METHOD FOR PRODUCING METALLIC ULTRA-FINE POWDER AND BURNER, AND APPARATUS FOR PRODUCING METALLIC ULTRA-FINE POWDER

摘要

PPROBLEM TO BE SOLVED: To provide a burner used for the method for producing metallic ultra-fine powder, which can use a raw material which is spread over a wide range, and control freely the grain size of the metallic powder to be produced, at low cost and high safety. PSOLUTION: The burner includes: a raw material atomizing hole 11 for atomizing a liquid raw material containing a metallic compound dissolved in an organic solvent, a plurality of primary oxygen jetting orifices 22 disposed circularly around a center of the raw material atomizing hole, for jetting oxygen or oxygen-enriched air parallel to a center line of the raw material atomizing hole, and a plurality of secondary oxygen jetting orifices 32 disposed circularly around a center of the raw material atomizing hole and outward from the primary oxygen jetting orifices, for jetting oxygen or oxygen-enriched air toward a point on a line extended from the central line of the raw material atomizing hole. The burner generates a high temperature reductive airflow from the organic solvent and oxygen or oxygen-enriched air to reduce the metallic compound, thereby producing metallic ultra-fine powder. PCOPYRIGHT: (C)2009,JPO&INPIT