CN110899709A - Powder spheroidizing furnace and using method thereof - Google Patents
Powder spheroidizing furnace and using method thereof Download PDFInfo
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- CN110899709A CN110899709A CN201911199055.9A CN201911199055A CN110899709A CN 110899709 A CN110899709 A CN 110899709A CN 201911199055 A CN201911199055 A CN 201911199055A CN 110899709 A CN110899709 A CN 110899709A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
- B22F2009/065—Melting inside a liquid, e.g. making spherical balls
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Abstract
The invention discloses a powder spheroidizing furnace, which comprises an automatic powder feeder, a double-heating-zone vertical tube furnace and a spherical powder collector which are sequentially communicated from top to bottom. The invention provides a powder spheroidizing furnace, which utilizes high temperature to preheat sample powder, then carries out surface micro-melting, and finally realizes spheroidizing shaping under the action of gravity and surface tension, thereby solving the problems of low spheroidizing efficiency, larger granularity, low purity, high oxygen content and the like of a powder spheroidizing device in the prior art; the invention provides a using method of a powder spheroidizing furnace, and provides a basis for the use of the powder spheroidizing furnace through the design of the using method.
Description
Technical Field
The invention belongs to the technical field of powder metallurgy, and particularly relates to a powder spheroidizing furnace and a using method thereof.
Background
Conventional powder has been widely used in the fields of aviation, aerospace, energy, petrochemistry, medicine, etc., while spherical powder has its unique advantages in application, in the aspect of 3D metal powder additive manufacturing: the sphericity is high, the fluidity is good, and the performance of the prepared section bar is better; in the aspect of the battery: compared with the shapes of other anode and cathode materials, the anode and cathode after the materials are sphericized have higher apparent density and tap density, so that the energy density of the battery can be improved, and the lithium ion transmission process is more uniform due to the isotropy of the spheres, so that the performance of the battery can be improved; preparing a novel ceramic/composite functional material device: the spherical material has strong fluidity, and the ceramic material or the composite material prepared by sintering has higher density, more uniformity and better performance.
How to prepare spherical powder with good sphericity, high surface smoothness, low gas content and high purity is an urgent problem to be solved, and common methods for increasing the sphericity of the powder include an atomization method, a plasma rotation method, a mechanical ball milling method and the like.
The high-pressure gas atomization method is to use high-pressure gas as an atomization medium to break continuous molten metal fine flow to produce metal powder, but the device is expensive, the product has different spherical sizes, and the yield of powder with fine particle size is low. Centrifugal atomization is a powder-making method in which a metal liquid flow is broken into small droplets by using centrifugal force caused by mechanical rotation and then solidified into solid powder, but in the method, the powder is easily oxidized and has poor sphericity. The ultrasonic gas atomization method is that a high-speed gas flow impacts a liquid metal flow at a frequency of 80-100KHz and a high speed of 2-2.5 mach to atomize the liquid metal flow into small droplets and then solidify into powder, but the equipment design is complicated and the cost is high. The water atomization method is used for preparing spherical metal powder, but the equipment is large, the manufacturing cost is high, the energy consumption is high, more raw materials are needed, generally more than 1kg, the water atomization method is not suitable for exploring new materials and is not suitable for scientific research workers. The plasma rotating method is to rotate uranium plasma generated at high temperature at high speed in an electromagnetic field to produce metal powder, and has the problems of high cost, complex equipment design, low sphericity, easy agglomeration, uneven heating, low spheroidizing efficiency, difficulty in batch production and the like. The powder prepared by the mechanical ball milling method is usually irregular, has more defects, can not maintain the shape and has non-uniform components. Therefore, there is a need for improvements in the prior art.
Disclosure of Invention
The invention aims to overcome the problems in the prior art, and provides a powder spheroidizing furnace, which utilizes high temperature to preheat sample powder, then carries out surface micro-melting, and finally realizes spheroidizing shaping under the action of gravity and surface tension, so that the problems of low spheroidizing efficiency, large granularity, low purity, high oxygen content and the like of a powder spheroidizing device in the prior art are solved, and the powder spheroidizing furnace can be used for exploration experiments of a small amount of novel materials and can also be used for spheroidizing in mass production; the invention provides a using method of a powder spheroidizing furnace, and provides a basis for the use of the powder spheroidizing furnace through the design of the using method.
In order to achieve the technical purpose and achieve the technical effect, the invention is realized by the following technical scheme:
a powder spheroidizing furnace comprises an automatic powder feeder, a double-heating-zone vertical tube furnace and a spherical powder collector which are sequentially communicated from top to bottom;
the automatic powder feeder comprises a feeding funnel and a powder feeding regulator fixedly communicated below the feeding funnel, and the left side of the powder feeding regulator is communicated with a screw type feeding channel;
the double-heating-zone vertical tube furnace comprises a heating furnace body and a molybdenum tube arranged in the heating furnace body, wherein the upper end and the lower end of the heating furnace body are respectively communicated with a first sealing platform and a second sealing platform, an upper end flange is communicated above the first sealing platform, one end of the molybdenum tube penetrating through the first sealing platform is communicated with the upper end flange, the right side of the upper end flange is communicated with a screw rod type feeding channel, and a precise needle valve and a vacuum pressure gauge are arranged on the upper end flange;
the heating furnace is characterized in that a heating furnace temperature control plate is arranged on the right side of the heating furnace body, and a first temperature adjusting knob and a second temperature adjusting knob are sequentially arranged on the front side surface of the heating furnace temperature control plate from top to bottom;
the spherical powder collector comprises a collecting protection cover and a lower end flange placed in the collecting protection cover, and one end of the molybdenum pipe penetrating through the second sealing platform is communicated with the lower end flange;
the side face of the lower end flange is provided with a vacuum port, the edge of the lower bottom face of the lower end flange is communicated with a material receiving port, the lower bottom face of the lower end flange is communicated with a gas path pipeline, and one end of the gas path pipeline, which penetrates through the collecting protective cover, is communicated with a gas path controller.
Furthermore, the front side surface of the powder supply regulator is electrically connected with a speed regulation knob.
Further, a first heating zone is formed in the heating furnace body, a second heating zone is formed in the molybdenum tube, the first temperature adjusting knob is used for adjusting the temperature in the first heating zone, and the second temperature adjusting knob is used for adjusting the temperature in the second heating zone.
A using method of a powder spheroidizing furnace comprises the following steps:
step 1: adding sample powder into the automatic powder feeder, vacuumizing the powder spheroidizing furnace, and introducing protective gas by using a gas path controller to fill the powder spheroidizing furnace;
step 2: adjusting the temperature of the first heating area to be 1000-;
and step 3: and the sample powder is conveyed to the screw type feeding channel through the automatic powder feeder, the screw type feeding channel feeds the powder, the sample powder passes through the molybdenum tube under the action of gravity, the surface of the sample powder is continuously micro-melted, and finally spheroidized powder is obtained.
Further, the protective gas is one of argon gas, nitrogen gas or argon-hydrogen mixed gas.
The invention has the beneficial effects that:
1. the invention provides a powder spheroidizing furnace, which utilizes high temperature to preheat sample powder, then carries out surface micro-melting, and finally realizes spheroidizing shaping under the action of gravity and surface tension, solves the problems of low spheroidizing efficiency, larger granularity, low purity, high oxygen content and the like of a powder spheroidizing device in the prior art, and can be used for exploration experiments of a small amount of novel materials and spheroidizing treatment in mass production.
2. The invention provides a powder spheroidizing furnace, which can sinter and reduce a sample under the protection of vacuum or protective gas in the powder spheroidizing furnace, and has the advantages of low device cost, simplicity and easiness in operation, adjustable temperature, controllable time and adjustable feeding speed.
3. The invention provides a using method of a powder spheroidizing furnace, and provides a basis for the use of the powder spheroidizing furnace through the design of the using method.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a schematic structural view of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.
Example 1
The powder spheroidizing furnace shown in fig. 1 comprises an automatic powder feeder 1, a double-heating-zone vertical tube furnace 2 and a spherical powder collector 3 which are sequentially communicated from top to bottom;
the automatic powder feeder 1 comprises a feeding funnel 11 and a powder feeding regulator 12 fixedly communicated below the feeding funnel 11, and the left side of the powder feeding regulator 12 is communicated with a screw type feeding channel 13;
the double-heating-zone vertical tube furnace 2 comprises a heating furnace body 21 and a molybdenum tube 22 arranged inside the heating furnace body 21, the upper end and the lower end of the heating furnace body 21 are respectively communicated with a first sealing platform 23 and a second sealing platform 24, an upper end flange 231 is communicated above the first sealing platform 23, one end of the molybdenum tube 22, which penetrates through the first sealing platform 23, is communicated with the upper end flange 231, the right side of the upper end flange 231 is communicated with the screw type feeding channel 13, and a precise needle valve 232 and a vacuum pressure gauge 233 are arranged on the upper end flange 231;
a heating furnace temperature control plate 211 is arranged on the right side of the heating furnace body 21, and a first temperature adjusting knob 212 and a second temperature adjusting knob 213 are sequentially arranged on the front side surface of the heating furnace temperature control plate 211 from top to bottom;
the spherical powder collector 3 comprises a collecting protective cover 31 and a lower end flange 32 arranged in the collecting protective cover 31, and one end of the molybdenum tube 22 penetrating through the second sealing platform 24 is communicated with the lower end flange 32;
the side surface of the lower end flange 32 is provided with a vacuum port 321, the edge of the lower bottom surface of the lower end flange 32 is communicated with a material receiving port 322, the lower bottom surface of the lower end flange 32 is communicated with an air channel pipeline 323, and one end of the air channel pipeline 323 penetrating through the collecting protective cover 31 is communicated with an air channel controller 324;
the front side surface of the powder supply regulator 12 is electrically connected with a speed regulating knob 121;
a first heating zone 214 is formed in the heating furnace body 21, a second heating zone 215 is formed in the molybdenum tube 22, a first temperature adjusting knob 212 is used for adjusting the temperature in the first heating zone 214, and a second temperature adjusting knob 213 is used for adjusting the temperature in the second heating zone 215.
The embodiment provides a powder spheroidizing furnace, which utilizes high temperature to preheat sample powder, then carries out surface micro-melting, and finally realizes spheroidizing shaping under the action of gravity and surface tension, so that the problems of low spheroidizing efficiency, large granularity, low purity, high oxygen content and the like of a powder spheroidizing device in the prior art are solved, and the powder spheroidizing furnace can be used for exploration experiments of a small amount of novel materials and can also be used for spheroidizing in mass production; the powder spheroidizing furnace can sinter and reduce a sample under the protection of vacuum or protective gas, and has the advantages of low device cost, simplicity, easy operation, adjustable temperature, controllable time and adjustable feeding speed.
Example 2
The embodiment provides a method for using a powder spheroidizing furnace, which comprises the following steps:
step 1: adding titanium powder into the automatic powder feeder 1, vacuumizing the powder spheroidizing furnace, and then introducing protective gas to fill the powder spheroidizing furnace by using the gas path controller 324;
step 2: adjusting the temperature of the first heating zone 214 to 1200 ℃ using the first temperature adjustment knob 212 and the temperature of the second heating zone 215 to 1500 ℃ using the second temperature adjustment knob 213;
and step 3: the titanium powder is transmitted to the screw type feeding channel 13 through the automatic powder feeder 1, the screw type feeding channel 13 feeds the powder, the titanium powder passes through the molybdenum tube 22 under the action of gravity, the surface is continuously micro-melted, and finally the spheroidized titanium powder is obtained.
Example 3
The embodiment provides a method for using a powder spheroidizing furnace, which comprises the following steps:
step 1: adding lanthanum aluminate ceramic powder into the automatic powder feeder 1, vacuumizing the powder spheroidizing furnace, and then introducing protective gas to fill the powder spheroidizing furnace by using the gas path controller 324;
step 2: adjusting the temperature of the first heating zone 214 to 1500 ℃ using the first temperature adjustment knob 212 and the temperature of the second heating zone 215 to 1500 ℃ using the second temperature adjustment knob 213;
and step 3: the lanthanum aluminate ceramic powder is conveyed to the screw type feeding channel 13 through the automatic powder feeder 1, the screw type feeding channel 13 feeds the powder, the lanthanum aluminate ceramic powder passes through the molybdenum tube 22 under the action of gravity, the surface is continuously micro-melted, and finally the spheroidized lanthanum aluminate ceramic powder is obtained.
Example 4
The embodiment provides a method for using a powder spheroidizing furnace, which comprises the following steps:
step 1: adding magnesium oxide powder into the automatic powder feeder 1, vacuumizing the powder spheroidizing furnace, and then introducing protective gas to fill the powder spheroidizing furnace by using the gas path controller 324;
step 2: adjusting the temperature of the first heating zone 214 to 1500 ℃ using the first temperature adjustment knob 212 and adjusting the temperature of the second heating zone 215 to 1650 ℃ using the second temperature adjustment knob 213;
and step 3: the magnesium oxide powder is transmitted to the screw type feeding channel 13 through the automatic powder feeder 1, the screw type feeding channel 13 feeds the powder, the magnesium oxide powder passes through the molybdenum tube 22 under the action of gravity, the surface is continuously micro-melted, and finally the spheroidized magnesium oxide powder is obtained.
Example 5
The embodiment provides a method for using a powder spheroidizing furnace, which comprises the following steps:
step 1: adding nickel-based alloy powder into the automatic powder feeder 1, vacuumizing the powder spheroidizing furnace, and then introducing protective gas into the powder spheroidizing furnace by using the gas path controller 324 to fill the powder spheroidizing furnace;
step 2: adjusting the temperature of the first heating zone 214 to 1000 ℃ using the first temperature adjustment knob 212 and adjusting the temperature of the second heating zone 215 to 1650 ℃ using the second temperature adjustment knob 213;
and step 3: the nickel-based alloy powder is conveyed to the screw type feeding channel 13 through the automatic powder feeder 1, the screw type feeding channel 13 feeds the powder, the magnesium oxide powder passes through the molybdenum tube 22 under the action of gravity, the surface is continuously micro-melted, and finally the spheroidized nickel-based alloy powder is obtained.
Example 6
The embodiment provides a method for using a powder spheroidizing furnace, which comprises the following steps:
step 1: adding battery electrode powder into the automatic powder feeder 1, vacuumizing the powder spheroidizing furnace, and then introducing protective gas to fill the powder spheroidizing furnace by using the gas path controller 324;
step 2: adjusting the temperature of the first heating zone 214 to 1000 ℃ using the first temperature adjustment knob 212 and the temperature of the second heating zone 215 to 1450 ℃ using the second temperature adjustment knob 213;
and step 3: the battery electrode powder is conveyed to the screw type feeding channel 13 through the automatic powder feeder 1, the screw type feeding channel 13 feeds the powder, the magnesium oxide powder passes through the molybdenum tube 22 under the action of gravity, the surface is continuously micro-melted, and finally the spheroidized battery electrode powder is obtained.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.
Claims (5)
1. The utility model provides a powder spheroidizing furnace which characterized in that: comprises an automatic powder feeder (1), a double-heating-zone vertical tube furnace (2) and a spherical powder collector (3) which are sequentially communicated from top to bottom;
the automatic powder feeder (1) comprises a feeding funnel (11) and a powder feeding regulator (12) fixedly communicated below the feeding funnel (11), and the left side of the powder feeding regulator (12) is communicated with a screw type feeding channel (13);
the double-heating-zone vertical tube furnace (2) comprises a heating furnace body (21) and a molybdenum tube (22) arranged in the heating furnace body (21), the upper end and the lower end of the heating furnace body (21) are respectively communicated with a first sealing platform (23) and a second sealing platform (24), an upper end flange (231) is communicated above the first sealing platform (23), one end of the molybdenum tube (22) penetrating through the first sealing platform (23) is communicated with the upper end flange (231), the right side of the upper end flange (231) is communicated with a screw type feeding channel (13), and a precision needle valve (232) and a vacuum pressure gauge (233) are arranged on the upper end flange (231);
a heating furnace temperature control plate (211) is arranged on the right side of the heating furnace body (21), and a first temperature adjusting knob (212) and a second temperature adjusting knob (213) are sequentially arranged on the front side surface of the heating furnace temperature control plate (211) from top to bottom;
the spherical powder collector (3) comprises a collecting protection cover (31) and a lower end flange (32) placed inside the collecting protection cover (31), and one end of the molybdenum pipe (22) penetrating through the second sealing platform (24) is communicated with the lower end flange (32);
the side of the lower end flange (32) is provided with a vacuum port (321), the edge of the lower bottom surface of the lower end flange (32) is communicated with a material receiving port (322), the lower bottom surface of the lower end flange (32) is communicated with an air channel pipeline (323), and one end of the air channel pipeline (323) penetrating through the collection protective cover (31) is communicated with an air channel controller (324).
2. The powder spheroidizing furnace of claim 1, wherein: the front side surface of the powder supply regulator (12) is electrically connected with a speed regulating knob (121).
3. The powder spheroidizing furnace of claim 1, wherein: a first heating zone (214) is formed in the heating furnace body (21), a second heating zone (215) is formed in the molybdenum tube (22), the first temperature adjusting knob (212) is used for adjusting the temperature in the first heating zone (214), and the second temperature adjusting knob (213) is used for adjusting the temperature in the second heating zone (215).
4. The use method of the powder spheroidizing furnace is characterized in that: the using method comprises the following steps:
step 1: adding sample powder into the automatic powder feeder (1), vacuumizing the powder spheroidizing furnace, and then introducing protective gas into the powder spheroidizing furnace by using a gas circuit controller (324) to fill the powder spheroidizing furnace;
step 2: the temperature of the first heating zone (214) is adjusted to be 1000-;
and step 3: the sample powder is transmitted to the screw type feeding channel (13) through the automatic powder feeder (1), the screw type feeding channel (13) feeds the powder, the sample powder passes through the molybdenum tube (22) under the action of gravity, the surface is continuously micro-melted, and finally spheroidized powder is obtained.
5. The using method of the powder spheroidizing furnace as claimed in claim 4, wherein the method comprises the following steps: the protective gas is one of argon, nitrogen or argon-hydrogen mixture gas.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117704829A (en) * | 2023-12-27 | 2024-03-15 | 山东奥生工业装备有限公司 | Continuous powder spheroidizing furnace with stable temperature |
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| CN101549268A (en) * | 2009-04-17 | 2009-10-07 | 羊建高 | Method for producing spherical high-temperature powder material |
| CN201431869Y (en) * | 2009-04-17 | 2010-03-31 | 戴煜 | High-temperature powder material nodularization device |
| CN202861394U (en) * | 2012-11-08 | 2013-04-10 | 建德市易通金属粉材有限公司 | Iron-based powder balling device |
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| CN2745677Y (en) * | 2004-11-10 | 2005-12-14 | 戴煜 | Powder material balling device |
| CN101549268A (en) * | 2009-04-17 | 2009-10-07 | 羊建高 | Method for producing spherical high-temperature powder material |
| CN201431869Y (en) * | 2009-04-17 | 2010-03-31 | 戴煜 | High-temperature powder material nodularization device |
| CN202861394U (en) * | 2012-11-08 | 2013-04-10 | 建德市易通金属粉材有限公司 | Iron-based powder balling device |
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| CN117704829A (en) * | 2023-12-27 | 2024-03-15 | 山东奥生工业装备有限公司 | Continuous powder spheroidizing furnace with stable temperature |
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Application publication date: 20200324 |