Method for producing nickel-cobalt metal powder

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, dryingand 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 belongs to the technical fields of nonferrous metallurgy, powder metallurgy and material preparation. It relates to a process method for preparing nickel powder or cobalt powder or nickel-cobalt alloy powder by using a hydrometallurgical hydrothermal hydrogen reduction process method with nanometer or superfine nickel and cobalt metal powder as crystal seeds. technical background [0002] Nickel-cobalt (Ni-Co) alloy powder has special properties, which are different from the physical, chemical, magnetic and mechanical properties of general pure nickel and cobalt metal powders. It is used in hard alloys, hydrogen storage alloys, magnetic materials, catalysts, electroplating, batteries and other industries have broad application prospects. In addition, in the preparation of cemented carbide, cobalt metal is expensive and resources are scarce. People have been studying cobalt substitutes, such as nickel a...

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