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Donald J Quinn

Larry A Davis

Neil J Nebeker

Elmer C Newman

Timothy P Mulloy

Gregory H Boyce

David L Adamson

An electrowinning cell has anodes shielded by an electrical-flux-impervious, electrically non-conductive material which protectively covers each of the anode suspension members and adjoining upper margins of the main body of the anodes. At least one electrical-flux-pervious opening of proper shape, size, and appropriate position to permit sufficient current flux to flow to an associated cathode to induce a uniform current distribution on the upper portions of the cathode is provided for each suspension member. The resulting uniform current distribution insures deposition of highly pure metal values of uniform thickness without the usual undesirable extraneous formations on the top edge of the electrowon metal cathode. The shielding material may be applied to an anode before attachment to its hangerbar for suspension in an electrowinning cell or may be applied to an anode which is already in service.

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Apache Junction, AZ, United States of America

Donald J Quinn