DONGSHENG Metal Raises the Technical Bar for Global Precious Metal Recycling
Hong Kong S.A.R., 15th Aug 2025 – Hong Kong Dongsheng Metal Trading Co., Ltd. (DONGSHENG) announced new technical benchmarks in sampling, assaying, and closed-loop refining that respond to what precious metal recycling companies identified across 2025 trade papers and conference proceedings: tighter ESG audits, faster settlement cycles, and higher accountability from feedstock intake to final bullion or salt.
Scope and capabilities
DONGSHENG integrates service, manufacturing, and trade across high-value streams: germanium, ruthenium, rhodium, palladium, iridium, platinum, gold, and silver. The company also runs specialized programs for titanium anodes, titanium electrodes, MMO/DSA anodes, nickel mesh and nickel scrap, iridium wire, titanium scrap, printed circuit boards (PCBs), cemented carbides, catalytic converters, precious metal catalysts, and iridium spark plugs. This portfolio matches the diversified intake trend reported by precious metal recycling companies and reduces single-metal price risk.
Registered office: Room 2120, New Technology Plaza, No. 34 Dayou Street, San Po Kong, Kowloon, Hong Kong.
Intake, sampling, and settlement
Intake controls. Barcode tracking per lot, sealed drums, and photo logs on receipt. Chain-of-custody mirrors the best practices published by precious metal recycling companies.
Sampling. Multi-increment riffle or rotary splitting for solids; coning-and-quartering for heterogeneous e-scrap; pressurized filtration for liquid catalysts. Variograms are recorded to prove sampling representativeness—an area where precious metal recycling companies saw the most dispute reduction in 2025.
Assay. ICP-OES/ICP-MS for PGMs and base metals; fire assay with nickel-sulfur collectors for Au/Pt/Pd; XRF for screening; GD-MS for iridium-rich alloys. Cross-lab round-robins mirror what precious metal recycling companies recommend to cut bias.
Financials. Lot-based provisional credits within agreed payable matrices; metal-accounting reconciliation upon final assays; optional Loco London hedging. These terms align with settlement frameworks that precious metal recycling companies documented this year.
Process routes
Autocatalyst & catalyst refining. Chloride leach with oxidants, then solvent extraction/ion exchange to separate Pt, Pd, Rh; selective precipitation to hydroxides or ammonium salts; calcination to sponge/powders. Flowsheet choices reflect what precious metal recycling companies benchmarked for higher Rh recoveries.
Electronics & PCBs. Mechanical liberation, density/eddy-current separation, followed by cyanide-free gold lixiviants and sulfite-based silver leach. Copper is recovered electrolytically; precious-metal residues head to fire-refining—an approach favored by precious metal recycling companies to minimize reagent load.
Refractory iridium and iridium-platinum alloys. High-temperature oxidative pre-treatments with halide assistance, then molten-salt or chloride systems. Documentation from precious metal recycling companies shows these sequences materially improve Ir yield and purity.
Environmental and safety controls
Water & air. Counter-current rinsing, membrane concentration, and metal-salt crystallization; scrubbers sized for chlorine/chloride systems. Emission and effluent data are logged per batch, reflecting disclosure templates circulated among precious metal recycling companies.
Residues. Sulfate and chloride brines are treated for metal take-back; gypsum or jarosite routes used only with full leachate detox proof. Hazard registers follow the incident-prevention checklists many precious metal recycling companies adopted in 2025.
ESG & traceability. Lot-level provenance declarations compatible with OEM take-back programs and extended producer responsibility rules referenced by precious metal recycling companies worldwide.
Media Contact
Organization: Hong Kong Dongsheng Metal Trading Co., Ltd
Contact Person: DONGSHENG
Website: https://www.dongshengjs.com/
Email: Send Email
Country: Hong Kong S.A.R.
Release Id: 15082532416