The invention provides a method for preparing spherical
cobalt powder. The method includes the following steps of mixing CoCL2.6H2O with polyhydric alcohols, adding alkali liquor, preparing mixed solutions with the
cobalt concentration of 5-30g / L, heating for 196-198 DEG C,
reflux carried out for 2-4 hours, suction
filtration, washing,
hydrogen drying and reduction under the temperature of 300-500 DEG C, and preparing the
cobalt powder. According to the method, the
cobalt salt CoCL2.6H2O is directly utilized to be reacted with the polyhydric alcohols to prepare the spherical cobalt
powder, and consumed time is shortened by 40%-60% of the time of a traditional
cobalt salt reduction method. According to the method, the polyhydric alcohols and the
hydrogen drying and the reduction under a high temperature are adopted, not only is spherical appearance of the polyhydric
alcohol reduction cobalt powder saved, but also purity of the cobalt powder is improved, under the condition that the cobalt concentration is up to 5-30g / L in an industrialized process, the prepared spherical cobalt powder has good appearance characteristics, the grain size of products can be controlled, and the cobalt conversion rate is up to more than 98%.