Additional investigations on the separation of titanoferrous impurities from kaolin by high shear pretreatment and froth flotation - Part I

Re-optimisation of collector dosage based on these improved pretreatment conditions helped to remove more titanoferrous impurities. Lowest product titania achieved is 0.35% from a feed value of 1.06%. The flotation product measured 85% ISO brightness at a clay recovery of 86.4%. The brightness was further improved to 85.7% by reductive bleaching.