Foreign matter screening device for superfine cobalt powder

Abstract

The utility model relates to the technical field of screening of metal powder, in particular to a foreign matter screening device for superfine cobalt powder, which comprises a screening cylinder and a stirring component fixed on the outer wall of the screening cylinder, the screening cylinder comprises a first cylinder body and a second cylinder body which are arranged from top to bottom, the second cylinder body is used for vibrating the first cylinder body, and a screen is arranged on the upper portion of an inner cavity of the first cylinder body. The bottom face of the first cylinder communicates with a water outlet pipe extending out of the second cylinder, and the stirring end of the stirring assembly is inserted into the first cylinder and attached to the screen. The cobalt powder screening device has the advantages that the stirring assembly and the screen are arranged, in the working state, the stirring end of the stirring assembly stirs in water, it is guaranteed that cobalt powder particles are not prone to flocculation, screened cobalt powder can rapidly pass through the screen face, foreign matter is screened out, the vibration effect is enhanced through the second barrel used for vibrating the first barrel, and the screening effect is improved. The screening efficiency of the foreign matter in the superfine cobalt powder is remarkably improved, and operation is easy, safe and efficient.

Description

Technical Field

[0001] The utility model relates to the technical field of metal powder screening, in particular to a foreign matter screening device for ultrafine cobalt powder. Background Art

[0002] Cobalt powder, as an important industrial raw material, is widely used in powder metallurgy applications such as cemented carbide and diamond tools. Traditional hydrogen reduction is one of the primary methods for producing ultrafine cobalt powder. This method involves loading cobalt salt or cobalt oxide raw materials into a stainless steel boat, followed by a hydrogen reduction reaction in a tubular reduction furnace to produce sponge cobalt. The sponge cobalt is then processed in a jet mill to produce ultrafine cobalt powder with a particle size ranging from 0.5μm to 1.5μm. Electrostatic forces between the particles create significant adhesion, resulting in poor fluidity.

[0003] During the production of powder metallurgy materials, the presence of foreign matter can severely impact the performance and reliability of the final product. Therefore, foreign matter detection is a critical step in ensuring product quality. Traditional wet screening methods for ultrafine cobalt powders can cause coagulation, leading to inaccurate screening results and inaccurate assessment of product quality. This results in low screening efficiency and significant time and labor costs. These issues severely hinder improvements in production efficiency and product quality. Utility Model Content

[0004] The utility model aims to provide a foreign matter screening device for ultrafine cobalt powder, which solves the technical problem that cobalt powder particles are prone to flocculation during screening by existing wet screening devices, thereby causing deviations in screening results and affecting the accurate assessment of product quality.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a foreign matter screening device for ultrafine cobalt powder, comprising a screening cylinder and a stirring assembly fixed to the outer wall of the screening cylinder, the screening cylinder comprising a first cylinder arranged from top to bottom and a second cylinder for vibrating the first cylinder, a screen is arranged in the upper part of the inner cavity of the first cylinder, the bottom surface of the first cylinder is connected to the water outlet pipe extending from the second cylinder, and the stirring end of the stirring assembly is inserted into the first cylinder and fits the screen. In the present invention, the device is provided with a stirring assembly and a screen. In the working state, the stirring end of the stirring assembly stirs in the water, ensuring that the cobalt powder particles are not easily flocculated, so that the screened cobalt powder can quickly pass through the screen surface and screen out foreign matter. By using the second cylinder for vibrating the first cylinder, the vibration effect is enhanced, and the screening efficiency of foreign matter in the ultrafine cobalt powder is significantly improved. The operation is simple, safe and efficient.

[0006] As a preferred embodiment of the present invention, a device for screening foreign matter from ultrafine cobalt powder comprises a stirring assembly comprising a fixed base, a support rod, an agitator, and a stirring paddle. The fixed base is disposed at the bottom of the outer wall of the second cylinder, and the support rod is disposed on the top surface of the fixed base. One end of the support rod is connected to the agitator, and the output end of the agitator is connected to the stirring paddle. The stirring paddle is inserted into the first cylinder and engages with the screen. By arranging the stirring paddle to engage with the screen, the utility model prevents cobalt powder particles from flocculating during stirring, making it easier to screen out foreign matter.

[0007] As a preferred embodiment of the foreign matter screening device for ultrafine cobalt powder of the present invention, a plastic brush is provided on the side of the stirring paddle contacting the screen. The provision of the plastic brush in the present invention further prevents the cobalt powder from flocculating and reduces the deviation of the screening result.

[0008] As a preferred embodiment of the present invention's foreign body screening device for ultrafine cobalt powder, the second cylinder is configured as a closed structure, and an ultrasonic generator is disposed at the top of the second cylinder's inner cavity. The ultrasonic generator reduces particle adhesion to the screen, effectively preventing mesh clogging, improving screening effectiveness, and increasing screening efficiency.

[0009] As a preferred embodiment of the foreign matter screening device for ultrafine cobalt powder of the present invention, a water outlet valve is provided on the water outlet pipe. In the present invention, the water outlet valve is controlled to discharge water from the first cylinder. During the screening process, the water outlet valve and the water inlet valve are opened simultaneously, with the flow rate of the water outlet valve being slightly greater than that of the water inlet valve. The flowing water can also accelerate the passage of particles through the screen surface while transmitting ultrasonic vibrations to lubricate the friction between the stirring paddle and the screen.

[0010] The beneficial effects of the foreign matter screening device for ultrafine cobalt powder of the utility model are as follows: the utility model can make the screened particles pass through the screen surface quickly by combining the effects of ultrasonic vibration, stirring of a stirring paddle and flow of water, thereby significantly improving the screening efficiency and screening effect; the ultrasonic vibration can not only make the particles pass through the screen surface quickly, but also prevent the mesh from being blocked; the stirring of the stirring paddle in combination with the plastic brush can accelerate the particles to pass through the screen surface; the flowing water can also accelerate the particles to pass through the screen surface, while transmitting ultrasonic vibration to lubricate the friction between the stirring paddle and the screen, making it less likely for cobalt powder to flocculate, simple to operate and improving the screening efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work. Among them:

[0012] Figure 1 It is a schematic diagram of the external structure of the device in the utility model.

[0013] Figure 2 It is a schematic diagram of the internal structure of the device in the present utility model. DETAILED DESCRIPTION

[0014] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below with reference to the accompanying drawings.

[0015] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0016] Secondly, the term "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in various places throughout this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0017] Reference Figure 1-2 This embodiment provides a foreign matter screening device for ultrafine cobalt powder. The device is provided with a stirring component 2 and a screen 3. The stirring end of the stirring component 2 stirs in water to ensure that the cobalt powder particles are not easily flocculated, so that the screened cobalt powder can quickly pass through the screen surface and screen out foreign matter; the second cylinder 12 is used to vibrate the first cylinder 11, thereby enhancing the vibration effect, significantly improving the screening efficiency of foreign matter in the ultrafine cobalt powder, and the operation is simple, safe and efficient.

[0018] A foreign matter screening device for ultrafine cobalt powder includes a screening drum 1 and a stirring assembly 2 fixed on the outer wall of the screening drum 1. The screening drum 1 includes a first cylinder 11 arranged from top to bottom and a second cylinder 12 for vibrating the first cylinder 11. The first cylinder 11 is an unsealed cylindrical container. A screen 3 is provided on the upper part of the inner cavity of the first cylinder 11. The bottom surface of the first cylinder 11 is connected to a water outlet pipe 13 extending out of the second cylinder 12. The stirring end of the stirring assembly 2 is inserted into the first cylinder 11 and fits the screen 3.

[0019] Among them, the screen 3 is connected to the first cylinder 11 through fasteners. The screen 3 is set to be a circular stainless steel material. The outer diameter of the screen 3 is smaller than the inner diameter of the inner cavity of the first cylinder 11. The screen 3 can be selected with different apertures according to needs.

[0020] Specifically, the stirring assembly 2 includes a fixed seat 21, a support rod 22, an agitator 23 and a stirring paddle 24. The fixed seat 21 is set at the bottom of the outer wall of the second cylinder 12, and the support rod 22 is set on the top surface of the fixed seat 21. One end of the support rod 22 is connected to the agitator 23, and the output end of the agitator 23 is connected to the stirring paddle 24. The stirring paddle 24 is inserted into the first cylinder 11 and fits the screen 3. The stirring paddle 24 is provided with at least one blade.

[0021] Furthermore, a plastic brush is provided on one side of the stirring paddle 24 that is in contact with the screen 3. During the stirring process, the plastic brush makes the cobalt powder particles less likely to flocculate and pass through the screen surface more quickly.

[0022] Preferably, the second cylinder 12 is configured as a closed structure, and an ultrasonic generator 4 is provided at the top of the inner cavity of the second cylinder 12 , and the ultrasonic generator 4 is closely attached to the bottom of the first cylinder 11 .

[0023] Furthermore, a water outlet valve 14 is provided on the water outlet pipe 13 .

[0024] When using this device to screen out foreign matter from ultrafine cobalt powder, follow the steps below:

[0025] 1. Open the external water inlet valve and inject pure water into the first cylinder 11 until the water level covers the blades of the stainless steel stirring paddle 24, and then close the water injection;

[0026] 2. Weigh 20g of ultrafine cobalt powder and place it on a round stainless steel sieve 3 until the powder is completely submerged in water;

[0027] 3. Set the speed of the stirrer 23 to 50 rpm, turn on the stirrer 23, and start stirring the ultrafine cobalt powder submerged in the water;

[0028] 4. Turn on the ultrasonic generator 4;

[0029] 5. Open the water outlet valve 14 and the water inlet valve at the same time, and the flow rate of the water outlet valve 14 is slightly greater than that of the water inlet valve;

[0030] 6. When the bottom of the screen 3 emerges from the water surface, close the water inlet valve, stirrer 23, ultrasonic generator 4, and water outlet valve 14 in sequence;

[0031] 7. Observe the material on the sieve according to the enterprise standard to see if there are any foreign objects other than cobalt powder. If so, it is judged as unqualified. If not, it is judged as qualified.

[0032] The utility model can make the sieved particles pass through the screen surface quickly by combining the effects of ultrasonic vibration, stirring of a stirring paddle and flow of water, thereby significantly improving the screening efficiency and screening effect; the ultrasonic vibration can not only make the particles pass through the screen surface quickly, but also prevent the mesh of the screen 3 from being clogged; the stirring of the stirring paddle 24 combined with the plastic brush can accelerate the particles to pass through the screen surface; the flowing water can also accelerate the particles to pass through the screen surface, while transmitting ultrasonic vibration, lubricating the friction between the stirring paddle 24 and the screen 3, making it less likely for cobalt powder to flocculate, simple to operate and improving the screening efficiency.

[0033] Any portion of the above description not specifically described herein is prior art or can be implemented using prior art. Furthermore, the specific implementation examples described in this utility model are merely preferred implementation examples of this utility model and are not intended to limit the scope of this utility model. In other words, any equivalent variations and modifications made within the scope of this utility model should be considered within the technical scope of this utility model.

Claims

1. A foreign matter screening device for ultrafine cobalt powder, characterized by: The invention comprises a screening cylinder (1) and a stirring assembly (2) fixed to the outer wall of the screening cylinder (1); the screening cylinder (1) comprises a first cylinder (11) arranged from top to bottom and a second cylinder (12) for vibrating the first cylinder (11); a screen (3) is arranged at the upper part of the inner cavity of the first cylinder (11); the bottom surface of the first cylinder (11) is connected to a water outlet pipe (13) extending from the second cylinder (12); and a stirring end of the stirring assembly (2) is inserted into the first cylinder (11) and is in contact with the screen (3); The stirring assembly (2) includes a fixed seat (21), a support rod (22), an agitator (23) and a stirring paddle (24); the fixed seat (21) is provided at the bottom of the outer wall of the second cylinder (12); the support rod (22) is provided on the top surface of the fixed seat (21); one end of the support rod (22) is connected to the agitator (23); the output end of the agitator (23) is connected to the stirring paddle (24); the stirring paddle (24) is inserted into the first cylinder (11) and is attached to the screen (3); A plastic brush is provided on one side of the stirring paddle (24) that is in contact with the screen (3).

2. The foreign matter screening device for ultrafine cobalt powder according to claim 1, characterized in that: The second cylinder (12) is configured as a closed structure, and an ultrasonic generator (4) is provided at the top of the inner cavity of the second cylinder (12).

3. The foreign matter screening device for ultrafine cobalt powder according to claim 1, characterized in that: A water outlet valve (14) is provided on the water outlet pipe (13).

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