Electrodeposition of copper
AssigneeThe United States of America as represented by the Secretary of the Interior
InventorsDavid Schlain, Frank X. McCawley, Gerald R. Smith
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Abstract
The invention consists of a method for electrowinning or electrorefining of metals, particularly copper, comprising electrodepositing the metal from an electrolyte solution under conditions comprising high cathode and anode current densities and high velocity flow of electrolyte past the electrode surfaces. Current densities of about 60 to 400 amp/sq ft are employed, with electrolyte flow rates of at least 75 ft/min, preferably about 150 to 400 ft/min.
Claims1
A method for electrorefining or electrowinning of copper comprising electrodepositing the copper from an electrolyte consisting essentially of an aqueous solution of copper sulfate and sulfuric acid under conditions comprising cathode and anode current densities of about 60 to 400 amp/sq. ft. and a substantially non-turbulent flow of electrolyte past the electrode surfaces at a rate of about 150 to 400 ft/min, said non-turbulent flow being achieved by means of a venturi section and a single cathode-anode pair.
Dependencies are inferred from the claim text.