PRODUCTION OF HIGHLY PURE SANDY SYNTHETIC SILICA, AND PRODUCTION OF HIGHLY PURE SYNTHETIC QUARTZ GLASS MOLDED PRODUCT

摘要

PROBLEM TO BE SOLVED: To produce highly pure sandy synthetic silica having the same or higher purity as that produced by an oxyhydrogen flame medium method. ;SOLUTION: This method for producing the highly pure sandy synthetic silica by a liquid phase reaction comprises producing a gel from the solution or dispersion of a raw material, drying the gel and calcining the dried gel. Therein, the dried gel is fed into the calcination process followed to the drying process through a flexible cylinder having a binding or unbinding means.;COPYRIGHT: (C)1997,JPO