Kinetic studies of the dehydroxylation and crystallization of raw kaolinite and fluorides-modified kaolinite

摘要: The effect of some fluoro compounds on the dehydroxylation and crystallization kaolinite was investigated using thermal analysis. Samples were prepared starting from raw kaolin (K-0) by adding 1 mass% fluorine, introduced as LiF (K-Li), NaF (K-Na) CaF2 (K-Ca), respectively. results show that peak temperatures process are less influenced fluorides presence, whilst decrease in presence fluorides, which confirm mineralizer process. activation energies processes calculated isoconversional methods described Kissinger–Akahira–Sunose Vyazovkin. For process, values energy a function conversion extent not significantly presence. all samples with higher than those sample without entire range extent.