Fig. 3 shows the flotation recoveries of ilmenite, titanaugite, and
forsterite as a function of pH using sodium oleate (2.0 10-4M).
The results indicate that the floatability of ilmenite is better than
that of titanaugite and forsterite. The floatability of ilmenite is
good at pH > 4.0. Titanaugite possesses certain floatability at pH
4.0–6.0 and pH > 10.0, and forsterite possesses certain floatability
at pH 5.0–7.0 and pH > 9.0.