1. Production process

Raw material preparation

The main raw materials include high-purity electrolytic copper (purity ≥ 99.90%), zinc ingots, scrap copper (such as brass scraps, copper), etc. Some processes will add slag removers (such as slag removers) to remove impurities.

The raw materials are matched in proportion, for example, copper, zinc ingots, and copper bran are put into the furnace in order.

Melting and forming

Melting: Use a medium frequency electric furnace or an industrial frequency furnace to heat to about 1100℃ to melt the raw materials into a liquid metal solution. The melting process produces smoke and slag, which need to be treated by environmental protection measures such as bag dust removal.

Continuous casting and extrusion: After the molten copper liquid is kept warm, it is pulled into shape by a continuous casting machine, or a hot extrusion process is used (such as the production of continuous casting rods and extruded rods).

Cold processing: including drawing, straightening, cutting and other steps to refine the surface finish and adjust the size.

Post-processing

Annealing: Some processes require annealing (400~700℃) to restore the plasticity of the material.

Surface treatment: chemical passivation, electroplating or coating processes are used to enhance corrosion resistance.

Quality control

Through precision casting, drawing, straightening and other processes, the internal structure of the copper rod is fine, oxygen-free and highly conductive, and the oxygen content is strictly controlled at ≤0.04%.

2. Product Advantages

Excellent physical properties

Electrical conductivity: electrical conductivity ≥100% IACS (International Annealed Copper Standard), resistivity is only 0.0172 Ω·m, it is an ideal material for power transmission and electronic devices.

Thermal conductivity: thermal conductivity reaches 385~401 W/(m·K), suitable for heat exchangers, radiators and other scenes that require rapid heat transfer.

Excellent mechanical properties

Strength and ductility: tensile strength 200~360 MPa, elongation up to 55%, both high strength and good plasticity, suitable for cold/hot processing (such as stamping, drawing).

Corrosion resistance: strong corrosion resistance in atmospheric and freshwater environments, but surface protection is required in sulfur or halogen environments.

Processing and environmental advantages

Easy to process: can be cut, welded, polished, plastic recovery is fast after annealing, and supports complex molding processes.

Recyclability: production waste (such as scraps) can be recycled, in line with the requirements of the circular economy.

Lead-free and environmentally friendly: Some processes achieve lead-free production and meet environmental standards by improving deoxidation technology.

Widely used

Electrical and electronic: used for wires, cables, busbars, conductive layers of circuit boards, etc.

Thermal management: condensers, radiators, air conditioning copper pipes, etc.

Construction and industry: roof waterproofing boards, valves, pipes, mechanical parts.