Refractory Technology Zirconia refractory Can not be used as an insulator Is produced from baddeleyite Has poor electrical conductivity at high temperature Does not react with basic slags Can not be used as an insulator Is produced from baddeleyite Has poor electrical conductivity at high temperature Does not react with basic slags ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Magnesite chrome refractories Are not at all resistant to the corrosive action of iron oxide Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have very low thermal co-efficient of expansion Have better spalling resistance than chrome magnesite refractories Are not at all resistant to the corrosive action of iron oxide Have very low (50 kg/cm² ) cold crushing strength (C.C.S.), and can not be used in metalcase form Have very low thermal co-efficient of expansion Have better spalling resistance than chrome magnesite refractories ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Fireclay refractories Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc All of these Are not resistant to the action of basic slags Shrink during firing Combine with salts (e.g. chlorides sulphates etc.) & bases (e.g. lime, magnesia etc.) forming fusible aluminates silicates etc All of these Are not resistant to the action of basic slags Shrink during firing ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Thermal conductivity of refractory bricks Increases with the amount of air entrapped in pores Is independent of its porosity and is maximum for insulating bricks Increases with decrease in porosity Decreases with decreases in porosity Increases with the amount of air entrapped in pores Is independent of its porosity and is maximum for insulating bricks Increases with decrease in porosity Decreases with decreases in porosity ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology The main raw material for manufacture of silicon carbide refractories is Corrundum Periclase Bauxite Carborundum Corrundum Periclase Bauxite Carborundum ANSWER DOWNLOAD EXAMIANS APP
Refractory Technology Refractoriness/fusion points of 'superduty' refractories is __________ °C. > 1730 1520-1630 1630-1670 > 2000 > 1730 1520-1630 1630-1670 > 2000 ANSWER DOWNLOAD EXAMIANS APP
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