This precious metal extraction equipment is specifically designed for the hydrometallurgical purification of rare metals such as Au, Ag, Pt, and Pd. The entire system features a closed-loop, corrosion-resistant, and modular structure, enabling it to operate stably over extended periods in highly corrosive media—including hydrochloric acid, nitric acid, and chloride salts.

For the core extraction unit, users may choose between multi-stage mixer-settlers or centrifugal extractor units. Mixer-settlers are ideal for high-flow, multi-stage counter-current extraction processes, offering high stage efficiency and operational flexibility. Centrifugal extractor units, conversely, utilize high-speed centrifugal force to achieve rapid two-phase separation; they are characterized by short residence times, minimal solvent entrainment, and a compact footprint. Users can make a flexible selection based on specific material properties and production capacity requirements.

All components in contact with the process fluids are constructed from acid-resistant, anti-corrosive materials, ensuring zero corrosion and leak-free operation within strong acid and chloride-rich environments. The equipment's structural design has been optimized to ensure excellent phase separation and resistance to emulsification, thereby effectively minimizing entrainment losses of the organic phase.

The complete system comprises extraction stages, scrubbing stages, stripping stages, organic phase storage tanks, preparation vessels, acid-resistant centrifugal pumps, flow meters, level gauges, temperature control modules, and a PLC-based automatic control system. The extraction stages facilitate the selective transfer of precious metal ions from the aqueous phase to the organic phase; the scrubbing stages remove co-extracted impurity ions; and the stripping stages extract the target metals back from the loaded organic phase into the aqueous phase, yielding a high-purity precious metal solution. The organic phase subsequently enters a regeneration cycle before being returned to the extraction stages for reuse.

The system is compatible with a wide range of common extraction systems—including TBP, N235, and quaternary ammonium salts—enabling the highly efficient separation of precious metal ions (such as Au, Pt, and Pd) from impurity ions (such as Cu, iron, and nickel). The PLC system provides real-time monitoring and control of critical process parameters—including flow rates, liquid levels, and temperatures—facilitating fully continuous and automated operation across the entire extraction-scrubbing-stripping-solvent regeneration workflow. This process delivers ultra-high-purity precious metal solutions, serving as a premium feedstock for subsequent electrolytic refining or chemical reduction processes.