Start-up and Improvements of the New Electrolysis Plant …
223
Fig. 2 Flow chart of zinc electrolytic process
Table 2 Zinc electrolytic operation condition in the No. 2 and the new No. 3 electrowinning plant
Items
The No. 2
electrowinning
plant
The new No. 3
electrowinning
plant
Unit
Electrolyte
Zn
50 + 5
g/L
Free H 2 SO 4
160 + 20
g/L
Temperature
35–42
°C
Circulation
40–45
180–200
L/(min · cell)
Electrode plate
Electrode
distance
65
mm
Cathode number
36
108
sheets/cell
Anode number
37
109
sheets/cell
Cathode size
660 W × 1100
H × 6 t
710 W × 1325
H × 6.3 t
mm
Anode size
645 W × 1075
H × 9 t
685 W × 1305
H × 9 t
mm
Energization
time
Holidays,
weekdays
24, 48
hours