Electrolytic refining of copper: the blister copper (Cu 99%) pre-made plate as the anode, made of copper sheet as the cathode, sulfuric acid (H2SO4) and copper sulfate (CuSO4) in the mixed liquid as the electrolyte. Power, the anodic dissolution of copper from the copper ion (Cu) move to the cathode, the electrons reach the cathode obtained after precipitation of copper in cathode (also known as copper). Blister copper than copper impurities such as iron and zinc lively copper will be dissolved together with the ion (Zn and Fe). Because these ions and the precipitation of copper ions than not, so electrolytic potential difference as long as appropriate adjustments to avoid the precipitation of these ions in the anode. Inactive impurities than copper, such as gold and silver deposited on the bottom of the cell. This produced the coin, known as the "copper", high quality, can be used to make electrical products. Settle in the bottom of the cell known as "anode mud", which is rich in gold and silver, is very expensive, take out the re-processing has high economic value.
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