EP 1543172 B1 20091216 - PURIFICATION OF METAL PARTICLES BY HEAT PROCESSING
Title (en)
PURIFICATION OF METAL PARTICLES BY HEAT PROCESSING
Title (de)
REINIGUNG VON METALLPARTIKELN DURCH HITZEBEHANDLUNG
Title (fr)
PURIFICATION DE PARTICULES MÉTALLIQUES PAR TRAITEMENT THERMIQUE
Publication
Application
Priority
- GB 0304093 W 20030924
- GB 0222219 A 20020925
- GB 0222358 A 20020926
- GB 0222348 A 20020926
Abstract (en)
[origin: WO2004029332A2] A method for purifying metal Ml particles manufactured by an electrochemical reduction process, the method comprising the steps of introducing the metal M1 particles into a heat source (13) at a temperature substantially equal to or higher than the melting point of M1 so as to cause vaporisation of some or substantially all of the contaminating impurities present, removing the vaporised Impurities from the vicinity of the particles, and cooling the purified metal M1 particles. The purified particles can be used directly in lower temperature powder metallurgy processes and have fully dense spherical particle morphology, imparting good flowability. The purification process can also be incorporated as an integral stage of sheet or stock production processes based on particle feedstock's that have been produced by electrochemical reduction.
IPC 8 full level
C22B 34/12 (2006.01); B22F 3/18 (2006.01); B22F 5/00 (2006.01); C22B 9/14 (2006.01); C22B 9/22 (2006.01); C25C 3/28 (2006.01)
IPC 8 main group level
C25C (2006.01)
CPC (source: EP US)
C22B 9/14 (2013.01 - EP US); C22B 34/129 (2013.01 - EP US); C22B 34/1295 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IT LI LU MC NL PT RO SE SI SK TR
DOCDB simple family (publication)
WO 2004029332 A2 20040408; WO 2004029332 A3 20041021; AT E452214 T1 20100115; AU 2003271852 A1 20040419; AU 2003271852 B2 20100311; DE 60330577 D1 20100128; EP 1543172 A2 20050622; EP 1543172 B1 20091216; US 2006130610 A1 20060622; US 2012230860 A1 20120913
DOCDB simple family (application)
GB 0304093 W 20030924; AT 03753690 T 20030924; AU 2003271852 A 20030924; DE 60330577 T 20030924; EP 03753690 A 20030924; US 201213477368 A 20120522; US 52923405 A 20050831