Abstract: To determine the rational process flowsheet plan for its new 7 000 t/d concentrator, a gold-copper mine conducted a research to optimize its original 900 t/d concentrator's process flowsheet.The result shows that it is better to eliminate the original ore-washing operation; to simplify the original multi-stage grinding-flotation process into one stage grinding-flotation; to use a composite collector to improve the flotation recovery; and to replace the single gravity separation for the retreatment of flotation tailings by gravity separation-regrinding-flotation process or by gravity separation-regrinding-cyanide leaching process. Gold-copper ore, Optimization of beneficiation process|Grinding-flotation process|Composite

Key words: collector, Retreatment of flotation tailings