C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
39/106, 204/166,
C22B 9/05 (2006.01) B22D 1/00 (2006.01) C22B 21/06 (2006.01) C25B 1/24 (2006.01) C25B 9/00 (2006.01)
Patent
CA 2032572
Abstract The process for purifying a metal melt (10) operates with an active gas introduced into the lower region thereof and consisting of an inert carrier gas (30) and. an active, gaseous halogen (20) which are introduced under control into a vessel (12) with the stagnant or flowing metal melt (10). The active, gaseous halogen (20) is generated at a controlled rate in at least one gas evolution cell and introduced into the carrier gas. The active gas mixture is passed directly into the metal melt (10). The gas feed line (22) of the halogen does not have any control element. The gas evolution cell for generating the halogen (20) is preferably an exchangeable electrolysis cell (18), gas being produced only when the electrolysis current is switched on, which follows a nominal curve proportionally to the current intensity. (Figure 1)
Alusuisse-Lonza Services Ltd.
Buxmann Kurt
Swabey Ogilvy Renault
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