Patent ID: 6368527
Filing Date: 2002-04-09
Classification: C03C,C04B

Abstract:
A process for molding an article made from perlite material, comprising:a. grinding raw perlite material to a particle size <200 microns, b. grinding silicon carbide material as gas forming reagent, c. mixing said ground perlite and silicon carbide materials to form a homogeneous powder mass, d. humidifying the powder mass to a humidity level to display the property of thixotropy, e. introducing the thixotropic mixture into a mold and vibrating the mixture to distribute the mixture evenly in the mold; then upon ceasing vibration allowing the mixture to solidify into a molded article, f. removing the article from the mold and heating the article at a temperature between 1200Â° C. and 1350Â° C.; and g. cooling the resulting article.