Question:
The presence of __________ in chromite refractory leads to bursting
The presence of __________ in chromite refractory leads to bursting
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In chromite refractories, iron oxide can cause bursting due to volume changes and internal stresses.
Updated On: May 7, 2026
- Lead oxide
- Potassium oxide
- Iron oxide
- Magnesium oxide
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The Correct Option is C
Solution and Explanation
Concept:
Chromite refractories contain chromium oxide and iron oxide phases. Certain oxides can cause volume changes during firing or service.
Step 1: Chromite refractories are prepared from chromite mineral.
Step 2: If excess iron oxide is present, it may undergo oxidation-reduction changes at high temperature.
Step 3: These changes may cause volume expansion or internal stress.
Step 4: Due to internal stress, the refractory can crack or burst.
Step 5: Hence, the presence of iron oxide in chromite refractory may lead to bursting. Therefore, the correct answer is: \[ \boxed{\text{Iron oxide}} \]
Step 1: Chromite refractories are prepared from chromite mineral.
Step 2: If excess iron oxide is present, it may undergo oxidation-reduction changes at high temperature.
Step 3: These changes may cause volume expansion or internal stress.
Step 4: Due to internal stress, the refractory can crack or burst.
Step 5: Hence, the presence of iron oxide in chromite refractory may lead to bursting. Therefore, the correct answer is: \[ \boxed{\text{Iron oxide}} \]
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