Refractory Fireclay Brick- (UNF42) High Strength

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Tianjin
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20 m.t.
Supply Capability:
50000 m.t./month

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Product Description:

CLAY BRICK---UNF42

CMAX fireclay bricks are made from clinker clay. The alumina content ranges from 36% to 48%.

Application
CMAX fireclay bricks are commonly applied in blast furnace, hot blast furnace, teeming ladle, glass furnace, etc.

Features
Low thermal conductivity High refractoriness
High mechanical strength Excellent thermal shock resistance

High refractoriness under load
High mechanical strength
Excellent thermal shock resistance
Corrosion resistance.

Good resistance against acid slag
High mechanical strength
Stable performance under high temperature environment


Physical Properties:

ITEM UNF42
Refractoriness, 1730
Bulk Density, g/cm3 2.15
Apparent Porosity, % 22
C. C. S, Mpa 30
Refractories Under Load (0.2Mpa), 1400
Reheating Linear Change, % 1400x2h 0.1~-0.4
Al2O3 Content, % 42

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Q:How many squares of a ton refractory bricks?
About 2 tons , general one square clay brick is about 2 tons, from 2, one square corundum brick or magnesia bricks can reach 3 tons, it should say one square is how many tons. if it is high aluminum, then see the content of aluminum. It mainly sees what refractory bricks, because the volume and density of refractory bricks are relatively large.2 tons to 2
Q:What is the refractory brick in silicious model?
Adding appropriate amount of mineralized agent to promote the transformation of quartz in the body into phosphorus quartz. Smaller coefficient of thermal expansion. Also used in high temperature bearing part of hot blast stove and acid open hearth furnace, refractory materials and ceramic kiln, kiln vault and other load-bearing parts, thermal shock resistance variation. High temperature strength. the glass furnace is burnt in 1430 to 1350 degrees Celsius in the reducing atmosphere. use natural silica as raw materials. True density 2. more than 93% of silica content. generally there is no crystal type transformation above 600 degrees celsius. With acid slag erosion and sediment chamber regenerator performance, soaking furnace, open hearth furnace. there is more crystal type transformation below 600 degrees celsius. mainly used in coking chamer of coke oven and partition of firebox. acid refractory material made of high thermal shock resistance, large volume change, square quartz and a small amount of residual quartz and glass box . Long term use at high temperature without deformation
Q:In tunnel kiln, what is the meaning of refractory proportion 2.0?
That is the volume density of the refractory brick
Q:why the color of refractory brick is white after high temperature firing when the meteorite is black after the burning?
There are different reasons. Meteorolites can mainly be divided into three types, iron meteorites (iron nickel alloy): Stone meteorites (the main component is silicate), and stony iron meteorites(the mixture of iron and silicate)
Q:What are the disadvantages of sintered clay bricks?
Disadvantages: FrostPan cream also known as cream, is salting out phenomenon in the process of using brick. The excess soluble salt in the brick is affected by water absorption and dissolves when water evaporates. When the crystal is precipitated, it expands and causes the brick surface to flake. Standard: excellent products without efflorescence, first do not allow secondary efflorescence, qualified products is not allowed to have serious flooding.Lime crackingLime burst refers to brick with limestone, turn after absorbing water, because the lime burst and the expansion of the gradually maturing. This phenomenon affects the quality of bricks and reduces the strength of masonry
Q:What are the main components of refractory bricks
There are several kinds of refractory brick, clay brick, carborundum brick, chromium carbon.
Q:What are the differences between high alumina brick and high alumina refractory brick?
High alumina brick is generally the national standard T-3 models, high alumina refractory brick is brick with more than 55% of aluminum content including special-shaped brick.
Q:What is the heating temperature in the test method of thermal shock resistance of refractory bricks
1, quenching (air cooling or water cooling), after the completion of the specified number of times. 2, maintain 20min, introduce the following types briefly. 3, repeated testing and record the times of the material produces macro cracks. The thermal shock resistance is shown by the times of thermal cycle of damaging half of the heated end face, quenching(air cooling or water cooling ) there are many expressions and testing methods of the thermal shock resistance, and then dry. Put the heating end surface of standard size brick((200~230mm) X (100~150 m K (50~100mm) claw)into the preheated to 1100 DEG C 50mm in furnace, quenching (air or water), then quenching in room temperature water for 3min, measured the maximum temperature of sample surface produces cracks. After the temperature of the material rises to a predetermined temperature, the ratio of residual anti-bending strength and anti-bending strength at room temperature before heat shock, after the material rises to various temperatures, measure its strength retention rate.
Q:several refractory brick of rotary kiln several is damaged, how many refractory bricks should be replaced?
In general, if the brick inside the kiln break or loose core, the bricks of whole circle should be replaced, if only mend by replacing a damage part is also ok, but the service life is shorter.
Q:what kind of refractory brick is suitable for 1300 degrees converter?
magnesia-carbon brick, you can also use MgO-Al2O3 castable, it is good too.

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