What's the difference between calcined kaolin and washed kaolin?
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 directly do refractory binder or paper packing.As a filler of paper, the whiteness of calcined kaolin is very little, and the cost is relatively high
Secondly, the whiteness difference is relatively large, generally after light burning, kaolin whiteness will increase, and wash water will not significantly increase the whitenessThird, the use of different. According to different calcination temperature, kaolin can be used as papermaking additives and refractory aggregate, and washed kaolin is generally used as papermaking filler
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
