Patent ID: 7939037

Claim:
Method of producing zinc oxide powder, comprising: calcination of zinc carbonate, basic zinc carbonate, or a zinc hydroxide, with production of a starting zinc oxide in the form of particles having a nodular structure, slow cooling of said starting zinc oxide in air, formation of an aqueous pulp of said cooled starting zinc oxide, continuous wet grinding of the aqueous pulp using microballs moved in the pulp to be ground so as to impact on each other and shear the pulp so as to obtain zinc oxide particles with a nodular structure having a granulometric distribution where the particles have a mean size (d50) of between 0.02 and 20 μm and a maximum size of 30 μm, separation of the ground pulp into a liquid phase and a solid phase containing the zinc oxide, and drying of said solid phase, coupled with a mechanical deagglomeration of the particles during drying, obtaining dry zinc oxide powder particles having a nodular structure and granulometric distribution.