| Company | Twin Metals Minnesota |
| Date | 2014 |
| Region | Ely, Minnesota, USA |
| Commodities | Copper, Nickel, Gold, Platinum, Palladium, Silver |
| Mine Type | Underground |
| Throughput | 50,000 st/day |
| Mine Life | 30 years |
| Status | Development |
Executive Summary
The Twin Metals Minnesota Project is a pre-feasibility study for a copper-nickel sulphide mine located in Ely, Minnesota. The proposed operation utilizes an underground mining method to extract ore from the Maturi deposit. The processing plant is designed for a throughput of 50,000 short tons per day, with a mine life of 30 years. The primary commodities are copper and nickel, with significant by-product recovery of gold, platinum, palladium, and silver.
The metallurgical process involves a sequential flotation circuit to produce separate copper and nickel concentrates. Primary crushing is achieved via a gyratory crusher, followed by grinding in a SAG mill and ball mill circuit. The flotation circuit utilizes tank cells for roughing and cleaning, with column flotation cells employed for the final copper cleaning stage to enhance nickel rejection. Thickening and filtration facilities are designed to produce dry concentrates for rail load-out.
Website: https://www.twin-metals.com/meet-twin-metals/about-the-project/
Report Date: 2014
Region: Ely, Minnesota, USA
Project Status: Development
Commodity: Copper, Nickel, Gold, Platinum, Palladium, Silver
Throughput: 50,000 st/day
Mine Life: 30 years
Mine Type: Underground
Ore type: Sulphide
