3100 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
fraction of the xanthate dosage with promoter. Hostaflot-
LIB tests resulted in a maximum recovery of 84.9% at
100–380 [Promoter-PAX] g/t. The performance pattern
here is similar to the one of Hostaflot-7650, although with
slightly lower overall recovery. The main observation from
the Hostaflot series is a linear behavior -promoter dose-
Au recovery increase. Most likely an inflexion point is not
yet reached, similar to the DP-OMC-1127 case, so better
results at higher dosage could be achieved.
In order to better trace possible synergistic effect from
the use of secondary collector, a correlative matrix has been
constructed (Figure 8) to link Au, Ag and S recovery and
mass pull as derived from the tests performed.
A correlation between mass pull and Au recovery could
be established from the Hostaflot series results in contrast
to those coming from the DP-OMC-1127 use. This means
that for the Hostaflot reagents,the concentrate mass increase
is leading to higher Au recovery. The overall mass pull is
always higher for Hostaflot series tests (9.7–10.8%), than
the one for the DP-OMC-1127 (8.1% ).This observation
corroborates with the frothing features reported for the
Hostaflot promoters, allowing the froth to stabilize and
maintain higher mass pull in the concentrate fraction. This
also means, that part of the concentrate material could
have been recovered through entrainment rather than true
flotation at higher dosages. The DP-OMC demonstrated
slightly lower Au recovery, the improvement being entirely
due to its increased dosage.
The above findings allowed for Hostaflot-7650 and
Hostaflot-LIB to be ultimately recommended rather than
Hostaflot-10093 and DP-OMC.
Au/Ag Ratio in Electrum and Effect on Flotation
One of the main objectives of the study was to investigate
whether electrum grains richer in silver have a more pro-
nounced tendency to report to the tailings. To this end,
Figure 10 offers a comparative view of Au/Ag ratio as mea-
sured in the feed, concentrate and tailing products from
selected tests.
Figure 7. Gold recovery at varied collector and promoter dose levels for the four best performing reagents
fraction of the xanthate dosage with promoter. Hostaflot-
LIB tests resulted in a maximum recovery of 84.9% at
100–380 [Promoter-PAX] g/t. The performance pattern
here is similar to the one of Hostaflot-7650, although with
slightly lower overall recovery. The main observation from
the Hostaflot series is a linear behavior -promoter dose-
Au recovery increase. Most likely an inflexion point is not
yet reached, similar to the DP-OMC-1127 case, so better
results at higher dosage could be achieved.
In order to better trace possible synergistic effect from
the use of secondary collector, a correlative matrix has been
constructed (Figure 8) to link Au, Ag and S recovery and
mass pull as derived from the tests performed.
A correlation between mass pull and Au recovery could
be established from the Hostaflot series results in contrast
to those coming from the DP-OMC-1127 use. This means
that for the Hostaflot reagents,the concentrate mass increase
is leading to higher Au recovery. The overall mass pull is
always higher for Hostaflot series tests (9.7–10.8%), than
the one for the DP-OMC-1127 (8.1% ).This observation
corroborates with the frothing features reported for the
Hostaflot promoters, allowing the froth to stabilize and
maintain higher mass pull in the concentrate fraction. This
also means, that part of the concentrate material could
have been recovered through entrainment rather than true
flotation at higher dosages. The DP-OMC demonstrated
slightly lower Au recovery, the improvement being entirely
due to its increased dosage.
The above findings allowed for Hostaflot-7650 and
Hostaflot-LIB to be ultimately recommended rather than
Hostaflot-10093 and DP-OMC.
Au/Ag Ratio in Electrum and Effect on Flotation
One of the main objectives of the study was to investigate
whether electrum grains richer in silver have a more pro-
nounced tendency to report to the tailings. To this end,
Figure 10 offers a comparative view of Au/Ag ratio as mea-
sured in the feed, concentrate and tailing products from
selected tests.
Figure 7. Gold recovery at varied collector and promoter dose levels for the four best performing reagents