The foremost step in the process of preparing Kaolin is, it is firstly extracted from the mines and then it is loaded in Truck and sent for further processing.
The China Clay (kaolin) is mixed with water to create milk-shake-like slurry. Slurry is simply the water and dispersed clay mixture, which puts the clay particles in suspension.
The slurred China Clay (kaolin) is usually transported through pipelines to gritting facilities, where sand, mica and other impurities are extracted with the help of gravity.
We feed 35-40% solid concentration slurry in to the filter press by stroke pumps to separate water out of slurry. Due to stickiness of the clay we go up to 8 kg/cm2 pressure. After formation of clay cake the moisture content varies from 20-25%.
With both the fine and coarse China Clay (kaolin) particle fractions, brightness is enhanced through one or move processes which will remove iron, titanium, organic, and other undesirable materials.