Low creep clay bricks are clay refractory bricks with low creep rate made of special pyrophyllite, andalusite, and fused mullite as the main raw materials, with a small amount of additives added, and are made by three-level batching, co-grinding fine powder and other processes.
(1) Low creep rate at high temperature;
(2) High compressive strength, wear resistance and impact resistance;
(3) Strong resistance to chemical corrosion;
(4) Good high temperature volume stability;
Blast furnace hot blast furnace: widely used in the lower wall, lower checker brick, supporting chord and other parts of the regenerator of the blast furnace hot blast furnace. It can withstand the scouring and erosion of high-temperature hot air, ensure the normal operation and thermal efficiency of the hot blast furnace, and play an important role in improving the efficiency and quality of ironmaking production.
Other high-temperature kilns: In addition to blast furnace hot blast furnaces, it is also suitable for various industrial kilns that need to operate stably for a long time under high temperature and high pressure conditions, such as glass melting furnaces, cement rotary kilns, etc. It can be used as lining materials to protect the steel structure of the kiln, reduce heat loss, and improve energy efficiency.
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Project |
Index |
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|
DRN-128A |
DRN-128B |
DRN-125 |
DRN-120 |
DRN-115 |
DRN-110 |
DRN-105 |
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|
W(Al2O3)/% |
μ0≥ |
45 |
45 |
45 |
42 |
40 |
36 |
32 |
|
σ |
2.5 |
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|
W(Fe2O3)/% |
μ0≤ |
1.5 |
1.8 |
1.5 |
1.8 |
1.9 |
2.0 |
2.0 |
|
σ |
0.4 |
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|
Apparent porosity/% |
μ0≤ |
15(17) |
18(20) |
20(22) |
20(22) |
22(24) |
22(24) |
22(24) |
|
σ |
2 |
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|
Normal temperature compressive strength/Mpa |
μ0≥ |
60(50) |
55(45) |
43(35) |
35(25) |
35(25) |
30(20) |
25(20) |
|
Xmin |
50(40) |
45(35) |
35(25) |
25(20) |
25(20) |
25(20) |
25(12) |
|
|
σ |
10 |
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|
High temperature flexural strength/Mpa |
μ0≥ |
6(5) |
5(4) |
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|
Creep rate/% （0.2Mpa,50h) |
μ0≤ |
1280℃× |
1280℃× |
1250℃ |
1200℃ |
1150℃ |
1100℃ |
1050℃ |
|
σ |
0.1 |
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|
Heating wire permanent change/% |
U-L |
1400℃×2h |
1350℃×2h |
1300℃×2h |
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