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FLSmidth USA, Inc. <br /> 7158 S FLSmidth Drive •Midvale • UT 84047-5559 • USA Lh M ' D T H <br /> Filter press full-scale filtration rates will vary depending on the mechanical and pumping <br /> time, the filter's size and model, configuration of the filter press as well as the customer's <br /> desired cake moistures. The recommended operating conditions are presented in Table 9. It <br /> should be noted that the 15.5-bar filter feed pressure can offer an increased filtration rate <br /> at a given cake moisture content, but requires a two-stage pumping system. Depending on <br /> the cake moisture requirement and sizing of the full scale filter presses, high filter feed <br /> pressure option should be considered. <br /> In general, the 50-mm cake condition resulted in higher filtration rates at comparable cake <br /> moisture contents to the 32-mm cake, but the 32-mm cake resulted in the lowest ultimate <br /> cake moisture. <br /> Table 9: Filter Press Testing Results & Recommended Sizing Parameters <br /> Process Parameter Zn Ro Tailings <br /> Chamber Condition Recessed <br /> Chamber Thickness mm 50 1 32 <br /> Feed Solids Concentration, wt% 60 <br /> Filter Media 18-oz. Felt <br /> Feed Pressure bar 9.7 <br /> Cake Consolidation Time min 1.5 1 0.8 <br /> Drying Pressure bar 6.9 <br /> Cake Moisture, wt% 14.9-20.0 13.3-20.6 <br /> Filtration Rate kg/M2/hr 160-427 105-303 <br /> Dry Cake Density, k /ft3 1,710 1,683 <br /> Appendix Guide <br /> Appendix A - Proprietary and Confidential Information <br /> Appendix B - Disclaimer and Copyright Information <br /> Appendix C - Particle Size Analysis <br /> Appendix D - 2-L Static Test Results <br /> Appendix E - Filtration Graphs <br /> Page 1 22 <br />