Low creep high alumina brick for hot blast stove

Low creep and 高鋁磚 are high-grade refractory materials made of alumina, fused corundum, and fused mullite as the main raw materials.

特別服務

1. 耐火度

The refractoriness of low-creep and high-alumina bricks is higher than that of clay bricks and semi-silica bricks, reaching 1750~1790℃, which is a high-grade refractory material.

2.荷重軟化溫度

由於高鋁製品Al2O3高，雜質少，易熔玻璃體少，荷重軟化溫度比粘土磚高。但由於莫來石晶體不形成網狀結構，荷重軟化溫度仍不如矽磚高。

3. 抗渣性

Low creep and high alumina bricks contain more Al2O3, which is close to neutral refractory materials, and can resist the erosion of acidic slag and alkaline slag. Because it contains SiO2, the ability to resist alkaline slag is weaker than that of acidic slag.

使用

Mainly used for lining of blast furnaces, hot blast furnaces, electric furnace tops, blast furnaces, reverberatory furnaces, and rotary kilns.

項目		低蠕變高鋁磚
項目		DRL-155	DRL-150	DRL-145	DRL-140	DRL-135	DRL-130	DRL-127
Al2O3,% ≥		75	75	65	65	65	60	50
Apparent porosity，% ≤		20	21	22	22	22	22	23
堆積密度，g/cm3		2.65-2.85	2.65-2.85	2.50-2.70	2.40-2.60	2.35-2.30	2.30-2.50	2.30-2.50
Compressive strength at room temperature, Mpa ≥		60	60	60	55	55	55	50
Creep rate % （0.2Mpa,50h) ≤		1550℃ 0.8	1500℃ 0.8	1450℃ 0.8	1400℃ 0.8	1350℃ 0.8	1300℃ 0.8	1270℃ 0.8
Change rate of reburning line %	1550℃,2h	0.1－-0.2	0.1－-0.2	0.1－-0.2
Change rate of reburning line %	1450℃,2h				0.1－-0.2	0.1－-0.4	0.1－-0.4	0.1－-0.4