Apparatus and method for increasing the oxygen content of metal powders by ozone oxidation

A technology of powder oxygen content and ozone oxidation, applied in metal processing equipment, transportation and packaging, etc., can solve problems such as deterioration of dispersibility, and achieve the effects of low production cost, good oxidation effect and simple process

Active Publication Date: 2021-01-19
JIANGSU BOQIAN NEW MATERIALS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the above-mentioned deficiencies of the prior art, the present invention provides a low-temperature environment that can realize the oxygenation of metals, thereby solving the problems such as the deterioration of the dispersibility of the metal powder due to the high oxidation temperature when the oxygen content is increased, and can A device for increasing the oxygen content of metal powder by using ozone oxidation to maintain the dispersibility of metal powder and its use effect

Method used

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  • Apparatus and method for increasing the oxygen content of metal powders by ozone oxidation
  • Apparatus and method for increasing the oxygen content of metal powders by ozone oxidation
  • Apparatus and method for increasing the oxygen content of metal powders by ozone oxidation

Examples

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Effect test

Embodiment 1

[0064] Adopt the treatment method that the ozone oxidation described in the present invention increases the oxygen content of metal powder to process nickel powder, concrete operation steps are as follows:

[0065] (1) Take metal nickel powder with an average particle size of 0.3-0.4um (micron) produced by PVD method, and place it in a rotatable and sealable stainless steel cylindrical barrel (oxygenation reactor) 50kg, the diameter of the stainless steel barrel 500mm, length about 1500mm, volume about 0.3m 3 , The barrel is equipped with an ozone dosing distributor and a porous filter tube.

[0066] (2) Turn on the circumferential rotation of the stainless steel cylinder barrel body, and rotate at a speed of 10 rpm (rev / min);

[0067] (3) And turn on the ozone generator (OZ-50 gram ozone tube) to generate an ozone concentration of 30g / m 3 , the gas source is air;

[0068] (4) Turn on the booster pump and adjust the air flow in step (3) to 2.2-2.5m 3 / h, the continuous int...

Embodiment 2

[0073] (1) Take metal nickel powder with an average particle size of 0.3-0.4um produced by the PVD method, and place it in a rotatable and sealable stainless steel cylindrical barrel of 50kg. The diameter of the stainless steel barrel is 500mm, the length is about 1500mm, and the volume is about 0.3 m 3 , the barrel is equipped with an ozone dosing distributor and a porous tube.

[0074] (2) Turn on the heating system for step (1), and heat the temperature in the stainless steel barrel at 50-110°C;

[0075] (3) Turn on the circumferential rotation of the barrel in step (1), and rotate at a speed of 10 rpm (rev / min);

[0076] (4) Open the ozone generator (OZ-50 gram ozone tube) to step (2), the ozone concentration that produces is 30g / m 3 , the gas source is air;

[0077] (5) Turn on the booster pump and adjust the air flow in step (3) to 2.2-2.5m 3 / h, the continuous intake time is about 3h;

[0078] (6) Stop steps (2), (3), (4), and (5), and take samples to measure the o...

Embodiment 3

[0082] (1) Take metal nickel powder with an average particle size of 0.3-0.4um produced by the PVD method, and place it in a rotatable and sealable stainless steel cylindrical barrel of 50kg. The diameter of the stainless steel barrel is 500mm, the length is about 1500mm, and the volume is about 0.3 m 3 , the barrel is equipped with an ozone dosing distributor and a porous tube.

[0083] (2) Turn on the circumferential rotation of the barrel in step (1), and rotate at a speed of 10 rpm (rev / min);

[0084](3) Open the ozone generator to step (2) (can adopt OZ-20 gram ozone tube OZ-50 gram ozone tube, OZ-100 gram ozone tube), produce ozone concentration and be 30g / m 3 , the gas source is air;

[0085] (4) Turn on the booster pump and adjust the air flow in step (3) to 0.8-6.0m 3 / h, the continuous intake time is about 3h;

[0086] (5) Stop steps (2), (3), and (4), and take samples to measure the oxygen content.

[0087] Table 6 is the same time, the ozone oxidation effect d...

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Abstract

A device and method for increasing the oxygen content of metal powder by utilizing ozone oxidation, the device includes an ozone generator, an ozone dosing distributor, and an oxygenation reactor; the ozone generator is transported into the ozone dosing distributor through pipelines Ozone, the ozone dosing distributor is arranged in the oxygenation reactor, and the ozone transported by it is in contact with the metal to be aerated in the oxygenation reactor; the oxygenation reactor can rotate circumferentially And can be heated; The reaction temperature in the oxygenation reactor of the present invention is 10-120 ℃, and the rotational speed of the oxygenation reactor is 1~60rpm, and the delivery rate of ozone is controlled at 0.1m 3 / h‑3.0m 3 / h, the reaction time is 0.5~5h. Metal powders that require increased oxygen content can be obtained through reasonable control of the generated ozone concentration and sustained reaction time.

Description

technical field [0001] The invention relates to a technique for increasing the oxygen content of metal powders by using ozone oxidation, which belongs to the field of powder oxidation treatment, in particular to a device and method for increasing the oxygen content of metal powders by using ozone oxidation. Background technique [0002] The metal powder needs to increase the oxygen content in the following situations: [0003] 1) When the average particle size of metal powder is getting smaller and smaller, because of its large specific surface area, its activity is too high, and its surface needs to be passivated by adding a layer of oxide protection film, which is convenient for transportation (transportation) and storage. [0004] 2) When metal powder is used for sintering, in order to increase the sintering temperature, match it with other sintering materials, and avoid faults and cracks on the sintering surface, it is necessary to add an oxide layer on the surface of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/00
CPCB22F1/145
Inventor 吴慧星洪仁杰陈钢强
Owner JIANGSU BOQIAN NEW MATERIALS
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