EP 0044794 B1 19841128 - PROCESS AND APPARATUS FOR ACCURATELY REGULATING THE FEEDING RATE AND THE ALUMINA CONTENT OF AN IGNEOUS ELECTROLYSIS, AND USE THEREOF IN THE PRODUCTION OF ALUMINIUM
Title (en)
PROCESS AND APPARATUS FOR ACCURATELY REGULATING THE FEEDING RATE AND THE ALUMINA CONTENT OF AN IGNEOUS ELECTROLYSIS, AND USE THEREOF IN THE PRODUCTION OF ALUMINIUM
Publication
Application
Priority
FR 8016406 A 19800723
Abstract (en)
[origin: ES8302124A1] A process and apparatus for controlling the rate of introduction and the content of alumina to a tank for the production of aluminium by the electrolysis of dissolved alumina in a cryolite-base bath, the upper part of which forms a solidified crust, and wherein the alumina content is maintained within a narrow range, of between 1% and 3.5%, wherein the alumina is introduced directly into the molten cryolite bath by way of at least one opening which is kept open in the solidified crust and the rate at which the alumina is introduced is modulated relative to variations in the internal resistance of the tank during predetermined periods of time, with alternation of the cycles of introducing alumina at a slower rate and at a faster rate than the rate corresponding to normal consumption within the tank.
IPC 1-7
IPC 8 full level
C25C 3/14 (2006.01); C25C 3/06 (2006.01); C25C 3/20 (2006.01)
CPC (source: EP KR US)
C25C 3/06 (2013.01 - KR); C25C 3/14 (2013.01 - EP KR US); C25C 3/20 (2013.01 - EP US)
Designated contracting state (EPC)
AT CH DE LI NL SE
DOCDB simple family (publication)
EP 0044794 A1 19820127; EP 0044794 B1 19841128; AT E10514 T1 19841215; AU 549056 B2 19860109; AU 7319881 A 19820128; BR 8104735 A 19820413; CA 1157803 A 19831129; DE 3167452 D1 19850110; ES 504180 A0 19821216; ES 514946 A0 19830501; ES 8302124 A1 19821216; ES 8306192 A1 19830501; FR 2487386 A1 19820129; FR 2487386 B1 19840914; GB 2080830 A 19820210; GB 2080830 B 19831005; GR 74283 B 19840621; HU 187339 B 19851228; IN 154431 B 19841027; JP S5751278 A 19820326; JP S6037197 B2 19850824; KR 830006476 A 19830924; KR 850001767 B1 19851209; NO 157906 B 19880229; NO 157906 C 19880608; NO 812512 L 19820125; NZ 197748 A 19850731; OA 06862 A 19830228; PL 134831 B1 19850930; PL 232287 A1 19820301; RO 82685 A 19840512; RO 82685 B 19840630; SK 278294 B6 19960904; SK 545081 A3 19960904; US 4431491 A 19840214; YU 174581 A 19840229; YU 44417 B 19900831
DOCDB simple family (application)
EP 81420104 A 19810715; AT 81420104 T 19810715; AU 7319881 A 19810722; BR 8104735 A 19810722; CA 382300 A 19810722; DE 3167452 T 19810715; ES 504180 A 19810722; ES 514946 A 19820812; FR 8016406 A 19800723; GB 8122533 A 19810722; GR 810165562 A 19810720; HU 215581 A 19810723; IN 638CA1981 A 19810612; JP 11500481 A 19810722; KR 810002673 A 19810723; NO 812512 A 19810722; NZ 19774881 A 19810717; OA 57453 A 19810717; PL 23228781 A 19810720; RO 10494281 A 19810721; SK 545081 A 19810716; US 28481281 A 19810720; YU 174581 A 19810715