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whereas manipulated variables were tailings and air flow rate set points. Figure 6.14
illustrates that good results can also be obtained with a constrained predictive con-
troller for a three-phase system.
6.5 Future Industrial Applications
Previous sections have shown that a significant amount of work has already been
done at the academic level to develop column flotation sensors and design suitable
process control strategies. However, in spite of this, industrial applications are still
rather scarce or nil. It is valid then to ask how the current industry could, from
a practical point of view, benefit from these developments and what needs further
investigation.
Figure 6.11 Pilot flotation column set-up
 
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