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Centrifugal Modeling of Phosphatic Clay Consolidation

by D. G. Bloomquist, Univ of Florida, Gainesville, FL, USA,
F. C. Townsend, Univ of Florida, Gainesville, FL, USA,



Document Type: Proceeding Paper

Part of: Sedimentation Consolidation Models?Predictions and Validation

Abstract:

As a by-product of beneficiation, quantities of dilute clay slurry are produced which are stored in retention ponds. One method of accelerating consolidation is to surcharge the clay with a sand tailings cap which provides a foundation for reclamation. Centrifugal model tests were performed to evaluate the scaling time exponent between prototype and centrifugal tests and computer predictions. The results indicate that self-weight consolidation will achieve an average final solids content of approximately 21-23 percent in 2. 5 to 3 years. The decreasing permeabilities cause time spans of 15 plus years in order to reach these solids contents.

Subject Headings: Consolidated soils | Clays | Centrifuge models | Soil treatment | Retention basins | Phosphate | Permeability (soil)

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