What is cupola furnace?

Cupola Furnace

A cupola or cupola furnace is a melting device used in foundries that can be used to melt cast iron, ni-resist iron and some bronzes. The cupola can be made almost any practical size. The size of a cupola is expressed in diameters and can range from 1.5 to 13 feet (0.5 to 4.0 m). The overall shape is cylindrical and the equipment is arranged vertically, usually supported by four legs. The overall look is similar to a large smokestack.

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Science And Technology Of The Han Dynasty - Metallurgy - Furnaces and Smelting Techniques
... A blast furnace converts raw iron ore into pig iron, which can be remelted in a cupola furnace to produce cast iron ... BCE during the late Spring and Autumn Period, yet the oldest discovered blast furnaces date to the 3rd century BCE and the majority date to the period after Emperor Wu of Han (r ... Iron ore smelted in blast furnaces during the Han was rarely if ever cast directly into permanent molds instead, the pig iron scraps were remelted in the cupola furnace to make ...

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