Production of spherical nickel powder

A thorn ball-shaped, nickel powder technology, applied in the field of nickel powder production by carbonyl nickel thermal decomposition method, can solve problems such as difficulty in nickel powder production

Inactive Publication Date: 2006-08-16
JINCHUAN GROUP LIMITED
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The use of carbonyl nickel decomposition to prepare nickel powder has been applied in industry, but it is a difficult probl

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] Control the decomposer to form six temperature sections from top to bottom, of which the temperature of the first and second sections: 300-320°C; the temperature of the third and fourth sections: 320-330°C; the temperature of the fifth and sixth sections: 260-300°C. The nickel carbonyl vapor with a flow rate of 1900-2000L / min and the carbon monoxide gas with a flow rate of 3500-4000L / min are passed into the mixing tank, so that the nickel carbonyl vapor and carbon monoxide gas form a mixed gas in a ratio of 1:2. Then pass the mixed gas into the cracker to maintain the pressure in the cracker at 5-10KPa. The nickel carbonyl in the mixed gas begins to decompose and obtain spiny nickel carbonyl powder with a particle size of 0.5-12.0 μm.

Embodiment 2

[0012] Control the decomposer to form six temperature sections from top to bottom, among which the temperature of the first and second sections: 270-290°C; the third and fourth sections: 290-310°C; the fifth and sixth sections: 250-280°C. The nickel carbonyl vapor with a flow rate of 1700-1800L / min and the carbon monoxide gas with a flow rate of 7500-8000L / min are passed into the mixing tank, so that the nickel carbonyl vapor and carbon monoxide gas form a mixed gas in a ratio of 1:4. Then pass this mixed gas into the cracker to maintain the pressure in the cracker at 6.0-12.0KPa. The nickel carbonyl in the mixed gas begins to decompose and obtain spiny nickel carbonyl powder with a particle size of 0.5-12.0 μm.

Embodiment 3

[0014] Control the decomposer to form six temperature sections from top to bottom, among which the temperature of the first and second sections: 290-310°C; the third and fourth sections: 310-330°C; the fifth and sixth sections: 280-310°C. The nickel carbonyl vapor with a flow rate of 1500-1600L / min and the carbon monoxide gas with a flow rate of 6000-6400L / min are passed into the mixing tank, so that the nickel carbonyl vapor and carbon monoxide gas form a mixed gas in a ratio of 1:4. Then pass this mixed gas into the cracker to maintain the pressure in the cracker at 8-15.0KPa. The nickel carbonyl in the mixed gas begins to decompose and obtain spiny nickel carbonyl powder with a particle size of 0.5-12.0 μm.

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Abstract

A process for preparing superfine nematospherical Ni particles includes such steps as proportionally mixing carbonyl nickel vapor with CO gas, controlling the pressure of a decomposing reactor to 5-15 Kpa and its internal temp to be divided into 6 temp segments, filling said gas mixture in said decomposing reactor from its top, the carbonyl nickel dropping down while thermal decomposing to become superfine dendritic Ni particles (0.2-6 microns) and colliding between the Ni particles.

Description

technical field [0001] A method for preparing spiny nickel powder relates to a method for producing nickel powder by adopting a carbonyl nickel thermal decomposition method. Background technique [0002] Prickly spherical ultrafine nickel carbonyl powder is a powder product with high purity and dispersibility. It has uniform specifications, and the surface has a prickly needle-like spherical structure. The special shape and fine particles (the particle size is generally less than 10 microns) make the product The powder is very suitable for the powder metallurgy industry. The preparation of nickel powder by decomposition of nickel carbonyl has been applied in industry, but it is a difficult problem in the production of nickel powder to realize the effective control of fine particles and surface area of ​​nickel powder. It is especially important to explore the method of industrialized production of powder products with high purity and dispersion, uniform specifications, pric...

Claims

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Application Information

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IPC IPC(8): B22F9/30
Inventor 李永军张强林谭世雄王多冬肖冬明李朝平刘军位王良
Owner JINCHUAN GROUP LIMITED
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