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Brief description of the treatment of liquid effluents in a chloride medium and separation of the zinc and nickel, for its implementation and application to the industrial effluents metalliferous
Brief description of the treatment of liquid effluents in a chloride medium and separation of the zinc and nickel, for its implementation and application to the industrial effluents metalliferous
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机译：氯化物介质中液体废水的处理以及锌和镍的分离的简要说明，以用于在含金属工业废水中的实施和应用
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摘要
The process comprises conducting electrolysis of zinc and nickel solution in an electrolytic tank (1) for dezincification and for nickel separation. The tank comprises: a cathode chamber that is charged with the zinc and nickel solution as a catholyte and is equipped with a metal cathode (4), where zinc is deposited when the cathodic solution is dezincified and nickel is deposited; and an anode chamber that is charged in an acid medium such as sulfuric acid as an anolyte and is equipped with a anode (9). The cathode and anode chambers are separated by a cationic ion exchange membrane (6). The process comprises conducting electrolysis of zinc and nickel solution in an electrolytic tank (1) for dezincification and for nickel separation. The tank comprises: a cathode chamber that is charged with the zinc and nickel solution as a catholyte and is equipped with a metal cathode (4), where zinc is deposited when the cathodic solution is dezincified and nickel is deposited; and an anode chamber that is charged in an acid medium such as sulfuric acid as an anolyte and is equipped with a anode (9). The cathode and anode chambers are separated by a cationic ion exchange membrane (6). The effluent is pretreated by adding sulfuric acid and separating formed precipitate. The electrolytic tank for dezincification has pH value of 2+- 0.2. A potential of the cathode in the tank is -700 to -750 mV. A temperature at which the electrolysis is conducted in the electrolytic cell for dezincification is 20-30[deg] C. The electrolytic tank for nickel separation has pH value of 0.5+- 0.2. A potential of the cathode in the tank for nickel separation is -450 to -550 mV. A temperature at which the electrolysis is conducted in the electrolytic cell for nickel separation is 60-70[deg] C. An independent claim is included for an installation for treating liquid effluent.
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