2020 XXXI International Mineral Processing Congress 2024 Proceedings/Washington, DC/Sep 29–Oct 3
maximum in the domain (Figure 3). RNb follows vertical
lines because the fluidization pressure was not significant
in Equation 7. For RSn and RTa, maximum recoveries are
achieved when both rotation speed and fluidization pres-
sure are at their maximum. The recoveries are minimally
affected by fluidization pressure variation on a diagonal line
passing through the coordinates [250, 10] and [100, 1]. On
this line, the two phenomena compensate each other, and
on the left and right sides of this line, recoveries decrease at
the same rate.
ERSn, ERNb, and ERTa contours roughly follow the same
orientation as the recovery contours, but no maximum is
reached in the domain. Minimal values are observed for
high rotation speed and low fluidization pressure, while
maximal values occur for low rotation speed and high flu-
idization pressure. The gradient of variation increases as the
contours get closer to low rotation speed values, indicating
that a small variation in fluidization water pressure impacts
the enrichment ratio.
RRb and ERRb exhibit the same behaviour within the
experimental domain, reaching their maximum at high
rotation speed and low fluidization pressure. In other
words, for Rb, both recovery and grade are favoured by a
high rotation speed. The effect of fluidization pressure is to
Figure 3. Contour plots of recoveries (right) and enrichment ratio (left) of Sn, Nb and Ta (top) and Rb (bottom)
maximum in the domain (Figure 3). RNb follows vertical
lines because the fluidization pressure was not significant
in Equation 7. For RSn and RTa, maximum recoveries are
achieved when both rotation speed and fluidization pres-
sure are at their maximum. The recoveries are minimally
affected by fluidization pressure variation on a diagonal line
passing through the coordinates [250, 10] and [100, 1]. On
this line, the two phenomena compensate each other, and
on the left and right sides of this line, recoveries decrease at
the same rate.
ERSn, ERNb, and ERTa contours roughly follow the same
orientation as the recovery contours, but no maximum is
reached in the domain. Minimal values are observed for
high rotation speed and low fluidization pressure, while
maximal values occur for low rotation speed and high flu-
idization pressure. The gradient of variation increases as the
contours get closer to low rotation speed values, indicating
that a small variation in fluidization water pressure impacts
the enrichment ratio.
RRb and ERRb exhibit the same behaviour within the
experimental domain, reaching their maximum at high
rotation speed and low fluidization pressure. In other
words, for Rb, both recovery and grade are favoured by a
high rotation speed. The effect of fluidization pressure is to
Figure 3. Contour plots of recoveries (right) and enrichment ratio (left) of Sn, Nb and Ta (top) and Rb (bottom)