old ways used to extract iron ore

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    About 98% of world iron ore production is used to make iron in the form of steel.(i.e. greater than 541 million years old). BIFs occur on all continents.

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    mining technology extracting ore .you will learn about the different methods used to extract minerals from thethe world's largest iron ore mine,

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    mining technology extracting ore .you will learn about the different methods used to extract minerals from thethe world's largest iron ore mine,

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