268 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
cumulative copper recovery versus cumulative mass recov-
ery to the grizzly undersize product. The leftmost point on
the curve corresponds to an energy input of 0.9 kWh/t,
while the rightmost point corresponds to 1.5 kWh/t.
The analysis revealed an energy input of 1.4 kWh/t was
required to achieve a 90% copper recovery from the feed
while rejecting 30.7% of the mass. Additionally, Figure 9
includes the theoretical heterogeneity curve of the ore,
which was calculated by assaying 100 randomly selected
particles. This theoretical curve represents the maximum
achievable pre-concentration for the sample and is depen-
dent on the dissemination of minerals throughout the rock
matrix.
Small-Scale Continuous System
After achieving promising results in the batch assessment
of the electrode-grizzly unit, a laboratory-scale continuous
system was developed and manufactured at the JKMRC to
thoroughly evaluate the patent (Continuous HVP Grizzly
System). This system comprises a feeder and a processing
vessel that accommodates the electrode-grizzly bars which
are positioned at an angle to facilitate particle flow. The
processing vessel was specifically designed to test various
configurations of the electrode-grizzly system and to segre-
gate the feed material into undersize and oversize products
as they pass over the HVP processing zone. A side view of
the system and an example of the resulting product split is
presented in Figure 10.
The system was engineered to accommodate up to
seven parallel electrode bars and is capable of achieving a
throughput of one ton per hour (tph). Each positive and
negative electrode was connected to its respective terminal
on the HUST generator based on its polarity. Particle flow
within the system is facilitated by a combination of fac-
tors, including the inclination of the bars, the disturbance
caused by electrical discharges, and the pressure exerted by
incoming fresh feed entering the processing zone, albeit to
a lesser extent.
Figure 11 is a frame from a high-speed camera record-
ing of a five-bar electrode-grizzly system showing mul-
tiple arcs being formed from a single discharge from the
Figure 10. Continuous laboratory-scale HVP Grizzly system installed at the JKMRC’s HVP Flexible Testing Facility
Figure 11. Frame of a video of the operation of the electrode-
grizzly system operating with five electrode bars
cumulative copper recovery versus cumulative mass recov-
ery to the grizzly undersize product. The leftmost point on
the curve corresponds to an energy input of 0.9 kWh/t,
while the rightmost point corresponds to 1.5 kWh/t.
The analysis revealed an energy input of 1.4 kWh/t was
required to achieve a 90% copper recovery from the feed
while rejecting 30.7% of the mass. Additionally, Figure 9
includes the theoretical heterogeneity curve of the ore,
which was calculated by assaying 100 randomly selected
particles. This theoretical curve represents the maximum
achievable pre-concentration for the sample and is depen-
dent on the dissemination of minerals throughout the rock
matrix.
Small-Scale Continuous System
After achieving promising results in the batch assessment
of the electrode-grizzly unit, a laboratory-scale continuous
system was developed and manufactured at the JKMRC to
thoroughly evaluate the patent (Continuous HVP Grizzly
System). This system comprises a feeder and a processing
vessel that accommodates the electrode-grizzly bars which
are positioned at an angle to facilitate particle flow. The
processing vessel was specifically designed to test various
configurations of the electrode-grizzly system and to segre-
gate the feed material into undersize and oversize products
as they pass over the HVP processing zone. A side view of
the system and an example of the resulting product split is
presented in Figure 10.
The system was engineered to accommodate up to
seven parallel electrode bars and is capable of achieving a
throughput of one ton per hour (tph). Each positive and
negative electrode was connected to its respective terminal
on the HUST generator based on its polarity. Particle flow
within the system is facilitated by a combination of fac-
tors, including the inclination of the bars, the disturbance
caused by electrical discharges, and the pressure exerted by
incoming fresh feed entering the processing zone, albeit to
a lesser extent.
Figure 11 is a frame from a high-speed camera record-
ing of a five-bar electrode-grizzly system showing mul-
tiple arcs being formed from a single discharge from the
Figure 10. Continuous laboratory-scale HVP Grizzly system installed at the JKMRC’s HVP Flexible Testing Facility
Figure 11. Frame of a video of the operation of the electrode-
grizzly system operating with five electrode bars