Review Application of steel slags, ferronickel slags, and copper mining …
Most of the supply is still provided by the mining and refining of copper ore. Currently, the largest producers of copper are Chile, Poland, China, and the United States (Flanagan, 2022). Copper mining is a massive industry in the Southwest, with Arizona accounting for 60 - 70% of the total copper production in the United States (EPA, 1990).