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Laterite Leach Tests

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Thickening and Vacuum Filtration Evaluation of Westmoreland Uranium <strong>Leach</strong> Residue Slurry<br />

Laramide Resources<br />

___________________________________________________________________________________<br />

9.0 RECOMMENDED FILTER SIZING<br />

Based on the filtration testwork results the recommended filter size to process the<br />

design solids feed rate of 30 t/h of Westmoreland <strong>Leach</strong> Residue, including a<br />

cake wash ratio of one, has been calculated. The results of these calculations are<br />

summarised in Table 9.0.<br />

May 2011<br />

Table 9.0 Recommended Filter Sizing – <strong>Leach</strong> Residue<br />

WESTMORELAND LEACH RESIDUE - FILTER SIZING<br />

Filter Type HBF<br />

Solids Feed Rate t/h/ 30<br />

Feed Solids % w/w 60<br />

Vacuum kPag -70<br />

Cake Thickness mm 11<br />

Cake Moisture % 23<br />

Cake Wash Yes<br />

Cake Wash Ratio kg/kg solids 1.0<br />

Filtration Rate kg/h/m 2 472<br />

Filtration Area Required m 2 63.5<br />

Selected Filter 2.5M65<br />

Selected Model Filtration Area<br />

Available m 2<br />

No. of Filters Required 1<br />

65<br />

CONFIDENTIAL Page 23

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