A kind of preparation method of zinc electrowinning anode
A zinc electrowinning and anode technology, applied in electrodes, electrolytic components, electrolytic processes, etc., can solve the problems of high oxygen evolution overpotential, low mechanical strength, and short service life, and achieve low oxygen evolution overpotential and high mechanical strength , long service life effect
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Embodiment 1
[0025] Take lead powder with an average particle size of 40 μm, silver powder with an average particle size of 8 μm, and lead dioxide powder with an average particle size of 20 μm, and mix them according to the mass ratio of lead powder: silver powder: lead dioxide powder: 94.5:0.5:4. The powder after batching was rolled and mixed with a roller ball mill for 3 hours. Put the mixed powder into the mold and press it with a press for 50s under the pressure of 2MPa. The pressed material was put into a sintering furnace and hydrogen gas was introduced, and the sintering temperature was 320°C for isothermal sintering for 6 hours. After the sintering was completed, the material was taken out of the sintering furnace and cooled to room temperature naturally.
[0026] The anode prepared above, in 160g / L of H 2 SO 4 , 50g / L of Zn 2+ In solution, at a temperature of 35°C and a current density of 500A / m 2 The electrodeposition results show that the oxygen evolution overpotential of th...
Embodiment 2
[0029] Take lead powder with an average particle size of 30 μm, silver powder with an average particle size of 3 μm, lead dioxide powder with an average particle size of 12 μm, and cerium dioxide powder with an average particle size of 10 μm, according to lead powder: silver powder: lead dioxide powder: cerium dioxide The powder quality configuration is 94.5:0.5:3:1 for batching. The powder after batching was rolled and mixed with a roller ball mill for 5 hours. Put the mixed powder into the mold, and press it with a press for 100s under the pressure of 2MPa. The pressed material was put into a sintering furnace and hydrogen gas was introduced, and the sintering temperature was 325°C for isothermal sintering for 6 hours. After the sintering was completed, the material was taken out of the sintering furnace and cooled to room temperature naturally.
[0030] The anode prepared above, in 160g / L of H 2 SO 4 , 50g / L of Zn 2+ In solution, at a temperature of 35°C and a current d...
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