Introduction
Iron is a very useful material because of its high strength, low cost and excellent heat transfer properties. However, iron is also susceptible to corrosion and other problems caused by oxygen and other elements that are typically present in the environment. One of the most effective ways to overcome these problems is to add graphite to the molten iron, creating a graphite floating effect that helps to retain important elements, such as phosphorus and sulfur, in the metal.
Background
The process of graphite floatation is most commonly used in the production of ductile iron, a form of cast iron that has been treated with graphite in order to increase its strength, ductility and toughness. When graphite is added to molten iron, it creates a floating layer on the surface that helps to reduce the amount of oxidation that can occur. This is because the oxygen and other elements present in the molten iron have a lower affinity for the graphite layer, meaning that they can more easily escape the molten metal and do not remain as part of the final product.
The addition of graphite also helps to reduce the amount of phosphorus and sulfur present in the metal, as it helps to draw these elements out of the molten iron. This is why the process of graphite floatation is so important in the production of ductile iron, as it helps to ensure that the final product has the necessary properties and strength required for its intended application.
Benefits and Advantages
Graphite floatation helps to improve the quality of cast iron in a number of different ways. Firstly, it improves the surface finish of the product by removing any impurities or unwanted elements that may remain in the metal. Additionally, since the element phosphorus is particularly damaging to the strength and durability of cast iron, the process of graphite floatation helps to reduce its presence in the metal, making the final product stronger and more resistant to wear and tear.
Conclusion
In conclusion, graphite floatation is a process that is very important in the production of ductile iron and other forms of cast iron. By helping to improve the quality of the product, graphite floatation ensures that these metals are of the highest quality possible and are suitable for a variety of different applications.
