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A huayra furnace or huayrachinas is an Andean artisan furnace of Prehispanic design. Huayras were wind-driven and used to smelt copper. The furnance has the shape of a small turret with opening for wind to enter and drive the combustion. Molten metal collects at the bottom together with slag and for most purposes once separated from the slag it needs further processing to remove impurities.
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