XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 2753
of increased collector dosage on mineral flotation behavior
was similar to Figure 3 (a). The difference was that the col-
lector dosage was reduced by 50 mg/L, and more than six
percentage points of the chlorite recovery was increased.
Through the optimization of experimental conditions, the
flotation difference between the two minerals can reach
94.68% after introducing micro-nano bubbles. After intro-
ducing micro-nano bubbles, the pH of the slurry had same
effects on the flotation behavior of chlorite and hematite.
Under low pH conditions, the potential of micro-nano-
bubbles and chlorite was same, resulting in the inability to
produce effective adsorption due to electrostatic repulsion
(Silvester et al., 2011 Zhang et al., 2020). On the contrary,
hematite can be adsorbed through electrostatic attraction
and micro-nano bubbles (Quast, 2016). With the increases
of pH, the hydrophobic force was dominant between
bubbles and minerals, which manifest itself as the floating
of chlorite.
Under the conditions of pH is 11, α-BLA dosage is
200 mg/L, the starch dosage is 20 mg/L, and Ca2+ con-
centration is 100 mg/L, the effect of introducing micro-
nano bubbles on the flotation separation of hematite and
chlorite was investigated. As can be seen from Figure 5,
micro-nano bubbles could significantly improve the sepa-
ration efficiency of hematite and chlorite. This result again
confirms that micro-nano bubbles enhance the flotation
separation effect.
50 100 150 200 250
0
20
40
60
80
100
Chlorite
Hematite
(a)
10 20 30 40
0
20
40
60
80
100
Starch dosage (mg/L)
Chlorite
Hematite
(b)
50 100 150 200
0
20
40
60
80
100
Ca2+ concentration (mg/L)
Chlorite
Hematite
(c)
3 5 7 9 11
0
20
40
60
80
100
pH
Chlorite
Hematite
(d)
Figure 4. Effects of different experiment conditions on hematite and chlorite flotation (with micro-nano
bubbles)
A B C D E
0
20
40
60
80
100
Inspection indicators
Without micro-nanobubbles
With micro-nanobubbles
Variation after introducing micro-nanobubbles
Figure 5. Flotation separation results of hematite and
chlorite with or without micro-nano bubbles (A-TFe
grade, B-TFe recovery, C-SiO
2 grade, D- SiO
2 recovery, E-
separation efficiency)
Recovery
(%)
Recovery
(%)
Recovery
(%)
Recovery
(%)
Index
(%)
of increased collector dosage on mineral flotation behavior
was similar to Figure 3 (a). The difference was that the col-
lector dosage was reduced by 50 mg/L, and more than six
percentage points of the chlorite recovery was increased.
Through the optimization of experimental conditions, the
flotation difference between the two minerals can reach
94.68% after introducing micro-nano bubbles. After intro-
ducing micro-nano bubbles, the pH of the slurry had same
effects on the flotation behavior of chlorite and hematite.
Under low pH conditions, the potential of micro-nano-
bubbles and chlorite was same, resulting in the inability to
produce effective adsorption due to electrostatic repulsion
(Silvester et al., 2011 Zhang et al., 2020). On the contrary,
hematite can be adsorbed through electrostatic attraction
and micro-nano bubbles (Quast, 2016). With the increases
of pH, the hydrophobic force was dominant between
bubbles and minerals, which manifest itself as the floating
of chlorite.
Under the conditions of pH is 11, α-BLA dosage is
200 mg/L, the starch dosage is 20 mg/L, and Ca2+ con-
centration is 100 mg/L, the effect of introducing micro-
nano bubbles on the flotation separation of hematite and
chlorite was investigated. As can be seen from Figure 5,
micro-nano bubbles could significantly improve the sepa-
ration efficiency of hematite and chlorite. This result again
confirms that micro-nano bubbles enhance the flotation
separation effect.
50 100 150 200 250
0
20
40
60
80
100
Chlorite
Hematite
(a)
10 20 30 40
0
20
40
60
80
100
Starch dosage (mg/L)
Chlorite
Hematite
(b)
50 100 150 200
0
20
40
60
80
100
Ca2+ concentration (mg/L)
Chlorite
Hematite
(c)
3 5 7 9 11
0
20
40
60
80
100
pH
Chlorite
Hematite
(d)
Figure 4. Effects of different experiment conditions on hematite and chlorite flotation (with micro-nano
bubbles)
A B C D E
0
20
40
60
80
100
Inspection indicators
Without micro-nanobubbles
With micro-nanobubbles
Variation after introducing micro-nanobubbles
Figure 5. Flotation separation results of hematite and
chlorite with or without micro-nano bubbles (A-TFe
grade, B-TFe recovery, C-SiO
2 grade, D- SiO
2 recovery, E-
separation efficiency)
Recovery
(%)
Recovery
(%)
Recovery
(%)
Recovery
(%)
Index
(%)