What are the main equipment for copper electrolytic refining?
The product of copper pyrorefining is blister copper containing 99.0% to 99.6% copper. Due to its low purity, it cannot meet the requirements of industrialization. Therefore, it must be electrolytically refined to remove impurities that are difficult to remove in pyrotechnic refining. The pure copper sheet is used as the cathode, the cathode and anode are placed in the electrolytic cell, and the aqueous solution of sulfuric acid and copper sulfate is used as the electrolyte. Under the action of direct current, the copper on the anode dissolves and enters the solution, while the copper in the solution is on the cathode. Precipitate.
In this process, the metal with negative potential than copper on the anode enters the solution, but cannot be precipitated on the cathode, and remains in the electrolyte to be removed during the purification process of the electrolyte; noble metals and some metals have a higher potential than copper dissolution potential due to their positive potential It is insoluble and precipitates at the bottom of the tank to become anode slime. In this way, the metal copper precipitated on the cathode is of high purity, which is called cathode copper or electric copper.
1) Electrolytic cell: The electrolytic cell is the main equipment of the copper electrolysis workshop. It is a rectangular tank with anode plates and cathodes inside. There are liquid discharge outlet and mud discharge outlet in the tank. The electrolytic cell is generally constructed of reinforced concrete and lined with anti-corrosion resin, so that the cell body can play the role of supporting the cathode and anode, and can also play the role of anti-acid. The electrolytic cells are arranged on the support beams in turn, and the beams are covered with insulating materials to prevent the cell body from conducting electricity with the ground.
(2) Cathode making unit: The function of this unit is to make the cathode by embossing and flattening the copper skin peeled off from the titanium mother board, riveting ears (piercing rods), and then making the cathode row spacing to Ready to lift off by crane. Due to its unique function, the cathode manufacturing unit needs to be manufactured by a professional manufacturer. In the process of design and manufacture of the unit, the thickness of the copper skin and the processing capacity of the rivet ears should be considered.
(3) Anode processing unit: The function of this unit is to process the anode plate refined from the pyrolysis method to meet the standards required by the electrolysis process. Each process of the unit is: flattening the anode plate surface, setting the lugs, pressing the lugs, and the row spacing of the anode plates. In the design and manufacture of anode processing unit, the quality of each hydraulic seal and the processing capacity of anode plate should be fully considered.
(4) Electric copper washing unit: The function of this unit is to wash, dry, extract the conductive rods, stack, pack, and weigh the electric copper after it has been discharged from the tank. Many domestic copper electrolysis manufacturers do not use this unit, and rely on manual work to complete the various functions of the unit.
(5) Residual pole unit: The function of this unit is to wash, stack, pack, weigh, etc. the residual pole after being discharged from the tank, and then send the packaged residual pole to pyrorefining and redissolving. Due to the simple function of this unit, many domestic copper electrolysis manufacturers do not use this unit, and rely on manual work to complete the treatment of residual poles.
The above is the relevant introduction about the main equipment of copper electrolytic refining. The equipment technology of copper electrolytic refining plays a decisive role. SUNY GROUP has rich experience and first-class technology in copper electrolytic refining. It can customize different equipment according to the needs of customers. solution. If you need it, please feel free to contact us for consultation.
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