Blister copper ingots are semi-refined copper products obtained directly from the smelting of copper concentrates. They typically contain 70%–90% copper and are characterized by a rough, blistered surface caused by escaping gases during solidification. These ingots serve as an intermediate raw material for further refining into high-purity electrolytic copper. Key Properties – Copper content: 75% – 90% – Distinct blistered / porous surface texture – High thermal and electrical conductivity (pre-refined stage) – Suitable for further refining processes – Economical compared to refined copper Applications Refining Industry Used as feedstock for electrolytic refining to produce high-purity copper cathodes Alloy Manufacturing Used in the production of brass, bronze, and other copper alloys Metal Processing Further processed into rods, wires, and sheets after refining Standard Specifications Parameter Value – Purity: 75%-90% Cu – Weight: 25 – 50kg ingot – Shape: Rectangular irregular – Type: Blister(semi-refined) – HS Code:7403