Low Porosity Brick

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Product Description:

Specifications

low iron and low porosity and high density

material

HA65

FC40

FC35

FC30

ap%

≤17

≤15

≤15

≤15

bd g/cm3

≥2.6

≥2.25

≥2.2

≥2.15

ccs  Mpa

≥60

≥45

≥40

≥30

rul  °C

≥1520

≥1400

≥1350

≥1300

AL2O3 %

≥65

≥40

≥35

≥30

Fe2O3   %

≤1.7

≤1.7

≤1.7

≤1.7

SiO2    %

≤31

≤56

≤61

≤66

Item

Index

volume density g/cm3

≤1.2

service temperature/ C°

1350

thermal conductivity 1200°C/ w/m.k

≤0.5

(1400°C×12h)

Heating permanent line changes/ %

-0.8~0

compressive strength under high temperature/ MPa 1200°C

≥2.8

compressive strength under normal temperature/ MPa

≥5

(0.01MPa×0.5%)°C

≥1450

Item

Index

volume density g/cm3

≤1.60

service temperature/ C°

1400

thermal conductivity 1250°C/ w/m.k

≤0.61

(1400°C×12h)

Heating permanent line changes/ %

0~-0.5

compressive strength under high temperature/ MPa 1250°C

≥6

compressive strength under normal temperature/ MPa

≥12.0

Item

Index

volume density g/cm3

≤1.90

service temperature/ C°

1400

thermal conductivity 1250°C/ w/m.k

≤0.80

(1400°C×12h)

Heating permanent line changes/ %

-0.5~0

compressive strength under high temperature/ MPa 1250°C

≥12

compressive strength under normal temperature/ MPa

≥30

Refractoriness under load(0.01MPa×0.5%)°C

≥1450


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Q:What kind of material is good to be laid on the kiln car, refractory brick?
Ceramic fiber blanket
Q:Lining of refractory bricks in rotary furnace
The lining of the converter is probably a furnace, but if it is changed at least to see the material and the use of it. There are a lot of damage to the lining, such as: The total impurity content reduces to 2%, lining life will increase 20%-40%; CAO in brick is of 60%-80% content , lining life are the highest; also some other proper index can not be ignored such as bulk density,heat/thermal shock resistant performance,porosity,thermal expansion,fracture resistace,volume stability,Slag resistance,and so on. In addition, lining erosion rate is the largest when the basicity of slag is 1, with the increase of basicity, erosion rate decrease rapidly, the temperature can cause cracks spalling of lining. At the same time, the building process is also very important.
Q:the refractory brick in glass furnace burner was burning, the bricks on both sides of the fire hole were burning the blocked it, what will cause brick burning?
The firebrick in glass melting furnace is mainly consisted of zircon brick, other ordinary refractory materials can not effectively prevent the erosion of glass solution. Because the glass melting liquid is eutectic mixture compared to the refractory bricks, it penetrates into the refractory brick and reduces its original performance, simply speaking, the glass melting liquid dissolves the refractory bricks as eutectic mixture .
Q:What are the main components of refractory bricks
Mainly is magnesium oxide, sodium silicate as a binder
Q:Is refractory brick afraid of rain?
High alumina clay is not afraid of rain, but covering is better, magnesium carbon refractory brick had better not be rained.
Q:what effect does big mortar joints of the boiler refractory brick have on the boiler?
The ventilation leakage。 Now the larger boilers are generally used refractory pouring material one-time pouring, the arch is easy to collapse . 2, shrinkage and expansion of brick will make the bricks fall. 1, do not use the refractory brick. too large seam will effect the tightness of furnace wall , and the water wall is easy to form dew and be corroded and to leak smoke.
Q:How much fireclay is needed per cube refractory bricks?
Normal refractory bricks need to use 70-80kg refractory mud each cubic . In fact, this can be calculated, because the volume of refractory bricks and refractory mud density can be measured. Of course, here is an important point, that is the size of the brick seam, 1mm brick seam and 3mm is significantly different. Sichuan brand refractory mud has many kinds, like high aluminum, clay, corundum, magnesia, insulation and so on, the dosage is different.
Q:buliding method of refractory bricks in boilers
Q:What's the reason of cracks in refractory bricks?
This is inorganic nonmetallic material
Q:What kind of refractory brick is suitable for 24*28m rotary kiln of 5,000 tons?
Magnesia spinel brick and magnesia hercynite brick

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