A new high-efficiency joint additive for zinc electrowinning
An additive and zinc electrowinning technology, applied to the improvement of process efficiency, instruments, optics, etc., to achieve the effects of improving precipitation quality, increasing cathode current efficiency, and reducing energy consumption
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Embodiment 1
[0013] Current density 500A / m 2 , the electrolyte temperature is 35~40°C, the same pole distance is 60mm, the electrolysis cycle is 48h, the new electrolysis solution contains zinc 150g / L, and the pH value is 5~6; the electrolysis waste solution contains zinc 50~55g / L, sulfuric acid 155~165g / L . The cathode plate is a rolled pure aluminum plate, and the anode plate is a lead plate containing 1% silver. The electrolyte adopts the cycle system of top in and bottom out, that is, the waste liquid overflowing from the electrowinning cell is mixed with new liquid in a certain proportion and then reused. Generally, the mixing volume ratio of new liquid and waste liquid is 1:5~1:10. Adding 0.1 g / L bone glue, the current efficiency is 88.48%, and the DC power consumption is about 2966 kwh / t Zn. Under the same conditions, adding a combined additive consisting of 0.1 g / L bone glue, 0.05 g / L aloe gel, and 0.015 g / L cetylpyridinium chloride, the current efficiency is 90.54%, and the DC p...
Embodiment 2
[0015] Current density 550A / m 2 , the electrolyte temperature is 35~40°C, the same pole distance is 65mm, the electrolysis cycle is 24h, the new electrolysis solution contains zinc 150g / L, and the pH value is 5~6; the electrolysis waste solution contains zinc 50~55g / L, sulfuric acid 155~165g / L . The cathode plate is a rolled pure aluminum plate, and the anode plate is a lead plate containing 1% silver. The electrolyte adopts the cycle system of top in and bottom out, that is, the waste liquid overflowing from the electrowinning cell is mixed with new liquid in a certain proportion and then reused. Generally, the mixing volume ratio of new liquid and waste liquid is 1:5~1:10. Adding 0.15 g / L bone glue, the current efficiency is 88.25%, and the DC power consumption is about 2948kwh / t Zn. Under the same conditions, adding a combined additive consisting of 0.15g / L bone glue, 0.1g / L aloe gel, and 0.024 g / L cetylpyridinium chloride, the current efficiency is 91.83%, and the DC pow...
Embodiment 3
[0017] Current density 600A / m 2 , the electrolyte temperature is 35~40°C, the distance between the same poles is 70mm, the electrolysis cycle is 36h, the new electrolytic solution contains 150g / L zinc, and the pH value is 5~6; the electrolytic waste solution contains 50~55g / L zinc and sulfuric acid 155~165g / L . The cathode plate is a rolled pure aluminum plate, and the anode plate is a lead plate containing 1% silver. The electrolyte adopts the cycle system of top in and bottom out, that is, the waste liquid overflowing from the electrowinning cell is mixed with new liquid in a certain proportion and then reused. Generally, the mixing volume ratio of new liquid and waste liquid is 1:5~1:10. Adding 0.2 g / L bone glue, the current efficiency is 87.62%, and the DC power consumption is about 2984 kwh / t Zn. Under the same conditions, adding a combined additive consisting of 0.2g / L bone glue, 0.05g / L aloe gel, and 0.03 g / L cetylpyridinium chloride, the current efficiency is 90.77%,...
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