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A kind of preparation method of granular coated cobalt powder

A technology of coating cobalt powder and granular, which is applied in the field of preparation of granular coated cobalt powder, which can solve the problem of poor strength of granular coated cobalt powder, poor fluidity of granular coated cobalt powder, and inability to apply automatic feeding and other problems, to achieve the effect of avoiding high-temperature drying process, round and smooth appearance, and saving airflow crushing process

Active Publication Date: 2020-02-07
JINGMEN GEM NEW MATERIAL +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preparation method of granular coated cobalt powder, aiming to solve the problem that the existing granular coated cobalt powder has poor fluidity and cannot be applied to automatic feeding, or the existing granular coated cobalt powder is used for To ensure good fluidity, it is necessary to use organic solvents to complete the coating process, and the strength of the obtained granular coated cobalt powder is not suitable for transportation, and the problem is high cost

Method used

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  • A kind of preparation method of granular coated cobalt powder
  • A kind of preparation method of granular coated cobalt powder
  • A kind of preparation method of granular coated cobalt powder

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[0019] The embodiment of the present invention provides a preparation method of granular coated cobalt powder, comprising the following steps:

[0020] S01. Provide spongy cobalt powder;

[0021] S02. The spongy cobalt powder is sequentially subjected to controlled crushing treatment and first sieving treatment to obtain granular cobalt powder with a particle size of 30-80 mesh;

[0022] S03. After preheating the granular cobalt powder, heating and mixing the granular cobalt powder and the molten coating agent and then cooling to obtain prefabricated granular coated cobalt powder;

[0023] S04. The prefabricated granular coated cobalt powder is subjected to drum granulation and second sieving treatment to obtain granular coated cobalt powder.

[0024] Specifically, in the above-mentioned step S01, the spongy cobalt powder is the precursor of the conventionally used ultra-fine cobalt powder, and its price is low. Using it as a raw material can also save the airflow of using th...

Embodiment 1

[0044] A preparation method of granular coated cobalt powder, comprising the following steps:

[0045] S01. Take FSSS as spongy cobalt powder of 1.45 μm;

[0046] S02. The spongy cobalt powder is sequentially subjected to controlled crushing and first sieving to obtain granular cobalt powder with a particle size of 30-80 mesh, wherein the frequency of the controlled crusher is set to 30 Hz;

[0047] S03. Add the granular cobalt powder into the planetary mixing tank, set the temperature of the circulating water at 58°C, preheat for 15 minutes under vacuum, then weigh paraffin wax with 2% cobalt powder, add the preheated cobalt after melting powder. The stirring speed was set at 10r / min, stirring and mixing under vacuum conditions for 50 minutes, then switching the circulating water to cooling water, and stirring and cooling for 25 minutes.

[0048] S04. Transfer the mixed cobalt powder from the mixing tank to the drum, and roll for 5 minutes to obtain granular cobalt powder w...

Embodiment 2

[0051] A preparation method of granular coated cobalt powder, comprising the following steps:

[0052] S01. Take FSSS as spongy cobalt powder of 1.45 μm;

[0053] S02. The spongy cobalt powder is sequentially crushed by pair of rollers for controlled crushing and first sieving to obtain granular cobalt powder with a particle size of 30-80 mesh, wherein the interval of the pair of rollers is 1-7mm ;

[0054] S03. Add the granular cobalt powder into the planetary mixing tank, set the temperature of the circulating water at 58°C, preheat for 15 minutes under vacuum, then weigh paraffin wax with 2% cobalt powder, add the preheated cobalt after melting powder. The stirring speed was set at 10r / min, stirring and mixing under vacuum conditions for 50 minutes, then switching the circulating water to cooling water, and stirring and cooling for 25 minutes.

[0055] S04. Transfer the mixed cobalt powder from the mixing tank to the drum, and roll for 5 minutes to obtain granular cobalt...

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Abstract

The invention belongs to the technical field of hard alloys and provides a granular coating cobalt powder preparation method. The preparation method comprises the following steps that spongy cobalt powder is provided; the spongy cobalt powder is sequentially subjected to controlled crushing treatment and primary sieving treatment to obtain granular cobalt powder with the particle size being 30-80 meshes; the granular cobalt powder is preheated, and the granular cobalt powder and a molten coating agent are cooled after being heated and mixed so as to obtain precast granular coating cobalt powder; and the precast granular coating cobalt powder is subjected to roller granulation and secondary sieving treatment to obtain granular coating cobalt powder.

Description

technical field [0001] The invention belongs to the technical field of hard alloys, in particular to a preparation method of granular coated cobalt powder. Background technique [0002] As we all know, the cobalt powder used in the cemented carbide industry is generally a powdered cobalt powder with a particle size of less than 10 microns. These cobalt powders are ball milled with downstream tungsten carbide components, organically coated granulated, pressed, and high-temperature sintered for demoulding. get the product. However, with the improvement of automation level, more and more automatic feeding systems are used in the cemented carbide industry. The fluidity of traditional cobalt powder particles is very fine, and after being coated with an organic coating agent, its fluidity becomes even worse, which seriously affects automatic feeding. [0003] As mentioned in the patent CN201110091348.2 "a production method of granulated cobalt powder", in this method, ultrafine ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F1/02B22F9/04
Inventor 郭苗苗许开华张云河刘文泽乐绪清
Owner JINGMEN GEM NEW MATERIAL
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