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Copper from High-Grade Chalcocite

     

Method for Enhanced Extraction of Copper from High-Grade Chalcocite

The method for enhanced extraction of copper from high-grade chalcocite belongs to the field of hydrometallurgy of non-ferrous metals. The high-grade chalcocite ore is crushed and formed into heaps. After heap construction, circulating leaching operations are performed using bacteria-containing raffinate with high acid and high iron content. The leachate is periodically sampled to analyze copper concentration; when the copper concentration in the leachate exceeds 3.5 g/L, the leachate is extracted for solvent extraction, and the raffinate after extraction is returned for continuous leaching.

By combining biological heap leaching circulation with acid return from extraction, a leaching system with high acid and high iron content is established in the high-grade chalcocite heap leaching process. This enhances and accelerates the rapid leaching of chalcocite, thereby shortening the leaching cycle, enabling large-scale copper leaching, and improving the utilization rate of copper resources.

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