Question:
\(\ldots\ldots\ldots\ldots\ldots\) refractories are used in burning zone of cement kilns.
\(\ldots\ldots\ldots\ldots\ldots\) refractories are used in burning zone of cement kilns.
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Cement kiln burning zones use basic refractories such as dolomite because the kiln environment is basic.
Updated On: May 7, 2026
- Alumina
- Dolomite
- Silica
- Fire clay
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The Correct Option is B
Solution and Explanation
The burning zone of a cement kiln is a very high-temperature zone.
In this zone, clinker formation takes place.
The refractory lining in this zone must resist high temperature, chemical attack, and clinker coating conditions.
Dolomite refractories are basic refractories.
They contain mainly:
\[
CaO
\]
and
\[
MgO.
\]
These oxides are suitable for cement kiln conditions because cement clinker and kiln atmosphere are basic in nature.
Dolomite refractories are therefore used in the burning zone of cement kilns.
Silica refractories are acidic and are not suitable for basic cement kiln conditions.
Fire clay refractories are less suitable for the severe burning zone.
Hence, the correct answer is:
\[
\text{Dolomite}.
\]
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