Method for preparing metal hafnium powder through vacuum carbon reduction

Abstract

The invention belongs to the technical field of vacuum metallurgy, discloses a method for preparing high-purity metal hafnium powder through hafnium dioxide vacuum carbon thermal reduction, and in particular, provides a method for preparing metal hafnium powder through reducing hafnium dioxide by graphite powder in vacuum. The method has the advantages of simple production process, low equipment investment, high metal yield of 95-98%, low production cost and prominent economic benefit, and is a process with low cost and high yield and suitable for large-scale preparation of high-purity and fine-granularity metal hafnium powder.

Description

technical field [0001] The invention belongs to the technical field of vacuum metallurgy, in particular to a method for preparing high-purity metal hafnium powder by vacuum carbothermal reduction of hafnium dioxide, and in particular provides a method for preparing metal hafnium powder by reducing hafnium dioxide with graphite powder in vacuum Methods. Background technique [0002] Hafnium is a high-melting refractory metal with an atomic weight of 178.49 and a melting point of 2222 (±30°C). Metal hafnium has excellent processing properties and can be forged and drawn. But the most important thing is the nuclear performance of hafnium, which has an excellent thermal neutron capture cross section and can be used as a control material for nuclear reactors. Metal hafnium has excellent corrosion resistance in air, and its reaction with gas is similar to that of zirconium, and it is compatible with oxygen, Nitrogen reacts at a lower rate than zirconium. The corrosion resistan...

AI Technical Summary

Problems solved by technology

The purpose of the present invention is to overcome the problems of low purity and high metal impurity content in the prior art by reducing hafnium dioxide to hafnium powder by vacuum carbothermal reduction of graphite powder