Method for producing zinc oxide powder and powder thus obtained

Details Method for producing zinc oxide powder and powder thus obtained Method for producing zinc oxide powder and powder thus obtained

C - Chemistry, Metallurgy

01

G

C01G 9/02 (2006.01) C09C 1/04 (2006.01) C22B 19/00 (2006.01)

Patent

CA 2686448

Method for producing hydrometallurgical zinc oxide powder having characteristics equivalent to that derived from a French process, comprising formation of an aqueous pulp from a starting zinc oxide having particles of nodular structure, wet milling of this aqueous pulp, separation in this milled pulp between 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, to obtain a dry zinc oxide powder with particles of nodular structure having a particle size distribution where the particles have an average size (d50) between 0.02 and 20 µm.

Procédé de production de poudre d'oxyde de zinc hydrometallurgique aux caractéristiques équivalente à celui issu d'un procédé français, comprenant une formation d'une pulpe aqueuse à partir d'un oxyde de zinc de départ présentant des particules de structure nodulaire, un broyage par voie humide de cette pulpe aqueuse, une séparation dans cette pulpe broyée entre une phase liquide et une phase solide contenant l'oxyde de zinc, et un séchage de ladite phase solide, couplé à une désagglomération mécanique des particules en cours de séchage, avec obtention d'une poudre sèche d'oxyde de zinc à particules de structure nodulaire présentant une distribution granulométrique où les particules ont une taille moyenne (d50) comprise entre 0,02 et 20 µm.

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