XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 3129
while maintaining a higher recovery of the concentrate.
Additionally, to investigate the correlation between the
flotation behavior of chalcopyrite and the performance of
collectors, we conducted single mineral tests using BK386
and Z200, as depicted in Figure 3.The single mineral test
further demonstrates that BK386 exhibits superior chalco-
pyrite collection ability compared to Z200. Consequently,
the utilization of BK386 is anticipated to enhance copper
recovery.
Effects of pH Value on Roughing
The effect of pulp pH values on the recoveries of Cu and
Mo in the rougher concentrates was examined, and the
results are shown in Figure 4. In the tests, pulp pH values
were adjusted from 7.5 to 11.5 by adding lime at dosages
ranging from 0 to 3000 g/t. The other conditions included
a feed particle size distribution with 70% passing 74 μm,
NaSH dosage of 100 g/t, SIBX dosage of 7 g/t, BK386 dos-
age of 32 g/t, and BK233 dosage of 35 g/t.
As shown in Figure 4, the recoveries of Cu and Mo are
significantly affected by pulp pH values. As the pH value
increases, the recovery of Cu in the concentrate gradually
increases, while the recovery of Mo initially increases and
then decreases. When the pH value of roughing increases
from 10 to 11.5, the Cu recovery does not change much,
while the Mo recovery decreases from 74.88% to 70.69%,
possibly due to the negative influence of overdosing lime
on the floatability of molybdenite. Hence, the appropriate
dosage of lime is 2000 g/t, corresponding to a rougher pH
value of 10.
Effects of Collector BK386 Dosage on Roughing
With other flotation conditions fixed (feed particle size
distribution of 70% passing 74 μm, NaSH dosage of
100 g/t,SIBX dosage of 7 g/t, BK233 dosage of 35 g/t and
rougher pH value of 10), the influence of collector BK386
dosage on the recoveries and grades of Cu and Mo in the
rougher concentrates is depicted in Figure 5.
Figure 5 illustrates that as the dosage of BK386 increases,
the concentrate yield and the recoveries of Cu and Mo
exhibit an upward trend. While the recovery of Cu remains
relatively unchanged, the recovery of Mo demonstrates a
0.0 0.2 0.4 0.6 0.8
50
60
70
80
90
100
Dosage of collectors, mg/L
Z200
BK386
Dosage of terpene alcohol:5 mg/L
Figure 3. Effects of the dosage of BK386 and Z200 on the
flotation of chalcopyrite
7.0 7.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0
0
1
2
3
4
5
6
7
8
pH value
Cu grade
0
20
40
60
80
100
Cu recovery
(a)
7.0 7.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0
0.00
0.02
0.04
0.06
0.08
0.10
pH value
Mo grade
(b)
0
20
40
60
80
100
Mo recovery
Figure 4. Effects of pH value on recoveries and grades of Cu(a) and Mo(b) in rougher concentrates
Recovery,
%
Grade,% Recovery,% Grade,% Recovery,%
while maintaining a higher recovery of the concentrate.
Additionally, to investigate the correlation between the
flotation behavior of chalcopyrite and the performance of
collectors, we conducted single mineral tests using BK386
and Z200, as depicted in Figure 3.The single mineral test
further demonstrates that BK386 exhibits superior chalco-
pyrite collection ability compared to Z200. Consequently,
the utilization of BK386 is anticipated to enhance copper
recovery.
Effects of pH Value on Roughing
The effect of pulp pH values on the recoveries of Cu and
Mo in the rougher concentrates was examined, and the
results are shown in Figure 4. In the tests, pulp pH values
were adjusted from 7.5 to 11.5 by adding lime at dosages
ranging from 0 to 3000 g/t. The other conditions included
a feed particle size distribution with 70% passing 74 μm,
NaSH dosage of 100 g/t, SIBX dosage of 7 g/t, BK386 dos-
age of 32 g/t, and BK233 dosage of 35 g/t.
As shown in Figure 4, the recoveries of Cu and Mo are
significantly affected by pulp pH values. As the pH value
increases, the recovery of Cu in the concentrate gradually
increases, while the recovery of Mo initially increases and
then decreases. When the pH value of roughing increases
from 10 to 11.5, the Cu recovery does not change much,
while the Mo recovery decreases from 74.88% to 70.69%,
possibly due to the negative influence of overdosing lime
on the floatability of molybdenite. Hence, the appropriate
dosage of lime is 2000 g/t, corresponding to a rougher pH
value of 10.
Effects of Collector BK386 Dosage on Roughing
With other flotation conditions fixed (feed particle size
distribution of 70% passing 74 μm, NaSH dosage of
100 g/t,SIBX dosage of 7 g/t, BK233 dosage of 35 g/t and
rougher pH value of 10), the influence of collector BK386
dosage on the recoveries and grades of Cu and Mo in the
rougher concentrates is depicted in Figure 5.
Figure 5 illustrates that as the dosage of BK386 increases,
the concentrate yield and the recoveries of Cu and Mo
exhibit an upward trend. While the recovery of Cu remains
relatively unchanged, the recovery of Mo demonstrates a
0.0 0.2 0.4 0.6 0.8
50
60
70
80
90
100
Dosage of collectors, mg/L
Z200
BK386
Dosage of terpene alcohol:5 mg/L
Figure 3. Effects of the dosage of BK386 and Z200 on the
flotation of chalcopyrite
7.0 7.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0
0
1
2
3
4
5
6
7
8
pH value
Cu grade
0
20
40
60
80
100
Cu recovery
(a)
7.0 7.5 8.0 8.5 9.0 9.5 10.0 10.5 11.0 11.5 12.0
0.00
0.02
0.04
0.06
0.08
0.10
pH value
Mo grade
(b)
0
20
40
60
80
100
Mo recovery
Figure 4. Effects of pH value on recoveries and grades of Cu(a) and Mo(b) in rougher concentrates
Recovery,
%
Grade,% Recovery,% Grade,% Recovery,%