Unlock instant, AI-driven research and patent intelligence for your innovation.

A method for continuously producing cobalt powder with large Fischer particle size

A technology with high production cost and particle size, which is applied in the field of cobalt powder production, can solve problems such as difficult to obtain cobalt powder, influence of cobalt powder particle size distribution, uneven particle size distribution of cobalt powder, etc., and achieve good shape, large Fischer particle size, The effect of improving purity

Active Publication Date: 2017-09-22
JINGMEN GEM NEW MATERIAL
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A method for continuously producing cobalt powder with large Fischer particle size
  • A method for continuously producing cobalt powder with large Fischer particle size
  • A method for continuously producing cobalt powder with large Fischer particle size

Examples

Experimental program
Comparison scheme
Effect test

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...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
concentrationaaaaaaaaaa
particle sizeaaaaaaaaaa
particle sizeaaaaaaaaaa
Login to View More

Abstract

The invention provides a kind of method for continuously producing cobalt powder of large Fibonacci particle size, comprises the steps: (1) providing cobalt salt solution, ammoniacal liquor and hydrazine hydrate solution; (2) opening agitator and flowmeter, making cobalt salt solution, Ammonia and hydrazine hydrate solution are continuously added into the reactor simultaneously to react; the product obtained from the reaction is washed, dried, and crushed to obtain the cobalt powder with a large Fischer particle size; in the reaction process, the reaction temperature is controlled to 55-70°C, control the stirring speed of the agitator to 800-900r / min, control the flow of the cobalt salt solution, ammonia water and hydrazine hydrate solution, so that the reaction pH value is 11.0-11.5. The method adopts hydrazine hydrate to reduce cobalt salt to obtain cobalt powder, does not need to prepare cobalt powder precursor, avoids the influence of cobalt powder precursor treatment process on the cobalt powder particle size distribution, and the cobalt powder prepared has good appearance, high purity, Fibonacci The particle size is large and evenly distributed.

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

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(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