2196 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
Zeta potential measurements of suspensions of mineral
samples in the presence of activator CuSO4 prepared by the
MgCl2 solution with different molar concentrations are dis-
played in Figure 12. The zeta potential of pentlandite sus-
pension increases with the increase of MgCl2 concentration
from 0.001 to 1 mol/L among all concentrations tested,
while the zeta potential of lizardite suspension increases
with the increase of MgCl2 concentration from 0.001 to
0.01 mol/L and then decreases with further increasing the
molar concentration of MgCl2 to 1 mol/L among all con-
centrations tested. The MgCl2 molar concentration of 0.1
mol/L is a turning point for the zeta potential measure-
ment, which agrees with the microflotation performance of
pentlandite and lizardite in the presence of MgCl2 solutions
with different molar concentrations. This also matches the
zeta potential analysis in the work conducted by Alvarez-
Silva et al. (Alvarez-Silva et al., 2016).
Zeta potential measurements of suspensions of pent-
landite and lizardite samples in the presence of activator
CuSO4 prepared by the FeCl2 solution with different molar
concentrations are displayed in Figure 13, both zeta poten-
tial measurements have a same trend, and the zeta potential
values are statistically the same. The zeta potential values
obtained in the presence of FeCl2 solutions with molar con-
centrations of 0.001 and 0.01 mol/L are higher than that in
the presence of FeCl2 solutions with molar concentrations
of 0.1 and 1 mol/L.
Zeta potential measurements of suspensions of mineral
samples in the presence of activator CuSO4 prepared by the
FeCl2 solutions with different molar concentrations are dis-
played in Figure 14. The zeta potential of pentlandite sus-
pension in the presence of NiCl2 solutions increases with
the increase of NiCl2 concentrations from 0 to 0.01 mol/L,
then decreases with further increasing the NiCl2 concen-
tration to 1 mol/L among all concentrations tested, while
the zeta potential of lizardite suspension in the presence of
NiCl2 solutions does not show any trends.
Blank Mg0.001 Mg0.01 Mg0.1 Mg1
30
20
10
0
10
20
30
40
Concentration (mol/L)
Pentlandite
Lizardite
Figure 12. Zeta potential of suspensions of mineral samples
in the presence of MgCl
2 solution with different molar
concentrations. The error bar stands for a standard error of
the mean of four independent runs
Blank Fe(2+)0.001 Fe(2+)0.01 Fe(2+)0.1 Fe(2+)1
30
20
10
0
10
20
30
Concentration (mol/L)
Pentlandite
Lizardite
Figure 13. Zeta potential for suspensions of mineral samples
in the presence of FeCl2 solution with different molar
concentrations. The error bar stands for a standard error of
the mean of four independent runs
Blank Ni0.001 Ni0.01 Ni0.1 Ni 1
30
20
10
0
10
20
30
40
Concentration (mol/L)
Pentlandite
Lizardite
Figure 14. Zeta potential for suspensions of mineral samples
in the presence of NiCl
2 solution with different molar
concentrations. The error bar stands for a standard error of
the mean of four independent runs
Zeta
potential(
Zeta
potential
(mV)
Zeta
pot
tial
(mV)
Zeta potential measurements of suspensions of mineral
samples in the presence of activator CuSO4 prepared by the
MgCl2 solution with different molar concentrations are dis-
played in Figure 12. The zeta potential of pentlandite sus-
pension increases with the increase of MgCl2 concentration
from 0.001 to 1 mol/L among all concentrations tested,
while the zeta potential of lizardite suspension increases
with the increase of MgCl2 concentration from 0.001 to
0.01 mol/L and then decreases with further increasing the
molar concentration of MgCl2 to 1 mol/L among all con-
centrations tested. The MgCl2 molar concentration of 0.1
mol/L is a turning point for the zeta potential measure-
ment, which agrees with the microflotation performance of
pentlandite and lizardite in the presence of MgCl2 solutions
with different molar concentrations. This also matches the
zeta potential analysis in the work conducted by Alvarez-
Silva et al. (Alvarez-Silva et al., 2016).
Zeta potential measurements of suspensions of pent-
landite and lizardite samples in the presence of activator
CuSO4 prepared by the FeCl2 solution with different molar
concentrations are displayed in Figure 13, both zeta poten-
tial measurements have a same trend, and the zeta potential
values are statistically the same. The zeta potential values
obtained in the presence of FeCl2 solutions with molar con-
centrations of 0.001 and 0.01 mol/L are higher than that in
the presence of FeCl2 solutions with molar concentrations
of 0.1 and 1 mol/L.
Zeta potential measurements of suspensions of mineral
samples in the presence of activator CuSO4 prepared by the
FeCl2 solutions with different molar concentrations are dis-
played in Figure 14. The zeta potential of pentlandite sus-
pension in the presence of NiCl2 solutions increases with
the increase of NiCl2 concentrations from 0 to 0.01 mol/L,
then decreases with further increasing the NiCl2 concen-
tration to 1 mol/L among all concentrations tested, while
the zeta potential of lizardite suspension in the presence of
NiCl2 solutions does not show any trends.
Blank Mg0.001 Mg0.01 Mg0.1 Mg1
30
20
10
0
10
20
30
40
Concentration (mol/L)
Pentlandite
Lizardite
Figure 12. Zeta potential of suspensions of mineral samples
in the presence of MgCl
2 solution with different molar
concentrations. The error bar stands for a standard error of
the mean of four independent runs
Blank Fe(2+)0.001 Fe(2+)0.01 Fe(2+)0.1 Fe(2+)1
30
20
10
0
10
20
30
Concentration (mol/L)
Pentlandite
Lizardite
Figure 13. Zeta potential for suspensions of mineral samples
in the presence of FeCl2 solution with different molar
concentrations. The error bar stands for a standard error of
the mean of four independent runs
Blank Ni0.001 Ni0.01 Ni0.1 Ni 1
30
20
10
0
10
20
30
40
Concentration (mol/L)
Pentlandite
Lizardite
Figure 14. Zeta potential for suspensions of mineral samples
in the presence of NiCl
2 solution with different molar
concentrations. The error bar stands for a standard error of
the mean of four independent runs
Zeta
potential(
Zeta
potential
(mV)
Zeta
pot
tial
(mV)