Continuous production apparatus for nano metal powder

Abstract

The invention discloses a nanometer metal powder continuous producing device, comprising a vacuum measuring aerating system, a plasma / sensitive heating evaporating powder preparing system, a particle controlling system, a nanometer metal powder cyclone grading collecting system, a nanometer powder catching collecting system, a gas cooling circulating system, a water cooling circulating system, an electric controlling detecting system, a metal nanometer powder inactivating system and a powder vacuum packing storing system. The invention has high vacuum and three-gun structure, uses plasma constant-weight packing storing device, and plasma / electromagnetic sensitive evaporation or the like to realize continuous production of nanometer metal powder, change gas component and flux or the like.

Description

technical field [0001] The invention relates to a preparation technology of nanometer metal powder, nanometer metal compound and coated nanometer metal powder, in particular to an industrialized production equipment of nanometer metal. Background technique [0002] Metal nanopowder refers to the polycrystalline material of metal particles with a particle size of 1-100nm. It belongs to zero-dimensional nanomaterials, and its atomic and electronic structures are different from metal particles with the same chemical composition. Due to the unique physical and chemical effects of metal nanomaterials, they exhibit a series of mechanical, magnetic, optical, electrical, acoustic, photocatalytic and chemical catalytic properties that are fundamentally different from ordinary polycrystalline and amorphous powder materials. It can be widely used in batteries, ceramic capacitors, large-scale integrated circuits, catalysts, magnetorheological fluids, stealth absorbing materials, lubrica...

AI Technical Summary

Problems solved by technology

Its advantages are simple structure, easy control, and low production cost, but the equipment has low yield and low energy utilization rate, and it is difficult to achieve continuous powder production

[0005] CNM850 discloses a generation chamber for industrialized production of ultrafine particles, which includes a generation chamber, double electrodes, and a continuous feeding box. The bulk yield can be doubled, and it can be produced continuously. The disadvantages are: the feed port of the continuous feeding mechanism adopts ordinary sealing, and there is no differential air extraction device, which will cause air leakage at the joint between the two rods and affect the nanometer. Purity and Properties of Metal Powders

In addition, the traditional arc torch can only move up and down and cannot swing in a circumferential direction, so that the arc torch cannot scan the entire molten metal pool. The device for adjusting the length of the arc up and down is a lever type, and the continuous change of the arc length makes the arc burn unstable; forced airflow The circulation mechanism adopts ordinary rubber rings for shaft sealing. Since the shaft seal is closely matched with the shaft, the motor rotates at a high speed and wears quickly. Its service life is only 50-60 hours, and the airtightness cannot be guaranteed.

In addition, the metal material used in this equipment can only be rod-shaped

[0006] CN2578021Y and CN02144881.7 disclose a kind of continuous production equipment of nanometer metal, the advantage of this equipment is that two pairs of electrodes are housed in the powder making room, and the continuous feeding box is equipped outside the production room, and the powder production rate can be increased by 1 time, It can be produced continuously, and overcomes the problems of poor air tightness, poor purity of nano-metal powder and instability of arc combustion in traditional technologies

However, the equipment uses transferred arc plasma heating, inconvenient arc ignition, high temperature in the powder making room, fast particle growth, and small temperature gradient during particle condensation, making it difficult to prepare metal powders below 100nm

[0008] CN2439920Y discloses a kind of equipment for producing metal nano powder by electric arc method. The advantage of this equipment is that the geometric shape of metal raw materials is not limited, there is no waste material, and it is easy to operate and use. However, the equipment has low vacuum degree, low yield and low energy utilization rate. , Metal powder is easy to accumulate in the cooler, etc.

[0012] Based on the above analysis, it can be found that the current domestic production and research equipment have not completely solved the problems of high quality, high yield, and low cost.

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