XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 921
k g g
g
Gangue SO4
ref
ref
ref
Ca
Depressant
ref
ref
0
4
4 =+
+gMg
+g
+
e
f
f
e
o
p
o
p
6Ca
6Mg
6Ca@ref
6Mg@
6Depressant
6SO
6SO
6Depressant@
@-6Ca@ref
@-6Mg@
@-6SO4@
@ref
@-6Depressant@
The coefficients of these linear relationships have been
obtained by considering the flotation tests performed with
SW, DLW and PW (Le, Schreithofer and Dahl 2020, Le
2021). They are negative for sulfates, calcium and magne-
sium on copper bearing mineral flotation kinetic, and posi-
tive for residual collector concentration. Similarly, gangue
flotation is prevented by dissolved compounds, as well as
residual depressant.
Recirculation Loop With Recycled Water Treatment
The potential benefic impact of the recycled water treat-
ment is then investigated. The simulation flowsheet is
presented in Figure 6. First, simple performance models
are used for this treatment to establish mass balance with
given performances. This step enables from one hand to
investigate the impact of water treatment on global plant
performance, and from another hand to establish the mass
balance which will serve as basis for operation design.
To do so, the performance models of the water treat-
ment unit operations are then replaced by sizing models
allowing to calculate the size of the equipment match-
ing the targeted performances. Considered operations are
Dissolved Air Flotation (DAF) and Ion Exchange Resins
(IER), for fines and sulfate removal respectively. Pilot test
results (Saari 2020) are used to set DAF performance. IER is
modeled as an adsorption column and breakthrough curves
obtained in lab (Ekmekçi 2020) are used to calibrate the
model for sulfates. Sizing is made considering the following
column dimensions: 2 m height and 3 m diameter, contain-
ing 11 660 kg of resins. Calcium was not studied during
the ITERAMS project, and no data is available regarding
its removal. A pure performance model is kept, without siz-
ing of the unit. The treatment requirements are provided as
information, IER could be considered as for sulfates. The
proportion of treated flow depends on the targeted output
concentrations and does not necessarily correspond to the
whole recirculation stream. The water treatment section
flowsheet, that replaces the water treatment performance
model of Figure 6, is presented on Figure 7.
Figure 6. Flowsheet for simulations with water treatment
k g g
g
Gangue SO4
ref
ref
ref
Ca
Depressant
ref
ref
0
4
4 =+
+gMg
+g
+
e
f
f
e
o
p
o
p
6Ca
6Mg
6Ca@ref
6Mg@
6Depressant
6SO
6SO
6Depressant@
@-6Ca@ref
@-6Mg@
@-6SO4@
@ref
@-6Depressant@
The coefficients of these linear relationships have been
obtained by considering the flotation tests performed with
SW, DLW and PW (Le, Schreithofer and Dahl 2020, Le
2021). They are negative for sulfates, calcium and magne-
sium on copper bearing mineral flotation kinetic, and posi-
tive for residual collector concentration. Similarly, gangue
flotation is prevented by dissolved compounds, as well as
residual depressant.
Recirculation Loop With Recycled Water Treatment
The potential benefic impact of the recycled water treat-
ment is then investigated. The simulation flowsheet is
presented in Figure 6. First, simple performance models
are used for this treatment to establish mass balance with
given performances. This step enables from one hand to
investigate the impact of water treatment on global plant
performance, and from another hand to establish the mass
balance which will serve as basis for operation design.
To do so, the performance models of the water treat-
ment unit operations are then replaced by sizing models
allowing to calculate the size of the equipment match-
ing the targeted performances. Considered operations are
Dissolved Air Flotation (DAF) and Ion Exchange Resins
(IER), for fines and sulfate removal respectively. Pilot test
results (Saari 2020) are used to set DAF performance. IER is
modeled as an adsorption column and breakthrough curves
obtained in lab (Ekmekçi 2020) are used to calibrate the
model for sulfates. Sizing is made considering the following
column dimensions: 2 m height and 3 m diameter, contain-
ing 11 660 kg of resins. Calcium was not studied during
the ITERAMS project, and no data is available regarding
its removal. A pure performance model is kept, without siz-
ing of the unit. The treatment requirements are provided as
information, IER could be considered as for sulfates. The
proportion of treated flow depends on the targeted output
concentrations and does not necessarily correspond to the
whole recirculation stream. The water treatment section
flowsheet, that replaces the water treatment performance
model of Figure 6, is presented on Figure 7.
Figure 6. Flowsheet for simulations with water treatment