XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 267
electrode-grizzly bars. Nevertheless, the electrodes main-
tained their selectivity, demonstrating their ability to selec-
tively target high-grade particles. The results of the
selectivity tests are summarized in Table 1.
Energy
Tests were conducted to determine the energy input ranges
necessary for the operation of the electrode-grizzly unit.
These ranges were established by simulating the dynamic
operation of the system, mirroring the actual process where
high-grade particles are selectively targeted and then pass
through the electrode-grizzly if their degree of size reduc-
tion is significant enough.
Particles with known ore grades were placed on the griz-
zly and subjected to a single discharge. Subsequently, the
Table 1. Selectivity of breakage for mineralized and barren
particle pairs subjected to one discharge for different samples
used
Mineralized
Selectivity, %
Barren
Selectivity, %
Both
Targeted, %
Synthetic
particles test
91.4 4.3 4.3
Cu/Au ore &
basalt test
81.7 13.3 5.0
particles were inspected, and if any had passed through the
existing gap between the electrode bars, they were replaced
with new particles. Each particle was then advanced one
position along the electrodes, with those at the end being
moved back to the start. The number of discharges, and
thus the energy input required to cause each particle to pass
through the electrode-grizzly bars, was recorded. Various ore
grade combinations were tested during these experiments.
The results of these tests suggested that for this particu-
lar ore, an energy input of approximately 1.9 ± 0.7 kWh/t
could be expected. This finding provides valuable insight
into the energy requirements for operating the electrode-
grizzly system effectively.
Pre-Concentration
In the final stage of the batch study, an unsorted gold-cop-
per ore was processed using the electrode-grizzly in a sim-
ulated dynamic operation, following the same procedure
employed to measure energy input. Although an energy
input of 1.9 kWh/t was initially targeted, the energy range
was expanded to assess the performance of the electrodes
across a broader spectrum of copper and mass recoveries
and to accommodate experimental variability.
To achieve this, the grizzly electrode undersize for
various energy inputs was collected and assayed separately.
Figure 9 illustrates the pre-concentration curves, plotted as
Figure 9. Average grizzly electrode pre-concentration performance compared to the perfect separation heterogeneity curve.
Shading represents one standard deviation based on four repeat tests (Lay et al. 2023)
electrode-grizzly bars. Nevertheless, the electrodes main-
tained their selectivity, demonstrating their ability to selec-
tively target high-grade particles. The results of the
selectivity tests are summarized in Table 1.
Energy
Tests were conducted to determine the energy input ranges
necessary for the operation of the electrode-grizzly unit.
These ranges were established by simulating the dynamic
operation of the system, mirroring the actual process where
high-grade particles are selectively targeted and then pass
through the electrode-grizzly if their degree of size reduc-
tion is significant enough.
Particles with known ore grades were placed on the griz-
zly and subjected to a single discharge. Subsequently, the
Table 1. Selectivity of breakage for mineralized and barren
particle pairs subjected to one discharge for different samples
used
Mineralized
Selectivity, %
Barren
Selectivity, %
Both
Targeted, %
Synthetic
particles test
91.4 4.3 4.3
Cu/Au ore &
basalt test
81.7 13.3 5.0
particles were inspected, and if any had passed through the
existing gap between the electrode bars, they were replaced
with new particles. Each particle was then advanced one
position along the electrodes, with those at the end being
moved back to the start. The number of discharges, and
thus the energy input required to cause each particle to pass
through the electrode-grizzly bars, was recorded. Various ore
grade combinations were tested during these experiments.
The results of these tests suggested that for this particu-
lar ore, an energy input of approximately 1.9 ± 0.7 kWh/t
could be expected. This finding provides valuable insight
into the energy requirements for operating the electrode-
grizzly system effectively.
Pre-Concentration
In the final stage of the batch study, an unsorted gold-cop-
per ore was processed using the electrode-grizzly in a sim-
ulated dynamic operation, following the same procedure
employed to measure energy input. Although an energy
input of 1.9 kWh/t was initially targeted, the energy range
was expanded to assess the performance of the electrodes
across a broader spectrum of copper and mass recoveries
and to accommodate experimental variability.
To achieve this, the grizzly electrode undersize for
various energy inputs was collected and assayed separately.
Figure 9 illustrates the pre-concentration curves, plotted as
Figure 9. Average grizzly electrode pre-concentration performance compared to the perfect separation heterogeneity curve.
Shading represents one standard deviation based on four repeat tests (Lay et al. 2023)