A device for recovering cobalt from cobalt waste starting sheet

Abstract

The utility model relates to a screening technical field especially relates to a kind of cobalt waste starting sheet cobalt recovery equipment, including jar body, the top of jar body is equipped with cover, the centre of cover is rotatably provided with stirring paddle, the bottom of jar body is equipped with deslag valve;Cover is equipped with the drive mechanism for driving stirring paddle rotation;Jar body is double-jacket design, jar body outer wall is equipped with heat conducting oil outlet and heat conducting oil import, and respectively with jacket through-penetration, heat conducting oil outlet and heat conducting oil import are communicated with external heat conducting oil heating system;Jar body inboard bottom is equipped with dosing pipe, aeration pipe and atomizing nozzle, and jar body inner wall is equipped with ORP / pH integrated probe cabin.The utility model can effectively improve cobalt leaching rate;Add online monitoring system according to Fe 2+ Concentration fluctuation and carry out dynamic dosing;Atomizing nozzle is added with hydrogen peroxide, reduces hydrogen peroxide consumption, effectively reduces local peroxidation situation, saves cost;Bottom is prevented by air curtain and deposited, prolongs deslagging cycle, reduces employee work intensity.

Description

Technical Field

[0001] This utility model relates to the field of cobalt waste recycling technology, and in particular to a device for recycling cobalt from cobalt waste starting sheets. Background Technology

[0002] Cobalt metal, as an important strategic metal, is widely used in high-performance alloys, lithium-ion battery cathode materials, hard alloys, catalysts, and other fields. In the hydrometallurgical process for producing refined cobalt, a titanium substrate is typically used as the cathode for electrolysis or electrodeposition, depositing a thin "starter sheet" on its surface. After being peeled off, the starter sheet is used as a new cathode plate in the electrolytic cell to continue producing refined cobalt. During the production process, due to uneven current distribution, crystallization stress, physical collisions, or improper operation, a large number of waste cobalt starter sheets with irregular edges, uneven thickness, or even breakage are generated.

[0003] Currently, the industry either sells waste cobalt starter sheets at low prices as scrap or directly returns them to the electrolytic cell as anodes. The waste starter sheets are simply cleaned and then directly loaded into the anode basket and returned to the electrolysis system. While electrolysis is simple to operate, its dissolution efficiency is low and uneven: the waste starter sheets are irregular in size and shape, densely packed in the anode basket, resulting in a small contact area with the electrolyte, uneven conductivity, slow and incomplete dissolution, and impurities such as iron from the waste starter sheets entering the electrolyte during electrolysis, causing the produced electrolytic cobalt products to fail to meet quality standards.

[0004] Existing recycling technologies all have significant drawbacks: high energy consumption and costs, low metal recovery rates, complex processes, high risks of secondary pollution, and unstable product quality. Therefore, there is an urgent need in this field to develop a novel recycling equipment system specifically for processing cobalt waste cathode sheets. Utility Model Content

[0005] Based on the shortcomings of existing technologies, this patent proposes a device for recovering cobalt from cobalt waste starter sheets, which solves the problems of uneven mixing due to single stirring in traditional leaching tanks; lag in offline ORP detection; localized H2O2 over-oxidation; and frequent slag formation at the bottom of the tank, making slag removal difficult.

[0006] Specifically, it is a device for recycling cobalt from waste cobalt starting sheets, including a tank, a cover installed at the top of the tank, a stirring paddle rotatably mounted at the center of the cover, and a slag discharge valve installed at the bottom of the tank; the cover is provided with a drive mechanism for driving the stirring paddle to rotate. The tank body is designed with a double-layer jacket. The outer wall of the tank body is provided with a heat transfer oil outlet and a heat transfer oil inlet, which are connected to the jacket respectively. The heat transfer oil outlet and the heat transfer oil inlet are connected to the external heat transfer oil heating system. The tank is equipped with a dosing pipe, an aeration pipe, and an atomizing nozzle at the bottom of the tank. The dosing pipe has a dosing port and is connected to an external dosing pump through the tank via a dosing inlet. The aeration pipe is connected to an external air inlet valve through the tank via an air inlet. The atomizing nozzle is connected to an external hydrogen peroxide metering pump through the tank via a water inlet. An integrated ORP / pH probe compartment is installed on the inner wall of the tank. The integrated ORP / pH probe compartment is connected to an external controller via a wire passing through the tank. The external heat transfer oil heating system, external dosing pump, external hydrogen peroxide metering pump, and external air inlet valve are all connected to the external controller.

[0007] The advantages of adopting the above scheme are as follows: the driving mechanism drives the agitator to rotate, achieving uniform mixing of the liquid in the tank; the tank adopts a double-jacket design and uses heat transfer oil for heating, achieving uniform heating and precise temperature control; by installing an integrated ORP / pH probe chamber and dosing pipe, dynamic dosing can be performed according to the fluctuation of Fe²⁺ concentration, making the reaction more precise; by using atomizing nozzles to add hydrogen peroxide, hydrogen peroxide consumption is reduced on the one hand, and local over-oxidation is effectively reduced on the other hand, saving costs and improving quality; the bottom uses an aeration pipe to prevent sedimentation through an air curtain, extending the slag cleaning cycle and reducing the workload of employees.

[0008] Preferably, there are several atomizing nozzles connected by pipes, and they are arranged in a ring at the bottom of the inner side of the tank.

[0009] The beneficial effect of adopting the above scheme is that multiple atomizing nozzles can make hydrogen peroxide disperse more evenly and improve reaction efficiency.

[0010] Preferably, the aeration pipes are arranged in a ring at the bottom of the inner side of the tank.

[0011] The beneficial effect of adopting the above scheme is that the annular arrangement of aeration pipes can make the air curtain more evenly dispersed and effectively prevent sedimentation.

[0012] Preferably, there are several dosing ports, which are evenly arranged in a ring inside the tank.

[0013] The beneficial effect of adopting the above scheme is that multiple dosing ports allow the added FeSO4 to be dispersed more evenly, resulting in a more efficient reaction.

[0014] Preferably, the drive mechanism includes a fixed flange and a motor. The fixed flange is fixedly disposed at the center of the cover, the motor is fixed on the fixed flange, and the top of the stirring paddle is connected to the motor, which drives the stirring paddle to rotate.

[0015] Preferably, the heat transfer oil outlet is located at the top of the outer wall of the tank, and the heat transfer oil inlet is located at the bottom of the outer wall of the tank.

[0016] The beneficial effect of adopting the above scheme is that the heat transfer oil is introduced from top to bottom, which makes the temperature more uniform and the reaction more stable.

[0017] Preferably, the agitator has double-layer blades, including an upper blade and a lower blade.

[0018] The beneficial effect of adopting the above scheme is that the use of multi-stage stirring and dual-blade synergy can effectively improve the leaching rate.

[0019] Preferably, the upper blade is a radial flow turbine blade, with 4-6 blades symmetrically distributed and a blade inclination angle of 15-30°.

[0020] The beneficial effect of adopting the above scheme is that it enhances the gas-liquid mass transfer between hydrogen peroxide and Fe²⁺, resulting in more uniform mixing and a more stable reaction.

[0021] Preferably, the lower blades are axial flow blades, with 4-6 blades symmetrically distributed and a blade inclination angle of 45°.

[0022] The beneficial effects of adopting the above scheme are that it promotes solid-liquid mixing and prevents cobalt dust deposition.

[0023] Preferably, the bottom of the tank is tapered. The advantages of adopting the above solution are that it effectively prevents cobalt shavings from accumulating on the side, facilitates slag removal with the slag discharge valve, and reduces the workload of employees. Beneficial effects

[0024] Compared with the prior art, the beneficial effects of this utility model are: The tank is designed with a jacket, and the leaching temperature is controlled at 50-65℃, which ensures high leaching efficiency and avoids loss due to the volatilization of high-temperature auxiliary materials.

[0025] The multi-stage stirring and dual-blade synergy effectively improve the leaching rate.

[0026] ORP online monitoring automatically administers medication based on online monitoring data, avoiding data lag and reducing the workload of employees.

[0027] The pH is measured online, and hydrogen peroxide is added automatically based on the online detection data. Atomized nozzles are used to add hydrogen peroxide, reducing hydrogen peroxide consumption, effectively reducing localized over-oxidation, and saving costs.

[0028] The bottom uses an aeration pipe to evenly blow air, improve mass transfer efficiency, shorten leaching time, and prevent sedimentation through an air curtain, extending the slag removal cycle and reducing the workload of employees. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural schematic diagram of Embodiment 1 of the present utility model; Figure 2 This is a cross-sectional structural diagram of Embodiment 1 of the present utility model; Figure 3 This is a top view of the tank structure disclosed in Embodiment 1 of this utility model; Figure 4 This is a cross-sectional structural diagram of Embodiment 2 of the present invention; In Figures 1-4, the correspondence between the attached reference numerals is as follows: Tank body-1, heat transfer oil inlet-101, heat transfer oil outlet-102, slag discharge valve-103, cover-2, agitator-201, upper blade-2011, lower blade-2012, fixed flange-202, motor-203, dosing pipe-3, inlet-301, aeration pipe-4, air inlet-401, atomizing nozzle-5, water inlet-501, ORP / pH integrated probe compartment-6, wire-601. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0031] Furthermore, it should be understood in this utility model that the directions or positional relationships indicated by "vertical", "horizontal", "up", "down", "front", "back", "left", "right", "top", "bottom", "inner", and "outer" are based on the directions or positional relationships shown in the accompanying drawings and are only for the purpose of describing this utility model. They are not intended to indicate or imply that the device or element referred to must have this specific orientation or operate in a specific orientation, and should not be construed as a limitation of this utility model. Example

[0032] Please see Figures 1-3 This embodiment provides a device for recycling cobalt from waste cobalt starting sheets, including a tank 1, a cover 2 installed at the top of the tank 1, a stirring paddle 201 rotatably mounted at the center of the cover 2, and a slag discharge valve 103 installed at the bottom of the tank 1; the cover is provided with a drive mechanism for driving the stirring paddle 201 to rotate. The tank body 1 has a double-jacket design. The outer wall of the tank body 1 is provided with a heat transfer oil outlet 102 and a heat transfer oil inlet 101, which are respectively connected to the jacket. The heat transfer oil outlet 102 and the heat transfer oil inlet 101 are connected to the external heat transfer oil heating system to provide heat source for the tank body.

[0033] The tank 1 has a dosing pipe 3, an aeration pipe 4, and an atomizing nozzle 5 installed at the bottom inside. The dosing pipe 3 has a dosing port and is connected to an external dosing pump through the bottom of the tank 1 via a dosing inlet 301. The aeration pipe 4 is connected to an external air inlet valve through the bottom of the tank 1 via an air inlet 401. The atomizing nozzle 5 is connected to an external hydrogen peroxide metering pump through the bottom of the tank 1 via a water inlet 501.

[0034] The inner wall of the tank 1 is equipped with an ORP / pH integrated probe compartment 6. The ORP / pH integrated probe compartment 6 is embedded in the groove wall and sealed with polytetrafluoroethylene. It has a temperature resistance of ≤80℃ and is connected to an external controller through a wire 601 passing through the bottom of the tank 1.

[0035] The drive mechanism, external heat transfer oil heating system, external dosing pump, external hydrogen peroxide metering pump, and external air intake valve are all connected to an external controller to achieve automatic control.

[0036] Furthermore, there are several atomizing nozzles 5 connected by pipes. In this embodiment, eight nozzles are arranged in a ring at the bottom of the inner side of the tank body 1.

[0037] Furthermore, the aeration pipe 4 is arranged in a ring at the bottom of the inner side of the tank 1.

[0038] Furthermore, there are several dosing ports, which are evenly arranged in a ring inside the tank 1.

[0039] Furthermore, the drive mechanism includes a fixed flange 202 and a motor 203. The fixed flange 202 is fixedly disposed at the center of the cover 2, and the motor 203 is fixed on the fixed flange 202. The top of the stirring paddle 201 is connected to the motor 203, and the motor 203 drives the stirring paddle 201 to rotate.

[0040] Furthermore, the heat transfer oil outlet 102 is located at the top of the outer wall of the tank body 1, and the heat transfer oil inlet 101 is located at the bottom of the outer wall of the tank body 1.

[0041] Furthermore, the agitator 201 is provided with double-layer blades, including: upper blade 2011 and lower blade 2012.

[0042] Furthermore, the upper blade 2011 is a radial flow turbine blade with 4 blades symmetrically distributed and blade inclination angles of 15-30°.

[0043] Furthermore, the lower blades of the 2012 are axial flow blades with 4-6 blades, symmetrically distributed, and a blade inclination angle of 45°. Example

[0044] Please see Figure 2The difference between this embodiment and embodiment 1 is that the bottom of the tank 1 in this embodiment is a conical design, which effectively prevents cobalt shavings from accumulating on the side. Combined with the slag discharge valve, it facilitates slag discharge and reduces the workload of employees.

[0045] Furthermore, the inlet 301 penetrates the bottom side wall of tank 1 and is connected to an external dosing pump; the air inlet 401 penetrates the bottom side wall of tank 1 and is connected to an external air inlet valve; the water inlet 501 penetrates the bottom side wall of tank 1 and is connected to an external hydrogen peroxide metering pump; and the ORP / pH integrated probe compartment 6 is connected to an external controller via a wire 601 penetrating the bottom side wall of tank 1. Its bottom is better sealed, resulting in a better sealing effect and facilitating sludge removal.

[0046] Specifically, the working principle of this cobalt waste electrode recycling equipment is as follows: During use, raw materials are added to tank 1, the cap 2 is closed, and the stirring paddle is driven by the drive mechanism to achieve uniform mixing of the liquid inside the tank. The tank adopts a double-jacket design and uses heat transfer oil heating (temperature control 50–65℃) to achieve uniform heating and precise temperature control. Equipped with an integrated ORP / pH probe chamber and dosing pipe, dynamic dosing can be performed based on Fe²⁺ concentration fluctuations. ORP is controlled at 350–550 mV, and pH at 1.5–2.5. When ORP > 550 mV, the FeSO₄ dosing pump is started to ensure the Fe²⁺ concentration in the leachate is 50–200 ppm. When ORP < 350 mV... At a certain pH value, the hydrogen peroxide metering pump is activated to introduce hydrogen peroxide, which is also added through atomizing nozzles. This reduces hydrogen peroxide consumption and effectively minimizes localized over-oxidation, saving costs and improving quality. The leaching reaction pH is maintained at 1.5–2; stopping hydrogen peroxide addition ensures a more precise reaction. An aeration pipe at the bottom intermittently introduces nitrogen (0.1–0.3 MPa) to form an air curtain, preventing undissolved cobalt shavings from caking, extending the slag removal cycle, and reducing employee workload. This invention effectively automates the reaction, reduces manual operation frequency, improves overall leaching efficiency, and meets the high-precision requirements of cobalt recovery production, demonstrating significant practical value.

[0047] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A device for recovering cobalt from cobalt waste starter sheets, characterized in that: The tank includes a tank body (1), a cover (2) is installed at the top of the tank body (1), a stirring paddle (201) is rotatably arranged at the center of the cover (2), and a slag discharge valve (103) is installed at the bottom of the tank body (1); the cover is provided with a drive mechanism for driving the stirring paddle (201) to rotate. The tank (1) is a double-layer jacket design. The outer wall of the tank (1) is provided with a heat transfer oil outlet (102) and a heat transfer oil inlet (101), which are respectively connected to the jacket. The heat transfer oil outlet (102) and the heat transfer oil inlet (101) are connected to the external heat transfer oil heating system. The tank (1) is equipped with a dosing pipe (3), an aeration pipe (4), and an atomizing nozzle (5) at the bottom inside. The dosing pipe (3) has a dosing port and is connected to an external dosing pump through a dosing inlet (301) through the tank (1). The aeration pipe (4) is connected to an external air inlet valve through an air inlet (401) through the tank (1). The atomizing nozzle (5) is connected to an external hydrogen peroxide metering pump through a water inlet (501) through the tank (1). The inner wall of the tank (1) is equipped with an ORP / pH integrated probe compartment (6), which is connected to an external controller through a wire (601) passing through the tank (1). The drive mechanism, external heat transfer oil heating system, external dosing pump, external hydrogen peroxide metering pump, and external air intake valve are all connected to an external controller.

2. The equipment for recovering cobalt from cobalt waste starting sheets according to claim 1, characterized in that: The atomizing nozzle (5) is provided in several parts, which are connected by pipes and are arranged in a ring at the bottom of the inner side of the tank (1).

3. The equipment for recovering cobalt from cobalt waste starting sheets according to claim 1, characterized in that: The aeration pipe (4) is arranged in a ring at the bottom of the inner side of the tank (1).

4. The equipment for recovering cobalt from cobalt waste starting sheets according to claim 1, characterized in that: The dosing port is provided in several places and is evenly arranged in a ring inside the tank (1).

5. The equipment for recovering cobalt from cobalt waste starting sheets according to claim 1, characterized in that: The driving mechanism includes a fixed flange (202) and a motor (203). The fixed flange (202) is fixedly disposed at the center of the cover (2). The motor (203) is fixed on the fixed flange (202). The top of the stirring paddle (201) is connected to the motor (203). The motor (203) drives the stirring paddle (201) to rotate.

6. The equipment for recovering cobalt from cobalt waste starting sheets according to claim 1, characterized in that: The heat transfer oil outlet (102) is located at the top of the outer wall of the tank (1), and the heat transfer oil inlet (101) is located at the bottom of the outer wall of the tank (1).

7. The equipment for recovering cobalt from cobalt waste starting sheets according to claim 1, characterized in that: The stirring paddle (201) is provided with double-layer blades, including: upper blade (2011) and lower blade (2012).

8. The equipment for recovering cobalt from cobalt waste starting sheets according to claim 7, characterized in that: The upper blade (2011) is a radial flow turbine blade with 4-6 blades symmetrically distributed and blade inclination angle of 15-30°.

9. The equipment for recovering cobalt from cobalt waste starting sheets according to claim 7, characterized in that: The lower blade (2012) is an axial flow blade with 4-6 blades, symmetrically distributed, and the blade inclination angle is 45°.

10. The equipment for recovering cobalt from cobalt waste starting sheets according to claim 1, characterized in that: The bottom of the tank (1) is tapered.

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