Direct Reduced Iron
Direct-reduced iron (DRI), also called sponge iron, is produced from direct reduction of iron ore (in the form of lumps, pellets or fines) by a reducing gas produced from natural gas or coal. The reducing gas is a mixture majority of hydrogen (H2) and carbon monoxide (CO) which acts as reducing agent. This process of directly reducing the iron ore in solid form by reducing gases is called direct reduction.
The conventional route for making steel consists of sintering or pelletization plants, coke ovens, blast furnaces, and basic oxygen furnaces. Such plants require high capital expenses and raw materials of stringent specifications. Coking coal is needed to make a coke strong enough to support the burden in the blast furnace. Integrated steel plants of less than one million tons annual capacity are generally not economically viable. The coke ovens and sintering plants in an integrated steel plant are polluting and expensive units.
Read more about Direct Reduced Iron: Process, Problems, History, Uses
Famous quotes containing the words direct, reduced and/or iron:
“O wretched fool,
That lov’st to make thine honesty a vice!
O monstrous world! Take note, take note, O world,
To be direct and honest is not safe.”
—William Shakespeare (1564–1616)
“I’ve tried to reduce profanity but I reduced so much profanity when writing the book that I’m afraid not much could come out. Perhaps we will have to consider it simply as a profane book and hope that the next book will be less profane or perhaps more sacred.”
—Ernest Hemingway (1899–1961)
“Morality, a muzzle for the will; logic, a climbing iron for the mind.”
—Franz Grillparzer (1791–1872)