EP 0041142 B1 19830629 - PROCESS FOR PREPARING ACICULAR FERROMAGNETIC PARTICLES MAINLY CONSISTING OF IRON
Title (en)
PROCESS FOR PREPARING ACICULAR FERROMAGNETIC PARTICLES MAINLY CONSISTING OF IRON
Publication
Application
Priority
DE 3021111 A 19800604
Abstract (en)
[origin: US4378240A] A process for the preparation of acicular ferromagnetic metal particles, consisting essentially of iron, by reducing acicular iron oxides and/or iron oxide hydroxides, which are either pure or are modified with conventional foreign metal ions, by means of a gaseous reducing agent in a fluidized bed furnace in which a stirrer is provided immediately above the fluidizing grid.
IPC 1-7
IPC 8 full level
B01J 8/38 (2006.01); B22F 9/22 (2006.01); F27B 15/02 (2006.01); H01F 1/06 (2006.01)
CPC (source: EP US)
B22F 9/22 (2013.01 - EP US); H01F 1/065 (2013.01 - EP US)
Designated contracting state (EPC)
DE FR GB NL
DOCDB simple family (publication)
EP 0041142 A1 19811209; EP 0041142 B1 19830629; DE 3021111 A1 19811217; DE 3160523 D1 19830804; JP H0269938 U 19900528; JP H0431234 Y2 19920728; JP S5723010 A 19820206; US 4378240 A 19830329
DOCDB simple family (application)
EP 81103507 A 19810508; DE 3021111 A 19800604; DE 3160523 T 19810508; JP 12572289 U 19891030; JP 8453381 A 19810603; US 26810881 A 19810528