Copper Mining and Processing
Copper, gold, silver, lead, zinc, iron, mercury, manganese, uranium, and tungsten ... Produced 134 million pounds of copper concentrate. Paid $6.6 million in state royalties and $2.5 million in tribal royalties. ... Crushed ore is further processed at a mill to fine sand. Liquid is added to make a slurry (copper ore and gangue) ...
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