To resist spalling tendency, a refractory should have
Mullite is chemically represented by
Which of the following bricks should not be used, if the furnace is to be used intermit-tantly ?
Porosity of silica bricks varies from __________ percent.
Maximum shrinkage in volume occurring during burning/firing of dried refractories may be as high as __________ percent.
Cold crushing strength of fireclay bricks is about __________ kgf/cm2.
__________ bricks are used in the burning zone of a cement rotary kiln.
Sillimanite is a __________ refractory.
Refractory castables are used for
Colour of fireclay bricks is
Rate of slag attack on refractories increases with rise in temperature due to the
Carbon bricks are not used in the lining of the
Porosity of fireclay refractories is __________ percent.
Spalling tendency of refractories is reduced by increasing its
Carbon refractories are exclusively used in the
Furnace atmosphere for softening temperature determination of refractories (in which segar cones are placed) should be
High refractorinness of refractory bricks means, that it has a
Conversion of silica mineral to cristobalite is accompanied by reduction in its
The largest consumer of refractories is the __________ industry.
Which of the following is not a high alumina refractory material ?
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