Basic impurities are removed as slag in the production of iron. Which formula is/are of slag?

C a (A l O_{2})_{2}

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

M g S i O_{4}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

M n S i O_{4}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

M n S i O_{3}

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $C a (A l O_{2})_{2}$
Iron is extracted from its oxide.
Extraction of iron is based on the reduction of Haematite( $F e_{2} O_{3}$ ) with carbon.
Slag formation:
Lime stone on heating decomposes to $C a O$ and CO
$C a C O_{3} \to C a O + C O_{2}$
CaO now reacts the impurities of ore called Gangue to form slag. Slag is the mixture of $C a S i O_{3}$ and $C a (A l O_{2})_{2}$ . The slag floats over the top of molten iron. Slag is a useful byproduct. It is used in road making, cement manufacturing a light weight building materials.
$F l u x + G a n g u e \to S l a g$
$C a O + S i O_{2} \to C a S i O_{3}$
$C a O + A l_{2} O_{3} \to C a (A l O_{2})_{2}$
Hence, option A is correct.

Suggest Corrections

Similar questions

In ___ process, impurities are removed by the addition of flux as slag.

Q. In metallurgy of iron, limestone provides flux for removing impurities as slag.

Q. In metallurgy of iron, limestone provides flux and impurities for removing as slag.

Q. The impurities which are not removed during ore concentration are called .........
(Gangue, flux, slag)

When copper pyrites is roasted in excess of air, a mixture of CuO + FeO is formed. FeO is present as impurity. This can be removed as slag during reduction of CuO. The flux added to form slag is

Join BYJU'S Learning Program