Sillimanite (Al2O3.SiO2) refractory, which is a neutral refractory, is not used in________________?

Related Mcqs:

Which of the following consumes the maximum tonnage of refractories annually in an integrated steel plant ?

A. Soaking pits B. Reheating furnace C. L.D. converter D. Rotary lime kiln...

Porosity is induced in insulating refractories by adding________________?

A. Powdered naphthalene B. Ammonium chloride/sulphate C. Calcium phosphate D. All A., B. and C....

Rotary kilns meant for calcination of limestone are lined with chrome magnesite in ______________ zone?

A. Preheating B. Cooling C. Burning D. All the above...

Pick out the wrong statement?

A. Fluxing material like lime is added in clay to reduce the vitrification temperature B. Main constituents of clay are alumina and silica C. Addition of sand in ceramic materials makes it non-plastic, increases its fusion point and reduces its shrinkage on burning D. Vitrification of fireclay material is done to increase its porosity...

Fireclay refractories have __________________?

A. Low co-efficient of thermal expansion B. Poor thermal spalling resistance C. Tendency to expand unduly high during firing D. Very high cost...