STUDY ON ENHANCING THE WHITENESS OF CALCINED KAOLIN BY USING ADDITIVE

摘要

To meet some special requirements such as pa- per filler, ceramic titanium white and synthetic 4A zeolite, the raising whiteness of calcined kaolin has become more and more important. The calcined experiments were carried out with and without additive to increase the whiteness of cal- cined kaolin. Results show that additive of chloride (A) or oxides can obviously increase the whiteness of calcined kaolin. Meantime, the mechanisms of enhancing the whiteness of cal- cined kaolin were discussed.