Indirect determination of the waste gas rate for...

G - Physics – 01 – N

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G01N 33/20 (2006.01) C21C 5/30 (2006.01) C21C 5/38 (2006.01) C21C 5/46 (2006.01)

Patent

CA 2698398

1. Method for determining the waste gas rate in metallurgical processes 2.1 The invention is directed to a method for the indirect determination of the waste gas rate in metallurgical processes. 2.2 To this end, a reference gas such as helium is first added to the waste gas, specifically at a time which, with respect to flow, sufficiently precedes the taking of a sample such that a thorough mixing of the reference gas and waste gas is carried out, i.e., a virtually homogeneous distribution is achieved, and a quantitative helium analysis and nitrogen analysis of the waste gas, measured by a mass spectrometer, is carried out while taking into account the added amount of helium.

L'invention concerne un procédé de détermination indirecte du débit de gaz d'échappement dans des processus métallurgiques. A cet effet, on ajoute au gaz d'échappement, en premier lieu un gaz de référence, tel que l'hélium, à savoir, à un temps qui, au point de vue écoulement de fluide, se situe avant le prélèvement d'échantillon de telle façon que le gaz de référence soit mélangé à fond avec le gaz d'échappement, c'est-à-dire de façon qu'on obtienne une répartition quasi homogène, cependant qu'on effectue alors une analyse quantitative d'hélium et d'azote du gaz d'échappement, au moyen d'un spectromètre de masse, tout en tenant compte de la quantité d'hélium ajoutée.

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