Copper than less-developed countries (30–40 kg per capita). The process of recycling copper is roughly the same as is used to extract copper but requires fewer steps. High-purity scrap copper is melted in a furnace and then reduced and cast into billets and ingots; lower-purity scrap is refined by electroplating in a bath of sulfuric acid. Numerous copper alloys have been formulated, many with important uses. Brass is an alloy of copper and zinc. Bronze usually refers to copper-tin alloys, but can refer to any alloy of copper such as aluminium bronze. Copper is one of the most important constituents of
Sundown Tin and Copper Mine have been mined after 1923. There is no reference to copper after this date either. The tin mine area consists of the open cut, with a grided shaft in its floor, and a collapsed adit at the base of its work face. Above the open cut is the main shaft, located on a bench cut into the hillside, with a mullock tip, tripod steel poppet head and older timber shaft- head staging, over a three-compartment shaft. The concrete pad supporting one of the poppet legs is inscribed with the names "T Fredrick, S. Lynn, F. Meehan, GRM Kane". Adjacent to