ArticleMaterials (Basel, Switzerland)2026
Electrochemical Pretreatment of Chrysocolla for Enhanced Sulfidization and Flotation: Mechanism and Process Optimization.
Article in Materials (Basel, Switzerland), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The flotation of oxidized copper minerals is limited by poor surface reactivity and the insufficient effectiveness of conventional sulfidization. This study investigated 50 Hz alternating current electrochemical pretreatment to enhance the sulfidization and flotation of chrysocolla and a natural oxidized copper ore. Operating parameters, including current density, treatment time, pulp pH, and sodium sulfide dosage, were optimized using a design of experiments approach. Phase transformations were characterized by scanning electron microscopy with energy-dispersive X-ray spectroscopy and X-ray diffraction. Pretreatment with 50 Hz alternating current promoted the surface formation of tenorite (CuO), which was subsequently transformed into covellite (CuS) during sulfidization, providing favorable conditions for subsequent flotation. The optimum conditions for chrysocolla were a current density of 100 A m
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