Device for preparing micron-sized spherical powder

Abstract

The utility model belongs to the technical field of machining, and particularly discloses a device for preparing micron-sized spherical powder, which comprises a smelting system, an ultrasonic atomization system and a powder collecting system which are sequentially connected according to a material flowing direction, the system further comprises an intelligent control system and a gas replacement system. The gas replacement system is connected with the ultrasonic atomization system; the intelligent control system is connected with the smelting system, the ultrasonic atomization system, the powder collecting system and the gas replacement system. The device for preparing the magnesium hydride metal powder is low in power, small in energy consumption, high in safety coefficient, simple in process and capable of obtaining uniform and high-purity spherical magnesium powder.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of metal powder raw material preparation technology, specifically relates to a device for preparing micron -sized spherical powder. BACKGROUND

[0002] China's magnesium resource reserves are very rich, and the original magnesium output has been the world's first for many years. Metal magnesium is a kind of chemical property active, can react with oxygen in air to generate magnesium oxide at normal temperature, and can react with nitrogen to generate magnesium nitride at 350 DEG C. Therefore, it has important role in space launch, missile and solid fuel, and can also be used as reducing agent, desulfurizer and the like. Meanwhile, magnesium-based hydrogen storage material also has the advantages of small density, high hydrogen storage capacity and the like.

[0003] At present, the heating device power of the gas atomization and evaporation condensation powder preparation method is large, the cooling time is long, and the safety factor is poor when powdering at high temperature. The high-energy ball milling method is to pass inert gas into the grinding tank, and then put millimeter-sized magnesium powder and zirconia grinding balls into the tank for long-time grinding. However, the obtained magnesium particles will be adhered to the wall of the container in large amount, and the process is complicated, and the purity of magnesium powder is low. Moreover, these methods only include powdering, and magnesium hydride also has high hydrogen storage performance, which has great effect on the preparation of magnesium-based hydrogen storage alloy. Meanwhile, if different particle sizes of metal powder are prepared by using the existing ultrasonic powdering technology, the ultrasonic vibration rod needs to be replaced, and the operation is complicated.

[0004] Therefore, how to provide a new device for preparing micron -sized spherical powder is a technical problem to be solved by those skilled in the art. CONTENT OF THE UTILITY MODEL

[0005] In view of the problems of high temperature evaporation, large power, low safety factor, low yield and low purity in the existing magnesium powder preparation process, the utility model provides a new device for preparing micron -sized spherical powder by using ultrasonic atomization technology. The temperature is lower than that of the evaporation condensation powdering device, the power is low, the energy consumption is small, the safety factor is high compared with the gas atomization, the process is simple compared with the high-energy ball milling method, and uniform and high-purity spherical magnesium powder can be obtained.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A device for preparing micron -sized spherical powder, comprising a melting system, an ultrasonic atomization system and a powder collecting system connected in sequence according to the material flow direction.

[0008] It also includes an intelligent control system and a gas replacement system.

[0009] The gas replacement system is connected with the ultrasonic atomization system, and is used for replacing air in the whole device for preparing micron -sized spherical powder with inert gas.

[0010] The intelligent control system is connected with the smelting system, the ultrasonic atomization system, the powder collecting system and the gas replacement system respectively.

[0011] Preferably, the smelting system comprises a feeding pipeline, a smelting furnace, a solution collecting tank and a discharging pipeline connected in sequence; the discharging pipeline is connected with the ultrasonic atomization system.

[0012] The temperature sensing element is further included, which is located in the smelting furnace and connected with the intelligent control system.

[0013] Preferably, the ultrasonic atomization system comprises a bin body, an ultrasonic vibration rod, a fan, a cooling liquid system and a conical discharging barrel.

[0014] The bin body comprises an outer shell and an inner container, a plurality of small downward inclined holes are arranged on the four walls of the inner container, a wind chamber is formed between the outer shell and the inner container, the space in the inner container is an ultrasonic bin chamber, and the fan communicates with the cavity formed by the outer shell and the inner container.

[0015] The smelting system is connected with the ultrasonic bin chamber.

[0016] The ultrasonic vibration rod, the fan and the conical discharging barrel are connected with the ultrasonic bin chamber respectively.

[0017] The lower outer wall of the bin body is in contact with the cooling liquid in the cooling liquid system.

[0018] The ultrasonic vibration rod, the fan and the cooling liquid system are connected with the intelligent control system respectively.

[0019] Preferably, the diameters of the small holes on the four walls of the inner container are 2-3 mm, and the downward inclined angle is 30°-60° with the horizontal. The small holes on the four walls of the inner container can make the powder quickly form through the wind of the fan, and the particle size is more uniform during the forming.

[0020] Preferably, the cooling liquid system comprises a cooling liquid tank, a cooling liquid pipeline, a cooling liquid control valve and a cooling liquid temporary storage chamber connected in sequence; the cooling liquid temporary storage chamber wraps the outer wall of the lower part of the bin body.

[0021] The cooling liquid control valve is connected with the intelligent control system.

[0022] Preferably, the gas replacement system comprises a vacuum pump, an expansion cavity and an inert gas cylinder.

[0023] The inert gas cylinder is connected with the bin body and the smelting system respectively; the inlet and outlet of the vacuum pump are connected with the bin body and the expansion cavity respectively.

[0024] The vacuum pump is connected with the intelligent control system.

[0025] Preferably, the ultrasonic vibration rod is controlled at a frequency of 0-80 kHz.

[0026] Preferably, the powder collecting system comprises a hydrogen tank, a heating device, an insulating plate, a pressure detecting device and a temperature detecting device.

[0027] The detecting device and the temperature detecting device are connected to the intelligent control system.

[0028] The present application has the following advantages:

[0029] 1. The intelligent control system controls the temperature of the melting system, the ultrasonic frequency, the cooling temperature, the fan, the cooling water, the chamber temperature, the air pressure and the vacuum degree, so as to balance and stabilize the system, and improve the working efficiency and the powder output of the whole powdering device.

[0030] 2. The fan is connected to the small hole of the ultrasonic chamber, and continuously works in the chamber, so as to prevent the powder from adhering to the wall during the ultrasonic powdering, ensure the uniformity of the metal powder, and improve the efficiency and quality of the collected powder.

[0031] 3. The hydrogenation device is added to the powdering device, so as to ensure the safety of the whole system and the purity of the powder, and obtain magnesium powder or magnesium hydride powder. BRIEF DESCRIPTION OF DRAWINGS

[0032] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of the provided drawings.

[0033] Figure 1 It is a structural schematic perspective view of the device of the present application;

[0034] Figure 2 It is a structural schematic side view of the device of the present application;

[0035] Figure 3 It is a structural schematic front view of the device of the present application;

[0036] Figure 4 It is a structural schematic sectional view of the device of the present application.

[0037] Figures 1-4The device comprises a smelting system 1, an ultrasonic atomization system 2, a powder collecting system 5, an intelligent control system 3 and a gas replacement system 4. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present application.

[0039] According to the drawings, Figures 1-4 The device for preparing micron-sized spherical powder comprises, in sequence according to the material flow direction, a smelting system 1, an ultrasonic atomization system 2 and a powder collecting system 5.

[0040] The device further comprises an intelligent control system 3 and a gas replacement system 4.

[0041] The gas replacement system 4 is connected with the ultrasonic atomization system 2.

[0042] The intelligent control system 3 is connected with the smelting system 1, the ultrasonic atomization system 2, the powder collecting system 5 and the gas replacement system 4, respectively.

[0043] In order to further optimize the above technical solution, the smelting system 1 comprises, in sequence, a feeding pipe 11, a smelting furnace 12, a solution collecting tank 13 and a discharging pipe 14; the discharging pipe 14 is connected with the ultrasonic atomization system 2.

[0044] The device further comprises a temperature sensing element, which is located in the smelting furnace 12 and connected with the intelligent control system 3.

[0045] In order to further optimize the above technical solution, the ultrasonic atomization system 2 comprises a bin body 21, an ultrasonic vibration rod 22, a fan 23, a cooling liquid system 24 and a conical discharging barrel 25.

[0046] The bin body 21 comprises an outer shell 211 and an inner container 212, a plurality of inclined downward small holes 213 are arranged on the four walls of the inner container, an air chamber is formed between the outer shell and the inner container, the space in the inner container is an ultrasonic chamber, and the fan is communicated with the chamber formed by the outer shell and the inner container.

[0047] The smelting system discharging pipeline 14 is connected with the ultrasonic chamber;

[0048] The ultrasonic vibration rod 22, the fan 23 and the conical discharging barrel 25 are respectively connected with the ultrasonic chamber;

[0049] The conical discharging barrel 25 is wrapped with the cooling liquid system 24;

[0050] The ultrasonic vibration rod 22, the fan 23 and the cooling liquid system 24 are respectively connected with the intelligent control system 3.

[0051] The small holes on the four walls of the inner container have a diameter of 2-3 mm and an angle of 30-60° with the horizontal; the small holes 213 on the four walls of the inner container can make the powder quickly form and have a more uniform particle size through the air of the fan.

[0052] In order to further optimize the above technical solution, the cooling liquid system 24 comprises a cooling liquid tank 241, a cooling liquid pipeline 242, a cooling liquid control valve 243 and a cooling liquid temporary storage chamber 244 connected in sequence; the cooling liquid temporary storage chamber 244 wraps the outer wall of the lower part of the chamber body 21;

[0053] The cooling liquid control valve 243 is connected with the intelligent control system 3.

[0054] In order to further optimize the above technical solution, the gas replacement system 4 comprises a vacuum pump 41, an expansion cavity 42, an inert gas cylinder 43 and a gas pipeline 44;

[0055] The gas pipeline 44 is provided with gas passage control valves 81, 82, 83, 84 and 85,

[0056] The vacuum pump 41, the expansion cavity 42 and the inert gas cylinder 43 are respectively connected with the ultrasonic chamber 21; the inert gas cylinder 43 is also connected with the smelting furnace 12 of the smelting system;

[0057] The vacuum pump 41 is connected with the intelligent control system 3.

[0058] In order to further optimize the above technical solution, the frequency of the ultrasonic vibration rod 22 is 0-80 kHz.

[0059] In order to further optimize the above technical solution, the powder collecting system 5 is internally provided with hydrogen and heated as a hydrogenation system; the powder collecting system 5 comprises a hydrogen cylinder 51, a heating device 52, a heat insulation plate 53, a pressure detection device 54 and a temperature detection device 55.

[0060] The detection device 54 and the temperature detection device 55 are respectively connected with the intelligent control system.

[0061] Working principle

[0062] The magnesium plate or magnesium ingot is put into the smelting furnace, then the smelting furnace cover is sealed, the sealing of the smelting system is ensured, the airway control valves 81, 82 and 83 are opened, the whole system is filled with argon atmosphere, then the airway control valves 81, 82 and 83 are closed, the airway control valves 84 and 85 are opened, the above steps are repeated several times, and air in the whole device is exhausted;

[0063] Next, the airway control valves 81 and 82 are opened, the airway control valves 84 and 85 are opened, and the whole device is in normal pressure state, the inert gas cylinder 43 and the gas pipeline 44 are used for inputting the protective gas of the smelting system, and then the smelted magnesium liquid is introduced into the ultrasonic chamber through the smelting liquid pipeline;

[0064] When the liquid drops fall downward after ultrasonic completion, the airway control valve 82 is opened, then the ultrasonic vibration rod 22 is opened, and the intelligent control system 3 is used for controlling the frequency of ultrasonic vibration so as to control the particle size of the metal liquid drops.

[0065] When the metal liquid drops fall, the fan is opened, the argon in the device is blown downward through the fan blowing port, the metal liquid drops are blown downward, the cooling liquid control valve is opened, the cooling liquid is introduced into the cooling liquid temporary storage chamber through the cooling liquid pipeline, the metal liquid drops are quickly condensed into metal small particles when falling, and then the metal particles fall into the powder collecting box after falling in the conical discharge barrel.

[0066] If magnesium hydride powder is needed, the vacuum pump 41 is used to make the whole device in vacuum state, then the cover plate 53 is closed, the airway control valve 86 is opened, the hydrogen cylinder 51 is used to charge hydrogen into the powder collecting box 5, the required pressure is reached, then the heating device 52 is opened, the powder collecting box 5 is hydrogenated at the required pressure, and during the period, the pressure detection device 54 and the temperature detection device 55 are operated to detect the pressure and temperature of the powder collecting box 5.

[0067] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An apparatus for producing a microspherical powder, characterized by comprising: The system comprises a melting system, an ultrasonic atomization system and a powder collecting system connected in sequence according to the material flow direction; The system further comprises an intelligent control system and a gas replacement system; The gas replacement system is connected with the ultrasonic atomization system; The intelligent control system is connected with the melting system, the ultrasonic atomization system, the powder collecting system and the gas replacement system respectively.

2. The apparatus for producing a microsized spherical powder according to claim 1, wherein The melting system comprises a feeding pipe, a melting furnace, a solution collecting tank and a discharging pipe connected in sequence; the discharging pipe is connected with the ultrasonic atomization system; The system further comprises a temperature sensing element located in the melting furnace and connected with the intelligent control system.

3. The apparatus for producing a microsized spherical powder according to claim 1, wherein The ultrasonic atomization system comprises a bin body, an ultrasonic vibration rod, a fan, a cooling liquid system and a conical discharging barrel; The bin body comprises an outer shell and an inner container, the four walls of the inner container are provided with a plurality of downwardly inclined small holes, a wind chamber is formed between the outer shell and the inner container, the space in the inner container is an ultrasonic bin chamber, the fan communicates with the cavity formed by the outer shell and the inner container; The melting system is connected with the ultrasonic bin chamber; The ultrasonic vibration rod, the fan and the conical discharging barrel are connected with the ultrasonic bin chamber respectively; The lower outer wall of the bin body is in contact with the cooling liquid in the cooling liquid system; The ultrasonic vibration rod, the fan and the cooling liquid system are connected with the intelligent control system respectively.

4. The apparatus for producing a microsized spherical powder according to claim 3, wherein The diameters of the small holes in the four walls of the inner container are 2-3 mm, and the downwardly inclined angle is 30-60° with the horizontal.

5. The apparatus for producing a microsized spherical powder according to claim 3, wherein The cooling liquid system comprises a cooling liquid tank, a cooling liquid pipe, a cooling liquid control valve and a cooling liquid temporary storage chamber connected in sequence; the cooling liquid temporary storage chamber wraps the outer wall of the lower part of the bin body; The cooling liquid control valve is connected with the intelligent control system.

6. The apparatus for producing a microsized spherical powder according to claim 3, wherein The gas replacement system comprises a vacuum pump, an expansion cavity and an inert gas cylinder; The inert gas cylinder is connected with the bin body and the melting system respectively; the inlet and outlet of the vacuum pump are connected with the bin body and the expansion cavity respectively; The vacuum pump is connected with the intelligent control system.

7. The apparatus for producing microsized spherical powder according to claim 3, wherein The control frequency of the ultrasonic vibration rod is 0-80 kHz.

8. A device for producing micron-sized spherical powder according to any one of claims 1 to 7, characterized in that, The powder collecting system comprises a hydrogen cylinder, a heating device, an insulating plate, a pressure detection device and a temperature detection device; The detection devices and the temperature detection device are connected with the intelligent control system.

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