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The scrap gold is then sold by brokers to smelters or refiners, who heat the gold to at least 1,064 °C (1,947 °F), its melting point. [10] This may include gold from numerous sources, including recycled and newly mined gold.
Electric phosphate smelting furnace in a TVA chemical plant (1942) Smelting is a process of applying heat and a chemical reducing agent to an ore to extract a desired base metal product. [1] It is a form of extractive metallurgy that is used to obtain many metals such as iron, copper, silver, tin, lead and zinc.
Medieval smelting plant. Cupellation was also being used in parts of Europe to extract gold, silver, zinc, and tin by the late ninth to tenth century AD. Here, one of the earliest examples of an integrated unit process for extracting more than one precious metal was first introduced by Theophilus around the twelfth century.
Cash for Gold USA, an established gold buyer, is a top choice for selling your gold items. They offer competitive rates for a wide range of gold items, including jewelry, scrap gold and gold coins.
Gold occurs principally as a native metal, i.e., gold itself.Sometimes it is alloyed to a greater or lesser extent with silver, which is called electrum.Native gold can occur as sizeable nuggets, as fine grains or flakes in alluvial deposits, or as grains or microscopic particles (known as colour) embedded in rock minerals.
The Harjavalta copper smelter, located on the west coast of Finland, produces copper cathodes that are mainly sold to manufacturers of semi-finished goods. Other important products include gold, silver and sulphuric acid. The Bergsöe lead smelter outside Landskrona in southern Sweden extracts lead from scrap car batteries.
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