From its original home in the earth’s crust to its long life in a finished product, such as wire or pipe, copper passes through several stages.
During the last decade, more than 30 percent of annual copper use came from recycled sources. Based on the global copper stocks and flows model, recently developed by the Fraunhofer Institute, it is estimated that two thirds out of the 550 million tonnes of copper produced since 1900 are still in productive use (Glöser, 2013).
Primary copper production starts with the extraction of copper-bearing ores. There are two basic ways of copper mining: surface and underground mining. Due to copper being spread in relatively low concentrations over large areas, surface, or open-pit mining, is the predominant mining method for copper in the world.
Smelting & Refining
After mining, copper is produced by one of two process routes, pyrometallurgical (dry) or hydrometallurgical (wet). Smelting is a process of heating and melting ore to extract a metal like copper. Refining refers to any process that increases the grade or purity of the metal. After completing refining processes, copper cathode is generally 99.9 percent pure.
During semi-fabrication, copper, along with clean scrap, is converted into wire/rod, tubes, sheet and strips for use down the value chain.
Copper wire/rod, tubes, sheet, and strips are transformed into finished products that can be used directly by consumers and businesses.
Nearly 28 million tonnes of copper is used annually. The majority of copper produced worldwide (70 percent) is used for electrical/conductivity applications and communications.
The life of copper is infinite and does not have an end of life phase. It can be recycled over and over, with no loss of properties.