2128 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
due to the presence of pyrite. The Fenton reaction is a
very well know methodology which is commonly imple-
ment for the destruction of hazardous organic compounds
in treatment of wastewater. This methodology lies in the
combination of Fe2+ with H2O2 generating free radicals
as •OH and HO2•. These free radicals when reacting with
the organic compound could generated degraded products
(Ameta et al., 2018). Here we use the same principle, but
this time using the Fe2+ available from the pyrite and the
H2O2 generated from the ultrasonic treatment. We look
Depressor: NaOH (0.1 M) pH: 11.5
Collector: (PAX-DTP) 2x10-5 mol/L
Air flow: 80 ml/min
Flotation time: 3min
Depression of activated pyrite
Pre-treatment ultrasonic/H2O2/regrinding
Collector variable (PAX-DTP) 1x10-3 mol/L
N2 flow 33ml/min
Flotation time: 3min
Pyrite flotation
Pyrite: (95.4%) -75+150μm
CONCENTRATES
Ultrasonic: 20min
H2O2: concentration 0.1M
Regrinding: P80=30 μm
TAILINGS
Figure 1. Flowsheet of microflotation test for the depression of activated pyrite using ultrasonic/ H
2 O
2 /
regrinding treatments
Figure 2. Relationship between ultrasonic treatment time of pulp and oxygen content for a) pyrite treated with PAX and b)
pyrite treated with DTP
due to the presence of pyrite. The Fenton reaction is a
very well know methodology which is commonly imple-
ment for the destruction of hazardous organic compounds
in treatment of wastewater. This methodology lies in the
combination of Fe2+ with H2O2 generating free radicals
as •OH and HO2•. These free radicals when reacting with
the organic compound could generated degraded products
(Ameta et al., 2018). Here we use the same principle, but
this time using the Fe2+ available from the pyrite and the
H2O2 generated from the ultrasonic treatment. We look
Depressor: NaOH (0.1 M) pH: 11.5
Collector: (PAX-DTP) 2x10-5 mol/L
Air flow: 80 ml/min
Flotation time: 3min
Depression of activated pyrite
Pre-treatment ultrasonic/H2O2/regrinding
Collector variable (PAX-DTP) 1x10-3 mol/L
N2 flow 33ml/min
Flotation time: 3min
Pyrite flotation
Pyrite: (95.4%) -75+150μm
CONCENTRATES
Ultrasonic: 20min
H2O2: concentration 0.1M
Regrinding: P80=30 μm
TAILINGS
Figure 1. Flowsheet of microflotation test for the depression of activated pyrite using ultrasonic/ H
2 O
2 /
regrinding treatments
Figure 2. Relationship between ultrasonic treatment time of pulp and oxygen content for a) pyrite treated with PAX and b)
pyrite treated with DTP