Blister Copper / Anode Copper

Description

1. Product Overview
Blister Copper (typically 98.5–99.5% Cu) is an intermediate product in copper pyrometallurgy, formed after smelting and converting, which requires further refining into anode copper (99.5–99.9% Cu) for electrolysis. Its primary industrial use is as the feedstock for high-purity copper cathode production in electrorefining plants. The key value proposition is its optimal balance between lower production cost versus concentrate and superior electrorefining efficiency versus lower-grade matte. Strategically, it is critical for securing mid-stream copper supply, reducing refinery energy consumption by 12–15%, and enabling trace impurity management for premium cathode output.

2. Key Specifications & Technical Characteristics

• Chemical Composition (Blister Copper):

  • Cu: 98.5% – 99.5%

  • Fe: ≤ 0.05%

  • S: ≤ 0.03%

  • Pb, As, Sb, Bi, Ni: tightly controlled per refinery tolerance

• Anode Copper (after fire-refining):

  • Cu: 99.5% – 99.9%

  • Oxygen: 0.1% – 0.2% (controlled for casting)

  • Impurities: ≤ 0.5% total

• Physical Characteristics:

  • Form: Cast flat anodes (standard size: 950x950x35 mm or custom) or irregular blister slabs/plates

  • Color: Metallic reddish-grey, oxidized surface

  • Density: ~8.3 – 8.9 g/cm³

  • Weight per anode: 100 – 380 kg (customizable)

• Packaging Options:

  • Bundled steel strapping, bare on flat-rack containers

  • Tear-resistant polyethylene sleeve for oxidation control (on request)

  • Paper weight certificates and lot-specific assay reports included

• Shelf Life: Indefinite when stored in dry, non-corrosive environment (surface oxidation does not affect refining yield)

3. Core Industrial Applications

• Primary industries: Copper refineries, wire rod mills, specialty alloy producers, and E-waste recycling integration facilities.

• Specific use cases:

  • Electrorefining to produce LME Grade A copper cathodes (99.99% Cu)

  • Feedstock for continuous copper rod casting lines

  • Alloying base for brass, bronze, and copper-nickel products

• Performance vs. alternatives:

  • Compared to copper concentrate: 40–50% lower shipping cost per Cu unit; faster smelter throughput.

  • Compared to scrap copper: Consistent impurity profile enables predictable refinery passivation cycles and higher current efficiency (94–96% vs. 88–92%).

  • Lower arsenic/antimony content reduces electrolyte purification frequency by 20%, cutting operating expenditure.

4. Competitive Advantages

• Quality consistency: Every lot certified via XRF and ICP-OES; impurity deltas < 0.02% between shipments.

• Supply reliability: Long-term offtake agreements with integrated mines; 99.2% on-time delivery rate over 24 months.

• Logistics capability: Dedicated break-bulk, flat-rack, and containerized shipping with port-side assay verification.

• Price competitiveness: Pricing linked to LME Copper minus fixed treatment & refining charges (TC/RC) – no hidden premiums.

• Sustainability: Sourced from ISO 14001-certified smelters; 85% of energy from hydro or natural gas; lower carbon footprint than secondary copper from scrap remelting.

• Technical support: Full refinery optimization modelling provided – including electrolyte balance and anode passivation risk assessment.

5. Commercial & Supply Information

• Minimum Order Quantity (MOQ): 20 metric tons (MT) – one loose container load

• Bulk purchase option: 500 MT monthly minimum for long-term contracts (12+ months)

• Loading capacity per 20ft container: 20 – 22 MT (depending on anode stacking pattern)

• Loading capacity per 40ft flat-rack container: 40 – 44 MT

• Incoterms: FOB loading port (Chile, Peru, DRC, Zambia) or CIF named global refinery port

• Lead time: 15–25 days from L/C or advance payment confirmation