Process and device for preparing superfine nickel powder

The invention relates to a process and a device for preparing superfine nickel powder. According to the process, the two-stage process of low-temperature prereduction prilling and high-temperature deep reduction is conducted on superfine nickel protoxide to prepare the nickel powder. The device comprises a first fluidized bed reactor and a second fluidized bed reactor which is connected with the first fluidized bed reactor in sequence. According to the process and the device, for the core, the two processes of low-temperature prereduction prilling and high-temperature deep reduction and a doble-fluidized bed reactor system adapting to prereduction and deep reduction are adopted, uniform and rapid fluidization of particles can be achieved, purity of the prepared nickel powder can achieve more than 99%.