Electrowinning metal in diaphragm cell with smooth cathode

Details Electrowinning metal in diaphragm cell with smooth cathode Electrowinning metal in diaphragm cell with smooth cathode

C - Chemistry, Metallurgy

25

C

204/161, 204/66

C25C 5/02 (2006.01) C25C 1/18 (2006.01)

Patent

CA 1234070

ABSTRACT OF THE DISCLOSURE The present invention is a process for preparing a lead or copper metal by electrolysis in a cell having a cathode and an anode which are separated by a diaphragm, which comprises the steps of preparing an electrolyte containing a metal chloride to be prepared in at least one chloride of an alkali metal or alkaline-earth metal; circulating the electrolyte between the cathode and the anode parallel to the surface of the cathode, wherein the surfaces of the cathode are arranged in substantially a vertical direction and have a sufficiently low density of sites of nucleation so that the metallic particles which are formed on the sites keep their individuality in relation to the adjacent particles, until the particles reach a dimension of at least about 100 micrometers; maintaining the flow of the electrolyte along the length of the surface of the cathode in a laminar or weakly turbulent manner so that, under the action of their weight and of the forces exercised by the current of the electrolyte, the metallic particles are detached and fall into the electrolyte; and removing the metallic particles grouped at the bottom of the cell. The present invention also relates to an apparatus utilized in the process of preparing a lead or copper metal.

427508

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