The alkali-resistant firebricks use silica, coke stones and appropriate additives to improve the microstructure of the product.
The alkali-resistant firebricks use silica, coke stones and appropriate additives to improve the microstructure of the product. In the process of using, alkali-resistant refractory brick reacts with alkaline oxide to form a high-viscosity glass phase, which covers the surface of the firebrick to block the surface pores, prevents the infiltration of alkaline slag, and to meet the purpose of resisting alkali and resisting corrosion. On the basis of a common type of high-strength alkali-resistant refractory brick, it is produced by adding an additive to increase the compressive strength.
Advantages of Alkali-resistant Brick:
●High strength, stable volume
●Good alkali corrosion resistance
●Customerize mould according to different size requirements for free
Application of Alkali-resistant Brick:
Alkali-resistant bricks are widely used in large and medium-sized dry-process cement rotary kiln preheaters and decomposition furnaces.
|
Items |
Normal type |
High strength type |
Insulating |
Vault type |
|
AL2O3 /% ≧ |
25～30 |
25～30 |
25～30 |
30~35 |
|
Fe2O3%≤ |
2 |
2 |
2 |
2 |
|
SiO2 |
65~70 |
65~70 |
60～70 |
60~67 |
|
Refractoriness /℃ ≥ |
1650 |
1650 |
1650 |
1710 |
|
Bulk density (110℃×24h) g/cm3 ≥ |
2.15 |
2.25 |
≤1.65 |
2.2 |
|
Apparent porosity/% ≤ |
21 |
20 |
≧35 |
21 |
|
Compressive strength/ MPa ≥ |
35 |
60 |
15 |
35 |
|
0.2Mpa refractoriness under load /℃≥ |
1350 |
1300 |
1250 |
1400 |
|
Thermal conductivity average temperature 350±10℃（W/m.k） |
1.28 |
1.28 |
0.7 |
1.28 |
Nobaking ramming mass for iron notch is made of corundum, high quality bauxite and silicon carbide, and bonded by resins and tar. Installation can be done by ramming.
Main raw materials of Ladle Working layer gunning mix are corundum and magnesium aluminate spinel, after spraying use on the working layer surface in carbon-free ladle.
High temperature fired slide gate plates developed by Zhengzhou Caihua are produced via high speed mixing, high pressure pressing, high temperature firing, vacuum and pressurized pitch impregnation, precise surface grinding and hot stainless steel looping processes. Fired slide gate plates have low impurity and are stable on quality.
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