Hard kaolin in the ceramic piece, which is used in which? What's the difference between washed kaolin and washed kaolin?
Whiteness difference is big, generally after light burning, kaolin whiteness will increase, and wash water will not significantly increase whiteness.
First of all, calcined kaolin is calcined, crystalline and raw soil has changed; and washed kaolin is only physical treatment, will not change the properties of raw soil.
Different uses. Depending on the calcination temperature, kaolin can be used as a papermaking additive and as a refractory aggregate. Washed kaolin is generally used as a filler for paper making.Moreover, calcined kaolin mainly refers to the hard kaolin (kaolinite), the original soil without adhesion, cannot be directly used as paper or refractory materials, after application of calcination; soil washed kaolin having adhesion, can be directly refractory adhesive or filler.
