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1. DK0699625 - Fremgangsmåde til raffinering af silicium

Amt Dänemark
Aktenzeichen/Anmeldenummer 95306100
Anmeldedatum 31.08.1995
Veröffentlichungsnummer 0699625
Veröffentlichungsdatum 25.05.1999
Erteilungsnummer
Erteilungsdatum 25.05.1999
Veröffentlichungsart T3
IPC
C01B 33/037
CSektion C Chemie; Hüttenwesen
01Anorganische Chemie
BNichtmetallische Elemente; deren Verbindungen
33Silicium; dessen Verbindungen
02Silicium
037Reinigung
CPC
C01B 33/037
CCHEMISTRY; METALLURGY
01INORGANIC CHEMISTRY
BNON-METALLIC ELEMENTS; COMPOUNDS THEREOF; ; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
33Silicon; Compounds thereof
02Silicon
037Purification
Anmelder Elkem ASA
Erfinder Schei, Anders
Prioritätsdaten 943227 01.09.1994 NO
Titel
(DA) Fremgangsmåde til raffinering af silicium
Zusammenfassung
(EN)
The present invention relates to a process for removing impurities from molten silicon by treatment of molten silicon (4) contained in a vessel (2) with a slag (5) having the capability of removing the impurities, particularly boron, from molten silicon. The slag (5) is continuously or substantially continuously added to the molten silicon (4) and then continuously or substantially continuously inactivated or removed from the silicon melt (4) as soon as equilibrium between the slag (6) and molten silicon (4) is reached with respect to the impurity elements or element to be removed.