2932 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
baseline figure of 2.2 was improved to 2.8 after 10 passes,
and 2.91 and 2.8 after 20 and 30 passes respectively. .
The results show that, after 10 passes, the 4E recovery
was improved by 5.8%, a figure which was reduced to 2.4%
after 20 passes. As observed with the earlier samples, a fur-
ther 10 passes resulted in a 1.5% loss when compared to the
baseline. In all cases, however, the Mach preconditioning
resulted in an increase in grade of around 6 g/t, this being
due to the reduced mass pull being achieved under these
conditions.
Final Tailings
Figures 8 and 9 respectively represent the differential mass
pull-recovery and grade-recovery profiles of the Final
-30
-20
-10
0
10
20
-20 -10 0 10
Mass pull diff. (%)
0 Pass 5 Pass 10 Pass 15 Pass
Figure 8. Mass pull-recovery differential relationships for the Final Tailings (reference =
14 minutes)
-3
-2
-1
0
1
2
3
-30 -20 -10 0 10 20 30
4E Recovery diff. (%)
0 Pass 5 Pass 10 Pass 15 Pass
Figure 9. Grade-recovery differential profiles for Final Tailings
4E
Recovery
d
.
(%)
4E
Grade
d
iff .
(g/t)