Apparatus and methods for recovering valuable metals

Details Apparatus and methods for recovering valuable metals Apparatus and methods for recovering valuable metals

C - Chemistry, Metallurgy

22

B

C22B 11/00 (2006.01) B03B 7/00 (2006.01) C22B 1/00 (2006.01) C22B 3/02 (2006.01) C22B 3/20 (2006.01) C22B 11/12 (2006.01)

Patent

CA 2321703

Apparatus and method for continuously separating a dense valuable material such as gold from a feed including a grinding mill (2) which directs a crushed feed through hydrocyclones (9) for separation into a light and dense fraction. The dense fraction is concentrated further by In Line Pressure Jigs (16, l7) in line and the concentrate (23) is leached in a rotating leaching reactor (45). The resulting pregnant liquor is subjected to electrowinning (83) to recover gold and the spent liquor is recycled.

L'invention concerne un appareil et un procédé de séparation en continu d'une matière précieuse dense telle que de l'or à partir d'une charge, l'appareil comprenant un broyeur (2) qui envoie une charge broyée dans des hydrocyclones (9) pour la séparer en une fraction légère et une fraction dense. La fraction dense est ensuite concentrée d'avantage par des bacs à pistonnage par pression en ligne (16, 17) et le concentré (23) est lessivé dans un réacteur de lessivage (45) rotatif. La liqueur sursaturée obtenue est par la suite soumise à une extraction électrolytique (83) pour récupérer l'or et la liqueur résiduaire est recyclée.

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