3172 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
As the concentration of OA increases, the absolute
mass and water pull increase as well. At a concentration
of 1000 g/t OA almost 90 wt% of the entire feed mass is
found in the concentrates (Figure 5, left), resulting in a
similar grade of LiAlO2 (Figure 4, right) and a similar size
distribution, compared to the feed (Figure 5, right). The
same tendency can be observed for the tests using 750 g/t
OA. Although the selectivity for gehlenite, as seen in the
Fuerstenauplots for the tests using 500 g/t, is reduced if
higher OA amounts are used, there is still no selectivity for
LiAlO2, as all data points lie on the blue line. This indi-
cates, that the recovery of particles with higher OA amounts
is rather unselective, since almost all particles of the feed
report to the concentrate, regardless of their composition.
The probability densities f
n
C ,f
n
T and f
n
F of descrip-
tor vectors were computed for the three following cases:
considering all particles, particles exclusively containing
LiAlO2 and particles exclusively containing gehlenite. In
the analysis of the latter two particle fractions, particles
that contain both LiAlO2 and gehlenite were excluded. This
differentiation allows investigating the separation behavior
among the different particle types. The mean area-equiva-
lent diameter (d
A
)as listed in Table 2 and the mean aspect
ratio ({r )are extracted from the probability densities for
the feed, concentrate and tailings of the froth flotation
tests. A noteworthy observation is that particles containing
LiAlO2 tend to be slightly finer than other particles. Across
all froth flotation tests finer particles are more likely to be
separated into the concentrate. Increasing the OA concen-
tration from 500 g/t to 750 g/t results in a slight increase
of d
A
in the concentrate. However, when further increas-
ing the concentration to 1000 g/t, the d
A
of particles in
the concentrate decreases again. Moreover, {r of particles
remains consistent 0.59–0.64 across the feed, concentrate,
Figure 5. (left) Mass pull plotted against water pull, (right) sum distribution of particle sizes in feed, concentrates C1, C2, C3
and tailing T with 500, 750 and 1000 g/t OA addition in froth flotation
Figure 6. Froth at flotation time of 30 s until the first concentrate was taken, (left) at a collector
concentration of 500 g/t OA, (middle) 750 g/t OA and (right) 1000 g/t
As the concentration of OA increases, the absolute
mass and water pull increase as well. At a concentration
of 1000 g/t OA almost 90 wt% of the entire feed mass is
found in the concentrates (Figure 5, left), resulting in a
similar grade of LiAlO2 (Figure 4, right) and a similar size
distribution, compared to the feed (Figure 5, right). The
same tendency can be observed for the tests using 750 g/t
OA. Although the selectivity for gehlenite, as seen in the
Fuerstenauplots for the tests using 500 g/t, is reduced if
higher OA amounts are used, there is still no selectivity for
LiAlO2, as all data points lie on the blue line. This indi-
cates, that the recovery of particles with higher OA amounts
is rather unselective, since almost all particles of the feed
report to the concentrate, regardless of their composition.
The probability densities f
n
C ,f
n
T and f
n
F of descrip-
tor vectors were computed for the three following cases:
considering all particles, particles exclusively containing
LiAlO2 and particles exclusively containing gehlenite. In
the analysis of the latter two particle fractions, particles
that contain both LiAlO2 and gehlenite were excluded. This
differentiation allows investigating the separation behavior
among the different particle types. The mean area-equiva-
lent diameter (d
A
)as listed in Table 2 and the mean aspect
ratio ({r )are extracted from the probability densities for
the feed, concentrate and tailings of the froth flotation
tests. A noteworthy observation is that particles containing
LiAlO2 tend to be slightly finer than other particles. Across
all froth flotation tests finer particles are more likely to be
separated into the concentrate. Increasing the OA concen-
tration from 500 g/t to 750 g/t results in a slight increase
of d
A
in the concentrate. However, when further increas-
ing the concentration to 1000 g/t, the d
A
of particles in
the concentrate decreases again. Moreover, {r of particles
remains consistent 0.59–0.64 across the feed, concentrate,
Figure 5. (left) Mass pull plotted against water pull, (right) sum distribution of particle sizes in feed, concentrates C1, C2, C3
and tailing T with 500, 750 and 1000 g/t OA addition in froth flotation
Figure 6. Froth at flotation time of 30 s until the first concentrate was taken, (left) at a collector
concentration of 500 g/t OA, (middle) 750 g/t OA and (right) 1000 g/t