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Plasma powder balling device and method and application thereof

A technology of plasma and powder feeding device, applied in the field of materials, can solve the problems of difficulty in realizing large-scale, mass production, centralized and disorderly input of powder, expensive spheroidizing equipment, etc., and achieves the advantages of industrialization promotion, high production efficiency and convenient control. Effect

Active Publication Date: 2018-06-22
HUNAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the existing plasma methods have problems such as concentrated and disordered powder input, easy agglomeration, uneven heating, and low spheroidization efficiency, and the spheroidization equipment is extremely expensive, making it difficult to achieve large-scale and batch production in the true sense.

Method used

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  • Plasma powder balling device and method and application thereof
  • Plasma powder balling device and method and application thereof

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Embodiment 1

[0035] Embodiment 1 Centrifugal divergent plasma powder spheroidization device

[0036] Such as figure 1 As shown, the centrifugal divergent plasma powder spheroidization device of this embodiment includes an automatic powder feeding device, a powder dispersion device 5 and a powder spheroidization device; the powder dispersion device 5 is connected to the automatic powder feeding device and placed in the powder spheroidization device.

[0037] Among them, the automatic powder feeding device includes the feeding port 2 and the conveying device from top to bottom, and the conveying device passes through the inside of the feeding port 2, which is set to convey powder into the powder spheroidizing device; the conveying device includes a speed regulating motor 1 and A worm gear 4 detachably connected to the powder dispersing device at one end. The powder dispersing device 5 is a porous disc (see figure 2 ), which is set to uniformly disperse the powder; the diameter of the poro...

Embodiment 2

[0039] Embodiment 2 The usage method of centrifugal divergent plasma powder spheroidization device

[0040] This embodiment discloses the usage method of the centrifugal divergent plasma powder spheroidization device of embodiment 1, including the following steps:

[0041] S1. Add the powder with irregular shape to the feed port, and quantitatively convey the powder to the powder dispersion device through the conveying device; the powder feeding speed is 100-1000g / min, and the powder in the porous disc is input into the ball through the holes on the porous disc. The diameter of the circular hole on the porous disk in the chemical chamber is 2 to 4 times the average particle diameter of the powder to be treated, and it is 3 times in this embodiment;

[0042] S2. At the same time, the delivery pipe is fed into the plasma gas. The flow rate of the plasma gas is 2-5L / min. In this embodiment, 3L / min is selected; the pressure is 0.3-0.8MPa. In this embodiment, the pressure is 0.5MPa...

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Abstract

The invention discloses a centrifugal divergent plasma powder balling device. The device comprises an automatic powder feeding device, a powder dispersing device and a powder balling device body; thepowder dispersing device and the automatic powder feeding device are connected in the powder balling device body; the powder feeding amount and the powder feeding speed of the automatic powder feedingdevice are controlled, and the powder dispersing device is also used, so that powder is uniformly dispersed; the temperature and gas flow of a balling chamber are adjusted, so that the whole device is formed into a whole, the powder can be uniformly heated in the free falling process in the balling chamber, and the powder balling effect is improved. The problems that according to existing plasmapowder balling methods, powder is centralized and input disorderly, likely to conglobate and not heated evenly, and the balling efficiency is low are fundamentally solved; the plasma powder balling device is low in manufacturing cost, and can achieve large-scale and batch production in a real sense.

Description

technical field [0001] The invention relates to the field of materials, and more specifically, to a plasma powder spheroidizing device, a method and an application thereof. Background technique [0002] Plasma spheroidization is a new process for preparing spherical powder. This technology was first proposed by METCO and applied to the preparation of hollow spherical zirconia powder. This technology utilizes the high temperature of the plasma flame and the controllability of the flame medium, heats the irregularly shaped powder prepared by the conventional preparation method in the plasma flame to become semi-solid particles, and then rapidly cools and solidifies in an inert atmosphere or water to form spherical particles . The powder morphology after plasma spheroidization treatment is mainly spherical. This spherical powder has good fluidity and surface properties, which is beneficial to eliminate the pores of powder compacted blanks, thereby significantly improving the d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00
CPCB22F2202/13B22F1/065B22F1/142Y02P10/25
Inventor 范才河范语楠刘咏阳建君欧玲郑东升张波
Owner HUNAN UNIV OF TECH
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