Ecc International Limited

Ecc America Inc.

Charles D Anderson

Carl S Cummings

J Richard Hudson

R Brock McNeely

Andrew L Wilcher

Shannon S Anderson

James G Brantley

An improvement is disclosed in the method for producing a calcined kaolin clay powder for use in paper manufacture, by the steps of wet beneficiating a kaolin crude, drying the beneficiated crude, milling the dried beneficiated crude to provide a calciner feed, and calcining the feed to destroy the crystallinity thereof and provide an amorphous calcined kaolin powder. According to the improvement, the dried beneficiated crude is milled and classified to provide a calciner feed having substantially no +325 mesh residue, and not greater than 0.0003% by weight +635 mesh residue. This enables lowered abrasion in the calcined powder, and lowered viscocity in the slurried calcined powder product to thereby enable a higher solids slurry.

Method for producing low abrasion kaolin pigment

An improvement is disclosed applicable to the production of calcined and hydrous kaolins in particulate form. A process and system are disclosed in which the calciner is integrated with a filtration process and a preceding spray dryer by passing the dust-laden calciner hot off-gases to the spray dryer to achieve savings in energy. Waste heat from the calciner, and concomitantly dustlike clay particles carried in the off-gas, are thereby passed to the dryer and subsequently treated and their values recovered.

Kaolin calciner waste heat and feed recovery process

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Warthen, GA, United States of America

Charles D Anderson