The Three Main Raw Materials of Electrolytic Copper Foil
The creation of electrolytic copper foil is like cooking a high-tech dish, requiring the careful selection of three main ingredients:
Electrolytic Copper: Cathode copper with a purity of 99.95% or higher is the basic raw material, equivalent to the main dish.
Sulfuric Acid Solution: An electrolyte with a concentration of 150-300 g/L, playing the role of conducting force.
Additives: Trace amounts of gelatin, thiourea, and other organic substances act like seasonings, improving the ductility of the copper foil.
The Magnificent Transformation of Copper Granules from Telecommunication Cables
Copper granules from discarded telecommunication cables can also be given a new lease on life:
Deep Purification: Removing plastic through smelting. Residual copper purity increased to 99.9%
Electrolytic refining: Re-electrolysis in copper sulfate solution to obtain copper ions meeting requirements
Foil forming: Depositing 8-70 micrometer-thick copper foil on a titanium roller cathode, thinner than A4 paper
The win-win code of the circular economy
This waste-to-treasure process holds two surprises:
Cost advantage: Recycled copper raw materials are 20%-30% cheaper than virgin copper
Environmental characteristics: Each ton of recycled copper can save 1.5 tons of mining, reducing energy consumption by 80%
Performance: The conductivity of specially treated recycled copper foil can reach over 98% of that of pure copper.
