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3.7 Crushing <br /> Ore is transported by mine cars to the slusher tunnel (Coarse Ore Bin), which has the rail siding <br /> above the crushing gallery. The ore cars are side dumped to an approximate 400-ton coarse ore <br /> bin that sits directly above a plate feeder, which slowly delivers ore to the first conveyor to feed <br /> the primary jaw crusher. <br /> Material leaving the primary jaw crusher is approximately —2 1/2". Material is conveyed from <br /> the primary jaw crusher to a 3/4 inch screen. Oversize material from the screen is conveyed to a <br /> secondary jaw crusher and -3/4-inch fines are conveyed to the rod mill for first stage grinding. At <br /> both jaw crushers dust is suppressed using water sprays. The -3/4" materials from the screening <br /> and secondary crushing is delivered to the rod mill along with process water where the ore is <br /> ground to p80 of approximately 3/8-inch minus. <br /> Slurry discharge from the rod mill is delivered via slurry pumping to one of two locations. In the <br /> initial first months to a year of operation the slurry will report to the ball mill discharge tank <br /> which then reports to Derrick screens for sizing. Once final design and construction of two <br /> 12,690-gallon slurry retention tanks are finalized, the slurry will be pumped to those tanks, <br /> which will be located in the previously constructed fine ore bin. The two slurry storage tanks are <br /> currently being engineered and will not be in place when the mill is commissioned. The slurry <br /> storage tanks are for surge capacity and the mill can be started without them. The slurry tanks <br /> will be added to the circuit in 2022. A list of tanks described in this section can be found in Table <br /> D-2. <br /> Table D-3 List of Tanks in the Mill <br /> Tank Name Size (gallons) Number of Tanks <br /> Slurry Storage Tanks 12,690 EA 2 <br /> Lead Conditioning Tank 1064 1 <br /> PB Lead cleaner 1st flotation cell 449 1 <br /> PB Lead cleaner 2nd flotation cell 290 1 <br /> Lead cleaner column 214 1 <br /> Lead concentrate filter feed tank 933 1 <br /> Zinc conditioning tanks 1,064 EA 2 <br /> Zinc Rougher Flotation Cell 1320 1 <br /> PB Rougher Flotation Cell 1320 1 <br /> zinc rougher scavenger flotation cells 1,320 EA 2 <br /> Zinc cleaner flotation cells 1,320 EA 2 <br /> Zinc cleaner column 214 1 <br /> Zinc concentrate filter feed tank 1,728 1 <br /> Process water tank 1,800 1 <br /> Tailings filter feed tank 1,800 1 <br /> Filtrate Tank 750 1 <br /> Tailings Thickener 33,000 1 <br /> Revenue Mine <br /> Amendment 02 D-12 <br /> Updated August 2022 <br />