Method for preparing super-fine cobalt powder

Abstract

The invention provides a method for preparing super-fine cobalt powder which comprises the steps as follows: A) powder of cobalt carbonate or cobalt oxalate is placed in a crushing chamber; the powderof cobalt carbonate or cobalt oxalate is crushed under the action of high-speed airflow, thereby obtaining fine powder of cobalt carbonate or cobalt oxalate; B) the fine powder of cobalt carbonate orcobalt oxalate is graded by a blade grader, so as to facilitate the fine powder of cobalt carbonate or cobalt oxalate with required granularity to go through and the fine powder of cobalt carbonate or cobalt oxalate without required granularity to be retained in an airflow crusher and further crushed; C) the fine powder of cobalt carbonate or cobalt oxalate with required granularity is collectedby a cyclone collector, thereby obtaining the super-fine powder of cobalt carbonate or cobalt oxalate; and D) the obtained super-fine powder of cobalt carbonate or cobalt oxalate is reduced under reducing atmosphere in a reducing furnace. The method for preparing super-fine cobalt powder by super-fine powder of cobalt carbonate or cobalt oxalate, which is obtained by the airflow crusher, has simple operation, profitably improved production efficiency and reduced production cost, so that the method satisfies economic benefit.

Description

technical field [0001] The present invention relates to a method for producing metal powder, and in particular relates to a method for producing ultrafine cobalt powder. Background technique [0002] Ultrafine cemented carbide has excellent performance and is an important direction for the development of cemented carbide. Ultrafine cobalt powder must be added to produce ultrafine alloys. Therefore, high-quality ultrafine cobalt powder is one of the important raw materials for producing ultrafine cemented carbide. The development of ultra-fine cobalt powder is of great significance to the preparation of high-quality, precise and sharp cemented carbide products and the improvement of the industrial level of my country's cemented carbide production. [0003] The Chinese patent with the publication number CN1817517 discloses a cobalt compound precursor synthesized by secondary extraction, impurity removal and purification, atomization hydrolysis deposition, and then detonation...

AI Technical Summary

Problems solved by technology

However, the means of obtaining cobalt powder through these methods are relatively complicated, and a lot of manpower is wasted. In addition to the cobalt compound precursor, raw materials such as reducing agents are also required, which virtually increases the production cost.

[0006] To sum up, the traditional method of producing ultra-fine cobalt powder has disadvantages such as complicated acquisition of raw materials, high requirements for production conditions, and high production costs.

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