Titanium Dioxide

Titanium dioxide has the highest opacity of the entire range of white pigments plus a very good whitening power. These properties not only make it attractive for the production of paper. It is also of significant interest for paints and lacquers, as sun blockers in sun tan lotions, as a constituent of solar cells and ceramic capacitors or as nano particles for self-cleaning surfaces.

The chloride process has established itself worldwide for the recovery of titanium dioxide. This process has the advantage that the chlorine remains in the process circuit to a large extent and no environmentally hazardous dilute acid is produced. GEA Westfalia Separator supports this process through the integration of a special nozzle separator.

The opacity as well as the optimum consistency and brilliance of the titanium dioxide heavily depends on the size of the particles. The use of centrifuges from GEA Westfalia Separator makes it possible to classify the titanium dioxide so that there is a particularly large number of superfine particles in the quality-enhancing size of approx. 0.2 to 1 μm. Rotary brush strainers are installed upstream of the nozzle separators to remove the coarser fractions and hence protect the nozzles from possible blockage.