Copper is produced in the U. S. primarily by pyrometallurgical smelting methods. Pyrometallurgical techniques use heat to separate copper from copper sulfide ore concentrates. Process steps include mining, concentration, roasting, smelting, converting, and finally fire and electrolytic refining. Process Description24
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Get PriceCopper was the first metal to be used to make weapons and tools. Mining and smelting skills spread from Asia Minor to Central Europe 4000 years BC. Around 3000 BC, highranking men owned a copper axe, which was often buried with them. A copper axe was used not only for woodworking and felling trees but was also a powerful closecombat weapon.
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Get PriceThe mining sector accounts for approximately 10% of Chile's GDP, which in 2017 was approximately 270 billion. Copper alone represents about 50% of Chile's total exports, and the industry also demands imports for key inputs for copper extraction, such as fuel, heavy equipment, and various technologies used in the mining process.
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