Hydrometallurgical leaching process and apparatus

Details Hydrometallurgical leaching process and apparatus Hydrometallurgical leaching process and apparatus

C - Chemistry, Metallurgy

22

B

53/369, 23/412

C22B 3/02 (2006.01) C22B 3/04 (2006.01) C22B 15/00 (2006.01) C22B 19/20 (2006.01) C22B 60/02 (2006.01)

Patent

CA 2008063

A process and apparatus for leaching metal values from a particulate mineral ore containing metal values employs a fluidized bed of the particles; a leaching agent solution containing dissolved oxygen flows upwardly of the bed in a lower leaching zone, to an upper clarification zone; a velocity profile is maintained to promote settling of particles so that the particulate solids remain in the leaching zone and a clarified leachant-containing liquid low in suspended solids rises and collects in the clarifi- cation zone; the process is carried out with a minimum of undissolved gas and avoids the need for mechanical agitation, but the kinetics of the chemical leaching reaction is improved and heat loss via escaping gases is avoided.

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