The invention provides a method capable of continuously preparing micron-sized spherical gold
powder with uniform particle size. According to the method, a
rapid rotation nucleation method capable of effectively reducing interference of the external environment on gold grain
nucleation is adopted, the gold-containing
mother liquor and a
reducing agent are introduced into a
rapid rotation nucleation reactor at the same time,
mass transfer reaction is rapidly completed in micro-nano liquid drops generated through high-speed rotation
cutting, a huge amount of uniform
crystal nuclei are formed, then the
crystal nuclei are introduced into a rear reactor, and the gold-containing
mother liquor is obtained. And the controllable growth of the spherical gold
powder crystal grains is continuously completed until the spherical gold
powder particles in the micron-sized particle size range are obtained, then the obtained micron-sized spherical gold powder precipitate is washed and dried, and the spherical gold powder with the uniform particle size can be obtained. The spherical gold powder which is high in purity, good in
dispersity, smooth in surface and more uniform in
particle size distribution compared with a common
liquid phase reduction method can be continuously prepared through the method, and the average particle size D50 of the spherical gold powder ranges from 1
micrometer to 3 micrometers.