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Reagent <br />Name <br />Addition Location <br />pH Modifier <br />Lime <br />Flotation conditioning tank; Leach tanks <br />Flotation <br />Collector <br />Potassium amyl <br />xanthate <br />Flotation conditioning tank, flotation cells <br />Flotation <br />Modifier <br />Dithiophosphate <br />Flotation conditioning tank, flotation cells <br />Frother <br />Long Chain Alcohol <br />Flotation Cells <br />Cyanide <br />CN <br />Leach Tanks <br />Flocculant <br />Polyacrylamide <br />Ore thickener, Concentrate thickener, High pH <br />thickener <br />Activated Carbon <br />Carbon <br />Recovery Tank <br />Binder <br />Cement <br />Pug Mixer <br />6.2 High Grade Mill Facilities Operations <br />Table 6 -1 Mill Reagents <br />6.2.1 Crushing and Grinding <br />Higher grade ore segregated during mining will be fed through the existing crusher in a <br />batch type process on an as needed basis (approximately weekly). Once crushed to <br />minus 3 inch, higher grade ore will be transported to the grinding circuit in the High <br />Grade Mill facilities by mine haul trucks loaded from the LOB. Three different qualities <br />of higher grade ore type will be stockpiled near the High Grade Mill facilities in three <br />stockpiles capable of holding up to 110,000 tons (-70,000 yd A reclaim stockpile will <br />be created by blending the differing higher grade ore types from the three stockpiles with <br />a front end loader. Higher grade ore from the reclaim stockpile will be fed into the <br />grinding circuit with an apron feeder and reclaim conveyor. <br />The grinding circuit will reduce the size of the higher grade ore material from minus 3 <br />inch to minus 150 microns. The grinding circuit will consist of a single rod mill <br />operating in conjunction with a ball mill. The crushed ore will be fed into the rod mill <br />along with water. The water will be recycled within the grinding and flotation circuits <br />with makeup water added as needed. The rod mill is a rotating drum that uses steel rods, <br />approximately four inches in diameter by twenty inches in length, to reduce the particle <br />size of the ore. The rods, rock, and water will tumble as the rod mill rotates, breaking up <br />the rock particles. As the rods tumble they will wear down over time and break apart <br />inside the mill. <br />Cripple Creek & Victor Gold Mining Company <br />Cresson Project Mine Life Extension 2 <br />6 -3 <br />