Importance of oxidation during regrinding of rougher flotation concentrates with a high content of sulfides

摘要: The objective of this study is to understand the flotation behavior copper and gold minerals after regrinding rougher concentrate with a high pyrite content. It was found that low Eh dissolved oxygen (DO) were produced due quick consumption by large amount fresh surfaces created, resulting in poor their selectivity against pyrite. A number methods used provide an oxidizing condition, including pre-aeration before flotation, addition different agents during regrinding. all improved gold, however, effectiveness these varied from case case. This demonstrates importance oxidation or for concentrates sulfide contents.