XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 2895
Jg values. For low Vt (4.7 m/s), low frother concentra-
tion (30 g/t), increase in collector concentration showed a
reduction in entrainment flow at low Jg (0.4 cm/s) and an
increase at high Jg (0.5 cm/s). At higher frother concentra-
tion (60 g/t), increase in collector concentration caused a
reduction in entrainment flow, except at high Jg value (0.5
m/s).
Analyzing the results using DoE approach (Figure 7)
helped in making the following conclusions. The biggest
influencing variable on overall ENT for all the concentrates
in this experimental campaign was Jg, which was marginally
significant, where higher Jg resulted in higher ENT. Vt and
frother concentration also enhanced ENT, while collector
concentration had a negative impact, although all these
three variables were not found to be statistically significant.
The results in Figure 6 and Figure 7 suggests that the
interactions between different process variables exist. Pareto
chart indicating first and second order interactions are pre-
sented in Figure 7. It can be observed that frother concen-
tration and Vt combined, have the biggest overall effect
on ENT, and is significant (p value 0.05, i.e., 0.020).
Combination of frother concentration and Jg was found
to be marginally significant (p =0.090), and Jg alone was
Figure 6. Pareto chart on left (A),and main effect plot on right (B),for effect of different input parameters on overall
entrainment degree (ENT).InA, negative sign of coefficient meansthat ENT was reduced with an increase in the level of input
variable, while positive coefficient indicates an increase in ENT with an increase in the level of input process variable
Figure 7. Order of magnitude for first and second level interactions of input process variables and the magnitude of their effect
on ENT
Jg values. For low Vt (4.7 m/s), low frother concentra-
tion (30 g/t), increase in collector concentration showed a
reduction in entrainment flow at low Jg (0.4 cm/s) and an
increase at high Jg (0.5 cm/s). At higher frother concentra-
tion (60 g/t), increase in collector concentration caused a
reduction in entrainment flow, except at high Jg value (0.5
m/s).
Analyzing the results using DoE approach (Figure 7)
helped in making the following conclusions. The biggest
influencing variable on overall ENT for all the concentrates
in this experimental campaign was Jg, which was marginally
significant, where higher Jg resulted in higher ENT. Vt and
frother concentration also enhanced ENT, while collector
concentration had a negative impact, although all these
three variables were not found to be statistically significant.
The results in Figure 6 and Figure 7 suggests that the
interactions between different process variables exist. Pareto
chart indicating first and second order interactions are pre-
sented in Figure 7. It can be observed that frother concen-
tration and Vt combined, have the biggest overall effect
on ENT, and is significant (p value 0.05, i.e., 0.020).
Combination of frother concentration and Jg was found
to be marginally significant (p =0.090), and Jg alone was
Figure 6. Pareto chart on left (A),and main effect plot on right (B),for effect of different input parameters on overall
entrainment degree (ENT).InA, negative sign of coefficient meansthat ENT was reduced with an increase in the level of input
variable, while positive coefficient indicates an increase in ENT with an increase in the level of input process variable
Figure 7. Order of magnitude for first and second level interactions of input process variables and the magnitude of their effect
on ENT