Engineering Materials
In the lower part of the blast furnace (zone of fusion), the temperature is

1500°C to 1700°C
1200°C to 1300°C
400° to 700°C
800°C to 1000°C

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Engineering Materials
Smelting is the process of

All of these
Removing the impurities like clay, sand etc. from the iron ore by washing with water
Expelling moisture, carbon dioxide, sulphur and arsenic from the iron ore by heating in shallow kilns
Reducing the ore with carbon in the presence of a flux

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