What is sponge iron meaning?
Definition of sponge iron : iron in porous form or containing many voids specifically : crude iron made by subjecting the oxide ore to a reducing gas without melting.
What is sponge iron and where it is used?
Sponge iron is also referred to as direct reduced iron, metalized iron, or hot briquetted iron. Sponge iron is used in the iron and steel industry as a substitute for scrap in induction and electrical arc furnaces.
What is the difference between iron and sponge iron?
Iron Ore Pellet is used for reduction. After reduction of iron ore pellet the product resembles sponge because of pores left behind after removal of oxygen. As such it is called Sponge Iron. Sponge Iron is a substitute of scrap in steel melting.
What is scrap and sponge iron?
In an electric furnace, scrap iron is used and occasionally also sponge iron. Sponge is an intermediate product, which is produced from iron ore by means of direct reduction (= DRI or directly reduced iron) and that is then further reduced and smelted in an electric furnace.
What is pig iron and sponge iron?
Sponge iron is a form of iron that we can produce directly from iron ore through a reduction process whereas pig iron is a form of iron that we can produce by melting iron ore along with charcoal and limestone under very high pressure.
What is sponge iron Class 10?
Answer. 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 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.
Which is better sponge iron or pig iron?
Sponge iron is superior to pig iron as it is richer in iron content. Because of this property, it has many uses in electric furnaces. We can mix sponge iron, in its powdered form with many other metals to manufacture a variety of iron-containing products. For instance, we can produce wrought iron from sponge iron.
How many types of sponge iron are there?
Sponge Iron / DRI Direct reduction processes can be divided roughly into two categories: gas-based, and coal-based.
What is Sponge steel?
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 yield in sponge iron?
In 100 parts Fe will be = 65 X 100 / 71.06 = 91.47% Fe(T) in Sponge 91.47% This implies that in 100Kg ore Sponge recovery = 71Kg Or 71 Kg Sponge comes from = 100Kg Ore 1000 Kg Sponge comes from = 100 x 1000 / 71 = 1405 Kg Ore If we will consider 5% losses (Back Spillage wet scrapper + ESP) It will be 1405 / 0.95 = 1480 …
Is sponge iron and pig iron is same?
What is C Fe ratio in sponge iron?
The C/Fe ratio is around 0.42-0.44. Coal up to 30% ash content is successfully used.
What is DRI process?
Solid sponge iron ( direct reduced iron or DRI) is produced by removing oxygen from the ore . The technique of Direct reduction varies according to the type of reducing agents employed and the metallurgical vessel in which they are reduced. The reducing agents used normally are : Gas reduction.
What is metallization in sponge iron?
The process of sponge iron making aims to remove the oxygen from iron ore. 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.
What is DRI metal?
Introduction. Direct Reduced Iron (DRI) is the second most viable source of virgin iron used in steelmaking after pig iron or hot metal produced in blast furnaces. DRI is produced by direct reduction of iron ore using carbon monoxide and hydrogen.
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 DRI called sponge iron?
In this natural reduction reaction, as the iron ore is heated with carbon, it results in a pop-marked surface, hence the name “sponge iron.” The commercial process is a solid solution reduction, also called direct-reduced iron (DRI).