Process for stabilization treatment of ferromagnetic metal powders.

摘要

Apparatus for the stabilizing treatment of ferromagnetic metal powders comprises a horizontal, cylindrical, rotatable reactor body (1) having a feed port (2) for introducing ferromagnetic metal powder into the reaction body, a withdrawal port (2) for removing treated ferromagnetic metal powder from the body; an inlet conduit (3) for introducing an oxidizing gas into the reactor body; and an outlet conduit (4) for removing oxidizing gas from the reactor body. Ferromagnetic metal powder is subjected to surface oxidation in the apparatus by passing oxidising gas through the reactor body whilst rotating it.