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Method for producing nickel-cobalt metal powder

A technology of metal powder and nickel-cobalt alloy, which is applied in the field of preparation of nickel-cobalt metal powder, can solve the problems of long induction period, affecting product performance, reducing product purity, etc., and achieves easy control of the production process, controllable size and composition, and preparation The effect of a wide range of conditions

Inactive Publication Date: 2009-05-13
张建玲
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The nucleating agent is added into the ammoniacal solution containing nickel sulfate (cobalt) in the form of aqueous solution, and then grows up many times to directly prepare ultra-fine nickel powder or ultra-fine cobalt powder, but this method usually takes a long time. The induction period affects production efficiency; due to the long induction period, it is particularly easy to cause scarring on the inner wall of the equipment, and then it takes a lot of time to remove it by chemical or high-pressure oxygen leaching, which increases production costs
The addition of nucleating agent has introduced other metallic elements, reduces product purity, affects the performance of product; Nucleating agent itself is expensive (as silver nitrate, palladium chloride etc.), increases production cost; Added hypertoxic substance (as cyanide Chemicals) pollute the environment

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Nanometer nickel powder is used as crystal seed, and ammonia aqueous solution of nickel sulfate is used as raw material to prepare ultrafine nickel powder. Weigh 30kg of nickel sulfate and 15.3kg of ammonium sulfate, add them into the stirring tank, pour 60L of deionized water, heat to 60°C, stir and dissolve, measure 18.45L of ammonia water with a concentration of 25%, add it into the stirring tank, and mix with the tank. Mix the aqueous solution of nickel sulfate and ammonium sulfate, and then dilute the solution with deionized water to a total volume of 100L, and prepare a mixed solution containing about 63g / L of nickel, the ratio of ammonia to nickel is 2.3, and the concentration of ammonium sulfate is 150g / L; Add 10 g of anthraquinone and 1.5 g of bone glue to the mixed solution, add an aqueous solution containing 2.1 kg of nano-nickel powder with a particle size of about 30 to 50 nm, and then transfer the mixed solution containing anthraquinone, bone glue and nano-...

Embodiment 2

[0030] Nano cobalt powder is used as crystal seed, and ammonia aqueous solution of cobalt sulfate is used as raw material to prepare ultrafine cobalt powder. Weigh 31.3 kg of cobalt sulfate and 12.2 kg of ammonium sulfate, put them in a stirring tank, pour 70 L of deionized water, heat to 40 ° C, stir and dissolve, measure 27.8 L of ammonia water with a concentration of 25%, add it into the stirring tank, and mix with the tank. Mix the cobalt sulfate and the aqueous solution of ammonium sulfate inside, and then dilute the solution with deionized water to a total volume of 120L, and prepare a mixed solution containing about 52.1g / L of cobalt, 3.5 of ammonia-cobalt ratio, and 99.6g / L of ammonium sulfate; Add 18 g of anthraquinone and 2 g of bone glue to the mixed solution, add 2.3 kg of nano-cobalt powder with a particle size of about 53 to 85 nm, and then transfer the mixed solution containing anthraquinone, bone glue and nano-cobalt powder into an autoclave with a volume of 300...

Embodiment 3

[0033] Nano-cobalt powder is used as crystal seed, and the ammoniacal aqueous solution of nickel sulfate is used as raw material to prepare nano-nickel-cobalt alloy powder. Weigh 30kg of nickel sulfate and 27.9kg of ammonium sulfate, add them into a stirring tank, pour 80 L of deionized water, heat to 50 ° C, stir and dissolve, measure 25.7 L of ammonia water with a concentration of 25%, add it into the stirring tank, and mix with the tank. Mix the ammoniacal aqueous solution of nickel sulfate, and then dilute the solution with deionized water to a total volume of 130L, and prepare a mixed solution containing about 48.5g / L of nickel, 3.2 of ammonia-nickel ratio, and 210.3g / L of ammonium sulfate; in the mixed solution Add 14.3g of anthraquinone, 1.8g of bone glue, add 5.8kg of nano-cobalt powder with a particle size of about 15-45nm, and then transfer the mixed solution containing anthraquinone, bone glue and nano-cobalt powder into a 300L autoclave, and seal it. Autoclave.

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Abstract

The invention discloses a preparation method for nickel cobalt metal powders, which belongs to the technical field for preparation of non-ferrous metal metallurgy, powder metallurgy and material preparation. The preparation method is characterized in that nanometer or ultrafine nickel and cobalt metal powders is adopted as a seed crystal, which is mixed with ammoniacal water solution with nickel sulfate, cobalt sulfate, ammonia and ammonium sulfate, the preparation method adopts a hydrometallurgical hydrothermal hydrogen reducing technology and a device thereof, and the nanometer, ultrafine or tenuous nickel powder, cobalt powder and nickel cobalt alloy powder are prepared through the procedures such as ingredient, high-pressure hydrothermal hydrogen reduction, filtration, washing, drying and the like. The preparation method can be used for the field such as hydrogen storage alloy, galvanization, catalyst, sintering activating agent, magnetic materials, electric conduction slurry, battery materials, wave-absorbing materials, hard alloy, multi-layer porcelain capacitor, powder metallurgy and the like. The preparation method has the advantages of simple raw materials, simple process, short technological process, low manufacturing cost, controllable manufacturing process, high production efficiency, even graininess of metal powders, controllable size and composition and good quality of products.

Description

Technical field [0001] A method for preparing nickel-cobalt metal powder, which belongs to the technical fields of non-ferrous metal metallurgy, powder metallurgy and material preparation. It relates to a process for preparing nickel powder, cobalt powder and nickel-cobalt alloy powder by using nanometer or ultra-fine nickel and cobalt metal powder as crystal seeds and using hydrometallurgical hydrothermal hydrogen reduction technology. technical background [0002] Nickel-cobalt (Ni-Co) alloy powder has special properties, which are different from the physical, chemical, magnetic and mechanical properties of ordinary pure nickel and cobalt metal powders. It is widely used in cemented carbide, hydrogen storage alloys, magnetic materials, catalysts, electroplating, and batteries. It has broad application prospects in other industries. In addition, in terms of cemented carbide preparation, cobalt metal is expensive and resources are scarce. People have been studying alternati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/26
Inventor 张建玲
Owner 张建玲
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