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low creep high alumina bricks

High alumina brick is a kind of neutral refractory material content of alumina above 75%. It’s made of bauxite or other raw matrials with high density alumina, by process of shaping and calcinating.

 

Character: High purity alumina bricks is charactered by its high tempreture resistance above 1770℃,and strong anti-slag ability.

 

Physical and Chemical Data

item high-alumina brick for hot stove low-creep series high-alumina bricks
RL-65 RL-55 LDRL-150 LDRL-150 LDRL-145 LDRL-140 LDRL-135 LDRL-130
AL2O3%  ≥ 65 55 75 75 65 65 65 60
refractoriness ℃  ≥ 1790 1770 1790 1790 1800 1850 1850 1850
0.2MParefractoriness under load ℃  ≥ 1500 1470 1550 1550 1500 1500 1500 1480
linear change after heating %(1500℃×2h) 0.1 0.1 ±0.2 ±0.2 ±0.2 ±0.2 ±0.2 ±0.2
-0.4 -0.4
apparent porosity % ≤ 24 24 20 21 19 23 23 23
cold crushing strength MPa  ≥ 49 44.1 60 60 60 50 45 45
creep rate(0.2MPa×50h)%  ≤     1550 1500 1450 1400 1350 1300
    0.4 0.4 0.4 0.4 0.4 0.4
    0.6 0.6 0.6 0.6 0.6 0.6
    0.8 0.8 0.8 0.8 0.8 0.8

Application: High purity alumina brick is mainly applied in building blast furnace, hot blast stove, electric furnace, reverberatory and the linings of rotary kilns.

In addition, it is widely used as the regenerator checkers, casting system stoppers end, and nozzle bricks.

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