A metal dissolving device

Abstract

The utility model discloses a kind of metal dissolving devices, including oxidizer, aeration device and etching tower;The top of the oxidizer is provided with gas outlet, and the bottom end two sides are provided with oxidizing liquid outlet and oxidizing liquid backflow port;Spray pipe is installed at the top of etching tower, support filter is installed in cavity, air inlet is opened in the lower side wall of support filter, and drain outlet is opened in the bottom center;The gas outlet of oxidizer is connected with the air inlet of etching tower, the oxidizing liquid outlet is connected with the spray pipe of etching tower by pipeline with spray pump, the oxidizing liquid backflow port is connected with the drain outlet of etching tower, liquid phase in etching tower falls from top to bottom, and gas phase flows reversely from bottom to top.The utility model uses oxygen in air as oxidizing agent to etch and dissolve metal, and makes dissolving liquid containing dissolved oxygen fall from top to bottom in etching tower, air flows from bottom to top in etching tower, and the two move reversely, improve the utilization rate of oxygen in air, and speed up the etching and dissolving speed of metal.

Description

Technical Field

[0001] This utility model relates to the field of hydrometallurgical equipment technology, and in particular to a gas-liquid countercurrent metal dissolution device using air as an oxidant. Background Technology

[0002] Currently, there are two methods for chemically dissolving metals: immersion etching and spray etching. To accelerate the dissolution process, the industry often adds oxidizing agents to the solution, such as hydrogen peroxide, sodium chlorate, and strong oxidizing acids.

[0003] However, this method of dissolving metals by adding oxidants leads to the following drawbacks:

[0004] 1. Additives introduce impurities such as chloride ions and sodium ions, resulting in a complex composition of the metal ion solution. This makes it difficult to remove impurities during the subsequent manufacturing of chemical metal products, increasing the cost of impurity removal by more than 50%.

[0005] 2. Oxidizing agents are generally explosive. Strong oxidizing agents pose an explosion hazard during storage and use (e.g., the explosion limit of hydrogen peroxide decomposition is >25%), resulting in high safety risks. Utility Model Content

[0006] This invention provides a metal dissolution device that solves the problems of high difficulty in removing metal ions and high safety risks caused by adding oxidants to increase the metal dissolution rate in the prior art.

[0007] To solve the above-mentioned technical problems, this utility model provides a metal dissolution device, including: an oxidizer and a etching tower;

[0008] The oxidizer is provided with an air outlet at the top and an oxidation liquid outlet and an oxidation liquid return outlet on both sides of its bottom; the oxidizer is also provided with an aeration device;

[0009] The top of the etching tower is equipped with a spray pipe and an exhaust port, its inner cavity is equipped with a support filter, its side wall is equipped with an air inlet located below the support filter, and its bottom is equipped with a liquid outlet.

[0010] The oxidant outlet is connected to the spray pipe of the etch tower via a pipe equipped with a spray pump; the oxidant outlet is connected to the etch tower inlet via a pipe; and the etch tower outlet is connected to the oxidant return outlet via a pipe.

[0011] The liquid phase in the etching tower flows downward through the spray pipe, while the gas phase flows upward through the air inlet, with the two phases contacting each other in opposite directions.

[0012] In a preferred embodiment of the present invention, the aeration device includes an aeration rod head and an aeration blower;

[0013] The aeration rod head is placed horizontally at the bottom of the inner cavity of the oxidizer and immersed in the dissolving liquid, and the aeration rod head is provided with micropores;

[0014] The aeration blower is located outside the oxidizer, and its outlet is connected to the aeration bar head through a pipe.

[0015] In a preferred embodiment of the present invention, the supporting filter element includes a double-layer filter plate and at least one layer of filter screen; the filter screen is sandwiched between the double-layer filter plates.

[0016] In a preferred embodiment of this utility model, the top and body of the etching tower are separate structures, and the bottom diameter of the top is larger than the top diameter of the body.

[0017] In a preferred embodiment of this utility model, a water trough is provided around the top outer periphery of the tower body. The water trough is used to hold sealing liquid, and the bottom end of the tower top is inserted below the liquid surface of the water trough to form a liquid seal.

[0018] In a preferred embodiment of the present invention, the device further includes a cooling absorber, the air inlet of which is connected to the exhaust port at the top of the corrosion tower via a pipe, and the condensate outlet of which is connected to the oxidant return port of the oxidizer via a pipe.

[0019] In a preferred embodiment of the present invention, the device further includes a program controller and a metal ion concentration detector;

[0020] The metal ion concentration detector is located inside the oxidizer and is used to detect the concentration of metal ions in the solution.

[0021] The program controller is connected to the metal ion concentration detector and controls the start and stop of the aeration blower and spray pump according to the detected concentration.

[0022] The beneficial effects of this utility model are as follows: This utility model provides a metal dissolving device. Through the connection design of the oxidizer and the etching tower, as well as the design of the aeration pump, the spray head inside the etching tower, and the supporting filter, it achieves the dissolution of metal using oxygen in the air as an oxidant. The dissolved solution containing dissolved oxygen falls from top to bottom inside the etching tower, while the air flows from bottom to top inside the etching tower. The two move in opposite directions, increasing the contact time and amount between the metal to be dissolved and the oxygen, effectively improving the utilization rate of oxygen in the air, and accelerating the metal dissolution rate. Using this utility model to dissolve metal is safe, environmentally friendly, and highly practical. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a preferred embodiment of a metal dissolving device according to the present invention;

[0024] The components in the attached diagram are labeled as follows:

[0025] 10. Oxidizer, 11. Gas outlet, 12. Raw liquid inlet, 13. Aeration pipe inlet, 14. Oxidized liquid outlet, 15. Oxidized liquid reflux inlet;

[0026] 21. Aeration blower; 22. Aeration rod head;

[0027] 30. Algorithm tower; 31. Spray pipe; 32. Filter support; 33. Air inlet; 34. Liquid outlet; 35. Water tank; 36. Exhaust outlet.

[0028] 40. Cooling absorber; 50. Spray pump. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0030] The embodiments of this utility model include:

[0031] Example 1

[0032] like Figure 1 As shown, this utility model discloses a metal dissolution device that uses air as an oxidant and employs countercurrent gas-liquid flow to dissolve metal. Specifically, it includes an oxidizer 10 and a dissolution tower 30.

[0033] Specifically, the oxidizer 10 is a horizontal tank-shaped structure containing a solution of tap water, without the addition of oxidant, thus improving safety. The top of the oxidizer 10 has an air outlet 11, a raw liquid inlet 12, and an aeration pipe 13; the bottom of its two end caps have an oxidant liquid outlet 14 and an oxidant liquid return port 15, respectively.

[0034] An aeration fan 21 is provided on the outside of the oxidizer 10, and an aeration rod head 22 is provided at the bottom of the inner cavity of the oxidizer 10, with the aeration rod head immersed in the dissolving liquid inside the oxidizer 10. Specifically, the aeration rod head 22 is a microporous aeration rod head with multiple micropores. The air outlet of the aeration fan 21 is connected to the aeration rod head 22 through a pipe passing through the aeration pipe port 13 on the oxidizer 10, thereby aerating the dissolving liquid through the aeration rod head 22, making the dissolving liquid oxygen-laden, and improving the corrosion dissolution effect on the metal.

[0035] The top of the etching tower 30 is equipped with an exhaust port 36 and a spray pipe 31. The bottom end of the spray pipe 31 is a shower head structure that extends into the inner cavity of the etching tower 10, thereby increasing the spraying area.

[0036] The bottom of the inner cavity of the etching tower 30 is supported by a support rod to install a filter element 32. The metal to be dissolved is placed on the filter element 32. Specifically, the filter element 32 consists of a double-layer filter plate and two layers of filter screen; the filter screen is sandwiched between the double-layer filter plates. The etching tower 30 also has an air inlet 33 located below the filter element 32, and a drain outlet 34 is located at the center of its bottom.

[0037] The outlet 11 of the oxidizer 10 is connected to the inlet 33 of the etching tower 30 through a pipe, so that air flows from bottom to top inside the etching tower 30.

[0038] The oxidant outlet 14 of the oxidizer 10 is connected to the spray pipe 31 at the top of the etching tower 30 via a pipe equipped with a spray pump 50, thereby allowing the dissolved liquid containing dissolved oxygen to flow from top to bottom within the etching tower 30. In this way, the gas and liquid phases flow counter-currently within the etching tower 30, improving the utilization rate of oxygen in the air and accelerating the metal etching efficiency.

[0039] The oxidizing liquid return port 15 of the oxidizer 10 is connected to the drain port 34 of the etching tower 30 via a pipe. After the dissolving liquid dripping from the etching tower 30 dissolves the metal, it is filtered by the support filter 32, collected at the bottom of the tower, and finally returned to the oxidizer 10 through the drain port 34, thus achieving recycling.

[0040] Specifically, the design of the aforementioned support filter element 32 serves two purposes: firstly, to support the metal to be dissolved, and secondly, to filter the dissolved liquid after the metal is etched and to distribute air evenly within the tower.

[0041] Specifically, the top and body of the etching tower 30 are separate structures, and the bottom diameter of the top is larger than the top diameter of the body. Specifically, a water trough 35 is provided around the outer periphery of the top of the body, which holds a sealing liquid. The bottom of the top is inserted below the liquid surface in the water trough 35, forming a liquid seal. This prevents gas from escaping from the tower and facilitates the opening of the lid to add the metal to be dissolved.

[0042] Example 2

[0043] The difference from Embodiment 1 is that the metal dissolving device further includes a cooling absorber 40.

[0044] Specifically, the air inlet of the cooling absorber 40 is connected to the exhaust port 36 of the corrosion tower 30 through a pipe, so that the air in the corrosion tower 30 and the gas released during the metal dissolution process enter the cooling absorber 40 for further treatment, preventing them from directly entering the air and polluting the environment.

[0045] The condensate outlet of the cooling absorber 40 is connected to the oxidant return port 15 of the oxidizer 10 via a pipe to reduce waste liquid discharge.

[0046] Example 3

[0047] The difference from Embodiment 1 or 2 is that the metal dissolution device further includes a program controller and a metal ion concentration detector.

[0048] Specifically, the metal ion concentration detector is located inside the oxidizer 10 and is used to detect the concentration of metal ions in the solution.

[0049] The program controller is connected to the metal ion concentration detector. The target metal ion concentration signal detected by the metal ion concentration detector is transmitted to the program controller, which then compares it with pre-stored information to control the start and stop of the aeration fan 21 and the spray pump 50.

[0050] Specifically, when the concentration of metal ions in the solution reaches a preset concentration, i.e., a saturation concentration, the program controller sends a signal to shut down the aeration blower 21 and the spray pump 50, thus stopping the operation.

[0051] This utility model's metal dissolution device, in its connection relationship between the oxidizer and the etching tower, as well as the design of the aeration pump, the spray head inside the etching tower, and the supporting filter, uses oxygen in the air as an oxidant to dissolve the metal. The dissolved solution containing dissolved oxygen falls from top to bottom inside the etching tower, while the air flows from bottom to top inside the etching tower. The two move in opposite directions, increasing the contact time and amount between the metal to be dissolved and the oxygen, making the utilization rate of oxygen in the air reach more than 90%, accelerating the metal dissolution rate, and is safe, environmentally friendly, and highly practical.

[0052] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A metal dissolving apparatus, characterized in that, include: Oxidizer and solvent extraction tower; The oxidizer is provided with an air outlet at the top and an oxidation liquid outlet and an oxidation liquid return outlet on both sides of its bottom; the oxidizer is also provided with an aeration device; The top of the etching tower is equipped with a spray pipe and an exhaust port, its inner cavity is equipped with a support filter, its side wall is equipped with an air inlet located below the support filter, and its bottom is equipped with a liquid outlet. The oxidant outlet is connected to the spray pipe of the etch tower via a pipe equipped with a spray pump; the oxidant outlet is connected to the etch tower inlet via a pipe; and the etch tower outlet is connected to the oxidant return outlet via a pipe. The liquid phase in the etching tower flows downward through the spray pipe, while the gas phase flows upward through the air inlet, with the two phases contacting each other in opposite directions.

2. The apparatus according to claim 1, characterized in that, The aeration device includes aeration rods and an aeration fan; The aeration rod head is placed horizontally at the bottom of the inner cavity of the oxidizer and immersed in the dissolving liquid, and the aeration rod head is provided with micropores; The aeration blower is located outside the oxidizer, and its outlet is connected to the aeration bar head through a pipe.

3. The apparatus according to claim 2, characterized in that, The supporting filter element includes a double-layer filter plate and at least one layer of filter screen; the filter screen is sandwiched between the double-layer filter plates.

4. The apparatus according to claim 3, characterized in that, The top and body of the etching tower are separate structures, with the bottom diameter of the top being larger than the top diameter of the body.

5. The apparatus according to claim 4, characterized in that, A water trough is provided around the top of the tower body. The water trough is used to hold sealing liquid. The bottom of the tower top is inserted below the liquid surface of the water trough to form a liquid seal.

6. The apparatus according to claim 2, characterized in that, The device also includes a cooling absorber, the air inlet of which is connected to the exhaust port at the top of the corrosion tower via a pipe, and the condensate outlet of which is connected to the oxidant return port of the oxidizer via a pipe.

7. The apparatus according to any one of claims 2-6, characterized in that, The device also includes a programmable controller and a metal ion concentration detector; The metal ion concentration detector is located inside the oxidizer and is used to detect the concentration of metal ions in the solution. The program controller is connected to the metal ion concentration detector and controls the start and stop of the aeration blower and spray pump according to the detected concentration.

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