XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 3143
-10 -9 -8 -7 -6 -5 -4
-100
0
100
200
300
400
500
600
Galena
Pyrite
logI (A/cm2)
0 200 400 600 800 1000 1200
4
6
8
10
12
14
16
18
20
22
24
Time (s)
224
232
240
248
256
264
272
280
Pyrite:Galena=1:1
Figure 12. Tafel curves of galena and pyrite and galvanic current and potential between galena and pyrite couple at pH 9.18
Table 3. Fitting parameters of Tafel and galvanic corrosion plots
Mineral Ecorr, mV Icorr, µA·cm–2 Eg, mV Ig, µA·cm–2
Galena 98.79 1.25 254.84 4.72
Pyrite 287.32 7.62
0 200 400 600 800 1000 1200
0
2
4
6
8
10
12
Pyrite:Galena=1:1
Time (s)
NaHA
190
192
194
196
198
200
202
204
206
0 200 400 600 800 1000 1200
0
2
4
6
8
10
12
Ca2++NaHA Pyrite:Galena=1:1
Time (s)
184
186
188
190
192
Figure 13. Galvanic current and potential between galena and pyrite couple under depressant system
Table 4. Fitting parameters of Tafel and galvanic corrosion plots
Depressant Eg, mV Ig, µA·cm–2
NaHA 204.30 1.79
Ca2++NaHA 191.05 1.25
E
(vs.
SHE)/mV
i
(Acm-2)
E
(
i
(A·
-2
)
E
(mV)
i
(A·
-2
)
E
(mV)