METHOD FOR PRODUCING HIGH-MELTING METAL POWDER BY MULTI-STAGE DEPTH REDUCTION

摘要

The invention relates to a method for producing a high-melting metal powder by multi-stage depth reduction and belongs to the technical field of powder production. The process involves the following steps of mixing dried refractory metal oxide powder with magnesium powder and performing a self-propagating reaction, placing an intermediate in a closed reaction kettle, leaching the intermediate with hydrochloric acid as a leaching solution, around a low valence MeO oxide precursor of the refractory metal to get with low valence; uniformly mixing the precursor with calcium powder, pressing the mixture, placing the pressed mixture in a vacuum reduction oven, heating the vacuum reduction oven to 700-1200 ° C, performing depth reduction for 1-6 hours, leaching a depth reduction product with hydrochloric acid as a leaching solution and carrying out the treatment to obtain the refractory metal powder.