METHOD OF ELECTROLYTIC REFINING OF COPPER IN BLOCK-SERIES OF BATHS OF BOX TYPE Russian patent published in 2009 - IPC C25C1/12 

FIELD: metallurgy.

SUBSTANCE: invention refers to metallurgy, particularly to methods of electro-chemical refining of copper out of anodes with impurities of other metals. The method consists in electrolysis with anode dissolution of copper and its sedimentation on a cathode under effect of electric current with cathode density of current 220-330 A/m². Also there is performed a direct flow circulating supply of copper containing solution with colloid and concentration of free sulphuric acid 120-180 g/dm³. Electrolysis is carried out at 50-65°C temperature of solution at rate of its circulation from 12 to 30 dcm³/min. Concentration of copper in solution is maintained within ranges 35-65 g/dcm³. Voltage in the bath during electrolysis is supported at 0.25-0.6 V at daily withdrawal of part of volume of solution from block-series of baths constituing 1-4 % from the total volume; it is made up with condensate or copper containing solution.

EFFECT: increased efficiency of electrolysis process production and upgraded quality of cathode copper of MOOK grade produced out of materials with considerable amount of impurities in raw material.

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