LOW POROSITY FIRECLAY BRICKS

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Product Description:

CNBMis the specialized manufacturer and supplier of refractory in China, Our products mainly include refractory bricks, refractory castable, refractory precast shape, insulating brick etc. For refractory castable and precast shape they are very popular in the Europe, North American area.

Advantage:

This series of products are made of super calcined flint clay and calcined bauxite, with high pressure formed and high temperature sintered. Due to its low apparent porosity, strong resistance to erosion and high refractoriness under load, they are wildly used in various furnaces, especially suitable to the middle and low parts of regenerator in glass furnaces.

Features:

1. Low bulk density, low thermal conductivity, good thermal performance.

2. Refractory category allow direct contact of fire, suitable for various atmosphere

3. Good integrity with furnace lining, long service life, easy operation, could be shaped freely

Typical Applications:

1. Furnaces of metallurgy industry, heat treatment furnace

2. Furnaces of chemical industry and construction industry.

3. Furnace of incineration of garbage, recirculating fluidized bed furnace

Specification:

                                                                              Low Porosity Fireclay Brick

              Index
Item              

Low Porosity Fireclay Products

DN-10

DN-12

DN-15

DN-18

AL2O3 % ≥

45

45

42

42

Fe2O3 % ≤

1.00

1.20

1.65

1.80

Bulk Densityg/cm3

2.40

2.35

2.30

2.25

A.P. % ≤

10

12

15

18

C.C.S (Mpa) ≥

70

65

60

48

   Refractoriness°C

    1750

1750

1750

1750

Reheating Linear Change%

1400°C×2h

-0.1~+0.05

1400°C×2h

-0.1~+0.05

1400°C×2h

-0.2~0

1400°C×2h

-0.4~0

0.2mpa Refractoriness under loadT0.6 ≥ °C

1500

1470

1450

1400


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Q:Are there any good improvement measures for the always collapse of the previous vaulted tunnel kiln built by refractory bricks?
refractory castable integrally casting
Q:air-cooled razheng times of magnesia-alumina spinel refractory bricks
The ingredients are magnesium, oxygen, and aluminum. the components of spinel refractory can be magnesia-alumina spinel with excessive aluminium oxide, or magnesia-alumina spinel with excessive magnesium oxide. excessive magnesium oxide and aluminium oxide can form magnesia-alumina spinel in above 1700 degrees.
Q:how to distinguish the quality of high alumina refractory brick when you buy it ?
see the gap between the bricks and between kiln roof and kiln wall, etc.. 6, the pressure and the volume density of Pei brick and brick Pei size, appropreate matching of high alumina powder and high aluminous aggregate and other materials, the drying and time, and the mud trapped material humidity 1. 7, to reach the requirements of production. 4, the order of loading Pei brick into kiln . should prevent the lack of a scene , the requirement , mixing time, different procedure and the order of the adding of raw materials of high alumina brick. 3, drawing plan and lack of edge of high alumina brick . 5
Q:What is the relationship between the firing process and the manufacturing technique of fireclay bricks?
Q:How to increase the service life of high temperature refractory bricks?
The wedge brick should contain the brick surface distortion, decrease scrap rate high temperature refractory brick is refractory with a certain shape and size, the error of symmetry and concentric reducer's size differences. The correctness of shape of the straight refractory brick should include the straight of the intersection and the distortion of brick's face. Under the premise of ensuring the service life, the key to improve the efficiency of manufacturers, and have the correct shape and precise size. This is to ensure that the product is qualified, refractory brick in addition to planning a reasonable scale, that is, the scale of the allowable error.
Q:In tunnel kiln, what is the meaning of refractory proportion 2.0?
The proportion of refractory bricks is related to the density.
Q:How to test the various components of the refractory brick?
It is difficult to distinguish if it is mixed together, fully smashing and mixing. Then assay. Or testing after smashing and separating.
Q:The service life of the refractory brick of the intermediate frequency electric furnace, how long is the replacement period.
There is no standard. As long as the induction coil can be fixed and furnace lining can be built, the service life will be different. Replace it if it's broken, and there is no problem to take it apart. Buy a backup. And the textures of refractory brick are not the same in different places.
Q:How to prevent high alumina refractory brick from producing crack when reproduce high alumina refractory brick?
1-1, on the 1 in order to prevent the emergence of crack in the production of high alumina refractory brick. 2 is appropriate, the water absorption rate of the tube mill should be controlled below 6%, the excess air coefficient controlled between level 1 and 2. The water absorption rate of clinker of bauxite with high alumina controlled under 4%-5%, making the high aluminum refractory brick burning in a smoothly and steadily weak oxidation atmosphere, and should be adjusted by thermotechnic
Q:What kind of refractory brick is used for industrial furnace?
high alumina brick, Corundum mullite

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