DEVICE AND METHOD FOR PREPARING ULTRAFINE SPHERICAL METAL POWDER USING DROP-BY-DROP CENTRIFUGAL ATOMIZATION METHOD

摘要

A device and method for preparing an ultrafine spherical metal powder by using a drop-by-drop centrifugal atomization method. The device comprises a housing (20), a crucible (2) provided in the housing (20), and a powder collection area. A turntable (8) provided in the powder collection area is an inlaid structure. A material with poor thermal conductivity is selected as a base portion of the turntable (8). A metal material that has a wetting angle of less than 90° with a droplet is selected and inlaid into a main portion as the atomizing plane of the turntable (8). A ventilation hole (24) is provided in the turntable (8). The method for preparing an ultrafine spherical metal powder by means of the drop-by-drop centrifugal atomization method mainly combines the two methods of a uniform droplet ejection method and a centrifugal atomization method, and surmounts a traditional metal splitting mode such that molten metal exhibits fibrous splitting, so that an ultrafine spherical metal powder that has a narrow particle size distribution range, high sphericity, good fluidity, excellent spreadability, a uniform and controllable size, and no satellite droplets may be efficiently prepared, and is suitable for industrial production.