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Persona de contacto Ke
BaiZiwan, Beijing
Principle In the electrolytic trough refining of copper , refined copper by fire as the anode, copper sheet (beginning pole piece) as the cathode, the electrolyte is a copper sulfate solution containing free sulfuric acid. Electrolytes dissociate ions in solution:
CuSO4≒Cu2++SO**-
H2O≒H++OH-
H2SO4≒2H++SO**-
The standard of electrode potential of copper is 0.*4V, it has more than fire refining of copper, except precious metals other than to correct the electrode potential impurities. Thus, in the electrolysis process, as long as control certain process conditions, the role of the DC, then copper anode will has a chemical dissolution:
Cu*2e→Cu2+
Constantly thinning reduced; and in the beginning of a very pure copper cathode copper ions occurs on-chip reduction reaction
Cu2+*2e→Cu
The cathode reduction of copper was deposited on-chip, so that the cathode film becomes more and more thick. More negative electrode potential than copper ions remain in the electrolyte, and electrode potential than copper, precious metals and some compounds corrected does not occur at the anode discharge dissolved to form the anode deposition of mud bottom, in order to achieve the separation of copper and impurities.