What furnace is used to produce cast iron?

A cupola furnace is commonly used to produce cast iron. This cylindrical furnace operates by charging layers of metal, coke, and flux, which are ignited to melt the iron as it descends through the layers. The cupola allows for continuous operation and can recycle scrap iron, making it an efficient choice for cast iron production. Other types of furnaces, such as electric arc furnaces, can also be used but are less traditional for cast iron specifically.