Copper Cathode 99.99% (LME Grade A) represents the purest commercially traded form of copper used across power generation, electrical transmission, cable production, and alloy manufacturing. Refined through advanced electrolytic or SX-EW processes, cathodes from the Middle East conform to ASTM B115 and LME Grade A specifications.
Basekim is a trusted supplier that provides high-quality copper cathode at competitive global prices.
1. Definition and Industrial Importance
Copper cathode are rectangular plates of electro-refined copper containing ≥ 99.99% Cu, used as feedstock for wire rod, strip, sheet, tube, and alloy production. Their exceptional conductivity and low impurity level make them the backbone of modern electrical and mechanical industries.
2. Production Processes
2.1 Smelting and Electrorefining
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Copper concentrates are smelted to produce Blister Copper (~99%).
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The blister is cast into anodes and refined electrolytically in a CuSO₄ + H₂SO₄ solution.
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Copper ions migrate to stainless-steel cathode plates, producing 99.99% Cu sheets.
Advantages: excellent control of Se, Te, As, Sb, and Bi impurities; consistent crystal growth; high conductivity.
2.2 SX-EW (Solvent Extraction & Electrowinning)
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Leaching of oxidized ore forms a pregnant leach solution (PLS).
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Copper is selectively extracted into an organic phase, stripped, and electrowon onto cathodes.
Advantages: lower carbon footprint, stable quality, no smelting step required.
3. Key Technical Parameters
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Purity: ≥ 99.99 % Cu (oxygen-controlled)
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Electrical Conductivity: ≥ 101 % IACS after remelting
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Impurities: ppm-level elements — S, O, Se, Te, As, Sb, Bi, Fe, Ni
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Surface Quality: uniform thickness and smooth, crack-free finish
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Stack Integrity: palletized bundles of ~1 MT secured by metal or poly straps
4. Packaging and Logistics
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Cathode Size: approx. 914 × 914 × 12 mm
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Bundle Weight: ~1 MT per pallet
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Container Load: 20 FT holds 20–22 MT (20–22 pallets)
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Shipping Terms: FOB Middle East / CFR / CIF worldwide
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Documents: Commercial Invoice, Packing List, Bill of Lading, COA, COO, and Inspection Certificate (SGS or equivalent)
5. Quality Assurance and Compliance
Every batch is tested for chemical composition, mechanical integrity, and visual uniformity.
Conforms to: ASTM B115, EN 1978, and LME Grade A specifications.
Third-party inspection by SGS, Bureau Veritas, or Intertek can be arranged before shipment.
Traceability is ensured through batch/heat number identification on each pallet.
6. Applications
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Wire and Cable Manufacturing: high-conductivity feedstock for electrical conductors.
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Busbars & Transformers: low resistivity for efficient power distribution.
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Tubes and Plates: used in HVAC and heat exchangers.
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Alloy Production: primary input for brass and bronze industries.
7. Pricing and Market Dynamics
Copper cathode prices are linked to the London Metal Exchange (LME) daily cash and 3-month rates plus regional premiums.
Typical market range in recent quarters: USD 8,000 – 10,000 / MT.
Drivers include LME/SHFE stocks, energy costs, TC/RC charges, and mining supply disruptions.
Long-term contracts often use floating formulas to mitigate price volatility.
8. Procurement Checklist
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Confirm COA with traceable batch number
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Define Incoterms and destination port
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Verify packing dimensions and net weight
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Plan lead time (2–4 weeks) for production and shipment
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Ensure inspection and insurance clauses in the sales agreement
FAQ — Real Questions from Industry Buyers
1. What does “LME Grade A” mean?
It refers to copper cathode meeting the London Metal Exchange specification of ≥ 99.99% Cu purity with tight impurity limits, guaranteeing acceptance in global warehouses.
2. Is SX-EW cathode different from electro-refined copper cathode?
Both reach 99.99% purity; SX-EW typically has lower oxygen and is preferred for high-ductility wire applications.
3. How many tons fit in a 20-ft container?
Usually 20 to 22 tons (20–22 pallets of ~1 MT each), subject to gross-weight limits per shipping line.
4. Which parameters matter most for wire manufacturers?
Conductivity (IACS %), oxygen control, low ppm impurities, and uniform surface thickness directly affect drawing and annealing quality.
5. Can third-party inspection be performed before loading?
Yes, independent inspection by SGS, Intertek, or BV is available on request.
6. How is the price quoted?
Typically LME + regional premium, adjusted for brand and logistics factors.
