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(C) The blast furnace is used for the extraction of iron from its ore. Because the temperature inside the blast furnace is extremely high,the inner li

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Fire bricks

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(C) The blast furnace is used for the extraction of iron from its ore. Because the temperature inside the blast furnace is extremely high,the inner lining must be made of materials that can withstand high heat without melting or reacting. These are known as fire bricks or refractory bricks,which are primarily composed of alumina $(Al_2O_3)$ and silica $(SiO_2)$.

The inner lining of a blast furnace is made of ...........

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