Video: EC17-18-S1-Q01A

What is the name for the process of increasing the percentage of iron in iron ore by separating impurities from it?

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Video Transcript

What is the name for the process of increasing the percentage of iron in iron ore by separating impurities from it?

Iron ore is mined from the ground. And it contains other materials which can be considered contaminants. A high-quality ore like hematite, Fe₂O₃, is 30 percent oxygen by weight and 70 percent iron by weight. The more contaminants there are in the ore, the lower the concentration of iron in that ore. So rather than being 70 percent iron by weight, an ore, for instance, might only be 63 percent.

Removing these contaminants raises the concentration of iron in the iron ore. Therefore, the name for the process of increasing the percentage of iron in iron ore by separating impurities from it is concentrating.

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