Powder feeder with anti-agglomeration function

Abstract

The invention discloses a powder feeder with an anti-agglomeration function, and relates to the technical field of plasma powder making. The powder feeder with the agglomeration preventing function comprises a powder cylinder, a powder discharging cylinder, a conical cylinder, a powder scraping device arranged in the powder cylinder, a buffering device arranged in the powder discharging cylinder and a power device; the buffering device comprises a buffering rotating shaft, a scraper rotor, a disc-shaped stator, a powder stirring rotor and a disc-shaped powder discharging stator, wherein the scraper rotor, the disc-shaped stator, the powder stirring rotor and the disc-shaped powder discharging stator are sequentially arranged on the outer side of the buffering rotating shaft in a sleeving mode from top to bottom; the scraper rotor comprises powder distributing blades, and powder falling holes vertically extending downwards are formed in the disc-shaped stator. The powder stirring rotor comprises a plurality of powder stirring blades which are annularly arranged on the outer side of the buffering rotating shaft through a sleeve, and a plurality of arc-shaped holes which vertically extend downwards and penetrate through the disc-shaped powder discharging stator are formed in the disc-shaped powder discharging stator. The powder feeder with the anti-agglomeration function can feed powder immediately after being opened and stop immediately after being closed, is uniform in powder feeding, is suitable for ultrafine particles, and can solve the problems of agglomeration and powder leakage when the powder form and the particle size of a traditional gravity powder feeder are changed greatly.

Description

technical field [0001] The invention relates to the technical field of plasma powder making, in particular to a powder feeder with anti-agglomeration function. Background technique [0002] With radio frequency (RF) plasma technology as the core technology, various gases are heated by ohmic heating through the induction of radio frequency electromagnetic fields to generate plasma. The powder makes it form spherical particles by surface tension during the falling process. [0003] In the radio frequency plasma spheroidization device, the function of the powder feeder is to uniformly send irregular powder into the plasma torch to form spherical particles. However, due to the need to ensure the vacuum degree during the powder feeding process, it is also necessary to ensure Particles can be transported continuously like a liquid without agglomeration. In practical application, powders with different properties and particle sizes will have different situations. For example, when...

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Problems solved by technology

[0003] In the radio frequency plasma spheroidization device, the function of the powder feeder is to uniformly send irregular powder into the plasma torch to form spherical particles. However, due to the need to ensure the vacuum degree during the powder feeding process, it is also necessary to ensure The particles can be transported continuously like a liquid without agglomeration. In practical application, powders with different properties and particle sizes will have different situations. For example, when the powder is finer, there will be problems of agglomeration and adsorption on the wall, and there will be powder blocking, Uneven powder feeding occurs, and when the fluidity of the powder is good, the powder in the powder tank will flow out when the powder is shut down, or when the vacuum is pumped, causing problems such as powder leakage. At this time, the plasma torch may not be working. If some particles leak into the reaction chamber at this time, it will cause a decrease in the yield of the finished product and affect the final quality.

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