Process for the production of powdered nickel

B - Operations – Transporting – 22 – F

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B22F 9/28 (2006.01)

Patent

CA 2287373

Chlorine gas from a supply nozzle is mixed with the vapor of nickel chloride and the mixed gas is supplied from a supply nozzle into a hydrogen gas atmosphere in a reduction reactor at a reduction temperature of 900 to 1100°C. The volume of chlorine gas to be mixed versus the vapor of nickel chloride is adjusted to a ratio of 0.01 to 0.5 moles per mole of the vapor of nickel chloride. The particle size of the nickel powder can be controlled appropriately, and also, uniformity of particle size, smoothability of surfaces of particles, and sphericity can be improved.

On mélange une vapeur de chlorure de nickel avec du chlore introduit par un tuyau d'alimentation (6), le rapport molaire chlore/vapeur de chlorure de nickel étant compris entre 0,01 : 1 et 0,5 : 1, puis le mélange gazeux ainsi obtenu est introduit par un tuyau d'alimentation (2) dans une atmosphère hydrogénée maintenue dans un four de réduction (1) à une température de réduction donnée (900 à 1100 DEG C), ce qui permet de produire du nickel en poudre présentant une taille des particules régulée ainsi qu'une uniformité de la taille des particules, une égalité de la surface et une sphéricité des particules améliorées.

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