Refractory Technology MCQs

dehydrate the dried refractory.

develop stable mineral forms in them.

form ceramic bonds necessary for development of high crushing strength in the finished product.

all (a), (b) and (c).

Graphite

Fireclay

Alumina

Zircon

are wetted by molten iron.

are used in the hearth of blast furnace.

are acidic in nature.

all (a), (b) and (c).

Tar bonded dolomite bricks

Fireclay bricks

Magnesite bricks

Chromite bricks

acidic in nature.

neutral in nature.

having higher RUL than silica bricks.

made by mixing 30% chromite and 70% periclase.

1520-1630

1630-1670

> 1730

> 2000

buckstay

breast wall

armouring

baffle

fireclay

direct bonded basic

silica

magnesite

carbides

oxides

borides

nitrides

less fusion point.

better spalling resistance.

both (a) and (b).

neither (a) not (b).