XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 3097
showing details on the four conditioning and flotation
stages lasting 18 minutes totally.
Characterization
Feed ore, concentrate and tailings have been assayed for Au,
Ag and S through fire assay by the SGS branch located at
DPM operation, Chelopech, Bulgaria.
Electrum occurrence was characterized in terms of
mineral chemistry, morphology, size and degree of libera-
tion. A SEM-based automated mineralogy system—Zeiss
sigma 300 FEG with two Brucker EDS spectrometers was
used to this end. Figure 2 illustrates typical electrum grains
identified.
All identified grains in the feed ore were electrum, with
no pure gold detected. Grain sizes varied from 2 to 20 μm,
Figure 3. SEM-EDS images of electrum grains (composition and morphology) in the feed
Table 2. Flotation reagents (promoters) tested
Trade Name Supplier Chemistry (According to Data Sheet)
Danafloat-468 FMC Denmark Dialkyl dithiophosphate
Danafloat-571 FMC Denmark Dialkyl dithiophosphate and mercaptobenzothiazole
DP-OMC-1127 BASF Anionic polyamine
Tecflote S11 Nouryon Nitrile base collector
Armoflote S100 Nouryon Amine Dithiocarbamate Sodium Salt
Hostaflot-10093 Clariant Sodium dithiophosphate acid and phosphoric acid ester
Hostaflot-LIB Clariant Dithiophosphate acid and sodium salt
Hostaflot-7650 Clariant Mixtures of thio-compounds
showing details on the four conditioning and flotation
stages lasting 18 minutes totally.
Characterization
Feed ore, concentrate and tailings have been assayed for Au,
Ag and S through fire assay by the SGS branch located at
DPM operation, Chelopech, Bulgaria.
Electrum occurrence was characterized in terms of
mineral chemistry, morphology, size and degree of libera-
tion. A SEM-based automated mineralogy system—Zeiss
sigma 300 FEG with two Brucker EDS spectrometers was
used to this end. Figure 2 illustrates typical electrum grains
identified.
All identified grains in the feed ore were electrum, with
no pure gold detected. Grain sizes varied from 2 to 20 μm,
Figure 3. SEM-EDS images of electrum grains (composition and morphology) in the feed
Table 2. Flotation reagents (promoters) tested
Trade Name Supplier Chemistry (According to Data Sheet)
Danafloat-468 FMC Denmark Dialkyl dithiophosphate
Danafloat-571 FMC Denmark Dialkyl dithiophosphate and mercaptobenzothiazole
DP-OMC-1127 BASF Anionic polyamine
Tecflote S11 Nouryon Nitrile base collector
Armoflote S100 Nouryon Amine Dithiocarbamate Sodium Salt
Hostaflot-10093 Clariant Sodium dithiophosphate acid and phosphoric acid ester
Hostaflot-LIB Clariant Dithiophosphate acid and sodium salt
Hostaflot-7650 Clariant Mixtures of thio-compounds