wiz-icon
MyQuestionIcon
MyQuestionIcon
1
You visited us 1 times! Enjoying our articles? Unlock Full Access!
Question

Write down the reactions taking place in different zones in the blast furnace

during the extraction of iron.

Open in App
Solution

During the extraction of iron, the reduction of iron oxides takes place in the blast furnace. In this process, hot air is blown from the bottom of the furnace and coke is burnt to raise the temperature up to 2200 K in the lower portion itself. The temperature is lower in the upper part. Thus, it is the lower part where the reduction of iron oxides (Fe2O3 and Fe3O4) takes place.

The reactions taking place in the lower temperature range (500 − 800 K) in the blast furnace are:

3Fe2O3 + CO→2Fe3O4 + CO2Fe3O4 + 4CO → 3Fe + 4CO2Fe2O3 + CO → 2FeO + CO2

The reactions taking place in the higher temperature range (900 − 1500 K) in the blast furnace are:

The silicate impurity of the ore is removed as slag by calcium oxide (CaO), which is formed by the decomposition of limestone (CaCO3).


flag
Suggest Corrections
thumbs-up
0
Join BYJU'S Learning Program
similar_icon
Related Videos
thumbnail
lock
Osmotic Pressure
CHEMISTRY
Watch in App
Join BYJU'S Learning Program
CrossIcon