Silver Dore Bars

1. Product Overview

Silver Dore Bars are semi-pure alloyed silver bars, typically cast directly from ore processing or recycling streams, serving as the critical raw material for secondary refining into investment-grade silver. Their primary industrial use is as high-yield feedstock for silver refiners, electronics component manufacturers, and jewelry production. The key value proposition lies in offering a cost-efficient, high-mass silver source with verifiable weight and assay, reducing refining loss compared to lower-grade concentrates. Strategically, securing a reliable Silver Dore supply buffers large-scale buyers against spot market price spikes and concentrate shortages.

2. Key Specifications & Technical Characteristics

• Chemical composition: Silver (Ag): 85%–99.5% typical; base metals: Copper, gold, lead (trace)

• Purity level: Industrial grade – minimum 85% Ag, maximum 0.5% deleterious elements (As, Bi, Sb)

• Physical characteristics: Cast trapezoidal or rectangular bars; metallic silver-gray surface; approx. density 10–10.5 g/cm³; typical weight 5 kg–20 kg per bar

• Packaging options: Steel-banded wooden pallet crates (1 MT per crate), moisture-barrier shrink-wrapped, or customer-specified export cartons

• Shelf life: Indefinite under dry, non-corrosive storage (no oxidation degradation vs. fine silver powder)

3. Core Industrial Applications

• Primary industries: Precious metal refineries, semiconductor fabrication, photovoltaic silver paste producers, and industrial catalyst manufacturing

• Operational use cases: Direct feed into electrolytic refining cells; alloying for brazing preforms; conductive layer deposition in high-voltage switchgear

• Why better than alternatives: Lower melting energy required vs. silver concentrate; minimal slag formation vs. scrap of unknown origin; consistent Ag/Au ratio allows predictable recovery modeling, cutting downstream assay costs by 12–15%

• Efficiency advantage: 98.5%+ first-pass recovery in standard nitric acid leaching, reducing refining cycle time by 2 days per batch

4. Competitive Advantages

• Quality consistency: Every bar lot tested via XRF and fire assay; certificate of analysis included; inter-lot Ag variance <0.3%

• Supply reliability: Backed by LME-approved warehousing and multi-continent blending facilities; 98% on-time in-full delivery record

• Logistics capability: Insured door-to-door shipping with conflict-free supply chain documentation (OECD-compliant)

• Price competitiveness: Priced at LME Silver fix minus competitive treatment/refining charges with floating or fixed options

• Technical support: Origin-to-refinery traceability reports and custom lot segregation available for ISO 9001/14001 buyers

5. Commercial & Supply Information

• Minimum order quantity (MOQ): Bulk 20 metric tons

• Loading capacity: 22 metric tons per 20-foot dry container (max 24 MT with reinforced pallets)