PRODUCTION OF FERROMAGNETIC IRON POWDER

摘要

PURPOSE:To prevent the breaking and sintering of particles and to improve magnetic characteristics by feeding reducing gases having different dew points during and after heating when powder of iron oxide and/or oxide hydrate is heated and reduced. CONSTITUTION:When powder of iron oxide or iron-based metal oxide and/or oxide hydrate is heated and reduced in a vapor phase, a reducing gas having -10 to +15 deg.C dew point is fed during the heating and a reducing gas having <=-20 deg.C dew point is fed after the heating to reduce the powder.