The principle of radio-frequency plasma powder spheroidization technology: Inert gas (like argon) is ionized under the effect of high-frequency power supply and formed as stable high temperature inert-gas plasma. Irregular raw powders are sprayed by carrier gas (nitrogen) into the plasma through powder feeding device. Powder particles absorb large amount of heat in high temperature plasma and their surfaces are melted rapidly. Then, melted powder are sent into reaction device by extremely high speed, and fast cool under inert gas environment. Consequently, they are cooled down and solidified into spherical powders by the effect of surface tension. Furthermore, powders are collected in the gathering room.
Application
Radio-frequency plasma powder spheroidization equipment is used for spheroidizing and nano treatment of metal, alloy, oxide, nitride, carbide and other powder materials.
Main usage in the following fields:
1. Ceramic heat conduction, filler: MgO, Al2O3, SiO2, AlN
2. 3D printing: WC, Ti, W, Mo, Ta, Nb
3. Refractory metal: W, Mo, Ti
4. High temperature and high entropy alloy: alloying, spheroidization, densification;
5. Photoelectric materials: GaN, SiC, SiO2 (high purity)
Overview
The principle of radio-frequency plasma powder spheroidization technology: Inert gas (like argon) is ionized under the effect of high-frequency power supply and formed as stable high temperature inert-gas plasma. Irregular raw powders are sprayed by carrier gas (nitrogen) into the plasma through powder feeding device. Powder particles absorb large amount of heat in high temperature plasma and their surfaces are melted rapidly. Then, melted powder are sent into reaction device by extremely high speed, and fast cool under inert gas environment. Consequently, they are cooled down and solidified into spherical powders by the effect of surface tension. Furthermore, powders are collected in the gathering room.
Advantages
Radio-frequency plasma powder spheroidization equipment can shape most metals and their alloy powders, and can meet the shaping requirements of many special alloy powders, such as high temperature ceramic powders, tungsten, tantalum and other high melting point metal powders.
Advantages of radio-frequency plasma powder spheroidization technology:
①High heating temperature, fast cooling speed, no electrode contamination;
②Reaction materials are dynamically dispersed in plasma torch, in this way it can avoid the accumulation and growth of powders, and it is suitable for melting and spheroidization of powder particles;
③It’s suitable for producing tungsten, molybdenum, titanium, tungsten carbide, aluminum oxide, silicon oxide, zirconium oxide and other refractory metal and oxide powder.
④Powder made by this technology is with regular shape, high spheroidization rate, smooth surface and good flowability; density and bulk density of powder are increased.
Main Functions
We can provide 30-100KW class radio-frequency plasma powder spheroidization equipment.
Technical Parameter
| Model | EFRPB-30 | EFRPB-60 | EFRPB-100 |
| Ultimate vacuum degree | Less than 10Pa | ||
| Protective atmosphere | Nitrogen / Argon | ||
| Highest spheroidization temperature | ≥3000℃ | ||
| Heating power (KW) | 30 | 60 | 100 |
| Leakage rate | 5Pa/h | ||
| Spheroidizing rate | ≥ 95% | ||
| Power supply | Three phases, 380V, 50Hz | ||
| Frequency | 2.5—7MHz | ||
| Cooling water device | Air cooling tower, water cooling unit, heat exchanger | ||
| Control mode | Industrial control computer or PLC | ||
| Operation interface | Touch-tone or Touch-screen | ||
| Data recording | 12 data curve records, LCD monitor display | ||
Components
Radio-frequency plasma powder spheroidization consists of the following seven parts and their peripheral components.
1. Radio-frequency plasma torch;
2. Radio-frequency plasma power supply;
3. Gas supplying and powder feeding system;
4. Reaction room, collection room and support;
5. Vacuum pumping system;
6. Electric controlling and measuring system;
7. Cooling water unit
Others
The core technology of the whole set of equipment belongs to the technology of independent intellectual property rights. Ceramic constraining pipe and divergent nozzles are adopted. The equipment can work under inert gas, reduction and oxidation atmosphere environment.
For more information, please contact us
EasyFashion is the multifaceted manufacturer of atomization powder manufacturing equipment and thermal processing equipment. We take pride in offering diversified product range which comprises powder production equipment, sintering furnaces,heat treatment furnaces etc.
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