Civil Engineering - Building Materials - Discussion

The correct answer is: 4. all the above.

Explanation:
When melting one tonne of cast iron, several inputs are required for efficient and effective operation: 700 m³ of air:

Air is essential for combustion in the furnace. Oxygen from the air helps burn the coke, which provides the heat necessary to melt the cast iron.
A large volume of air is needed to ensure complete combustion of the fuel.

20 kg of limestone:
Limestone acts as a flux. It helps remove impurities, such as silica (SiO₂), from the molten metal by forming slag. This improves the quality of the cast iron.

One quintal (100 kg) of coke:
Coke is used as the primary fuel in the furnace. It burns to produce heat, reaching the high temperatures needed to melt the iron.
It also serves as a reducing agent, aiding in the chemical reduction of iron ore if present.

Thus, all the above components are essential for melting one tonne of cast iron in a furnace, ensuring efficiency and quality in the process.

It should be coal.

Is it coke or coal?

Please describe it clearly.

Give an explanation of the answer.

Please explain the answer in detail.

Please explain the answer in detail.

Please explain the answer in detail.

1 quintel = 100 basic units.

1 quintal = 100 kg.