XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 3071
conducted with less data due to the shorter processing
period with the ore. A total of 458 data points were evalu-
ated through the plant’s online analyzer. During the tested
period with Aerophine, an average dosage of 56.8 g/t of
Aerophine, 23.4 g/t of PAX, and 0.9 g/t of Dowfroth 250
was administered. Conversely, during the observed periods
with PAX, a dosage of 73.5 g/t of PAX, 27 g/t of Hostaflot
7869, and 0.8 g/t of Dowfroth 250 was administered. The
results showed the same average gold grade in the plant feed
as the previous campaign, but lower gold recovery for both
collectors. There was no significant difference observed
between the collectors for the recovery results of Au and Te
with 95% statistical confidence. However, a reduction in
mass pull with Aerophine of 28% was observed. The results
are shown in the Figure 17.
Chemical laboratory results:
The results from the daily composites do not suggest differ-
ences in gold and silver recoveries between the collectors.
However, there is higher tellurium recovery and a reduction
in mass pull as a function of gold grade in the plant feed, as
illustrated in Figure 18.
Mineralogy
The mineralogical composition of the Au-Tellurides ore
is presented in Table 3, revealing a significant presence of
silicate minerals such as quartz, muscovite, and andalusite.
The total sulphide content is approximately 1%, with pyrite
being the most prevalent sulphide mineral.
The major gold-bearing minerals identified in the
Åkulla Kankberg ore from plant flotation samples, based
Figure 13. Gold feed grade analyzed by the plant’s XRF by
collector type after adjusting for equivalent feed grades
Figure 14. Gold recovery by collector type after adjusting
for equivalent feed grades
Figure 15. Gold feed grade through the plant’s daily
composition samples analyzed by the chemical laboratory by
collector type after adjusting for equivalent feed grades
Figure 16. Gold recovery through the plant’s daily
composition samples analyzed by the chemical laboratory by
collector type after adjusting for equivalent feed grades
conducted with less data due to the shorter processing
period with the ore. A total of 458 data points were evalu-
ated through the plant’s online analyzer. During the tested
period with Aerophine, an average dosage of 56.8 g/t of
Aerophine, 23.4 g/t of PAX, and 0.9 g/t of Dowfroth 250
was administered. Conversely, during the observed periods
with PAX, a dosage of 73.5 g/t of PAX, 27 g/t of Hostaflot
7869, and 0.8 g/t of Dowfroth 250 was administered. The
results showed the same average gold grade in the plant feed
as the previous campaign, but lower gold recovery for both
collectors. There was no significant difference observed
between the collectors for the recovery results of Au and Te
with 95% statistical confidence. However, a reduction in
mass pull with Aerophine of 28% was observed. The results
are shown in the Figure 17.
Chemical laboratory results:
The results from the daily composites do not suggest differ-
ences in gold and silver recoveries between the collectors.
However, there is higher tellurium recovery and a reduction
in mass pull as a function of gold grade in the plant feed, as
illustrated in Figure 18.
Mineralogy
The mineralogical composition of the Au-Tellurides ore
is presented in Table 3, revealing a significant presence of
silicate minerals such as quartz, muscovite, and andalusite.
The total sulphide content is approximately 1%, with pyrite
being the most prevalent sulphide mineral.
The major gold-bearing minerals identified in the
Åkulla Kankberg ore from plant flotation samples, based
Figure 13. Gold feed grade analyzed by the plant’s XRF by
collector type after adjusting for equivalent feed grades
Figure 14. Gold recovery by collector type after adjusting
for equivalent feed grades
Figure 15. Gold feed grade through the plant’s daily
composition samples analyzed by the chemical laboratory by
collector type after adjusting for equivalent feed grades
Figure 16. Gold recovery through the plant’s daily
composition samples analyzed by the chemical laboratory by
collector type after adjusting for equivalent feed grades