Refractory Technology Questions

• Which is not a high alumina refractory?
• Ramming masses are used for
• __________ is the measure of the strength of refractory under the combined effect of temperature & load.
• 10 to 30% magnesite is added to chromite to produce chrome-magnesite refractories. Magnesite addition is mainly done to improve the __________ of chromite.
• High alumina refractory compared to fireclay bricks have
• Pick out the wrong statement.
• Addition of zircon to silica refractory brick improves its
• Which of the following impurities reduces the refractoriness of magnesite bricks?
• Crushing strength of a refractory
• Refractory bricks having lower porosity have
• Refractoriness under loads (RUL) is quite close to the fusion temperature (PCE) for __________ bricks.
• Fireclay refractories
• Rotary kilns meant for calcination of limestone are lined with chrome magnesite in __________ zone.
• In panel test for spalling resistance, the average face temperature of panel assembly is maintained at __________ °C for 24 hours.
• Hot blast main (carrying air at 1000°C) in blast furnace are lined with __________ bricks.
• Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of
• Pick out the wrong statement.
• Dolomite bricks have good resistance to attack by
• Magnesite chrome refractories
• Silica bricks are never used for lining the