Alloy powder screening equipment

Abstract

The utility model discloses an alloy powder screening device which comprises a buffering stock bin used for collecting dried alloy powder, a cooling system used for cooling materials is arranged on the buffering stock bin, the discharging end of the buffering stock bin is connected with multiple stages of screening mechanisms through pipelines, the multiple stages of screening mechanisms are arranged in an up-and-down mode, and screens are arranged in the screening mechanisms. The upper parts of the screens of the screening mechanisms are communicated, and collecting devices are arranged below the screens of the screening mechanisms; the utility model mainly aims to realize the rapid cooling and one-time screening and grading of alloy powder, reduce the waiting time of production and improve the one-time screening rate of the powder, thereby improving the production efficiency and the utilization rate of raw materials.

Description

Technical Field

[0001] The utility model relates to the technical field of alloy powder preparation, in particular to a screening device for alloy powder. Background Art

[0002] With the increasing market demand for alloy powders and customer product upgrades, the performance requirements for alloy powder products are getting higher and higher, and the performance of alloy powders is highly correlated with particle size. Metal powders are generally prepared by melting, atomizing and screening processes, and the screening equipment and parameters have a great impact on product performance.

[0003] In current industrial production, smelting atomization followed by screening is widely used. The principle is to add solid metal raw materials into the medium frequency furnace in a certain proportion, and then melt them into liquid metal and tilt the medium frequency furnace. The tilting speed is slowly controlled to control the flow rate of the liquid into the tundish, and then it is atomized by high-pressure water or gas cutting to form powder, and then screened to obtain the required powder.

[0004] Regarding powder screening, the existing technology is a laser selective melting technology for forming aluminum-lithium alloy powder and its preparation method and application with publication number CN117965979A; in this process, the powder is directly screened after atomization during screening, while some technologies store and cool it first, and then screen it to obtain the required particle size. Screening at high temperature can easily cause the screen to deform, which will change the particle size of the product, resulting in a decrease in the performance of the screened powder and also affecting the service life of the screen; while the method of storing and cooling first and then screening it causes low efficiency. Utility Model Content

[0005] The purpose of the utility model is to provide an alloy powder screening device, which solves the problem of low efficiency and poor product performance of the alloy powder screening technology in the prior art.

[0006] The utility model is implemented as follows: a screening device for alloy powder comprises a buffer silo for collecting dried alloy powder, a cooling system for cooling materials is arranged on the buffer silo, a multi-stage screening mechanism is arranged at the discharge end of the buffer silo, the multi-stage screening mechanism is arranged up and down, a screen is arranged in the screening mechanism, the screens above the screening mechanism are connected, and a collecting device is arranged below the screens of the screening mechanism.

[0007] When the atomized alloy powder is dried, the temperature of the alloy powder that has just been dried is 120°C, and the alloy powder falls into the buffer silo, and is cooled by the cooling system on the buffer silo. The cooled alloy powder enters the multi-stage screening mechanism; the multi-stage screening mechanisms are set up up and down so that the powder falls into the next stage of screening under its own gravity and the vibration of the screening mechanism, thereby reducing the driving power. Moreover, the screening mechanisms of the multi-stage screening mechanism are connected above the screen and collected below the screen. Therefore, alloy powders with different particle size requirements can be directly taken from the collection device below the corresponding screening mechanism. When alloy powders with intermediate particle sizes are needed, they can also be collected through the collection device in the utility model. It has strong flexibility and can continuously screen multi-stage alloy powders at one time, with high efficiency and improved one-time screening rate of powder. The main purpose of the utility model is to achieve rapid cooling and one-time screening and grading of alloy powder, reduce production waiting time and improve the one-time screening rate of powder, thereby improving production efficiency and raw material utilization.

[0008] A further technical solution of the utility model is that the upper part of the screening mechanism screen is connected with the feed end of the adjacent screening mechanism below through a pipeline.

[0009] The material above the screen of the screening mechanism enters the screening mechanism below through a pipeline, and is further screened by the screening mechanism below. In this process, under the gravity of the material itself and the vibration of the screening mechanism, the material can smoothly enter the next screening mechanism.

[0010] A further technical solution of the utility model is: the multi-stage screening mechanism includes a first screening mechanism, a second screening mechanism, and a third screening mechanism which are connected in sequence from top to bottom, the feed end of the first screening mechanism is connected to the discharge end of the buffer silo, the top of the first screening mechanism screen is connected to the feed end of the second screening mechanism, the top of the second screening mechanism screen is connected to the feed end of the third screening mechanism, a gathering device is connected above the screen of the third screening mechanism, and a collecting device is provided below the screens of the first screening mechanism, the second screening mechanism and the third screening mechanism.

[0011] The feed end of the first screening mechanism, the feed end of the second screening mechanism and the feed end of the third screening mechanism are all placed above the screen, and a collecting device is provided under the screen of the first screening mechanism, the second screening mechanism and the third screening mechanism. Alloy powders with different particle size requirements can be directly taken from the collecting device under the corresponding screening mechanism. When alloy powders with intermediate particle sizes are required, they can also be collected by the collecting device in the utility model. It has strong flexibility and can continuously screen multiple levels of alloy powders at one time, with high efficiency and improved one-time screening rate of powder.

[0012] A further technical solution of the utility model is: the collecting device includes a primary collecting device connected to the bottom of the first screening mechanism screen, a secondary collecting device connected to the bottom of the second screening mechanism screen, and a tertiary collecting device connected to the bottom of the third screening mechanism screen.

[0013] The sieve particle sizes in the first screening mechanism, the second screening mechanism and the third screening mechanism are different, and the corresponding first-stage collecting device, the second-stage collecting device and the third-stage collecting device collect alloy powders with different particle sizes. The staff can take the powders with corresponding particle sizes as needed. The screening of the utility model is carried out continuously, and multi-grade alloy powders can be obtained by one screening, which is efficient and improves the one-time screening rate of the powder.

[0014] A further technical solution of the utility model is: the first screening mechanism is connected to the second screening mechanism through a first pipeline, and the second screening mechanism is connected to the third screening mechanism through a second pipeline.

[0015] The first pipeline and the second pipeline are both connected to the side wall of the screening mechanism; in order to ensure the screening efficiency of the alloy powder, the first pipeline and the second pipeline extend into the inner middle part of the screening mechanism.

[0016] A further technical solution of the utility model is that the apertures of the screens of the multi-stage screening mechanism increase in sequence from top to bottom.

[0017] The particle size of the top screening mechanism is the smallest, and the alloy powder obtained is the finest. The particle size of the alloy powder above the screen is larger than the finest alloy powder, and enters the next screening mechanism to further screen out the second finest powder. And so on. The particle size of the alloy powder collected by the collecting device from top to bottom gradually increases.

[0018] A further technical solution of the utility model is: the cooling system comprises a cooling pipeline, the lower end of the cooling pipeline is a refrigerant inlet and the upper end of the cooling pipeline is a refrigerant outlet.

[0019] Due to the gravity of the refrigerant, the refrigerant inlet is at the bottom and the outlet is at the top, which can increase the contact between the refrigerant and the material, thereby increasing the cooling effect.

[0020] A further technical solution of the utility model is that the cooling pipeline is arranged along the outer periphery of the buffer silo.

[0021] The cooling pipeline is outside the buffer silo for easy operation, observation and maintenance.

[0022] A further technical solution of the utility model is that an ultrasonic generating device is provided on the screening mechanism.

[0023] The ultrasonic generator can be used to accelerate the screening of alloy powder by the screen, and at the same time can accelerate the powder above the screen to fall into the next level screening mechanism for processing.

[0024] The beneficial effects of the utility model are as follows: when the atomized alloy powder is dried, the temperature of the alloy powder that has just been dried is 120°C, and the alloy powder falls into the buffer silo, and is cooled by the cooling system on the buffer silo. The cooled alloy powder enters the multi-stage screening mechanism; the multi-stage screening mechanism is set up up and down so that the powder falls into the next stage of screening under its own gravity and the vibration of the screening mechanism, thereby reducing the driving power. Moreover, the screening mechanisms of the multi-stage screening mechanism are connected above the screen and collected below the screen. Therefore, alloy powders with different particle size requirements can be directly taken from the collecting device below the corresponding screening mechanism. When alloy powders with intermediate particle sizes are needed, they can also be collected through the collecting device in the utility model. It has strong flexibility and can continuously screen multi-stage alloy powders at one time, with high efficiency and improved one-time screening rate of powder. The main purpose of the utility model is to achieve rapid cooling and one-time screening and grading of alloy powder, reduce production waiting time and improve the one-time screening rate of powder, thereby improving production efficiency and raw material utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 The utility model is a structural schematic diagram of an alloy powder screening device provided by the utility model.

[0026] Figure numerals: 1. Screen, 2. Refrigerant outlet, 3. Buffer silo, 4. Cooling pipeline, 5. Refrigerant inlet, 7. First screening mechanism, 8. Primary collecting device, 9. First pipeline, 10. Second screening mechanism, 11. Secondary collecting device, 12. Second pipeline, 13. Third screening mechanism, 14. Third-level collecting device, 15. Aggregation device. DETAILED DESCRIPTION

[0027] The following is an explanation of the implementation of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific implementations, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention.

[0028] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of the present specification are only used to match the contents disclosed in the specification for people familiar with the technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present utility model, should still fall within the scope of the technical contents disclosed by the present utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in the present specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present utility model. The change or adjustment of the relative relationship, without substantial change of the technical contents, should also be regarded as the scope of the implementation of the present utility model.

[0029] Embodiment 1:

[0030] Figure 1 A screening device for alloy powder is shown, including a buffer silo 3 for collecting dried alloy powder, the buffer silo 3 is provided with a cooling system for cooling the material, a multi-stage screening mechanism is provided at the discharge end of the buffer silo 3, the multi-stage screening mechanisms are arranged up and down, a screen 1 is provided in the screening mechanism, the tops of the screens 1 of the screening mechanism are connected, and a collecting device is provided below the screens 1 of the screening mechanism.

[0031] When the atomized alloy powder is dried, the temperature of the alloy powder that has just been dried is 120°C, and the alloy powder falls into the buffer silo, and is cooled by the cooling system on the buffer silo. The cooled alloy powder enters the multi-stage screening mechanism; the multi-stage screening mechanisms are set up up and down so that the powder falls into the next stage of screening under its own gravity and the vibration of the screening mechanism, thereby reducing the driving power. Moreover, the screening mechanisms of the multi-stage screening mechanism are connected above the screen and collected below the screen. Therefore, alloy powders with different particle size requirements can be directly taken from the collection device below the corresponding screening mechanism. When alloy powders with intermediate particle sizes are needed, they can also be collected through the collection device in the utility model. It has strong flexibility and can continuously screen multi-stage alloy powders at one time, with high efficiency and improved one-time screening rate of powder. The main purpose of the utility model is to achieve rapid cooling and one-time screening and grading of alloy powder, reduce production waiting time and improve the one-time screening rate of powder, thereby improving production efficiency and raw material utilization.

[0032] In this embodiment, the cooling system is placed on the periphery of the buffer silo to cool the materials.

[0033] In this embodiment, the outlet of the buffer silo is placed above the feed inlet of the multi-stage screening mechanism.

[0034] In this embodiment, the multi-stage screening mechanism includes multiple screening mechanisms with different screening particle sizes, and the multiple screening mechanisms are connected up and down in sequence. The screening mechanism connected to the buffer silo is the first screening mechanism, and the second screening mechanism is connected to the top of the screen of the first screening mechanism. The top of the screen of the first screening mechanism is higher than the feed end of the second screening mechanism, and the top of the screen of the second screening mechanism is higher than the feed end of the third screening mechanism. The upper and lower settings of the multi-stage screening mechanism are similar.

[0035] As another embodiment, two layers of screens are provided in a screening mechanism, and the pipeline can be placed above the first layer of screen or the second layer of screen according to the requirements of the powder particle size, and the pipeline and the screening mechanism are detachably connected.

[0036] In this embodiment, the top of the screening mechanism screen is connected to the feed end of the adjacent screening mechanism below through a pipeline.

[0037] The material above the screen of the screening mechanism enters the screening mechanism below through a pipeline, and is further screened by the screening mechanism below. In this process, under the gravity of the material itself and the vibration of the screening mechanism, the material can smoothly enter the next screening mechanism.

[0038] In this embodiment, the multi-stage screening mechanism includes a first screening mechanism 7, a second screening mechanism 10, and a third screening mechanism 13 which are connected in sequence from top to bottom. The feed end of the first screening mechanism 7 is connected to the discharge end of the buffer silo 3, the top of the first screening mechanism 7 is connected to the feed end of the second screening mechanism 10, the top of the second screening mechanism 10 is connected to the feed end of the third screening mechanism 13, and a collection device 15 is connected above the screen of the third screening mechanism 13. Collection devices are provided below the screens of the first screening mechanism 7, the second screening mechanism 10 and the third screening mechanism 13.

[0039] The feed end of the first screening mechanism 7, the feed end of the second screening mechanism and the feed end of the third screening mechanism are all placed above the screen, and a collecting device is provided under the screen of the first screening mechanism, the second screening mechanism and the third screening mechanism. Alloy powders with different particle size requirements can be directly taken from the collecting device under the corresponding screening mechanism. When alloy powders with intermediate particle sizes are required, they can also be collected by the collecting device in the utility model. It has strong flexibility and can continuously screen multiple levels of alloy powders at one time, with high efficiency and improved one-time screening rate of powder.

[0040] In this embodiment, the collecting device includes a primary collecting device 8 connected to the bottom of the first screening mechanism 7, a secondary collecting device 11 connected to the bottom of the second screening mechanism 10, and a tertiary collecting device 14 connected to the bottom of the third screening mechanism 13.

[0041] The sieve particle sizes in the first screening mechanism, the second screening mechanism and the third screening mechanism are different, and the corresponding first-stage collecting device, the second-stage collecting device and the third-stage collecting device collect alloy powders with different particle sizes. The staff can take the powders with corresponding particle sizes as needed. The screening of the utility model is carried out continuously, and multi-grade alloy powders can be obtained by one screening, which is efficient and improves the one-time screening rate of the powder.

[0042] In this embodiment, the first screening mechanism 7 is connected to the second screening mechanism 10 through the first pipeline 9 , and the second screening mechanism 10 is connected to the third screening mechanism 13 through the second pipeline 12 .

[0043] The first pipeline and the second pipeline are both connected to the side wall of the screening mechanism; in order to ensure the screening efficiency of the alloy powder, the first pipeline and the second pipeline extend into the inner middle part of the screening mechanism.

[0044] In this embodiment, the mesh apertures of the multi-stage screening mechanism increase from top to bottom.

[0045] The particle size of the top screening mechanism is the smallest, and the alloy powder obtained is the finest. The particle size of the alloy powder above the screen is larger than the finest alloy powder, and enters the next screening mechanism to further screen out the second finest powder. And so on. The particle size of the alloy powder collected by the collecting device from top to bottom gradually increases.

[0046] In this embodiment, the cooling system includes a cooling pipeline 4 , wherein the lower end of the cooling pipeline 4 is a refrigerant inlet 5 and the upper end of the cooling pipeline 4 is a refrigerant outlet 2 .

[0047] Due to the gravity of the refrigerant, the refrigerant inlet is at the bottom and the outlet is at the top, which can increase the contact between the refrigerant and the material, thereby increasing the cooling effect.

[0048] In this embodiment, the cooling pipeline 4 is arranged along the outer circumference of the buffer silo 3 .

[0049] The cooling pipeline is outside the buffer silo for easy operation, observation and maintenance.

[0050] In this embodiment, an ultrasonic generating device is provided on the screening mechanism.

[0051] The ultrasonic generator can be used to accelerate the screening of alloy powder by the screen, and at the same time can accelerate the powder above the screen to fall into the next level screening mechanism for processing.

[0052] Working principle: when the atomized alloy powder is dried, the temperature of the alloy powder that has just been dried is 120°C. The original production method is to stop introducing the heat source into the dryer and cool it down. In the utility model, the dried alloy powder can be immediately put into the buffer silo, and then a refrigerant, including but not limited to water, ammonia water, ice water, etc., is introduced into the cooling pipeline. The refrigerant enters from the lower part of the cooling pipeline, flows out from the upper part after cooling the alloy powder, and stops cooling to the required temperature. The refrigerant is all returned to the refrigerant pool under the action of gravity, and is no longer cooled during the screening process. The alloy powder enters the first stage screening from the buffer silo, and the sieved powder and the sieved powder are obtained through the first screening mechanism. The feed port of the second screening mechanism is directly connected to the discharge port of the sieved powder of the first screening mechanism. After the second stage screening, the grading is carried out in this way, including but not limited to the third and fourth stages, to increase the sieved proportion of the alloy powder and obtain the powder we need, thereby improving the utilization rate of our raw materials. After adopting this alloy powder screening process and equipment, the magnetic permeability and saturation of the original metal powder with the same production process parameters increased from 28 and 80.5% to 29 and 81% respectively, and the powder particle size D90 decreased from 60 to 40, and the distribution became significantly narrower. At the same time, the production cycle time was reduced by more than one hour, and the economic benefits were very obvious.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A screening device for alloy powder, characterized in that: The invention comprises a buffer silo (3) for collecting dried alloy powder, the buffer silo (3) being provided with a cooling system for cooling materials, a discharge end of the buffer silo (3) being connected to a multi-stage screening mechanism via a pipeline, the multi-stage screening mechanisms being arranged up and down, a screen (1) being provided in the screening mechanism, the tops of the screening mechanism screens (1) being connected, and a collecting device being provided below the screening mechanism screens (1).

2. The alloy powder screening device according to claim 1, characterized in that: The top of the screening mechanism screen (1) is connected to the feed end of the adjacent screening mechanism below through a pipeline.

3. The alloy powder screening device according to claim 1, characterized in that: The multi-stage screening mechanism comprises a first screening mechanism (7), a second screening mechanism (10), and a third screening mechanism (13) which are connected in sequence from top to bottom, wherein the feed end of the first screening mechanism (7) is connected to the discharge end of the buffer bin (3), the first screening mechanism (7) is connected above the screen mesh to the feed end of the second screening mechanism (10), the second screening mechanism (10) is connected above the screen mesh to the feed end of the third screening mechanism (13), a material collecting device (15) is connected above the screen mesh of the third screening mechanism (13), and a collecting device is provided below the screen meshes of the first screening mechanism (7), the second screening mechanism (10), and the third screening mechanism (13).

4. The alloy powder screening device according to claim 3, characterized in that: The collecting device comprises a primary collecting device (8) connected to the bottom of the screen of the first screening mechanism (7), a secondary collecting device (11) connected to the bottom of the screen of the second screening mechanism (10), and a tertiary collecting device (14) connected to the bottom of the screen of the third screening mechanism (13).

5. The alloy powder screening device according to claim 3, characterized in that: The first screening mechanism (7) is connected to the second screening mechanism (10) via a first pipeline (9), and the second screening mechanism (10) is connected to the third screening mechanism (13) via a second pipeline (12).

6. The alloy powder screening device according to claim 1, characterized in that: The apertures of the screens (1) of the multi-stage screening mechanism increase from top to bottom.

7. The alloy powder screening device according to claim 1, characterized in that: The cooling system comprises a cooling pipeline (4), the lower end of the cooling pipeline (4) is a refrigerant inlet (5), and the upper end of the cooling pipeline (4) is a refrigerant outlet (2).

8. The alloy powder screening device according to claim 7, characterized in that: The cooling pipeline (4) is arranged along the outer periphery of the buffer silo (3).

9. The alloy powder screening device according to claim 1, characterized in that: The screening mechanism is provided with an ultrasonic generating device.

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