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Leach Residue Flotation Process for Raw Copper Oxide Ore

     

Ammonia Leaching at Ambient Temperature and Pressure – Solvent Extraction – Electrowinning – Leach Residue Flotation Process for Raw Copper Oxide Ore

This process falls into the category of copper extraction processes from ores via hydrometallurgy and flotation, and is particularly applicable to copper recovery from low-grade raw copper oxide ore with high calcium and magnesium content.

This process adopts the low-cost ambient temperature and pressure ammonia leaching technology to dissolve copper oxide minerals in copper oxide ore. It combines the hydrometallurgical "ambient temperature and pressure ammonia leaching – solvent extraction – electrowinning" technology and flotation technology (a conventional mineral processing method) through optimized matching, and integrates them into a novel combined metallurgical-mineral processing flowsheet for treating high calcium-magnesium bearing copper oxide ore.

It abandons the high-temperature high-pressure or heated pressurized technologies that had to be employed in traditional ammonia leaching processes over the past decades to pursue high copper leaching rates. The process fully leverages the respective strengths of ammonia leaching for easy recovery of copper oxide minerals and flotation for easy recovery of copper sulfide minerals, reduces energy consumption and production cost, and features excellent operability and economic viability, making it easy to realize industrialization and large-scale production.

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