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Copper Sulfide Ore Flotation Process

     

The commonly used flotation processes for copper sulfide ores are as follows:

Priority Floatation (Enrichment Floatation):

Typically involves two stages: first, float out the copper, and then float out the sulfur. For compact, blende-like chalcopyrite ores where the amount of chalcopyrite is relatively high, this method generally employs a high-calcium alkali dosage (with calcium oxide content exceeding 600–800 g/m³) combined with a high dose of yellow alkali to suppress chalcopyrite and prevent its floatation.

Mixed-Subsequent Floatation:

Suitable for copper sulfide ores where sulfur is low and the copper minerals are readily floatable. The ore undergoes mixed flotation in mildly alkaline slurry, followed by separation flotation in highly alkaline slurry using lime to achieve a copper-lead-sulfur separation.

Modified Preferential Mixed-Subsequent Floatation:

Utilizes selective agents such as Z-200 or OSN-43 (or other similar collector reagents like ELC-105) for preferential floatation of copper ores, followed by subsequent mixed flotation to produce mixed copper-sulfide concentrates. These concentrates are then subjected to flotation with a copper depression reagent for further purification.

This method ensures high selectivity in copper recovery while minimizing sulfur and impurity contamination, making it highly efficient and widely applied in industrial operations.

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