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Method for continuously producing large-Fisher-particle-size cobalt powder

A technology with high production cost and particle size, applied in the field of cobalt powder production, can solve the problems of uneven particle size distribution of cobalt powder, influence of particle size distribution of cobalt powder, difficulty in obtaining cobalt powder, etc. Responsive effect

Active Publication Date: 2016-01-27
JINGMEN GEM NEW MATERIAL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are many ways to prepare cobalt powder, most of which are to synthesize cobalt precursors such as cobalt carbonate, cobalt oxalate, and cobalt tetroxide, and then reduce them in a reduction furnace after drying to obtain cobalt powder. Among them, it is easy to have a certain impact on the particle size distribution of the reduced cobalt powder, and the particle size distribution of the reduced cobalt powder may be uneven, and it is difficult to obtain a cobalt powder with a super large Fischer particle size.

Method used

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  • Method for continuously producing large-Fisher-particle-size cobalt powder
  • Method for continuously producing large-Fisher-particle-size cobalt powder
  • Method for continuously producing large-Fisher-particle-size cobalt powder

Examples

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Embodiment 1

[0050] figure 1 It is a schematic diagram of a device for continuously producing large Fibonacci cobalt powder. Such as figure 1 As shown, the device for producing cobalt powder with a large Fischer particle size includes a flowmeter 1, a reactor 2, an agitator 3 and an agitator blade 4; wherein, the flowmeter 1 is used to control the flow of each corresponding material, and the agitator 3 is used for Add the material in the reactor 2 with stirring.

[0051] figure 2 It is a flow chart of a method for continuously producing cobalt powder with a large Fibonacci particle size. Such as figure 2As shown, a method for continuously producing cobalt powder with a large Fibonacci particle size comprises the following steps: 1) configuring a cobalt salt solution; 2) opening a constant temperature water tank, heating the water to 55-70°C, and feeding it into the external heating system of the reactor (circulation water heating), keep the temperature in the kettle at 55-70°C; 3) a...

Embodiment 2

[0059] 1) prepare cobalt chloride solution, hydrazine hydrate solution and ammoniacal liquor of certain concentration, the molar concentration of cobalt ion in the cobalt chloride solution is 1mol / L, the hydrazine hydrate concentration is 20%, and the ammoniacal liquor concentration is 30%;

[0060] 2) Add 1L of pure water bottom liquid into the 10L reaction kettle, the bottom liquid just covers the blade of the agitator, open the constant temperature water tank, heat the water to 60°C, and pass it into the external heating system of the reaction kettle;

[0061] 3) Turn on the stirrer, the stirring speed is controlled at 850r / min, and the above-mentioned three kinds of solutions are slowly passed into the reaction kettle at the same time; wherein, the cobalt chloride solution flow rate is controlled at 9ml / min, the ammonia flow rate is controlled at 4.5ml / min, and the hydration The flow rate of hydrazine is controlled at 1.5ml / min; while feeding, the temperature of the mixed s...

Embodiment 3

[0064] 1) prepare cobalt chloride solution, hydrazine hydrate solution and ammoniacal liquor of certain concentration, the molar concentration of cobalt ion in the cobalt chloride solution is 3mol / L, the hydrazine hydrate concentration is 30%, and the ammoniacal liquor concentration is 25%;

[0065] 2) Add 40L of pure water bottom liquid into the 200L reaction kettle, the bottom liquid just covers the blade of the agitator, open the heating steam valve, and heat the temperature in the kettle to 55°C;

[0066] 3) Turn on the stirrer, control the stirring speed at 900r / min, and slowly feed the above three solutions into the reactor simultaneously; wherein, the cobalt chloride solution flow rate is controlled at 106ml / min, the ammonia flow rate is controlled at 21ml / min, and the hydrazine hydrate The flow rate is controlled at 106ml / min; while feeding, the temperature of the mixed solution is controlled at 55±0.5°C, and the pH of the mixed solution is controlled at 11.3±0.1;

[0...

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Abstract

The invention provides a method for continuously producing large-Fisher-particle-size cobalt powder. The method includes the following steps that firstly, a cobalt salt solution, ammonia water and a hydrazine hydrate solution are provided; and secondly, a stirring device and a flow meter are started, the cobalt salt solution, the ammonia water and the hydrazine hydrate solution are unceasingly added to a reaction kettle at the same time to react, and the large-Fisher-particle-size cobalt powder are obtained after products obtained through the reaction are washed, dried and smashed. In the reaction process, the reaction temperature is controlled at 55-70 DEG C, the stirring speed of the stirring device is controlled at 800-900 r / min, flow of the cobalt salt solution, ammonia water and the hydrazine hydrate solution is controlled, and the reaction pH value can be 11.0-11.5. According to the method, cobalt powder is obtained by reducing cobalt salt through hydrazine hydrate, precursors of cobalt powder do not need to be prepared, the influences of the cobalt powder precursor processing process on particle size distribution of cobalt powder are avoided, and the prepared cobalt powder is god in morphology, high in purity, large in Fisher particle size and uniform in distribution.

Description

technical field [0001] The invention relates to the technical field of cobalt powder production, in particular to a method for continuously producing cobalt powder with a large Fischer particle size. Background technique [0002] Because of its excellent physical and chemical properties, cobalt powder is widely used in cemented carbide, magnetic materials, catalysts and other fields. [0003] At present, there are many ways to prepare cobalt powder, most of which are to synthesize cobalt precursors such as cobalt carbonate, cobalt oxalate, and cobalt tetroxide, and then reduce them in a reduction furnace after drying to obtain cobalt powder. In the process, it is easy to have a certain impact on the particle size distribution of the reduced cobalt powder. The particle size distribution of the reduced cobalt powder may be uneven, and it is difficult to obtain cobalt powder with a super large Fischer particle size. [0004] Therefore, it is necessary to provide a method that ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 张云河苏陶贵郭苗苗周游刘文泽吴光源许开华
Owner JINGMEN GEM NEW MATERIAL