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Continuous production apparatus for nano metal powder

A nano-metal powder and production equipment technology, which is applied in the preparation of nano-metal compounds and coated nano-metal powders, in the field of nano-metal powders, can solve the problems of poor purity of nano-metal powders, low equipment yields, and small temperature gradients. problems, to achieve the effect of improving the scope of application and market competitiveness, increasing reliability and stability, and reducing particle size

Inactive Publication Date: 2009-02-04
MIYOU GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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.

Method used

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  • Continuous production apparatus for nano metal powder
  • Continuous production apparatus for nano metal powder
  • Continuous production apparatus for nano metal powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] Embodiment 1: Table 1 is the preparation experiment result of the nano Ni powder of the equipment of the present invention, compared with traditional equipment, the maximum productive rate of single gun nano Ni powder has improved 25 times.

[0067] Table 1 Experimental results of preparation of nano-Ni powder

[0068]

Embodiment 2

[0069] Example 2: Table 2 shows the experimental results of the preparation of nano-Cu powder of the equipment of the present invention. Compared with traditional equipment, the maximum yield of single-gun nano-Cu powder is increased by 204.7 times.

[0070] Table 2 Experimental results of preparation of nano-Cu powder

[0071]

Embodiment 3

[0072] Embodiment 3: the preparation of highly uniform elemental mixed nano-copper-nickel composite powder, according to the following process parameters: H 2 / Ar=2 / 8, pressure=0.06MPa, electric current: 350A (nickel pole) and 300A (copper pole), the productive rate of Cu, Ni composite powder prepared by two guns is 75.1g / h, makes the powder body The average particle diameter is 54nm.

[0073] There are still many specific examples of the device of the present invention, which will not be repeated here.

[0074] The working process of the present invention is: open electrical control and pressure monitoring system:

[0075] 1. Put the metal material into the raw material storage and water-cooled crucible, purify and seal the working room, and obtain the vacuum measurement system to work to the set vacuum degree (2×10 -3 Stop after Pa);

[0076] 2. The inflation system works and fills in the selected gas (filling with Ar gas and H 2 air to 0.1-0.9 atmospheres), and hold aft...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/14
Inventor 吴建明张振忠赵芳霞刘静远
Owner MIYOU GROUP
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