CN209935864U - Spherical fine metal powder production system - Google Patents
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- CN209935864U CN209935864U CN201920684877.5U CN201920684877U CN209935864U CN 209935864 U CN209935864 U CN 209935864U CN 201920684877 U CN201920684877 U CN 201920684877U CN 209935864 U CN209935864 U CN 209935864U
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Abstract
The utility model provides a spherical superfine metal powder production system, which comprises a vacuum atomization tower, a plasma arc torch arranged above the vacuum atomization tower and a feeding device, wherein metal raw materials are fed in the direction vertical to the center line of the plasma arc torch, and the feeding position is the central point of a nozzle; the ceramic hopper is arranged right below the feeding position of the feeding device; the atomizing disc is arranged in the vacuum atomizing tower, and the lower part of the ceramic funnel is arranged at a feed inlet of the atomizing disc; the powder collecting tank is arranged at the bottom of the vacuum atomizing tower; a filter tank communicated with the lower part of the vacuum atomization tower and an inert gas circulating system. The utility model discloses an adopt and shift arc plasma arc torch and provide the higher heating heat source of energy density and temperature for the metal feedstock atomizing, the position and the structure of cooperation ceramic funnel and atomizing disk set up characteristics simultaneously, solved prior art high melting point metal and be difficult to melt, be difficult to refine, the not high and big technical problem of particle diameter of powder sphericity.
Description
Technical Field
The utility model relates to a new material powder production field, concretely relates to spherical fine metal powder production system and method.
Background
The superfine metal powder (especially below 10 microns) is a functional basic powder material with high technological content and high added value, is one of hot products which are developed fastest in the field of materials, and has wide application in the fields of chip multilayer ceramic capacitors, surface packaging, PCB (printed circuit board), high-performance conductive materials, wave-absorbing shielding materials, high-efficiency catalysts, sintering additives, metal and nonmetal conductive coating treatment and the like.
Many methods have been reported for the preparation of fine metal powder, and there are a gas phase method, a liquid phase method and a solid phase method according to the difference of reaction system. The liquid phase method (also called solution reaction method) is a method for synthesizing high-purity ultrafine powder which is widely used in laboratories and industries at present, and has the main advantages of accurate control of chemical composition, easy addition of trace effective components, easy control of shape and size of ultrafine particles, and utilization of various refining means in the reaction process. The solid phase method mainly adopts a mechanical method (also called a crushing method) at present, and the solid phase method adopts a grinding or airflow and ultrasonic method to crush and refine blocks so as to obtain ultrafine particles with different particle size ranges. The mechanical method has low cost and large yield, and has the defects that the fineness, the purity and the form of the powder are limited by equipment and a process, and very fine and high-purity particles cannot be obtained. The gas phase method generally refers to a method of using a gas raw material or evaporating a raw material into a gas and then regenerating ultrafine particles by a chemical reaction or a physical action. Such methods include gas phase chemical reaction, laser synthesis, electric explosion, and inert gas condensation. The gas phase method for preparing metal ultrafine particles has the characteristics of high product purity, good dispersibility, narrow particle size distribution and small particle size, but has the defects of low yield and high mass production cost.
Plasma is a fourth mode that substances except solid, liquid and gaseous exist, gas is continuously heated and ionized to form a high-energy gas state consisting of ions, electrons and neutral particles, and the high-energy gas state is called plasma, and the high-temperature (5000-.
Chinese utility model patent 2016202349628 discloses a device for preparing high-performance powder for additive manufacturing by plasma atomization, which comprises a vacuum system, a vacuum atomization tower, an argon storage tank, a plasma generator, a roller type metal coiled wire conveying system, a gas-powder separation device, a vibrating type powder blanking device, a powder collection device and a gas purification recycling device; the vacuum system is communicated with the side wall of the vacuum atomization tower; the plasma generator is arranged at the top of the vacuum atomization tower; the gas powder separation device is arranged in the vacuum atomization tower and is connected with the gas purification recycling device; the gas purification recycling device is connected with an argon gas supply pipe; the vibrating powder blanking device is arranged on the inner wall below the vacuum atomization tower. The device for preparing the high-performance powder for additive manufacturing by plasma atomization has a simple structure and is convenient to use, and the vibrating powder blanking device is adopted, so that the accumulation of metal materials below a vacuum atomization tower after the metal materials are atomized into ultrafine powder by plasma is avoided; the plasma atomization efficiency of the metal material in the vacuum environment is high. However, the non-transferred arc plasma generator adopted in the technical scheme is not suitable for preparing high-melting-point metal powder, the air inlet of cooling gas for metal atomization is arranged at the bottom of the vacuum atomization tower, molten metal droplets move to the bottom of the vacuum atomization tower under the action of gravity to perform heat exchange, cooling and solidification to form ultrafine powder particles, and the temperature of the metal droplets is gradually reduced due to the heat exchange generated in the falling process of the metal droplets under the action of gravity, so that the sphericity of the metal droplets is poor, the surface of the metal droplets is not smooth, the prepared powder has large and irregular particle size, and the particle size range of the formed powder is large.
SUMMERY OF THE UTILITY MODEL
To above problem, the utility model provides a spherical fine metal powder production system, the utility model discloses an adopt and shift arc plasma arc torch and provide the higher heating heat source of energy density and temperature for the metal feedstock atomizing, the position and the structure of cooperation ceramic funnel and atomizing disk set up characteristics simultaneously, shorten the distance that shifts arc plasma arc torch nozzle to vacuum atomization district greatly, make the metal liquid after shifting arc plasma arc torch melting under ceramic funnel water conservancy diversion heat preservation effect, it is broken into fine metal powder through atomizing disk and rapid cooling in the atomization district fast, it has the sphericity height, the surface is bright and clean good, the particle diameter is little, impurity content hangs down and output great advantage such as, it is difficult to melt to have solved prior art high melting point metal, be difficult to refine, the not high and big technical problem of particle diameter of powder sphericity.
In order to achieve the above object, the utility model provides a following technical scheme:
the utility model provides a spherical fine metal powder production system, includes the vacuum atomization tower, installs the plasma arc torch in vacuum atomization tower top, its characterized in that still includes:
the feeding device feeds metal raw materials in a direction perpendicular to the central line of the plasma arc torch, and the feeding position is the central point of the nozzle;
the ceramic hopper is arranged right below the feeding position of the feeding device;
the atomizing disc is arranged inside the vacuum atomizing tower, and the lower part of the ceramic funnel is arranged at a feed inlet of the atomizing disc;
the powder collecting tank is communicated and arranged at the bottom of the vacuum atomization tower;
the filter tank is communicated with the lower part of the vacuum atomization tower through a gas pipeline a, and a gas filter assembly is arranged in the filter tank; and
and the inert gas circulation system comprises a blower, a gas storage tank and a gas compressor which are communicated in sequence, wherein the blower is communicated with a gas outlet of the filter tank through a gas pipeline b, the inert gas filtered by the filter tank is introduced into the gas storage tank through the blower and is conveyed into the atomizing disc through a gas pipeline c after being compressed by the gas compressor, and a high-speed gas flow is formed at a discharge port of the atomizing disc to rapidly crush and cool the molten metal liquid to form the fine metal powder with the particle size of 1-15 mu m.
As the improvement, atomizing disk is the cone, its inside annular equipartition have a plurality of with the trachea of gas pipeline c intercommunication, the annular shape of arranging is unanimous with atomizing disk's appearance, and the axis contained angle of trachea and atomizing disk is alpha, and alpha is 20 ~ 75.
As a modification, the nozzle of the plasma arc torch is positioned right above the central position of the ceramic funnel; the gas pipeline a is obliquely arranged, and the end part position of the gas pipeline a connected with the filter tank is higher than the end part position of the gas pipeline a connected with the vacuum atomization tower.
As an improvement, the gas filtering component comprises a filtering net which is arranged on the upper part of the filtering tank and is matched with the inner size of the filtering net, and a plurality of filtering belts which are vertically and uniformly distributed below the filtering net, wherein the filtering net is positioned below the gas outlet of the filtering tank.
As a further improvement, a heat exchange device is further arranged between the air blower and the air storage tank, the vacuum atomization tower, the powder collecting tank, the filtering tank, the heat exchange device and the connecting pipeline are all provided with water interlayers, and cooling water is introduced into the water interlayers.
As a further improvement, the plasma arc torch is a transferred arc plasma arc torch, and the gas for generating the transferred arc plasma is one or a mixture of nitrogen, argon or hydrogen.
As a further improvement, the plasma arc torch comprises an upper outer sleeve, a lower outer sleeve sleeved below the upper outer sleeve, a cathode and a nozzle arranged at the end part of the lower outer sleeve, wherein an arc torch water inlet pipe, an arc torch water return pipe and an air inlet pipe are sequentially arranged inside the upper outer sleeve from inside to outside and extend to the inside of the lower outer sleeve; the cathode is arranged on the lower end part of the arc torch water return pipe and is positioned above the nozzle; the end part of the air inlet pipe is communicated with the nozzle; the lower outer sleeve is also provided with an outer sleeve water inlet pipe and an outer sleeve water return pipe which are arranged outside the air inlet pipe.
As a further improvement, an insulating sealing sleeve is further arranged in the upper outer sleeve, is sleeved outside the arc torch water return pipe and is arranged at the upper end of the air inlet pipe; and a metal sealing ring is also arranged between the lower end part of the arc torch water return pipe and the cathode.
Compared with the prior art, the utility model has the advantages of it is following showing and beneficial effect:
1) the utility model discloses a transfer arc plasma arc torch melts the metal as the heating source, and metal rod or wire rod are as the positive pole of electrode, and its energy density is high (energy density can reach 105 ~ 106W/cm2), and the temperature is high (arc column central temperature 10000 ~ 30000K), and flame speed is big (can reach 300 ~ 800m/s) etc. can melt the metal in the twinkling of an eye, and furthest improves the superheat degree of molten metal liquid, is applicable to the production low melting point and high melting point metal powder, and output and farine yield are high;
2) the utility model discloses through setting up ceramic funnel and atomizing disk under the transfer arc plasma arc torch, shorten the distance of transfer arc plasma arc torch nozzle to vacuum atomization district greatly, utilize ceramic funnel water conservancy diversion heat preservation effect simultaneously, reduce the temperature drop before the metallic liquid after the melting of transfer arc plasma arc torch gets into the vacuum atomization district, ensure follow-up powder shaping appearance quality, and utilize the structural setting of atomizing disk, make the metallic liquid strike dispersion atomizing cooling by the high-speed inert gas flow of bunch form through atomizing disk discharge gate and break into fine metal powder, the method has combined the super high temperature of transfer arc plasma arc torch, the high and gas atomization method cooling rate of molten metal liquid superheat degree is fast, advantages such as sphericity is good, can produce various metal and alloy powder of particle size 1 ~ 15 mu m;
to sum up, the utility model discloses extensive applicability, the vast majority particle diameter of the metal powder of production can be controlled between 1 ~ 15 microns, and output is big (10 ~ 30kg/h), and the sphericity is high, and the surface is bright and clean, and impurity content is low, and the dispersibility is good, and advantages such as price is moderate do, can realize large-scale industrial production.
Drawings
FIG. 1 is a schematic view of the whole production system of the present invention;
fig. 2 is one of the schematic internal structural diagrams of the atomizing disk of the present invention;
FIG. 3 is a second schematic view of the internal structure of the atomizing plate according to the present invention;
FIG. 4 is a schematic view of the internal structure of a plasma arc torch according to the present invention;
FIG. 5 is a flow chart of the production process of the present invention;
FIG. 6 is an electron microscope image of 1.0 μm nickel powder produced in example IV of the present invention;
fig. 7 is an electron microscope image of 3.0 micron stainless steel powder produced in example five 1 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
Example one
As shown in fig. 1 to 3, the utility model provides a spherical fine metal powder production system, including vacuum atomization tower 1, install plasma arc torch 2 in vacuum atomization tower 1 top, still include:
a feeding device 3 for feeding a metal raw material in a direction perpendicular to a center line of the plasma arc torch 2, wherein a feeding position 31 is a central point of a nozzle 20 of the plasma arc torch 2; preferably, the metal raw material is in the shape of a bar or a wire, and is fed manually or automatically by a clamping device;
a ceramic hopper 4 disposed just below a feed position 31 of the feeding device 3;
the atomizing disc 5 is arranged inside the vacuum atomizing tower 1, and the lower part of the ceramic funnel 4 is arranged at a feed port 51 of the atomizing disc 5;
the powder collecting tank 6 is communicated and arranged at the bottom of the vacuum atomizing tower 1;
a filter tank 7 which is communicated with the lower part of the vacuum atomization tower 1 through a gas pipeline a8 and is internally provided with a gas filter assembly 71;
and the inert gas circulation system 9 comprises a blower 91, a gas storage tank 92 and a gas compressor 93 which are sequentially communicated, wherein the blower 91 is communicated with the gas outlet 72 of the filter tank 7 through a gas pipeline b94, the inert gas filtered by the filter tank 7 is introduced into the gas storage tank 92 through the blower 91, is compressed by the gas compressor 93, is conveyed into the atomizing disk 5 through a gas pipeline c95, forms high-speed airflow at the discharge port 52 of the atomizing disk 5, and rapidly crushes and cools the molten metal liquid to form fine metal powder with the particle size of 1-15 mu m.
It should be noted that, as shown in fig. 2 and 3, the atomizing disk 5 is a conical body, a plurality of air pipes 83 communicated with the air pipe c95 are annularly and uniformly distributed in the atomizing disk 5, the annular arrangement shape is consistent with the external shape of the atomizing disk 5, preferably, an annular air passage 84 communicated with the air pipes 83 is formed above the upper end of the air pipe 83 of the atomizing disk 5, the air outlet end of the air pipe c95 is communicated with the annular air passage 84, and the inert gas is introduced into the annular air passage 84 of the atomizing disk 5 through the air pipe c95 and synchronously enters the corresponding air pipe 83c, so as to ensure that the flow rates of the gas in the air pipes are consistent.
Wherein, the axis contained angle of trachea 83 and atomizing disk 5 is 20 ~ 75 for the air current through a plurality of trachea 83 injection realizes alternately, improves metal liquid dispersion atomization effect, improves metal powder shaping quality. In addition, the atomizing disk 5 forms a high-speed air flow region, i.e., a vacuum atomizing area 55, at the air outlets of the plurality of air tubes 83.
In this embodiment, the nozzle 20 of the plasma arc torch 2 is positioned directly above the center of the ceramic funnel 4; gas pipeline a8 is the slope setting, and its with the tip position that the filter tank 7 is connected is higher than its with the tip position that vacuum atomization tower 1 is connected, in addition, gas pipeline a8 with the tip position that the filter tank 7 is connected sets up the below position at filter tank 7, improves gas filtration purifying effect on the one hand, and on the other hand plays the effect of preliminary settlement through gas pipeline a8 for the powder that subsides in the gas pipeline a8 can fall into in the powder collecting tank 6 automatically.
As an improvement, the gas filtering component 71 includes a filtering net 711 mounted on the upper portion of the filtering tank 7 and adapted to the inner size of the filtering tank, and a plurality of filtering belts 712 vertically and uniformly distributed below the filtering net 711, wherein the filtering net 711 is located below the gas outlet 72 of the filtering tank 7, so as to improve the gas filtering and purifying effect.
In addition, a heat exchange device 96 is further arranged between the blower 91 and the air storage tank 92, and the vacuum atomization tower 1, the powder collection tank 6, the filter tank 7, the heat exchange device 96 and the connecting pipeline are all provided with water interlayers into which cooling water is introduced.
Example two
As shown in fig. 4, wherein the same or corresponding components as in the first embodiment are denoted by the same reference numerals as in the first embodiment, only the points of difference from the first embodiment will be described below for the sake of convenience. The second embodiment is different from the first embodiment in that: in this embodiment, the plasma arc torch 2 comprises an upper outer sleeve 21, a lower outer sleeve 22 sleeved below the upper outer sleeve 21, a cathode 23 and a nozzle 20 arranged at the end of the lower outer sleeve 22, wherein a torch water inlet pipe 24, a torch water return pipe 25 and a gas inlet pipe 26 are sequentially arranged inside the upper outer sleeve 21 from inside to outside and extend to the inside of the lower outer sleeve 22; the cathode 23 is arranged on the lower end part of the arc torch water return pipe 25 and is positioned above the nozzle 20; the end of the intake pipe 26 communicates with the nozzle 20; the lower outer cover 22 is further provided with an outer cover water inlet pipe 27 and an outer cover water return pipe 28, which are arranged outside the air inlet pipe 26.
In addition, an insulating sealing sleeve 211 is further arranged in the upper outer sleeve 21, and the insulating sealing sleeve 211 is sleeved outside the arc torch water return pipe 25 and is arranged at the upper end of the air inlet pipe 26; a metal sealing ring 251 is also arranged between the lower end part of the arc torch water return pipe 25 and the cathode 23.
The utility model provides a plasma arc torch 2 adopts the structure of interior overcoat and carries out inside and outside cooling mode to the arc square, its simple structure, and the maintenance of being convenient for and cooling effect are good, improve the life of plasma arc square greatly.
It is worth mentioning that the plasma arc torch 2 is a transferred arc plasma arc torch 2, the gas for generating the transferred arc plasma is one or a mixture of nitrogen, argon or hydrogen, in this embodiment, the metal raw material is used as the positive electrode of the electrode, the transferred arc plasma arc torch can directly transfer more generated energy to the metal raw material, and the energy density is high (the energy density can reach 10)5～106W/cm2) The temperature is high (the central temperature of the arc column is 10000-30000K), the flame flow speed is high (can reach 300-800 m/s), and the like, so that the metal can be instantly melted, the superheat degree of the molten metal liquid is improved to the maximum extent, and meanwhile, the problems that the high-melting-point metal is difficult to melt and refine are solved by combining the arrangement and the structural characteristics of the ceramic funnel 4 and the atomizing disk 5.
EXAMPLE III
As shown in fig. 5, the utility model also provides a spherical fine metal powder production method, including the spherical fine metal powder production system in above-mentioned technical scheme, this production method's specific production flow is as follows:
(1) after the tightness of the system is checked, opening a fresh inert gas valve, opening a blower 91, opening a gas compressor 93, opening gas valves of all gas pipes 83 on the atomizing disc 5, enabling high-speed inert gas flow to enter the atomizing disc 5, and then simultaneously starting the feeding device 3 and the plasma arc torch 2;
(2) under the action of the plasma arc torch 2, molten metal liquid flows into the ceramic funnel 4, is guided by the ceramic funnel 4 and enters an atomization area, under the action of high-speed airflow of inert gas, the metal liquid is rapidly crushed and cooled to form fine metal powder, the fine metal powder falls into the powder collecting tank 6 to be collected, part of the powder flows into the filtering tank 7 along with the airflow, and the filtered inert gas is recycled through the inert gas circulation system 9.
The inert gas for high-speed airflow atomization is nitrogen or argon, and the pressure is 5-20 MPa.
Example four
As shown in fig. 6, the nickel powder of 1.0 μm is prepared by the production systems and methods of examples one to three, and the specific steps are as follows:
placing a nickel rod raw material, placing the nickel rod raw material at the central position of a transferred plasma arc moment, opening a fresh inert gas valve after checking the tightness of a system, filling the system with inert gas, opening an air blower 91, opening a gas compressor 93, opening an atomizing disc 5 for high-pressure air inlet, controlling the pressure at 15MPa, circulating the inert gas in the system, and opening the inert gas for cooling, wherein the pressure is controlled at 0.5MPa, the flow is 150m3/And h, simultaneously starting the feeding device 3 and transferring the plasma arc moment, controlling the feeding speed to be 12-15 kg/h, and controlling the power of the transferring plasma arc moment to be 80 kw.
Under the effect of transferring arc transfer plasma arc moment, the nickel rod melts in the twinkling of an eye, and high temperature metal liquid gets into vacuum atomization district 55 through the drainage of ceramic funnel 4, and then crushing cooling becomes superfine powder, and most powder is stayed in the holding vessel, and only a small part of thinner powder is in filter tank 7 along with the air current, and the inert gas after the filtration circulates and gets into gas holder 92, recycles under the effect of gas compressor 93. And taking out the powder obtained in the collecting tank, and observing under an electron microscope.
EXAMPLE five
As shown in fig. 7, the production system and method of the first to third embodiments are used to prepare stainless steel powder of 3.0 μm, and the specific steps are as follows:
placing a stainless steel bar raw material, placing the stainless steel bar raw material at the central position of a transferred plasma arc moment, after checking the tightness of a system, opening a fresh inert gas valve to fill the system with inert gas, opening an air blower 91, opening a gas compressor 93, opening an atomizing disc 5 to perform high-pressure air inlet, controlling the pressure to be 10MPa, circulating the inert gas in the system, opening the inert gas for cooling, controlling the pressure to be 0.5MPa and the flow to be 150m3/h, then simultaneously starting a feeding device 3 and the transferred plasma arc moment, controlling the feeding speed to be 12-15 kg/h, and controlling the power of the transferred plasma arc moment to be 80 kw.
Under the effect of transferring arc transfer plasma arc moment, the stainless steel bar melts in the twinkling of an eye, and high temperature metal liquid gets into vacuum atomization district 55 through the drainage of ceramic funnel 4, and then crushing cooling becomes superfine powder, and most powder is stayed in the holding vessel, and only a small part of thinner powder is in filtering tank 7 along with the air current, and the inert gas after the filtration circulates and gets into gas holder 92, recycles under the effect of gas compressor 93. And taking out the powder obtained in the collecting tank, and observing under an electron microscope.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (8)
1. The utility model provides a spherical fine metal powder production system, includes vacuum atomization tower (1), installs plasma arc torch (2) in vacuum atomization tower (1) top, its characterized in that still includes:
a feeding device (3) which feeds the metal raw material (10) in a direction perpendicular to the center line of the plasma arc torch (2) and the feeding position (31) is the central point of the nozzle (20) of the plasma arc torch (2);
a ceramic hopper (4) arranged directly below a feed position (31) of the feeding device (3);
the atomizing disc (5) is arranged inside the vacuum atomizing tower (1), and the lower part of the ceramic funnel (4) is arranged at a feed port (51) of the atomizing disc (5);
the powder collecting tank (6) is communicated and installed at the bottom of the vacuum atomizing tower (1);
a filter tank (7) which is communicated with the lower part of the vacuum atomization tower (1) through a gas pipeline a (8) and is internally provided with a gas filter assembly (71); and
the inert gas circulation system (9) comprises a blower (91), a gas storage tank (92) and a gas compressor (93) which are communicated in sequence, wherein the blower (91) is communicated with a gas outlet (72) of the filter tank (7) through a gas pipeline b (94), the inert gas filtered by the filter tank (7) is introduced into the gas storage tank (92) through the blower (91), is compressed by the gas compressor (93), is conveyed into the atomizing disc (5) through a gas pipeline c (95), forms high-speed airflow at a discharge hole (52) of the atomizing disc (5), and rapidly crushes and cools the molten metal liquid to form fine metal powder with the particle size of 1-15 mu m.
2. The spherical fine metal powder production system according to claim 1, wherein the atomizing disk (5) is a conical body, a plurality of air pipes (53) communicated with the gas pipeline c (95) are annularly and uniformly distributed in the atomizing disk (5), the annular arrangement shape is consistent with the appearance of the atomizing disk (5), an included angle between the air pipes (53) and the axis of the atomizing disk (5) is alpha, and the alpha is 20-75 degrees.
3. A spherical fine metal powder production system according to claim 1, wherein the nozzle (20) of the plasma arc torch (2) is located directly above the center position of the ceramic funnel (4); the gas pipeline a (8) is obliquely arranged, and the end part position of the gas pipeline a (8) connected with the filter tank (7) is higher than the end part position of the gas pipeline a (8) connected with the vacuum atomization tower (1).
4. The spherical fine metal powder production system according to claim 1, wherein the gas filtering assembly (71) comprises a filtering net (711) which is installed on the upper part of the filtering tank (7) and is matched with the inner size of the filtering tank, and a plurality of filtering belts (712) which are vertically and uniformly distributed below the filtering net (711), and the filtering net (711) is positioned below the gas outlet (72) of the filtering tank (7).
5. The spherical fine metal powder production system according to claim 1, wherein a heat exchange device (96) is further arranged between the blower (91) and the gas storage tank (92), and the vacuum atomization tower (1), the powder collection tank (6), the filter tank (7), the heat exchange device (96) and the connecting pipeline are all provided with water interlayers into which cooling water is introduced.
6. Spherical fine metal powder production system according to claim 1, wherein the plasma arc torch (2) is a transferred arc plasma arc torch (2) and the gas generating the transferred arc plasma is one or a mixture of nitrogen, argon or hydrogen.
7. The spherical fine metal powder production system according to claim 6, wherein the plasma arc torch (2) comprises an upper outer sleeve (21), a lower outer sleeve (22) sleeved below the upper outer sleeve (21), a cathode (23) and a nozzle (20) arranged at the end of the lower outer sleeve (22), wherein a torch water inlet pipe (24), a torch water return pipe (25) and a gas inlet pipe (26) are sequentially arranged inside the upper outer sleeve (21) from inside to outside, and all extend to the inside of the lower outer sleeve (22); the cathode (23) is arranged on the lower end part of the arc torch water return pipe (25) and is positioned above the nozzle (20); the end of the air inlet pipe (26) is communicated with the nozzle (20); the lower outer sleeve (22) is also provided with an outer sleeve water inlet pipe (27) and an outer sleeve water return pipe (28) which are arranged outside the air inlet pipe (26).
8. The spherical fine metal powder production system according to claim 7, wherein an insulating sealing sleeve (211) is further arranged in the upper outer sleeve (21), and the insulating sealing sleeve (211) is sleeved outside the arc torch water return pipe (25) and is arranged at the upper end of the air inlet pipe (26); and a metal sealing ring (251) is also arranged between the lower end part of the arc torch water return pipe (25) and the cathode (23).
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967755A (en) * | 2019-05-14 | 2019-07-05 | 湖州恒合科技有限公司 | A kind of spherical shape fine metal powder production system and its method |
| CN112169625A (en) * | 2020-09-09 | 2021-01-05 | 江西澳科新材料科技有限公司 | Tungsten alloy banburying device |
| KR102359664B1 (en) * | 2020-12-17 | 2022-02-09 | (주)아이작리서치 | Atomizer coupled powder processing apparatus |
-
2019
- 2019-05-14 CN CN201920684877.5U patent/CN209935864U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109967755A (en) * | 2019-05-14 | 2019-07-05 | 湖州恒合科技有限公司 | A kind of spherical shape fine metal powder production system and its method |
| CN109967755B (en) * | 2019-05-14 | 2023-08-18 | 湖州恒合科技有限公司 | Spherical fine metal powder production system and method thereof |
| CN112169625A (en) * | 2020-09-09 | 2021-01-05 | 江西澳科新材料科技有限公司 | Tungsten alloy banburying device |
| KR102359664B1 (en) * | 2020-12-17 | 2022-02-09 | (주)아이작리서치 | Atomizer coupled powder processing apparatus |
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Effective date of registration: 20211227 Address after: 311241 first and second floors of building 4, No. 369, kanshan Road, Guali Town, Xiaoshan District, Hangzhou City, Zhejiang Province Patentee after: Hangzhou Xinchuan New Material Co.,Ltd. Address before: 313100 Industrial Zone, Si an town, Changxing County, Huzhou, Zhejiang Patentee before: Huzhou Henghe Technology Co.,Ltd. |