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After iron ore is mined it is crushed into a powder then injected into a blast furnace. Under the extreme temperatures the ore melts and since iron is more dense than the impurities, it sinks to the bottom. This leaves a film of "slag" (impurities) on top. The slag is then skimmed off so only the metal remains.

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12y ago
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6y ago

Impurities in iron could be "burned off" by blowing air through molten iron.

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14y ago

it can be found in iron pipes and tummies

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Q: What is the method for purifying iron?
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