Direct reduced iron (DRI), also called sponge iron, is produced from the direct reduction of iron ore (in the form of lumps, pellets, or fines) into iron by a reducing gas which contains elemental carbon (produced from natural gas or coal) or hydrogen. When hydrogen is used as the reducing gas, no carbon dioxide is produced.
Direct reduced iron (DRI), also called sponge iron, is produced from the direct reduction of iron ore (in the form of lumps, pellets, or fines) into iron by a reducing gas which contains elemental carbon (produced from natural gas or coal) or hydrogen. When hydrogen is used as the reducing gas, no carbon dioxide is produced.
Source: Wikipedia "Direct reduced iron" · CC BY-SA 4.0
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