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Chemical Engineering - Refractory Technology

Exercise : Refractory Technology - Section 5
21.
Carbon bricks are not used in the lining of the
combustion chamber of blast furnace stoves.
electric furnaces.
highly chemical resistant equipments.
blast furnace hearth.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
22.
Pick out the wrong statement.
Fluxing material like lime is added in clay to reduce the vitrification temperature.
Main constituents of clay are alumina and silica.
Addition of sand in ceramic materials makes it non-plastic, increases its fusion point and reduces its shrinkage on burning.
Vitrification of fireclay material is done to increase its porosity.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
23.
Because of its very high refractoriness of the order of __________ °C, silicon carbide refractories are used in zinc smelting furnace, muffle furnace and for supporting the wares in tunnel kilns.
1800
2200
2400
2700
Answer: Option
Explanation:
No answer description is available. Let's discuss.
24.
Chrome magnesite bricks are
acidic in nature.
neutral in nature.
having higher RUL than silica bricks.
made by mixing 30% chromite and 70% periclase.
Answer: Option
Explanation:
No answer description is available. Let's discuss.
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