Flotation Curve as shown in Fig. 6. Interestingly, with the collector
and frother level fixed at 2.0 kg diesel/t dry solids and 40 ppm
MIBC, there was relatively little scatter in the results with respect
to the Tree Flotation Curve. In practice a separation condition close
to the knee of the curve should be targeted in order to maximize
the combustible recovery while achieving an acceptable product
ash %. Thus, although much of the data were well aligned with
the Tree Flotation Curve, the combustible recoveries extended to
low levels. Clearly, it would be important to ensure the recovery
did not fall away to these low levels due to random disturbances.