Direct Reduced Iron: Difference between revisions
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'''Direct-reduced iron (DRI)''' is produced by the use of a reducing gas (often a mixture of hydrogen and carbon monoxide) | '''Direct-reduced iron (DRI)''' is a metallic material of a manufacturing process formed by the reduction (removal of oxygen) of iron oxide (iron ore) at temperatures below the fusion point of iron. DRI is produced by the use of a reducing gas (often a mixture of hydrogen and carbon monoxide). The temperatures for this process are significantly lower than those in a blast furnace, and capital requirements are fewer. DRI may have a sponge-like structure, leading to the alternative name “sponge iron”. Suitable starting materials are very high-grade iron ores (70% and up) or rusted scrap steel, which could not be used in an induction furnace. | ||
HDRI ('''hot''' direct reduced iron): moving the still-hot iron immediately into an electric arc furnace or [[Induction_Furnace]], to save energy. | HDRI ('''hot''' direct reduced iron): moving the still-hot iron immediately into an electric arc furnace or [[Induction_Furnace]], to save energy. | ||
Revision as of 04:50, 9 August 2010
Direct-reduced iron (DRI) is a metallic material of a manufacturing process formed by the reduction (removal of oxygen) of iron oxide (iron ore) at temperatures below the fusion point of iron. DRI is produced by the use of a reducing gas (often a mixture of hydrogen and carbon monoxide). The temperatures for this process are significantly lower than those in a blast furnace, and capital requirements are fewer. DRI may have a sponge-like structure, leading to the alternative name “sponge iron”. Suitable starting materials are very high-grade iron ores (70% and up) or rusted scrap steel, which could not be used in an induction furnace.
HDRI (hot direct reduced iron): moving the still-hot iron immediately into an electric arc furnace or Induction_Furnace, to save energy.
Product ecology
Induction_Furnace - for HDRI !
Gasifier - producing the reducing gas: syngas, a mixture of H and CO
Further information needed !
Is this actually feasible on the small scale ? Are we missing something ? Does the process take place at atmospheric pressure ?
External links
Wikipedia: Direct Reduced Iron