What is metallization in sponge iron?
Metallization is a measure of the conversion of iron oxides into metallic iron (either free or in combination with carbon as cementite) by removal of oxygen due to the action of the reductant used. Degree of metallization is the extent of conversion of iron oxide into metallic iron during reduction.
What is sponge iron process?
Overview. Sponge iron is formed through the reduction of iron ore to metallic iron through reaction with carbon in the form of coal, etc. at approx. 1100 degree Celsius. Sponge iron is also referred to as direct reduced iron, metalized iron, or hot briquetted iron.
How do you calculate metallization?
Metallization is usually expressed as a percentage: Fe Metallic/Fe Total x 100. For example, a DRI pellet that has 86 % Fe Metallic and 92 % Fe Total would have 93 % Metallization.
What is the chemical formula of sponge iron?
Acid gangue: SiO2 + Al2O3 + TiO2 + P2O5 + Cr2O3; basic gangue: CaO + MgO + Na2O + K2O. It is evident from this table that 4–8% of the DRI iron is nonmetallic, in the form of FeO.
What is metallization in DRI?
Metallization of DRI is a measure of the conversion of iron oxides into metallic iron (either free or in combination with carbon as cementite) by removal of oxygen due to the action of the reductant used. It is defined in percentage of the mass of metallic iron divided by the mass of total iron.
What is metallization rate?
Metallization is the percentage of metallic Fe out of the total iron content. The rate of metallization depends on the DRI process and how it is operated, typically the higher the metallization rate, the lower the production rate and higher the specific consumptions rates for natural gas and electrical power.
Why is it called sponge iron?
WHY IS IT CALLED SPONGE IRON? Iron oxide ores taken out from the Earth are allowed to absorb carbon by a reduction process. In this natural reduction, as the iron ore is warmed up with carbon, it results in a surface with hole marks, hence the name “Sponge Iron”.
What is sponge iron and its advantages?
Sponge Iron is a substitute for steel scrap for the manufacturing of steel through the EAF/IF courses. Sponge Iron acts as a superior feedstock for the electric furnaces used by various factories which allow the factories to use lower grades of scrap or to create higher grades of steel.
How do you calculate metallization in a sponge iron?
Degree of metallization of DRI is the extent of conversion of iron oxide into metallic iron during reduction. It is defined in percentage of the mass of metallic iron divided by the mass of total iron. As DRI is made by reducing gases, it has a porous, sponge like form.
What is sponge iron powder?
the sponge iron. Main material in powder metallurgy industry that consumes 60-80% of iron powder. Especially in magnetic materials. Welding Iron powder in the coating of welding electrode can significantly improve deposition efficiency.
What is spongelite iron?
Sponge iron is a metallic product produced through direct reduction of iron ore in the solid state. It is a substitute for scrap and is mainly used in making steel through the secondary route. The process of sponge iron making aims to remove the oxygen from iron ore.
What is the process of sponge iron?
Sponge iron Removing oxygen from the ore by a natural process produces a relatively small percentage of steels in the world. This process uses less energy and is a natural chemical reaction method. The process involves heating the naturally occurring iron oxide in the presence of carbon, which produces “ sponge iron.”
What determines the quality of sponge iron?
The quality of sponge iron is primarily ascertained by the percentage of metallization (removal of oxygen), which is the ratio of metallic iron to the total iron present in the product. Sponge iron manufacture is highly sensitive to raw material characteristics.
Which type of coal is used in sponge iron process?
A.I. & chemical properties like Fe (T), LOI, gangue content In Sponge Iron Process , two types of coal are being used such as feed coal and injection coal. Good flow ability in bins, pipes and conveyors for continuous and trouble free charging