Trapezoidal flow electrodeposition apparatus

Abstract

The invention discloses a trapezoidal flow electrodeposition apparatus. The apparatus comprises a liquid storage tank, a plurality of electrodeposition tanks, a liquid inlet main tube connected to the liquid outlet end of the liquid storage tank, a backflow tube connected between the liquid outlet ends of the electrodeposition tanks and the liquid inlet end of the liquid storage tank, and liquid inlet branch tubes arranged in the electrodeposition tanks, the tube orifices of the liquid inlet branch tubes are connected with the tube outlet of the liquid inlet main tube, the liquid inlet branch tubes are respectively provided with jet holes connected with the cavities of the liquid inlet branch tubes along the axial directions of the liquid inlet branch tubes, the cycle speed of an electrolyte in each of the electrodeposition tanks is controlled in a range of 75-105L / min, and the electrodeposition apparatus also comprises an electrolytic copper additive feeding device arranged in front of the liquid inlet branch tubes, and a heating device arranged in front of the liquid inlet branch tubes. The electrodeposition apparatus increases the cycle amount in each of the electrodeposition tanks by improving the cycle speed in each of the electrodeposition tanks, so cathode copper produced in the invention has high purity and good appearance quality, thereby the electrolyte in a copper refining process is effectively recycled.

Description

technical field [0001] The invention belongs to the technical field of electrolyte purification in nonferrous metal smelting, and in particular relates to a trapezoidal flow electrowinning device. Background technique [0002] At present, after copper is refined, in the process of purifying the electrolyte, the existing common measure is to separate the copper ions in the electrolyte, and then continue to return to the original electrolytic cell, and the precipitated copper ions are adsorbed on the cathode plate. Because most of the circulation volume used in the purification process is small at present, and the circulation mode is that the solution enters from the bottom or end of the tank and exits from the other end of the tank, the solution flows slowly and the distribution is uneven, and the metal near the cathode cannot be guaranteed. The ions are always at a high concentration. When the current density increases and the ion precipitation on the cathode is accelerated,...

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Problems solved by technology

Because most of the circulation volume used in the purification process is small at present, and the circulation mode is that the solution enters from the bottom or end of the tank and exits from the other end of the tank, the solution flows slowly and the distribution is uneven, and the metal near the cathode cannot be guaranteed. The ions are always at a relatively high concentration. When the current density increases and the ion precipitation on the cathode is accelerated, concentration polarization will inevitably occur. When the circulation volume is large, it will also cause the agitation of the sediment to make the solution turbid or cause the anode slime to float.

So far, the copper ions adsorbed on the cathode plate have poor appearance quality and cannot meet the requirements of the standard Cu-CATH-2 cathode copper in GB / T467-2010, so they can only be returned to the refining furnace as scrap copper for remelting. The waste of energy is unavoidable in the process of recycling, which increases the processing cost and the loss of copper ions during processing

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