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m <br /> N <br /> XC <br /> m <br /> 3. PROCESS DESCRIPTION <br /> Material is to be blended from both the Camp Bird Mine and Revenue Mine. The feed ore, in a <br /> range of-40 mesh to -6 inches, is fed into an electrically driven jaw crusher at a rate of 10 tons <br /> per hour and crushed to nominally minus s/. inches or less. <br /> Discharge from the jaw crusher is hopper fed into an electrically driven 15 horsepower Roll Mill <br /> disc grinder(the "Roll Mill"). Discharge from Roll Mill is 80% passing at-80 mesh. Material over- <br /> 80 mesh is recirculated back through the Roll Mill until a-80 mesh screen size is achieved. <br /> Roll Mill discharge is fed into an electrically driven to a 40 horsepower, 5'x 8' Patterson Ball Mill <br /> (the "Ball Mill"). Process water and ground material are simultaneously introduced into the Ball <br /> Mill at a rate of 5.7 USGPM, creating a slurry of 66 percent concentration based on the weight of <br /> the process water and material. Material is further processed to nominally-140 mesh, discharging <br /> from the Ball Mill and fed to a conditioning tank for dilution down to nominal percent by weight. <br /> The purpose of a conditioning tank is to reduce slurry concentration from 66 percent solids by <br /> weight down to nominally 14 percent to 22 percent solids by weight with the introduction of <br /> additional water to accomplish the desired dilution. The tank has a capacity of 1000 US gallons <br /> and will be slightly elevated to allow bottom discharge to the wet shaker table. The material of <br /> construction shall be high-density Polyethylene,fitted with an electrically driven top-mount mixing <br /> style agitator to maintain precise slurry concentrations. Bottom discharge piping shall include a <br /> manual direct read flow meter for flow control across the wet shaker table. <br /> Discharge from the conditioning tank shall feed material to a series of Deister 6-RH-SA Wet, <br /> Shaker Tables, 2 '/z horsepower ("Shaker Tables"). This provision ensures laminar flow across <br /> Shaker Tables, dramatically affecting recovery efficiencies of dissimilar metals and mineral <br /> species in a standard flow stream. Segregated and collected material discharged from Shaker <br /> Tables shall be recovered in multiple receptacles, i.e., non-metallic barrels, for content analysis. <br /> Wet material shall be pumped as slurry into an 800-millimeter Micronics Filter Press ("Filter <br /> Press")for moisture removal,and that liquid,discharge,and material shall be analyzed for mineral <br /> and metal content. The moisture content of filter cake is anticipated to be less than 12 percent. <br /> The recovery metals shall be dried and loaded into 'super-sacks,' and discharge water from the <br /> Filter Press shall be recycled to the water circuit. <br /> Process water is initially provided as free-flowing water through portal channel. Water from the <br /> channel is pumped into the circuit and as the water flows the circuit will be discharged back into <br /> the portal channel. Water in the portal channel is handled within the current permitted water <br /> management and no change is required. The proposed process does not alter the current portal <br /> flow process. Water quality data from the circuit has been tested in a closed loop bench study <br /> with the data reported in Section 5"Water Analysis".Actual process circuit diagram is available in <br /> Section 4"Process Flow Diagram". <br /> Section 3a Shut Off Capability: <br /> 4 <br /> 1900 MAIN ST, UNIT 1 I PO BOX 1030 I OURAY CO 81427 <br />