Patent ID: 8979975
Filing Date: 2015-03-17
Classification: B22F

Abstract:
1. A method of producing molybdenum powders having a particle size of 5 μm or less and an oxygen content of 3000 ppm or less by reducing molybdenum trioxide, the method comprising: charging a first reducing agent and the molybdenum trioxide on a micro-sieve, which is located on an upper portion of a bracket installed in a body, while the first reducing agent and the molybdenum trioxide are directly making contact with each other; charging a second reducing agent in the bracket under the micro-sieve; coupling the body with a cover to close the body; and performing a reduction reaction by raising an internal temperature of the body, wherein the first reducing agent and the second reducing agent comprise calcium powders, and the calcium powders constituting the first reducing agent have a particle size different from a particle size constituting the second reducing agent.