C - Chemistry – Metallurgy – 25 – C
Patent
C - Chemistry, Metallurgy
25
C
C25C 3/14 (2006.01)
Patent
CA 2503902
A cell for the electrowinning of a metal (70) from a compound thereof dissolved in a molten electrolyte comprises: a thermally insulated cell trough (10,20) and a thermally insulated cell cover (30) which are arranged to contain an electrolyte (40) and maintain it in a substantially crustless molten state; and a feeder (50) for feeding a particulate (60) of the metal compound to the molten electrolyte (40). The feeder (50) comprises a feeding tube (51) extending into the cell trough (10,20) and has a tubular end portion (52) which is located between the molten electrolyte (40) and the insulating cell cover (30) and which has a substantially horizontal axial direction. The feeder (50) is arranged to feed the particulate (60) into the feeding tube (51), along the feeding tube (51) and through an opening (53) in the tubular end portion (52) from where it is delivered over the molten electrolyte (40). The opening (53) is located at an end of the tubular end portion (52) and is arranged to deliver the particulate (60) from the feeding tube (51) substantially along the axial direction of the tubular end portion (52). The end opening (53) can be coaxial with the tubular end portion (52) or off-axis.
L'invention concerne une cellule électrolytique pour l'extraction de métal (70) à partir d'un composé correspondant dissous dans un électrolyte fondu, qui comprend: un bac de cellule à isolation thermique (10,20) et un couvercle de cellule à isolation thermique (30) permettant de recueillir un électrolyte (40) et de le maintenir dans un état fondu sensiblement sans croûte; et un dispositif d'alimentation (50) de particules (60) du composé métallique vers l'électrolyte fondu (40). Le dispositif d'alimentation (50) comporte un tube d'alimentation (51) qui s'étend dans le bac (10,20), avec une extrémité tubulaire (52) située entre l'électrolyte fondu (40) et le couvercle (30) et qui a une direction axiale sensiblement horizontale. Ce dispositif (50) fournit les particules (60) au tube d'alimentation (51), le long de ce tube (51) et via une ouverture (53) dans l'extrémité tubulaire (52), aux fins de distribution sur l'électrolyte (40). L'ouverture (53) se trouve à un bout de l'extrémité tubulaire (52) et permet de distribuer les particules (60) depuis le tube (51) sensiblement le long de la direction axiale de l'extrémité tubulaire (52). L'ouverture (53) peut être coaxiale avec l'extrémité tubulaire (52) ou bien hors-axe.
de Nora Vittorio
Nguyen Thinh T.
Gowling Lafleur Henderson Llp
Moltech Invent S.a.
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