Freeport Minerals Company

Donald L Chamberlain

Robert J Sweeney

Tilting filter pans is disclosed having generally parallel leading and trailing sidewalls which are sloped at an angle to permit increased filtration rates for a predetermined filtering efficiency, and also to permit increased filtering efficiency where the feed rate is constant. The feed is a slurry from which the liquid is removed, and the filter cake being dumped by rotation of each filter pan at a predetermined point of movement of the filter pan along a cyclical path. Hold-down devices having a reduced volume are also used in combination with the improved pan design, so that an increased filtration rate is possible due to decrease in the required filter cake height. A cam arrangement is provided for turning the pans with minimum stress in a minimum length of pan travel, while avoiding collisions between adjacent pans and while permitting washing of each pan.

Tilting pan filters and cam therefor

Tilting filter pans having generally parallel leading and trailing sidewalls which are sloped at an angle to permit increased filtration rates for a predetermined filtering efficiency, and also to permit increased filtering efficiency where the feed rate is constant. Drainage of the pans may also be improved. The feed is a slurry from which the liquid is removed, and the filter cake is dumped by rotation of each filter pan at a predetermined point of movement of the filter pan along a cyclical path.

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Baton Rouge, LA, United States of America

Donald L Chamberlain