Abstract: Provided is an electrode assembly for electrolytic processing in an electrolysis cell comprising an electrode blade comprising a metallic hanger bar portion, a first lug for supporting the metallic hanger bar portion on a first power supply bar, an insulating piece connecting the metallic hanger bar portion to the first lug. The electrode assembly also comprises an electrical switch unit controlling electrical current supply between the first lug and the metallic hanger bar based on a control signal transmitted to a terminal of the electrical switch unit, a control unit configured to transmit the control signal to the terminal of the electrical switch unit, and a power storage unit configured to supply power to the control unit, the power storage unit being charged from the first lug and the hanger bar when the electrical switch unit switches off electrical current supply between the first lug and the metallic hanger bar.

Abstract: The invention concerns a bubble collector guide for use in an electrolysis process, which comprises a plurality of guide members arranged at a distance from each other, the guide members comprising a lower side. The guide members can be arranged horizontally on the vertical surface of an electrode so that the lower side of the guide member forms a downwards facing surface that is substantially orthogonal to the vertical surface of the electrode, so as to collect bubbles of gas generated at the electrode.

Abstract: The invention relates to a method for electrowinning a metal from an electrolyte in an electrowinning cell that comprises an electrolysis tank, one or more anodes, and one or more cathodes, which anodes and cathodes are housed in the electrolysis tank. The method comprises supplying sulfur dioxide to the anode to depolarize the anode process and to reduce the energy consumption of the electrowinning cell.

Abstract: A method for maintenance of used permanent cathode plates, said used cathode plate having scratches, crud formations and oversize grain boundaries on a surface of the cathode plate. The method comprises removing of scratches and accumulated crud from the surface of the cathode plate. The method further comprises removing substantially completely the oversize grain boundaries from the surface, and thereafter regenerating the grain boundaries of the surface of the cathode plate to an average grain boundary width of 1 to 3 ?m and an average grain boundary depth less than 1 ?m.

Abstract: The invention relates to a method and current measuring arrangement for measuring electric current flowing in an individual electrode in an electrolysis system. The electrolysis system comprises a plurality of interleaved electrodes (1, 2), cathodes (1) and anodes (2), arranged in an electrolysis cell (3) and immersed in electrolyte, said electrolysis system having a busbar (4) disposed on a separating cell wall (5) between each of the two adjacent cells to conduct electric current to the electrodes via a contact point (6) between the busbar and a hanger bar (7) of the electrode, and the current sensing arrangement comprises a magnetic field sensing means (8; 81, 82; 10) for measuring the magnetic field induced by said current. The magnetic field sensing means (8; 81, 82; 10) are arranged to sense the magnetic field substantially at the level of the contact point (6).

Abstract: The invention relates to a method and current measuring arrangement for measuring electric current flowing in an individual electrode in an electrolysis system. The electrolysis system comprises a plurality of interleaved electrodes (1, 2), cathodes (1) and anodes (2), arranged in an electrolysis cell (3) and immersed in electrolyte, said electrolysis system having a busbar arrangement (4) disposed on a separating cell wall (5) between each of the two adjacent cells. The busbar arrangement comprises an equalizer busbar (6, 7, 8, 9, 10, 11) to electrically connect anodes in one cell to cathodes in a next cell providing the current with multiple electrical pathways between electrodes, said electrical connection being formed by contact points (12) between the equalizer busbar (6, 7, 8, 9, 10, 11) and hanger bars (13) of the electrodes.

Abstract: A method for maintenance of used permanent cathode plates, said used cathode plate having scratches, crud formations and oversize grain boundaries on a surface of the cathode plate. The method comprises removing of scratches and accumulated crud from the surface of the cathode plate. The method further comprises removing substantially completely the oversize grain boundaries from the surface, and thereafter regenerating the grain boundaries of the surface of the cathode plate to an average grain boundary width of 1 to 3 ?m and an average grain boundary depth less than 1 ?m.

Abstract: Provided is an electrode assembly for electrolytic processing in an electrolysis cell comprising an electrode blade comprising a metallic hanger bar portion, a first lug for supporting the metallic hanger bar portion on a first power supply bar, an insulating piece connecting the metallic hanger bar portion to the first lug. The electrode assembly also comprises an electrical switch unit controlling electrical current supply between the first lug and the metallic hanger bar based on a control signal transmitted to a terminal of the electrical switch unit, a control unit configured to transmit the control signal to the terminal of the electrical switch unit, and a power storage unit configured to supply power to the control unit, the power storage unit being charged from the first lug and the hanger bar when the electrical switch unit switches off electrical current supply between the first lug and the metallic hanger bar.

Abstract: The invention relates to a method for electrowinning a metal from an electrolyte in an electrowinning cell that comprises an electrolysis tank, one or more anodes, and one or more cathodes, which anodes and cathodes are housed in the electrolysis tank. The method comprises supplying sulfur dioxide to the anode to depolarize the anode process and to reduce the energy consumption of the electrowinning cell.

Abstract: The invention relates to a method and current measuring arrangement for measuring electric current flowing in an individual electrode in an electrolysis system. The electrolysis system comprises a plurality of interleaved electrodes (1, 2), cathodes (1) and anodes (2), arranged in an electrolysis cell (3) and immersed in electrolyte, said electrolysis system having a busbar arrangement (4) disposed on a separating cell wall (5) between each of the two adjacent cells. The busbar arrangement comprises an equaliser busbar (6, 7, 8, 9, 10, 11) to electrically connect anodes in one cell to cathodes in a next cell providing the current with multiple electrical pathways between electrodes, said electrical connection being formed by contact points (12) between the equaliser busbar (6, 7, 8, 9, 10, 11) and hanger bars (13) of the electrodes.

Abstract: The invention relates to a method and current measuring arrangement for measuring electric current flowing in an individual electrode in an electrolysis system. The electrolysis system comprises a plurality of interleaved electrodes (1, 2), cathodes (1) and anodes (2), arranged in an electrolysis cell (3) and immersed in electrolyte, said electrolysis system having a busbar (4) disposed on a separating cell wall (5) between each of the two adjacent cells to conduct electric current to the electrodes via a contact point (6) between the busbar and a hanger bar (7) of the electrode, and the current sensing arrangement comprises a magnetic field sensing means (8; 81, 82; 10) for measuring the magnetic field induced by said current. The magnetic field sensing means (8; 81, 82; 10) are arranged to sense the magnetic field substantially at the level of the contact point (6).

Abstract: The invention concerns a bubble collector guide for use in an electrolysis process, which comprises a plurality of guide members arranged at a distance from each other, the guide members comprising a lower side. The guide members can be arranged horizontally on the vertical surface of an electrode so that the lower side of the guide member forms a downwards facing surface that is substantially orthogonal to the vertical surface of the electrode, so as to collect bubbles of gas generated at the electrode.

Abstract: The invention relates to a method for producing wood anti-rot agent of the copper-arsenic precipitate created in the solution purification of copper electrolysis, or of some other corresponding precipitate.