Low creep high alumina brick for hot blast stove

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

Izici

1. Refractoriness

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. Layisha ukushisa okuthambile

Ngenxa yokuthi imikhiqizo ene-alumina ephezulu ine-Al2O3 ephezulu, ukungcola okuncane, kanye nemizimba yeglasi engabumbeki kangako, izinga lokushisa lokuthambisa umthwalo liphakeme kunalelo lezitini zobumba. Kodwa-ke, ngoba amakristalu e-mullite awenzi isakhiwo senethiwekhi, izinga lokushisa lokuthambisa umthwalo alikaphakeme njengalelo lezitini ze-silica.

3. Ukumelana kweSlag

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.

ukusetshenziswa

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

project		Izitini eziphakeme ze-alumina eziphansi
project		I-DRL-155	I-DRL-150	I-DRL-145	I-DRL-140	I-DRL-135	I-DRL-130	I-DRL-127
Al2O3,% ≥		75	75	65	65	65	60	50
Apparent porosity，% ≤		20	21	22	22	22	22	23
Ubuningi besibalo, 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