XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 3455
(pictured earlier) to collect the solids accumulating periodi-
cally, and this is then moved to their tailings dam. In steady
state, this will be gravity fed onto a double screw conveyor
and then fed onto conveyor belt series to send directly to
the tailings dam.
Also, for the duration of the pilot trial, the resultant
clear centrate from the centrifuge is fed by gravity back into
the wastewater collection pond. The slight reduction in %
of overall solids in the feed (from typically the 14%–16%
range down to the 11.5%–15% range) can be largely
ascribed to this recirculation (Figure 8).
FEED CONDITION AND COMPOSITION
Waste process water and depleted flotation feed that has
been collected in the tailings tank is then agitated and
fed to the decanter centrifuge through its 75mm (3-inch)
feed port.
As per the laboratory analysis in (Figure 9) of this feed
material shows, the suspended solids range from as low
as 11% to as high at 23% w/w. Practically, the customer
advised that they found that it is mostly in the 14% to 16%
range.
Feed pressure is maintained between 1 and 2 bar (15 to
30 psi) by a positive displacement, self-priming lobe pump.
Particle size distribution of the solids in the feed to the cen-
trifuge show a range from Dv10 at just under 11µm Dv50
at around 70µm and Dv90 at over 200µm.
Typical oversize “tramp” stones that
bypassed the mesh filter
The “sea sand” appearance of the silical in the
feed
Figure 8.
Figure 9.
(pictured earlier) to collect the solids accumulating periodi-
cally, and this is then moved to their tailings dam. In steady
state, this will be gravity fed onto a double screw conveyor
and then fed onto conveyor belt series to send directly to
the tailings dam.
Also, for the duration of the pilot trial, the resultant
clear centrate from the centrifuge is fed by gravity back into
the wastewater collection pond. The slight reduction in %
of overall solids in the feed (from typically the 14%–16%
range down to the 11.5%–15% range) can be largely
ascribed to this recirculation (Figure 8).
FEED CONDITION AND COMPOSITION
Waste process water and depleted flotation feed that has
been collected in the tailings tank is then agitated and
fed to the decanter centrifuge through its 75mm (3-inch)
feed port.
As per the laboratory analysis in (Figure 9) of this feed
material shows, the suspended solids range from as low
as 11% to as high at 23% w/w. Practically, the customer
advised that they found that it is mostly in the 14% to 16%
range.
Feed pressure is maintained between 1 and 2 bar (15 to
30 psi) by a positive displacement, self-priming lobe pump.
Particle size distribution of the solids in the feed to the cen-
trifuge show a range from Dv10 at just under 11µm Dv50
at around 70µm and Dv90 at over 200µm.
Typical oversize “tramp” stones that
bypassed the mesh filter
The “sea sand” appearance of the silical in the
feed
Figure 8.
Figure 9.