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Hematite (mainly composed of Fe2 O3) is the main raw material of pig iron. If the mass fraction of iron in hematite is 52.5% (assuming it is not in the magazine)
1. The mass ratio of iron and oxygen in iron oxide is 7: 3 (56 * 2: 16 * 3 = 7: 3).

2.75%

Mass fraction of iron oxide = mass fraction of iron element/mass fraction of iron oxide

52.5%/( 1 12/ 160)=75%

Let the theoretical calculation require that the quality of this ore is X. ..

Fe2O3+3CO=2Fe+3CO2

160 1 12

75%x 42t

160/75% x = 1 12/42

X = 80t.

Answer: If you want to get 42t pure iron, you need 80t of this ore in theory.

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