KINETICS AND MECHANISM OF HYDROTHERMAL REACTION IN LIME-QUARTZ-WATER SYSTEM.

Abstract

A kinetic study was made on the hydrothermal reaction between lime and quartz, and in this reaction the effects of CaO/SiO//2 ratio, particle size of quartz and added kaolin were discussed. Unreacted lime, unreacted quartz, combined alumina and combined water of the specimens were determined. The chemical composition of the products, rates of reaction and depths of the reacted quartz were calculated from the experimental data. It was found that the reaction of lime was controlled by dissolution and that the reaction of quartz was controlled by diffusion through the products layer around each quartz grain.