106
J. A. de Lima et al.
Table 3 Results obtained in
pilot cell tests
Prueba
[Zn 2+ ]
[H + ]
E.C
g/L
g/L
%
1
30
185
84.19
2
30
185
84.04
3
35
185
86.83
4
40
185
88.83
5
40
185
88.64
6
45
185
90.36
7
50
183
91.18
8
50
183
91.20
9
55
184
92.25
10
60
182
92.61
11
60
183
92.76
12
65
185
93.78
13
70
180
93.83
14
70
182
93.89
15
75
182
94.08
Data Source Internal Data
Fig. 1 Current efficiency
versus zinc concentration in
electrolyte
82
84
86
88
90
92
94
96
25
35
45
55
65
75
85
CE (%)
Concentration of Zn 2+ g/L
control, being able to work up to a maximum of 200 g/L of [H
+ ] in the three CJM 1,
CJM 2, and CJM 3 electrolysis cell rooms.
Manganese Reduction in Electrolyte
As mentioned in Sect. 2, the impact of manganese depends on its concentration.
In the Cajamarquilla Refinery, given the configuration of the process (Fig. 2), the
main outputs of manganese are in the electrolysis process, first through cleaning of
anodes and secondly by cell cleaning, laboratory tests determined that 75% of the