65 TPD 2023The Copper Mountain mill flowsheet is currently a conventional two-stage crushing, SAG, pebble crusher, ball milling, and sulphide flotation circuit design. The current capacity supports 40,000 tonnes per day of ore processing. The 45ktpd Expansion that is currently underway will add a third ball mill in parallel with the two existing ball mills. The 65ktpd Expansion Plan includes the installation of a High Pressure Grinding Roll (HPGR) circuit, the addition of a fourth ball mill, a regrind verti-mill, additional rougher and cleaner flotation circuit capacity, and electrical system upgrades. The existing SAG mill will be retired. The fourth ball mill, a 22 ft by 38 ft mill, will be installed adjacent to the third ball mill within the existing building. With the addition of the fourth ball mill, the ball milling line will comprise four mills operating in parallel. Two identical 24 ft x 30 ft mills, and two identical 22 ft x 38 ft mills. (See Appendix 2 for the Proposed 65ktpd Process Flowsheet). This work will allow for increased throughput and a grind size P80 of 165 m. The 65ktpd Expansion Technical Report assumes construction to be completed at the end of 2023 for commissioning in the beginning of 2024. The 65ktpd Expansion is a planned plant-wide improvement that increases throughput in addition to: Reducing operating costs using newer but proven technologies and equipment; Reducing energy consumption through more efficient grinding unit operations; Improving flotation performance with substantially more capacity at the rougher and cleaner stages; and De-bottleneck concentrate dewatering, allowing for more flexibility at high tonnage during high head grade periods. The 65ktpd Expansion will not require any additional mining fleet, as the existing fleet already produces sufficient ore supply to feed the concentrator at the planned milling rates cash cost per pound of copper of $1.19 for the first ten years and $1.21 over the life of mine, net of by-product credits.