C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
204/148, 204/48,
C25C 3/06 (2006.01) C25C 3/08 (2006.01)
Patent
CA 1173782
ABSTRACT OF THE DISCLOSURE In an aluminum electrolytic cell in which alumina is electrolyzed by electric current flowing between an anode electrode and a cathode electrode, ferromagnetic rods are disposed on the anode electrode in parallel with a shorter end wall of the cell. A magnetic field having a vertical component having a gradient is created in the cell by the current. The ferromagnetic rods are magnetized by a horizontal component of this magnetic field created by the current to produce a second magnetic field containing a vertical component that decreases a gradient of the vertical magnetic member may be disposed above or below an aluminum metal layer or above the anode electrode. In the last mentioned case, a ferromagnetic bar may be wound about an anode supporting rod to form a coil having opposite terminals extending in the horizontal direction. According to this invention, it is possible to decrease fluctuation of an interface between an electrolyte bath and the aluminum metal layer so as to stabilize the same and to operate the cell at high current efficiencies.
387551
Arita Yoji
Macrae & Co.
Mitsubishi Keikinzoku Kogyo Kabushiki Kaisha
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