluid flow rate, ensuring that suspended heavy slag such as nickel chips can settle sufficiently and move slowly along the slope to the first slag collection structure 32 by gravity. When the light powder travels to the shorter steep slope zone 33, the slope inclination angle increases, increasing the driving force for the light powder and other residues to slide down, causing the residual sediments of the light powder to slide quickly to the slag discharge position at the bottom of the tank and collect in the second slag collection structure 34, preventing the residues from lingering on the slope and achieving static gravity slag removal and separation of heavy and light slags. Compared with a design that only sets a single slope, this design can simultaneously meet the process requirements of low-speed settling and smooth slag sliding.

[0027] In this embodiment, the bottom slope of the activation tank 1 is a solid structure, the slope base is a solid structure, the liquid and the settled waste only flow on the upper surface of the slope, the settled material can slide continuously along the slope to the slag discharge position, there is no problem of waste leakage or siltation inside the interlayer, which is suitable for long-term continuous gravity settling operation.

[0028] The entire activation reaction generates a large amount of gas, with a large number of bubbles suspended on the top of the activation liquid. A large number of bubbles attached to the surface and pores of the foam metal strip will enter the subsequent electroplating process with the strip, resulting in missed plating or uneven plating, which affects the modification of the foam metal surface.

[0029] To address this issue, in this embodiment, four long rods 5 are sequentially arranged on the activation tank 1 along the traveling direction of the foamed metal strip. The four long rods 5 are combined in pairs to form a strip inlet 51 and a strip outlet 52 for the foamed metal strip to enter and exit. Each long rod 5 has several defoaming sheets 6 arranged opposite the surface of the foamed metal strip. The defoaming sheets 6 are used to break up bubbles accumulated on the surface of the foamed metal strip, and a gap is left between the defoaming sheets 6 and the surface of the foamed metal strip. The defoaming sheets 6 are located on the lower surface of the long rods 5, and the defoaming sheets 6 on the same long rod 5 are evenly distributed at intervals. The defoaming sheets 6 are soft sheets that can vibrate with the airflow disturbance caused by the bursting of bubbles. By setting soft defoaming sheets 6 at the strip inlet 51 and strip outlet 52, bubbles attached to the surface and pores of the foam metal strip can be broken in time, preventing bubbles from entering the subsequent electroplating process with the strip. The defoaming sheets 6 leave a gap with the strip surface and do not directly contact the strip, avoiding scratching the fragile rib structure of the foam metal and ensuring the surface quality of the product. The defoaming sheets 6 use the airflow or liquid disturbance generated by the bursting of bubbles during the movement of the strip to generate vibration, which does not require additional power, has a simple structure, and is low in cost.

[0030] In this embodiment, the inlet 11 and outlet 12 are arranged below the surface of the activation liquid, with the aperture controlled at 60 mm and the liquid flow rate controlled at 0.3 m / s. In continuous production, the activation liquid circulates in through the inlet 11 and circulates out through the outlet 12 to refresh the activation liquid.

[0031] In this embodiment, the sheet 4 is made of corrosion-resistant plastic, with a length of 50mm, a width of 25mm, a thickness of 2.5mm, and a weight of 3 grams per sheet. The sheets 4 are arranged in an array on the slopes of both the gentle slope area 31 and the steep slope area 33, with the bottom edge of each sheet 4 fixed to the slope along its length. The transverse center-to-center distance between two adjacent sheets 4 along the width of the activation tank 1 is 120mm, and the longitudinal center-to-center distance between two adjacent sheets 4 along the length of the activation tank 1 is 80mm. Because fine slag tends to accumulate and clump on the bottom wall, multiple rectangular sheets 4 are arranged in an array on the slopes of the gentle slope area 31 and the steep slope area 33. The sheets 4 are not driven by a motor; they rely on the natural water flow fluctuations or the impact of waste slag inside the activation tank 1 to achieve passive small-amplitude oscillation (the sheets 4 can shake back and forth due to the elasticity of the plastic itself), creating slight disturbances inside and dispersing the fine slag, preventing the waste slag from forming a film and clumping and flowing into the slag storage groove 35. By controlling the size and weight of the sheet 4, it can be ensured that the disturbance of the sheet 4 only affects the bottom and does not affect the activation reaction of the upper layer.

[0032] In this embodiment, the diameter of the slag discharge port 36 is 10 mm, and the control valve is a ball valve or a gate valve. During operation, impurities settle under gravity and disperse onto the surface of the first slag collection structure 32. When the slag discharge operation is performed, as the slag storage groove 35 discharges the slag-liquid mixture, the slag discharge port 36 of the slag storage groove 35 will experience a local suction effect due to the discharge of the medium, causing local micro-disturbance circulation of the liquid around the slag storage groove 35. Solid impurities that settle in the non-groove area of ​​the first slag collection structure 32 migrate towards the opening of the slag storage groove 35 due to the local suction and micro-disturbance caused by the slag discharge port 36, and then collect into the slag storage groove 35. In a static state, solid impurities only settle and spread on the surface of the first slag collection structure 32; the process of impurities collecting into the slag storage groove 35 occurs during the slag discharge operation stage, relying on the local fluid disturbance caused by the slag discharge (the same applies to the second slag collection structure 34). The design of multiple slag discharge pipes 37 allows the remaining slag discharge pipes 37 to work when one slag discharge pipe 37 fails, thus avoiding the failure of the entire sewage system.

[0033] This novel foam metal activation device utilizes a segmented slope design with gentle and steep sections to automatically separate and directionally collect light and heavy waste residues using gravity, eliminating the need for external power. The inlet and outlet are located inside and above the V-shaped area formed by the guide rollers, allowing the activation liquid to circulate directionally within the V-shaped area. This ensures liquid renewal without disturbing the bottom settling zone. The slag collection structure, combined with slag storage grooves and discharge pipes, periodically discharges deposited waste residues from the tank, preventing accumulation and caking within the tank, thus maintaining the cleanliness of the activation liquid and improving subsequent electroplating quality. Furthermore, the thin sheet can passively oscillate using the natural disturbance caused by liquid flow or waste residue sliding, breaking up fine slag deposited on the slope surface without additional power, preventing film formation and ensuring the long-term unobstructed discharge channel. In addition, by setting soft defoaming sheets at the strip inlet and strip outlet, bubbles attached to the surface and pores of the foam metal strip can be broken in time, preventing bubbles from entering the subsequent electroplating process with the strip. The defoaming sheets leave a gap with the strip surface and do not directly contact the strip, avoiding scratching the fragile rib structure of the foam metal, ensuring the surface quality of the product. No additional power is required, the structure is simple, and the cost is low.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of protection of this application is limited to these examples; within the framework of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of one or more embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0035] One or more embodiments in this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of this application. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this application should be included within the protection scope of this application.

Claims

1. A foam metal activation device, characterized in that, It includes an activation tank (1) and a guide roller (2) disposed in the activation tank (1) for guiding the direction of travel of the foam metal strip. The bottom of the activation tank (1) is provided with a gentle slope zone (31), a first slag collection structure (32), a steep slope zone (33), and a second slag collection structure (34) in sequence along the direction of travel of the foam metal strip. The slope of the gentle slope zone (31) is less than the slope of the steep slope zone (33). The upper surfaces of the first slag collection structure (32) and the second slag collection structure (34) are respectively provided with downwardly recessed slag storage grooves (35), and the bottom of each slag storage groove (35) is provided with a slag discharge port (36). The slag discharge port (36) is connected to the slag discharge pipe (37), and a control valve is provided on the slag discharge pipe (37). The guide roller (2) is positioned above the gentle slope area (31). The activation tank (1) has an inlet (11) and an outlet (12) on its two opposite sidewalls. Both the inlet (11) and outlet (12) are higher than the guide roller (2) and located inside the V-shaped area formed by the foamed metal strip as it passes over the guide roller (2). A filter screen is provided at the outlet (12). The gentle slope area (31) and the steep slope area (33) are provided with a number of thin plates (4) that can swing under the disturbance of liquid flow or waste sludge sliding. The bottom edge of each thin plate (4) is fixed to the slope surface and the top edge is suspended.

2. The foam metal activation device as described in claim 1, characterized in that, Four long rods (5) are arranged sequentially along the traveling direction of the foam metal strip on the activation tank (1). The four long rods (5) are combined in pairs to form a strip inlet (51) and a strip outlet (52) for the foam metal strip to enter and exit. Several defoaming sheets (6) are arranged on each long rod (5) relative to the surface of the foam metal strip. The defoaming sheets (6) are used to break the bubbles gathered on the surface of the foam metal strip, and a gap is left between the defoaming sheets (6) and the surface of the foam metal strip.

3. The foam metal activation device as described in claim 2, characterized in that, The defoaming sheet (6) is disposed on the lower surface of the long rod (5) or the side surface facing the foam metal strip, and the defoaming sheets (6) on the same long rod (5) are evenly distributed at intervals.

4. The foam metal activation device as described in claim 1, characterized in that, The horizontal length of the gentle slope area (31) is 850-950mm and the slope angle is 5-10°. The horizontal length of the steep slope area (33) is 250-350mm and the slope angle is 20-30°.

5. The foam metal activation device as described in claim 4, characterized in that, Both the first slag collection structure (32) and the second slag collection structure (34) are horizontal platforms with a length of 100-150mm. Multiple slag storage grooves (35) are evenly spaced along the width direction of the activation tank (1) on the first slag collection structure (32) and the second slag collection structure (34). The slag storage grooves (35) have a width of 20-30mm, a length of 80-90mm, a depth of 5-10mm, and a center-to-center distance of 90-100mm between adjacent slag storage grooves (35).

6. The foam metal activation device according to any one of claims 1-5, characterized in that, The diameter of both the inlet (11) and the outlet (12) is 50-70 mm.

7. The foam metal activation device according to any one of claims 1-5, characterized in that, The diameter of the slag discharge port (36) is 10-20mm, and the control valve is a ball valve or a gate valve.

8. The foam metal activation device according to any one of claims 1-5, characterized in that, The sheet (4) is made of corrosion-resistant plastic, with a length of 40-50mm, a width of 20-30mm, a thickness of 2-3mm, and a weight of 3-5 grams per sheet.

9. The foam metal activation device according to any one of claims 1-5, characterized in that, The thin sheets (4) are arranged in an array on the slope surfaces of the gentle slope area (31) and the steep slope area (33). The transverse center distance between two adjacent thin sheets (4) along the width direction of the activation tank (1) is 110-120 mm, and the longitudinal center distance between two adjacent thin sheets (4) along the length direction of the activation tank (1) is 70-80 mm.

10. The foam metal activation device according to any one of claims 1-5, characterized in that, The bottom edge of each of the thin sheets (4) is fixed to the slope along the length of the slope.

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