Carbon brick heat insulation Refractory Materials Iron and steel
Refractory bricks are called refractory bricks. Refractory fired
from refractory clay or other refractory materials. Light yellow or
brown. It is mainly used in building smelting furnace and can
withstand high temperature of 1580 ℃ - 1770 ℃. Also called
refractory brick. Refractory of certain shape and size. According
to the preparation process, it can be divided into sintered brick,
non sintered brick, fused cast brick (fused cast brick) and
refractory and heat insulation brick; It can be divided into
standard brick, ordinary brick, special-shaped brick, etc.
according to shape and size. It can be used as the structural
material of high-temperature building materials, building kilns and
various thermal equipment. It can withstand various physical and
chemical changes and mechanical effects at high temperature. Such
as refractory clay brick, high alumina brick, silica brick,
magnesia brick, etc.
Carbon brick has good thermal stability, small coefficient of
thermal expansion, high temperature resistance, resistance to the
erosion of various acids, alkali, salt and organic solvents, but
easy to oxidize in an oxidizing atmosphere.
Carbon brick is dark gray, shiny, burned into a good carbon brick
does not stain the hand, with a small hammer knock clear sound.
High refractoriness and load softening temperature, good thermal
shock resistance; It is not wet by molten slag and molten iron, and
almost not corroded by all acid, alkali, salt and organic drugs. It
has good slag resistance, stable volume at high temperature, high
mechanical strength, good wear resistance, and good electrical and
In addition, carbon is easy to oxidize, whether the raw material
calcination or product roasting and the use of products, must be
carried out in the reducing atmosphere.
Carbon brick by coke, anthracite or graphite and tar as raw
materials, after mixing, forming, in the reduction flame burned to
1450℃ and become a carbon refractory material. The mass fraction of
carbon is 88%-90%. Can withstand the erosion of molten metal and
slag, but easy to oxidize. Used for laying bottom and belly of