C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
C25C 3/22 (2006.01) B01D 45/02 (2006.01) B01D 53/68 (2006.01) B03B 4/06 (2006.01) B07B 4/02 (2006.01) C01F 7/46 (2006.01)
Patent
CA 2344545
Method for reducing the pressure drop, increasing the capacity and improving the degree of separation in dry cleansing plants for exhaust gas from aluminium reduction furnaces, in which at least partly selectively to separate fine grain particular fluoride from the recycled alumina in the process. A device comprises one or more inclined planes for gravimetric down flow of alumina, and that the devices are provided to lead an ascending air or gas stream to blow the grained particular fluoride out of the stream of alumina.
Procédé servant à limiter la chute de pression, à augmenter la capacité et à améliorer le degré de séparation dans des installations de nettoyage à sec de gaz d'échappement provenant de fours de réduction d'aluminium, ce qui consiste à séparer au moins partiellement de façon sélective les particules fines de fluorure de l'alumine recyclée dans le traitement. Dispositif comprenant un ou plusieurs plans inclinés permettant à l'alumine de s'écouler vers le bas sous l'effet de la gravité, et conçu pour véhiculer un courant ascendant d'air ou de gaz soufflant sur l'écoulement d'alumine afin d'en séparer les particules fines de fluorure.
Bjarno Odd E.
Bockman Ole K.
Abb Flakt Ab
Smart & Biggar
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