Question:
\(\ldots\ldots\ldots\ldots\ldots\) is used as mineralizer in Silica refractories.
\(\ldots\ldots\ldots\ldots\ldots\) is used as mineralizer in Silica refractories.
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Lime is used as a mineralizer in silica refractories to help phase transformation and bonding during firing.
Updated On: May 7, 2026
- Lime
- Soda ash
- Magnesite
- Chromite
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The Correct Option is A
Solution and Explanation
Silica refractories are mainly made from silica.
During firing of silica bricks, silica undergoes phase transformations.
Quartz transforms into other silica forms such as tridymite and cristobalite.
To control and promote these transformations, mineralizers are added.
A mineralizer helps in improving the conversion of silica phases during firing.
Lime is commonly used as a mineralizer in silica refractories.
Lime helps in the formation of desired high-temperature silica phases and improves bonding.
Soda ash is a flux, but it is not the standard mineralizer in this context.
Magnesite is used for basic refractories.
Chromite is used in chromite and chrome-magnesite refractories.
Therefore, the mineralizer used in silica refractories is:
\[
\text{Lime}.
\]
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