DEVICE AND METHOD FOR CONTROLLING NON-IRON MELTING PROCESS

摘要

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).