XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3 2687
that the region between the two experimental lines coin-
cides with the white region of the theoretical (simulated)
solution in the (qU, qF)-plane. The qualitative agreement
between the experimental data and the model must be con-
sidered very good, taking into account that the theoretical
model contains several idealized assumptions and several
parameters whose values were taken from the literature for
a general sludge. The model prediction of the froth level zfr
is given by the yellow surface in each subplot of Figures 5.
The qualitative agreement between the model and
experiments lies in the fact that both the model and the
experiments confirm that it is only for a small region in
Table 2. Conditions for steady states experiments
Case 1 2 3 4 5
qG [cm/s] 1.3 1.8 2.3 1.8 1.8
q
W [cm/s] 0 0 0 0.3 0.5
qU [cm/s] [0,1.63] [0,1.63] [0,1.63] [0,1.63] [0,1.63]
q
F [cm/s] [0,2] [0,2] [0,2] [0,2] [0,2]
Figure 3. Experiments 1–3 (no wash water added): stability regions enclosed between two curves formed by points in the (q
U ,
q
F )plane
Figure 4. Experiments 4–5 (with wash water added): stability regions enclosed
between two curves formed by points in the (qU, qF) plane
Table 3. Parameters used in simulations
ϕC nS nb vterm dcap
0.74 0.46 2 15 [cm/s] 2
that the region between the two experimental lines coin-
cides with the white region of the theoretical (simulated)
solution in the (qU, qF)-plane. The qualitative agreement
between the experimental data and the model must be con-
sidered very good, taking into account that the theoretical
model contains several idealized assumptions and several
parameters whose values were taken from the literature for
a general sludge. The model prediction of the froth level zfr
is given by the yellow surface in each subplot of Figures 5.
The qualitative agreement between the model and
experiments lies in the fact that both the model and the
experiments confirm that it is only for a small region in
Table 2. Conditions for steady states experiments
Case 1 2 3 4 5
qG [cm/s] 1.3 1.8 2.3 1.8 1.8
q
W [cm/s] 0 0 0 0.3 0.5
qU [cm/s] [0,1.63] [0,1.63] [0,1.63] [0,1.63] [0,1.63]
q
F [cm/s] [0,2] [0,2] [0,2] [0,2] [0,2]
Figure 3. Experiments 1–3 (no wash water added): stability regions enclosed between two curves formed by points in the (q
U ,
q
F )plane
Figure 4. Experiments 4–5 (with wash water added): stability regions enclosed
between two curves formed by points in the (qU, qF) plane
Table 3. Parameters used in simulations
ϕC nS nb vterm dcap
0.74 0.46 2 15 [cm/s] 2