EP 0102892 B1 19861210 - PROCESS FOR MANUFACTURING HIGH PURITY METALS AND ALLOYS
Title (en)
PROCESS FOR MANUFACTURING HIGH PURITY METALS AND ALLOYS
Publication
Application
Priority
FR 8214386 A 19820820
Abstract (en)
[origin: US4504310A] A process for the production of high purity metals or metallic alloys comprises the steps of: (a) producing a metal or metallic alloy, the non-metallic inclusions of which are, preferably, easily reducible oxides of the base metal; (b) milling the metal or metallic alloy thus obtained and agglomerating the milled metal or metallic alloy with an agglomerating agent and a reducing agent, so as to form balls; and (c) subjecting the balls to a reducing treatment under regulated conditions of reduced pressure and elevated temperature, at which the reducing agent acts on the non-metallic inclusions while substantial sublimation of the alloying metal or metals is avoided. The invention is particularly applicable to the production of high purity chromium.
IPC 1-7
IPC 8 full level
C22B 1/24 (2006.01); C22B 1/244 (2006.01); C22B 1/245 (2006.01); C22B 5/02 (2006.01); C22B 5/04 (2006.01); C22B 5/10 (2006.01); C22B 34/12 (2006.01); C22B 34/22 (2006.01); C22B 34/24 (2006.01); C22B 34/32 (2006.01); C22B 34/34 (2006.01); C22B 34/36 (2006.01); C22B 47/00 (2006.01); C22C 1/00 (2006.01)
CPC (source: EP US)
C22B 1/2406 (2013.01 - EP US); C22B 1/244 (2013.01 - EP US); C22B 1/245 (2013.01 - EP US); C22B 5/04 (2013.01 - EP US); C22B 34/32 (2013.01 - EP US); Y10S 75/959 (2013.01 - US)
Designated contracting state (EPC)
AT BE CH DE FR GB IT LI LU NL SE
DOCDB simple family (publication)
EP 0102892 A1 19840314; EP 0102892 B1 19861210; AT E24205 T1 19861215; DE 3368288 D1 19870122; FR 2531978 A1 19840224; FR 2531978 B1 19850712; JP H0261531 B2 19901220; JP S5956540 A 19840402; US 4504310 A 19850312; US 4504310 B1 19940315; ZA 835957 B 19840425
DOCDB simple family (application)
EP 83401671 A 19830817; AT 83401671 T 19830817; DE 3368288 T 19830817; FR 8214386 A 19820820; JP 15236783 A 19830819; US 52080283 A 19830805; ZA 835957 A 19830812