Method of producing wollastonite & ceramic bodies containing wollastonite

Abstract

A method of using dicalcium silicate, and particularly dicalcium silicate slag, to produce wollastonite. In a particular embodiment, the method is used for the production of ceramic products, such as wall tile, containing wollastonite. The method includes preparing a batch mix comprising dicalcium silicate slag and a silica source, and preferably a fluxing agent, then firing the batch mix to produce wollastonite. The method can further include adding a binder material and water to the batch mix, and then pressing the resulting batch mix to form a desired shape, prior to firing. Also, a composition, such as a ceramic product, than is produced from a dicalcium silicate slag mixed with a silica source and fired such than the dicalcium silicate in the slag and the silica source undergo a phase change to become wollastonite.

Dependencies are inferred from the claim text.