Pure bauxite is the best raw material for the manufacture of high alumina refractories, in which maximum alumina content can be as high as _____________ percent?

Related Mcqs:

Refractory castables are used for__________________?

A. Producing monolithic linings B. Patch work C. Minimising the number of joints in the structure D. All A., B. and C....

Chromite refractories_____________________?

A. Are bonded with lime and clay B. (Free from silica) have better thermal fatigue resistance than silica and magnesite refractories. C. Are resistant to basic slag D. All A., B. and C....

An indication of degree of firing in silica brick is its____________________?

A. Specific gravity B. Fusion point C. RUL D. None of these...

Upper portion of hot metal mixer are lined with mullite bricks, which helps in resisting the_________________?

A. Washing action of metal B. Corrosion by layer of slag C. Both A. & B. D. Neither A. nor B....

. Refractoriness under load (RUL) of fireclay bricks (under a load of 2 kg/cm2) is ______________ °C?

A. 500 B. 1000 C. >1350 D. >2000...