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i~ <br />the double deck vibrating screen and then to either the heap <br />leach stockpile, fine-ore bin or quaternary crusher for final <br />' crushing. Figure C-6 shows the crushing process. Figure C-5 <br />shows the location of the crushing facilities. <br />D.4.2 Crusher Dust Control <br />' Dust control at the primary, secondary, and tertiary <br />' crushers will be necessary. The dust controls wil- be permitted <br />through the Colorado Department of Health, Pir Pollution <br />Control Division. Dust will be minimized by periodic watering <br />t during the crushing process and the use of several dust <br />suppression/collection systems. <br />t D.5 Mill Facilities <br />1 D.5.1 Descriotion of the Millinca Process. <br />' The mill facilities are located between the leach pad <br />.. and south waste rock disposal area (Figure C-?). The mill <br />' facilities will process the higher-grade ore using a <br />conventional flotation process as shown on Figure C-7. <br />' The material from the fine-ore bin is first sent to a <br />' ball mill to grind it to minus 250 microns. From the ball mill, <br />the material is cycloned and sent back to the ball mill or sent <br />to the flotation cell. The flotation cell separates the <br />t concentrates from the tailings. Approximately 90 percent of <br />the volume will be separated as tailings and sent to the <br />tailings disposal facility. The remaining 10 percent <br />concentrates will be reground in the regrind mill to minus 75 <br />microns and then processed through a carbon-in-leach circuit. <br />Pregnant solutions from the leach pad will be pumped to <br />the mill for processing. The stream of pregnant water from the <br />carbon-in-leach circuit will be combined with t:he pregnant <br />D-32 <br />