Method of producing zinc oxide powder

US7939037B2 · kind B2 · utility

Assignee

• ZINCOX RESOURCES PLC · GB

Inventors

• Kevin Clais · Tournai, BE
• Duncan Turner · Herfelingen, BE
• Philippe Leblanc · Toronto, CA
• Antoine Masse · Tournai, BE

Key dates

• Filing date: May 6, 2008
• Grant date: May 10, 2011
• Expiry date: May 6, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C01P2006/80
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

Abstract

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.