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.

Abstract: A conveyor for use in hydraulic mining operations to convey a slurry of water and heavy mined aggregate under conditions where the grade is insufficient to effectively accommodate gravity flow. The conveyor comprises a flume trough having a generally flat lower surface and a continuous belt conveyor having a lower reach disposed within the trough in engagement with the lower surface thereof. In use, the slurry is introduced into the trough and the belt conveyor is driven to move the lower reach in the direction that it is desired to move the slurry. Heavy aggregate within the slurry settles out onto the lower reach of the belt conveyor and is conveyed thereby. Water and suspended aggregate is moved within the flume under the influence of gravity, if any, and the influence of the moving lower reach of the belt conveyor and the moving heavy aggregate carried thereby.