Atomizing method and device for preparing superfine near-spherical low-oxygen metal powder

The invention discloses an atomizing method and device for preparing superfine near-spherical low-oxygen metal powder. The method includes the step that molten metal liquid flow is broken into liquid drops through high-pressure gas; the liquid drops are broken multiple times through high-pressure water to form finer liquid drops and contract to be in a near-spherical shape in an atomizing cylinder in the flying process; and finally, the liquid drops are solidified to be the superfine near-spherical low-oxygen metal powder. According to the device, compared with traditional gas atomization, the breaking function of high-pressure water is added, and powder is finer in size; due to the fact that the breaking effect of gas is added, the amount of atomizing water is greatly reduced, the contracting process of powder is prolonged, and the degree of sphericility is better than that in traditional water atomization; and in addition, the whole atomization process is conducted in inert protective gas, and therefore the oxygen content of powder is reduced. Furthermore, the technology is advanced and reliable, the technology device is simple, continuity is high, production cost is low, product performance is stable, and the atomizing method and device are suitable for industrial production and can be widely applied to the metal injection molding industry.