Copper Mining and Processing Processing Copper Ores Superfund
After the copper ore is crushed liquid is added to make it a slurry. The slurry is a mix of valuable copper ore minerals and "worthless" rock called gangue (pronounced "gang"). The slurry is placed in a tank and a process called froth floatation is used to separate the copper minerals from the gangue. Chemical reagents called "collectors" are added to the slurry and bind to the copper particles making them hydrophobic or waterproof.