Is pig iron smelted in a graphite crucible?
The ironmaking raw materials with iron ore (Fe2O3), smelting iron ore, coke (fuel), limestone (solvent) and charge together into the blast furnace, under certain temperature and pressure, through a series of chemical reactions, the reduction of iron ore.
In charge of limestone (CaO) from slagging, fluxing action, it can reduce the melting temperature of iron ore, iron and other elements also formed slag react, covering on the surface of the molten iron, molten iron and insulation protection.After the pig iron smelting, made pig iron ingot, sold to the market. According to the application of ingot has two kinds: cast iron and steel and iron.Casting pig iron: the fracture surface is dark grey, and the mass fraction of silicon is high. It is mainly used in the production of cast iron parts.Steel pig iron: the fracture surface is bright white, and the mass fraction of silicon is low. It is mainly used in the steelmaking process.
The iron obtained directly from ore smelting is called pig iron. As the iron ore, coke, limestone and so on are mixed together, the molten iron is in direct contact with coke, slag, etc., and carbon, sulfur and other elements in the coke will seep into the molten iron. At the same time, the chemical gas in the furnace gas will react with the iron, and the products will also be mixed into the molten iron. Therefore, the impurity content in pig iron is higher, and the main impurities are five basic elements, such as carbon, silicon, manganese, sulfur and phosphorus, as well as some non-metallic inclusions.
No, is cast iron and cast iron crucible for melting, Aluminum Alloy, zinc alloy, lead alloy, tin antimony alloy, alloy and other metal appliances, more durable than iron crucible.
