Industrial Difference between Fire Bricks and High Alumina Bricks

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Industrial Difference between Fire Bricks and
High Alumina Bricks Bio Link https//www.futuret
echtimes.com/fire-bricks-vs-high-alumina-bricks/
There is no doubt that the standards are fire
refractory bricks and high alumina bricks. But
while they are common refractory materials, it
does not mean one can use them interchangeably.
Fire refractory bricks and high alumina bricks
serve similar purposes. But that does not mean
that their applications are the same. That is why
one needs to do thorough research to decide
which one would better fit them. And in this
blog, you will learn the major industrial
difference between them.
High Alumina Bricks
These are aluminum silicate refractory and
contain over 55 percent alumina content. These
bricks have high thermal stability, and their
refractoriness is above 1770 degrees. Their slag
resistance is excellent as well. They are used in
lining blast furnaces, rotary kilns, electric
furnace tops, etc. They have an affinity towards
alkaline, compared to fire bricks closer to acid.
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Fire Clay Bricks
Fire Clay bricks (or acid proof bricks) are
another standard refractory material. These
bricks contain around 30 percent Al2O3 content
and are weak refractory bricks. These bricks can
easily resist acid gas or slag. But they have
weaker resistance to alkaline substances, a
disadvantage against alumina bricks. Good thermal
property and resistance to heat are some
benefits of fire bricks. Fire Clay Bricks Vs
High Alumina Bricks Standard differences between
fire clay bricks and high alumina
bricks Presence of Aluminum Oxide Aluminum
oxide is a major component in refractory bricks.
And while there are still disputes about the
limit of aluminum oxide content in these bricks,
it is widely accepted that high alumina bricks
have over 55 Aluminum oxide. Similarly, fire
bricks have an aluminum oxide content lower than
55. Refractoriness Another industrial
difference between these two is their different
refractoriness. In general, high alumina bricks
have higher refractoriness than fire clay
bricks. Refractory Under Load (RUL) Refractory
Under Load is directly linked to Al2O3 content.
Fire bricks have lower aluminum oxide content
and hence lower RUL capacity.
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That indicates that one can apply fire clay in
the subordinate parts of furnaces. They have
been used in sealing regenerator walls, lining
furnace doors, etc. pH Value High alumina
bricks have a pH value closer to 7, making them
neutral refractory bricks. That makes them
useful in the presence of both acid and basic
environments. Acid bricks, as the name suggests,
are acidic. That is because they contain acidic
impurities. But while they are useful in an
acidic environment, they are useless against
basic elements. Thermal Shock Fire brick has a
better thermal shock resistance than its high
alumina counterpart. Reason? Because corundum is
less likely to form transition. They also have
higher thermal expansion as well over
mullite. Linear Change for Reheating These
bricks expand as the temperature rises,
specifically before 1000 degrees. But the fire
clay expansion rate is around 0.6 which is half
of the high alumina bricks. So after the
temperature goes over 1200 degrees, the bulk
begins to shrink, leading to the collapse of the
structure. As is obvious from the differences
listed, fire clay bricks and high alumina bricks
are not the same. One needs to utilize them
appropriately to get the best possible result
with their usage. But another critical element is
crucial to get the best possible result. That
element is the quality of the refractory bricks
used. One must ensure that they only use the
finest quality refractory bricks for their
needs. And for that, they could not find a better
companion than one of the leading fire brick
manufacturers. Whatever your need, you will find
suitable solutions with us. We also offer
castable refractory cement. Source Link
https//www.futuretechtimes.com/fire-bricks-vs-hig
h-alumina- bricks/