Cast iron material is a group of carbon alloys containing 2 to 4% carbon and varying amounts of silica and manganese. It also contains impurities such as phosphorus & sulfur. It is produced by reducing iron ore in blast furnaces, and its primary material is cast iron produced from molten iron ore in the furnace. These irons are made directly from molten pig iron or by smelting pig iron, often with a substantial amount of iron, limestone, steel, or coke.
It can be melted in a special type of blast furnace called a cupola but is most often melted in an electric induction furnace or an electric arc furnace. As mentioned earlier, cast iron is made from pig iron, limestone, and coke. This manufacturing process takes place by melting those three ingredients in a cupola furnace. The cupola furnace is more or less similar to the blast furnace.