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Preparation method of low-oxygen ultrafine spherical cobalt powder

A cobalt powder and spherical technology is applied in the field of preparation of low-oxygen ultrafine spherical cobalt powder, which can solve the problem of high oxygen content and achieve the effect of low oxygen content

Inactive Publication Date: 2019-04-30
江苏萌达新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, the Fibonacci particle size of most cobalt powders on the market can reach a minimum of about 0.80-0.90 μm. If the Fibonacci particle size decreases further, there will be a disadvantage of high oxygen content, so it does not need to be used in high-end super hard alloy products and high temperature. Alloy products

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] A preparation method of hypoxic ultrafine spherical cobalt powder, the concrete steps are as follows:

[0013] (1) Use the precursor cobalt carbonate as the raw material, use the steel belt reduction furnace to feed hydrogen for reduction, the reduction temperature is 350 ° C, the reduction time is 5 hours, the material thickness on the steel belt is 2.5 cm, and the hydrogen flow rate is 8m 3 / h;

[0014] (2) Then the massive sponge cobalt obtained after reduction is protected by carbon dioxide inflation, and then crushed and classified using a nitrogen closed circulation jet mill to obtain powdered cobalt powder;

[0015] (3) Finally, the powdered cobalt powder is mixed and batched to obtain the finished low-oxygen ultrafine spherical cobalt powder.

Embodiment 2

[0017] A preparation method of iron-cobalt-copper alloy powder, the specific steps are as follows:

[0018] (1) Use the precursor cobalt carbonate as the raw material, use a steel belt reduction furnace to feed hydrogen for reduction, the reduction temperature is 380°C, the reduction time is 5.5 hours, the material thickness on the steel belt is 2.8cm, and the hydrogen flow rate is 9m 3 / h;

[0019] (2) Then the massive sponge cobalt obtained after reduction is protected by carbon dioxide inflation, and then crushed and classified using a nitrogen closed circulation jet mill to obtain powdered cobalt powder;

[0020] (3) Finally, the powdered cobalt powder is mixed and batched to obtain the finished low-oxygen ultrafine spherical cobalt powder.

Embodiment 3

[0022] (1) Use the precursor cobalt carbonate as the raw material, use the steel belt reduction furnace to feed hydrogen for reduction, the reduction temperature is 400°C, the reduction time is 6 hours, the material thickness on the steel belt is 3.0cm, and the hydrogen flow rate is 10m 3 / h;

[0023] (2) Then the massive sponge cobalt obtained after reduction is protected by carbon dioxide inflation, and then crushed and classified using a nitrogen closed circulation jet mill to obtain powdered cobalt powder;

[0024] (3) Finally, the powdered cobalt powder is mixed and batched to obtain the finished low-oxygen ultrafine spherical cobalt powder.

[0025] Table I

[0026]

[0027] It can be seen from the above table that the iron-cobalt-copper alloy powder produced by the present invention has better powder Fisherman's particle size and oxygen content, and the quality is better than some iron-cobalt-copper alloy powders on the market.

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Abstract

The invention discloses a preparation method of low-oxygen ultrafine spherical cobalt powder. The preparation method specifically comprises the following steps of (1) taking precursor cobalt carbonateas a raw material, and introducing hydrogeninto asteel strip type reduction furnaceto carry out reduction by using, wherein the reduction temperature is 350-400 DEG C, the duration of reduction is 5-6 hours, the material spreading thickness of the raw material on a steel strip is 2.5-3.0 cm, and the hydrogen flow rate is 8-10 m<3> / h; (2) carrying out gas filling protection on blocky sponge cobaltobtained after reduction by using carbon dioxide, and then carrying out crushing and grading by using a nitrogen sealed circulating gas flow crusher to obtain powdery cobalt powder; (3) and finally mixing the powdery cobalt powder in a batch mode to obtain the finished product low-oxygen ultrafine spherical cobalt powder. The low-oxygen ultrafine spherical cobalt powder produced according to themethod is finer in Fisher particle size, the Fisher particle size of the cobalt powder is 0.50-0.70 microns, the microstructure is spherical, and the oxygen content is low and less than 0.60%. The cobalt powder can be applied to high-end ultra-hard tool alloy products and high-temperature alloy products.

Description

technical field [0001] The invention relates to the technical field of cobalt powder, in particular to a method for preparing low-oxygen ultrafine spherical cobalt powder. Background technique [0002] At present, the Fibonacci particle size of most cobalt powders on the market can reach a minimum of about 0.80-0.90 μm. If the Fibonacci particle size decreases further, there will be a disadvantage of high oxygen content, so it does not need to be used in high-end super hard alloy products and high temperature. alloy products. Contents of the invention [0003] The purpose of the present invention is to provide a method for preparing low-oxygen ultrafine spherical cobalt powder aiming at the defects and deficiencies of the prior art. [0004] In order to achieve the above object, the technical solution adopted in the present invention is: a preparation method of low-oxygen ultrafine spherical cobalt powder, the innovation of which is that the specific steps are as follows:...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/22
CPCB22F9/22
Inventor 赵军喜
Owner 江苏萌达新材料科技有限公司