Slurry electromagnetic iron removal system for ternary precursor purification

Abstract

The utility model discloses a slurry electromagnetic deironing system for ternary precursor purification, which comprises an electromagnetic component, a valve component, a control unit, a raw material storage tank, a purified material storage tank and a magnetic foreign matter collecting component, the electromagnetic component comprises a shell, and the control unit is respectively in signal connection with the valve component and the electromagnetic component. The raw material storage tank is connected to the feeding port and the material returning port through the valve assemblies, and the purified material storage tank and the magnetic foreign matter collecting assembly are connected to the discharging port and the slag discharging port through the valve assemblies correspondingly. The compressed air source and the flushing fluid source are connected to the air inlet through the valve assembly, and the liquid inlet purges non-magnetic materials into the raw material storage tank and flushes magnetic foreign matter to the magnetic foreign matter collecting assembly from top to bottom under the assistance of gravity. According to the utility model, a compressed air source is injected from the air inlet in the upper part of the shell and purges from top to bottom under the assistance of gravity, so that non-magnetic slurry and part of magnetic foreign matters are respectively returned to the raw material storage tank and the magnetic foreign matter collecting component.

Description

Technical Field

[0001] This utility model relates to the technical field of electromagnetic iron removal systems for slurries, and in particular to an electromagnetic iron removal system for slurry purification of ternary precursors. Background Technology

[0002] With the rapid development of new energy vehicles, energy storage systems and other fields, the requirements for lithium battery performance are constantly increasing. As a key intermediate material for lithium battery cathode materials, the chemical properties of the precursor directly affect the performance of the final battery material, and thus affect the energy density, cycle life and safety of the battery. Therefore, it is necessary to strictly control the impurity content in the precursor, including magnetic impurities, to ensure the quality of the precursor.

[0003] Electromagnetic iron separators generate strong magnetic fields through electromagnetic induction. Compared with traditional permanent magnet iron separators, they have higher magnetic field strength, more uniform distribution, and greater gradient, resulting in more significant iron removal. They can effectively remove tiny magnetic impurities from precursor slurries and improve the purity of precursors. However, in existing electromagnetic iron separators used for ternary precursor purification, non-magnetic slurries inside the electromagnetic component housing and pipes are not recycled, and the magnetic component housing is only rinsed with rinsing fluid. The degree of magnetic foreign matter removal needs to be improved. Summary of the Invention

[0004] This application provides an electromagnetic iron removal system for slurry purification of ternary precursors. Compressed air is injected through the air inlet at the top of the housing and, with gravity assistance, blows down the connections between components and inside the housing. Non-magnetic slurry is returned to the raw material storage tank, and any magnetic foreign matter that was not removed is sent to the magnetic foreign matter collection assembly.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an electromagnetic iron removal system for slurry purification of ternary precursors, comprising...

[0006] An electromagnetic component, which uses the current and voltage parameters of a slurry electromagnetic iron remover to attract magnetic foreign objects, includes a housing.

[0007] Valve assemblies are used to control the on / off states between various components in a system.

[0008] The control unit is connected to the valve assembly and the solenoid assembly respectively to control the opening and closing sequence of the valve assembly and change the current and voltage parameters of the solenoid assembly.

[0009] The raw material storage tank is connected to the inlet and outlet located below the shell via a conveying pump and valve assembly.

[0010] The purified material storage tank is connected to the discharge port located on the top of the shell via a valve assembly;

[0011] A magnetic foreign matter collection component is connected to a slag discharge port located at the bottom of the housing via a valve assembly;

[0012] The compressed air source and flushing fluid source located at the top of the housing are connected to the air inlet and liquid inlet located at the top of the housing through valve assembly. With the assistance of gravity, the non-magnetic materials in the housing and the communication between the components are blown from top to bottom into the raw material storage tank, and the magnetic foreign objects in the housing are flushed into the magnetic foreign object collection assembly.

[0013] Compared with the prior art, the advantages of this utility model are:

[0014] Compressed air is injected through the air inlet at the top of the housing. With the assistance of gravity, it blows from top to bottom through the connection points between the components and inside the electromagnetic assembly housing, returning the non-magnetic slurry to the raw material storage tank, thereby improving the material recovery rate. At the same time, the slurry delivery pump provides pressure, causing the slurry to flow against gravity, increasing the probability of contact between magnetic foreign objects and the medium, while avoiding sedimentation and blockage.

[0015] By adjusting the current and voltage parameters of the electromagnetic components through the control unit, the magnetic field strength and gradient distribution can be flexibly adjusted, allowing magnetic foreign objects to be efficiently adsorbed onto the surface of the magnetic medium, ensuring the high purity of the precursor material, thereby directly improving the energy density and cycle life of the lithium battery. Due to the gradient magnetic field layout inside the casing, combined with the upward flow direction of the slurry, the residence time of magnetic foreign objects in the strong magnetic field area is extended, preventing the escape of small particles. At the same time, the control unit automatically switches between adsorption, blowing, and rinsing stages, requiring no manual intervention throughout the cleaning process, thus improving work efficiency.

[0016] As an improvement, a vertical feed channel is provided between the raw material storage tank and the shell, and a horizontal return pipe is provided between the raw material storage tank and the shell. A horizontal slag discharge channel is provided between the magnetic foreign matter collection component and the shell. The return pipe and the slag discharge channel are respectively located on both sides of the feed channel and connected to the feed channel. The raw material enters the shell through the feed channel, the impurities are discharged through the slag discharge channel, and the circulating material returns through the return pipe, forming a closed-loop system.

[0017] As an improvement, a discharge channel is horizontally arranged between the purified material storage tank and the shell, a flushing channel is horizontally arranged between the flushing liquid source and the shell, and a gas input channel is vertically arranged between the compressed air source and the shell. The discharge channel and the gas input channel are arranged on both sides of the flushing channel and connected to the flushing channel. The vertical gas input channel provides compressed air to blow non-magnetic materials into the raw material storage tank with the assistance of gravity.

[0018] As an improvement, a flow channel is provided at the center of the shell. The feed channel is connected to the rinsing channel through the flow channel. As the core hub for material transfer, it ensures that the raw materials enter the subsequent processing unit quickly and evenly from the feed channel, reducing dead zones and improving mixing efficiency.

[0019] As an improvement, the valve assembly includes a first valve located at the feed inlet of the feed channel, a second valve located at the slag discharge outlet of the slag discharge channel, a third valve located at the return outlet of the return channel, a fourth valve located at the discharge outlet of the discharge channel, a fifth valve located at the liquid inlet of the flushing channel, and a sixth valve located at the air inlet of the gas input channel. The valves are controlled by a control unit to realize an automated process of "feeding → purification → return → slag discharge → flushing → discharge".

[0020] As an improvement, the electromagnetic component also includes several electromagnetic coils arranged inside the housing around the flow channel to generate a gradient magnetic field, and several magnetic foreign matter adsorption media arranged in the flow channel corresponding to the electromagnetic coils. The shape of the magnetic foreign matter adsorption media is adapted to the inner wall of the flow channel. The gradient magnetic field strength forms a "magnetic trap" in the flow channel. Magnetic foreign matter is continuously adsorbed during the flow process. At the same time, the shape of the adsorption media is perfectly matched with the inner wall of the flow channel, eliminating dead zones in the flow and preventing magnetic foreign matter from escaping.

[0021] As an improvement, the magnetic foreign matter adsorption medium consists of several strip-shaped media arranged radially outward from the center, a first annular medium, a second annular medium, and a third annular medium connecting the strip-shaped media. The diameter of the second annular medium is smaller than that of the third annular medium but larger than that of the first annular medium. The strip-shaped media radiate outward from the center to form a high-density magnetic field region, which quickly captures magnetic impurities passing through the center of the flow channel. At the same time, the diameters of the first, second, and third annular media increase in that order, forming a magnetic field gradient of "sparse on the outside and dense on the inside", ensuring that large particles of impurities are preferentially adsorbed by the inner layer, while small particles are gradually captured by the outer layer.

[0022] As an improvement, the magnetic foreign object adsorption medium is a mesh medium, which provides a large number of contact points and significantly enhances the ability to capture magnetic foreign objects. Attached Figure Description

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] Figure 1 An exploded view of the structure of an electromagnetic iron removal system for slurry used in the purification of ternary precursors;

[0025] Figure 2 This is a schematic diagram of the electromagnetic component structure;

[0026] Figure 3 A schematic diagram of a structure for adsorbing magnetic foreign matter;

[0027] Figure 4 This is a schematic diagram of another structure for a magnetic foreign matter adsorption medium.

[0028] The markings in the above diagrams are as follows: 1. Electromagnetic component; 1.1. Housing; 1.2. Flow channel; 1.3. Electromagnetic coil; 1.4. Magnetic foreign matter adsorption medium; 1.4.1. Strip-shaped medium; 1.4.2. First annular medium; 1.4.3. Second annular medium; 1.4.4. Third annular medium; 1.4.5. Mesh medium; 2. Valve assembly; 2.1. First valve; 2.2. Second valve; 2.3. Third valve; 2.4. Fourth valve; 2.5. Fifth valve; 2.6. Sixth valve; 3. Raw material storage tank; 4. Purified material storage tank; 5. Magnetic foreign matter collection assembly; 6. Compressed air source; 7. Flushing liquid source; 8. Feed channel; 9. Return pipe; 10. Slag discharge channel; 11. Discharge channel; 12. Flushing channel; 13. Gas input channel. Detailed Implementation

[0029] In this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "planar direction", "circumferential", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0030] like Figures 1 to 2 As shown, an electromagnetic iron removal system for slurry purification of ternary precursors includes an electromagnetic component 1, a valve component 2, a control unit, a raw material storage tank 3, a purified material storage tank 4, and a magnetic foreign matter collection component 5. The electromagnetic component 1 adsorbs magnetic foreign matter by setting the current and voltage parameters of the electromagnetic iron removal machine for the slurry. The electromagnetic component 1 includes a housing 1.1. The valve component 2 is used to control the on / off state between various components in the system. The control unit is signal-connected to both the valve component 2 and the electromagnetic component 1 to control the opening and closing sequence of the valve component 2 and to change the current and voltage parameters of the electromagnetic component 1. The raw material storage tank 3 is connected to the valve component 2 via a conveying pump. The feed inlet and return outlet located below the shell 1.1 are connected to the discharge outlet located above the shell 1.1 via valve assembly 2. The magnetic foreign matter collection assembly 5 is connected to the slag discharge outlet located below the shell 1.1 via valve assembly 2. The compressed air source 6 and flushing liquid source 7 located at the upper end of the shell 1.1 are connected to the air inlet and liquid inlet located above the shell 1.1 via valve assembly 2. With the assistance of gravity, the non-magnetic materials in the shell 1.1 and the communication points between the components are blown from top to bottom into the raw material storage tank 3 and the magnetic foreign matter in the shell 1.1 is flushed into the magnetic foreign matter collection assembly 5.

[0031] A feed channel 8 is vertically arranged between the raw material storage tank 3 and the shell 1.1, and a return pipe 9 is horizontally arranged between the raw material storage tank 3 and the shell 1.1. A slag discharge channel 10 is horizontally arranged between the magnetic foreign matter collection component 5 and the shell 1.1. The return pipe 9 and the slag discharge channel 10 are respectively arranged on both sides of the feed channel 8 and are connected to the feed channel 8.

[0032] A discharge channel 11 is horizontally arranged between the purified material storage tank 4 and the shell 1.1. A flushing channel 12 is horizontally arranged between the flushing liquid source 7 and the shell 1.1. A gas input channel 13 is vertically arranged between the compressed air source 6 and the shell 1.1. The discharge channel 11 and the gas input channel 13 are arranged on both sides of the flushing channel 12 and are connected to the flushing channel 12.

[0033] A flow channel 1.2 is provided at the center of the housing 1.1, and the feed channel 8 is connected to the flushing channel 12 through the flow channel 1.2.

[0034] The valve assembly 2 includes a first valve 2.1 located at the feed inlet of the feed channel 8, a second valve 2.2 located at the slag discharge outlet of the slag discharge channel 10, a third valve 2.3 located at the return outlet of the return channel, a fourth valve 2.4 located at the discharge outlet of the discharge channel 11, a fifth valve 2.5 located at the liquid inlet of the flushing channel 12, and a sixth valve 2.6 located at the air inlet of the gas input channel 13.

[0035] The electromagnetic component 1 also includes several electromagnetic coils 1.3 that surround the flow channel 1.2 and are disposed within the housing 1.1 to generate a gradient magnetic field, and several magnetic foreign matter adsorption media 1.4 that are disposed within the flow channel 1.2 corresponding to the electromagnetic coils 1.3. The shape of the magnetic foreign matter adsorption media 1.4 is adapted to the inner wall of the flow channel 1.2.

[0036] like Figure 3 As shown, the magnetic foreign matter adsorption medium 1.4 consists of several strip-shaped media 1.4.1 arranged radially outward from the center, a first annular medium 1.4.2, a second annular medium 1.4.3, and a third annular medium 1.4.4 connecting the strip-shaped media 1.4.1. The diameter of the second annular medium 1.4.3 is smaller than the diameter of the third annular medium 1.4.4 but larger than the diameter of the first annular medium 1.4.2.

[0037] like Figure 4 As shown, the magnetic foreign matter adsorption medium 1.4 is a mesh medium 1.4.5.

[0038] Working status: When the slurry electromagnetic iron separator is energized, the current and voltage are set by the control unit, and the first valve 2.1 is opened. The slurry enters the flow channel 1.2 through the feed port of the feed channel 8 via the conveying pump after the raw material storage tank 3 and the first valve 2.1. After passing through the magnetic field inside the flow channel 1.2, magnetic foreign objects are adsorbed onto the magnetic foreign object adsorption medium 1.4 inside. The purified slurry enters the discharge port of the discharge channel 11 through the flushing channel 12 and enters the purified material storage tank 4 with the fourth valve 2.4 open.

[0039] Residual material discharge operation status: Keep the current of the slurry electromagnetic iron separator on, close the first valve 2.1 and the fourth valve 2.4, open the sixth valve 2.6 and the third valve 2.3, and the compressed air source 6 enters the flow channel 1.2 through the air inlet of the gas input channel 13 through the sixth valve 2.6, and blows the non-magnetic materials in the flow channel 1.2 and each pipe into the return port of the return channel through the third valve 2.3 via the feed channel 8 and back into the raw material storage tank 3;

[0040] Magnetic foreign object removal operation status: The current to the slurry electromagnetic separator is disconnected. After closing the sixth valve 2.6 and the third valve 2.3, the fifth valve 2.5 and the second valve 2.2 are opened. The flushing liquid source 7 flows through the fifth valve 2.5 from the inlet of the flushing channel 12, through the gas input channel 13, and into the flow channel 1.2. The magnetic foreign objects inside the flow channel 1.2 are discharged through the feed channel 8, through the second valve 2.2, and through the slag discharge port of the slag discharge channel 10 to the magnetic foreign object collection assembly 5. After closing the fifth valve 2.5, the sixth valve 2.6 is opened. The compressed air source 6 enters the flow channel 1.2 through the sixth valve 2.6 from the inlet of the gas input channel 13. The magnetic foreign objects and flushing liquid remaining inside the flow channel 1.2 are discharged through the feed channel 8, through the second valve 2.2, and through the slag discharge port of the slag discharge channel 10 to the magnetic foreign object collection assembly 5.

[0041] Before performing each state of work, the working time of the above three steps is set and the work is carried out in a cycle according to the set value to achieve the effect of demagnetizing the slurry.

[0042] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the technical solution of the present invention, or the direct application of the concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. An electromagnetic iron removal system for slurry used in the purification of ternary precursors, characterized in that: include An electromagnetic component, which adsorbs magnetic foreign objects by setting the current and voltage parameters of the slurry electromagnetic iron remover, includes a housing; Valve assemblies are used to control the on / off states between various components in a system. The control unit is connected to the valve assembly and the electromagnetic assembly respectively to control the opening and closing sequence of the valve assembly and change the current and voltage parameters of the electromagnetic assembly. The raw material storage tank is connected to the inlet and outlet located below the shell via a conveying pump and valve assembly. The purified material storage tank is connected to the discharge port located on the top of the shell via a valve assembly; A magnetic foreign matter collection component is connected to a slag discharge port located at the bottom of the housing via a valve assembly; The compressed air source and flushing fluid source located at the top of the housing are connected to the air inlet and liquid inlet located at the top of the housing through valve assembly. With the assistance of gravity, the non-magnetic materials in the housing and the communication between the components are blown from top to bottom into the raw material storage tank, and the magnetic foreign objects in the housing are flushed into the magnetic foreign object collection assembly.

2. The slurry electromagnetic iron removal system for ternary precursor purification according to claim 1, characterized in that: A feed channel is vertically arranged between the raw material storage tank and the shell, and a return pipe is horizontally arranged between the magnetic foreign matter collection component and the shell. A slag discharge channel is horizontally arranged between the magnetic foreign matter collection component and the shell. The return pipe and the slag discharge channel are respectively arranged on both sides of the feed channel and connected to the feed channel.

3. The electromagnetic iron removal system for slurry purification of ternary precursors according to claim 2, characterized in that: A discharge channel is horizontally provided between the purified material storage tank and the shell, a flushing channel is horizontally provided between the flushing liquid source and the shell, and a gas input channel is vertically provided between the compressed air source and the shell. The discharge channel and the gas input channel are located on both sides of the flushing channel and are connected to the flushing channel.

4. The electromagnetic iron removal system for slurry purification of ternary precursors according to claim 3, characterized in that: A flow channel is provided at the center of the shell, and the feeding channel is connected to the rinsing channel through the flow channel.

5. The electromagnetic iron removal system for slurry purification of ternary precursors according to claim 4, characterized in that: The valve assembly includes a first valve located at the feed inlet of the feed channel, a second valve located at the slag discharge outlet of the slag discharge channel, a third valve located at the return outlet of the return channel, a fourth valve located at the discharge outlet of the discharge channel, a fifth valve located at the liquid inlet of the flushing channel, and a sixth valve located at the air inlet of the gas input channel.

6. The electromagnetic iron removal system for slurry purification of ternary precursors according to claim 4, characterized in that: The electromagnetic component also includes several electromagnetic coils that are disposed within the housing and can generate a gradient magnetic field around the flow channel, and several magnetic foreign matter adsorption media that are disposed within the flow channel corresponding to the electromagnetic coils. The shape of the magnetic foreign matter adsorption media is adapted to the inner wall of the flow channel.

7. The electromagnetic iron removal system for slurry purification of ternary precursors according to claim 6, characterized in that: The magnetic foreign matter adsorption medium consists of several strip-shaped media arranged radially outward from the center, a first annular medium, a second annular medium, and a third annular medium connecting the several strip-shaped media. The diameter of the second annular medium is smaller than the diameter of the third annular medium but larger than the diameter of the first annular medium.

8. The electromagnetic iron removal system for slurry purification of ternary precursors according to claim 6, characterized in that: The magnetic foreign matter adsorption medium is a mesh medium.

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