University of Kentucky Research Foundation

John Groppo

Thomas Lee Robl

A method for selective separation of particles from a particle-containing material includes preparing a slurry of the particle-containing material and a dispersant, passing the slurry through a hydraulic classifier in a first direction, establishing a particle flow in a direction that is different from the first direction, and recovering particles having a mean particle size of about 2-7 &#x3bc;m. The flow of particles defines a cross-current flow relative to the slurry feed direction. The method further includes providing the classifier with an interior divider assembly defining at least one inclined channel. The divider assembly typically includes a plurality of substantially parallel dividers separating the classifier into multiple channels having a substantially equal internal volume. A hydraulic classifier for separating particles having a mean particle size of from about 2-7 &#x3bc;m in accordance with the present method is provided also.

Method for hydraulically separating carbon and classifying coal combustion ash

A novel method for producing fly ash material with a range of particle sizes from about 2.0 to about 4.0 &mgr;m is provided utilizing superplasticizers. The method produces fly ash material suitable for use as filler material in the plastics industry and super pozzolan for the concrete industry.

Growing community of inventors

Wilmore, KY, United States of America

John Groppo