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1. (WO2014202157) DEVICE AND METHOD FOR CONTROLLING NON-IRON MELTING PROCESS

Pub. No.:    WO/2014/202157    International Application No.:    PCT/EP2013/068282
Publication Date: Thu Dec 25 00:59:59 CET 2014 International Filing Date: Thu Sep 05 01:59:59 CEST 2013
IPC: F27D 7/02
B22D 21/00
C22B 9/05
C22B 26/22
F27D 7/06
Applicants: ABB RESEARCH LTD
Inventors: KRAMER, Axel
PAUL, Thomas Alfred
Title: DEVICE AND METHOD FOR CONTROLLING NON-IRON MELTING PROCESS
Abstract:
A furnace (10) for non-iron metals and a method of operating it are disclosed with a monitoring system (12) for monitoring in-situ the concentration of a passivation fluid,such as perfluoroketones in a cover gas(136). The monitoring system (12) includes a sensor (122) for determining an emission and/or an absorption of the passivation fluid at least one wavelength or wave- length band of the electromagnetic wave spectrum, with the measured concentration being used as a control input for a flow control system (13) controlling the supply of the cover gas (136) into the furnace (10).