Nickel powder preparation method and application of nickel powder prepared through same
A technology of nickel powder and nickel salt, which is applied in the field of metal powder materials, can solve the problems that the density cannot meet the requirements of 3D printing powder, the particle size distribution is wide, and the equipment requirements are high, and the cost is low, the density is controllable, and the equipment investment is small. Effect
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[0022] Such as figure 1 Shown is the flowchart of the preparation method of the nickel powder of the embodiment of the present invention. The preparation method of this nickel powder comprises the steps:
[0023] Step S01: adding nickel salt solution and ammonium oxalate solution into the bottom solution to react to obtain nickel oxalate;
[0024] Step S02: reducing nickel oxalate to obtain crude nickel powder;
[0025] Step S03: adding the crude nickel powder to the nickel acetate and / or nickel formate solution to make the crude nickel powder absorb nickel acetate and / or nickel formate, filter and dry the crude nickel powder after adsorption;
[0026] Step S04: Reducing the adsorbed crude nickel powder to obtain nickel powder.
[0027] Through the above process, the embodiment of the present invention adopts the combination of liquid phase precipitation, physical adsorption and secondary reduction to prepare spherical nickel powder with uniform particle size distribution a...
Embodiment 1
[0040] Add 700L of pure water into a 6000L reactor, add 10kg of solid ammonium bicarbonate, and heat to 30°C with a stirring rate of 150r / min to prepare a bottom liquid. After ammonium bicarbonate is completely dissolved, add nickel chloride solution in the bottom liquid by the flow rate of 60L / h with metering pump, wherein, the nickel concentration in the nickel chloride solution is 80g / L, and by the initial flow rate of 150L / h to Ammonium oxalate solution with a concentration of 60g / L of ammonium oxalate is added to the bottom liquid, the molar ratio of nickel in the nickel salt solution to ammonium oxalate in the ammonium oxalate solution is 1:1.1, the temperature is kept at 30°C, and the stirring rate is 150r / min. By adjusting the flow rate of ammonium oxalate, the pH value is continuously reduced to 1.5. When the D50 particle size of cobalt oxalate grows to 20 μm, stop feeding, continue stirring for 30 minutes, centrifugally filter, wash and dry, and sieve through 80 mes...
Embodiment 2
[0042] Add 700L of pure water into a 6000L reactor, add 19kg of solid ammonium bicarbonate, and heat to 50°C with a stirring rate of 200r / min to prepare a bottom liquid. After ammonium bicarbonate is completely dissolved, add nickel chloride solution to the bottom liquid by a flow rate of 20L / h with a metering pump, wherein the nickel concentration in the nickel chloride solution is 100g / L, and the initial flow rate of 150L / h Ammonium oxalate solution with a concentration of 70g / L of ammonium oxalate is added to the bottom liquid, the molar ratio of nickel in the nickel salt solution to ammonium oxalate in the ammonium oxalate solution is 1:1.3, the temperature is kept at 50°C, and the stirring rate is 200r / min. By adjusting the flow rate of ammonium oxalate, the pH value is continuously reduced to 2.2. When the D50 particle size of cobalt oxalate grows to 25 μm, stop feeding, continue stirring for 30 minutes, centrifugally filter, wash and dry, and sieve through 80 mesh to o...
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