Preparation device of spherical particle and preparation method thereof

Abstract

The invention relates to a preparation device of spherical particles in narrow particle size distribution and a preparation method thereof, belonging to the technical filed of metal particles. The device comprises a motor, a rotary aperture, a seal spraying chamber, an end cover, a pressure sensor, a heat preservation jacket, a heating coil and heating corollary equipment, wherein the rotary aperture is fixedly arranged on the output shaft of the motor; the seal spraying cavity is connected with the rotary aperture; the heat preservation jacket and the heating coil are successively arranged on the outer part of the seal spraying cavity from the outside to the inside; the end cover is arranged at the top of the seal spraying cavity and is respectively provided with a liquid transferring pipe and a gas piping; the heating corollary equipment is connected with the heating coil and the seal spraying cavity; an ultramicro nozzle is positioned at the side wall of the seal spraying cavity; and the rotary aperture is positioned at the outer part of the seal spraying cavity.

Description

technical field [0001] The invention relates to a device and method in the technical field of metal particle preparation, in particular to a device and method for preparing spherical particles with narrow particle size distribution. Background technique [0002] With the rapid development of material preparation technology and material application fields, people put forward higher requirements for the particle size, sphericity and uniformity of the prepared materials, and require the preparation process to be efficient, intelligent and automatic. Spherical particles are widely used in industries such as powder metallurgy, biomedicine and construction materials, and their preparation technology has been given great attention at home and abroad. Traditional particle and powder preparation techniques can be divided into the following categories: shred remelting, atomization, spraying and emulsification. The main feature of the shredded remelting method is that the raw material...

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Problems solved by technology

The disadvantage of this method is that the material is required to have good wire drawing deformation ability, and there are many processes; the atomization method refers to passing the pressure gas into the molten material to break it into tiny droplets, and finally solidify into shape

The disadvantage of this method is that the energy consumption of the equipment is large, the particle size distribution of the product is wide, and the sphericity is poor, and the qualified rate is low; the spray method uses piezoelectric excitation elements to disturb the liquid beam, so that it is split into droplets and finally formed

The disadvantage of this method is that the whole production process is not easy to maintain stability; the emulsification method means that two immiscible media are stirred, and one phase is evenly dispersed in the other phase

This method has poor dispersion, and the droplets are prone to fusion, resulting in uneven particle size.

[0003] After searching the prior art, it is found that although the shredded remelting method can provide relatively uniform droplets, the cumbersome process flow of this method forms a bottleneck in actual production, which restricts its application; M.Orme in "On The genesis of dropletstream microspeed dispersions" (origin of droplet microspeed fluctuations) "Physics of Fluids A: Fluid Dynamics" (vol3 (1991) 2936-2947) records a spraying method, and this document shows that a certain force is applied to the liquid beam Disturbance is conducive to its dispersion into uniform droplets. Compared with the quantitative division of the liquid beam by the rotary aperture adopted in the present invention, the traditional piezoelectric element disturbance source not only has high operating costs, but also needs a long time to maintain the liquid beam in a laminar flow state, stable Poor sex

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