Metal powder producing apparatus and metal powder producing method

A metal powder producing apparatus comprising:

• a molten metal supply unit configured to discharge a molten metal;
• a cylinder body configured such that the molten metal discharged from the molten metal supply unit is received in the cylinder body;
• and
• a cooling liquid introduction unit configured to supply a cooling liquid to an upper portion of an inner circumference surface of the cylinder body, wherein
• the cylinder body and the cooling liquid introduction unit are configured such that a layer of the cooling liquid is formed on the inner circumference surface,
• a core axis direction of the cylinder body is inclined with respect to a vertical direction when the metal powder producing apparatus is in a use position,
• the upper portion of the inner circumference surface has an elliptical shape in planes perpendicular to the vertical direction,
• the cooling liquid introduction unit includes a cooling liquid discharge port configured to discharge the cooling liquid, supplied from outside the cylinder body, in a flow of the cooling liquid, which is a spiral orbit flow along the upper portion of the inner circumference surface,
• the cooling liquid discharge port has the elliptical shape in the planes perpendicular to the vertical direction, and
• a ratio of a long diameter to a short diameter in an ellipse defined by the inner circumference surface and the cooling liquid discharge port in the planes perpendicular to the vertical direction is 1.04 or more and 3.00 or less.