Precious Metal Refining Plant

The Global Antico Precious Metal Refining Plant is a fully integrated hydrometallurgical processing system for the refining of gold, silver, platinum group metals (PGM — platinum, palladium, rhodium, iridium, ruthenium), and associated precious metal alloys from a wide range of feed materials including jewellery scrap, electronic waste, spent catalysts, dental alloys, and mining concentrates. The plant combines chemical dissolution, selective precipitation, solvent extraction, and electrorefining technologies into a sequential refining flowsheet engineered for maximum metal recovery with minimum process reagent consumption. For gold refining, the primary route is aqua regia dissolution (HNO₃ + HCl), followed by selective precipitation as AuCl₃ using sodium metabisulphite, filtration, and smelting to produce 999.9 fine gold.

Silver refining is achieved via electrolytic Möbius or Balbach-Thum cell systems producing silver of 999.0+ fineness. For PGM-bearing materials, selective dissolution and solvent extraction or selective precipitation sequences separate platinum, palladium, rhodium, and other PGMs into individual pure fractions. Fume management is a critical safety engineering feature — dedicated HNO₃ and HCl acid fume scrubbers, NOx abatement columns, and enclosed vessel designs prevent personnel exposure and atmospheric emissions. A precious metal accounting system incorporating process weighing, sampling, and assay management provides full batch traceability and metal yield reporting essential for high-value material accountability. The plant is modular in design, scalable from 5 kg/day to 500+ kg/day precious metal throughput.