High Aluminum Brick for Blast Furnace Introduction
High alumina brick for blast furnace is made of high grade bauxite as the main raw refractory material, which is prepared by pressing, pressing, drying and high temperature firing. It is a refractory product used for laying lining of blast furnace.
High Alumina Brick for Blast Furnace Feature
1.High refractoriness.
2.Good wear resistance.
3.High load softening temperature.
4.Strong resistance to acid, alkali, slag.
High Alumina Brick for Blast Furnace Specification
| Item |
High alumina brick for blast furnace |
Blast furnace clay brick |
| GL-65 |
GL-55 |
Gl-48 |
ZGN-42 |
GN-42 |
| Al203 |
65 |
55 |
48 |
42 |
42 |
| Fe203 |
2.0 |
2.0 |
2.0 |
1.6 |
1.7 |
| Refractoriness |
1800 |
1780 |
1760 |
1760 |
1760 |
| Density Bulk |
2.6 |
2.5 |
2.4 |
2.3 |
2.2 |
| Apparent Porosity |
19 |
19 |
18 |
15 |
16 |
| 0.2Mpa Refractoriness Under Load |
1500 |
1480 |
1450 |
1450 |
1430 |
| Cold Crushing Strength |
58.8 |
49.0 |
49.0 |
58.8 |
49.0 |
| Reburning linear change |
1450℃ |
- |
1450℃*2h
0~0.2 |
1450℃*3h
0~0.2 |
1450℃*3h
0~0.2 |
| 1500℃*2h |
| Air permeability |
This test must be carried out to prove the measured data in the quality certificate. |
High Alumina Brick for Blast Furnace Application
High alumina brick is built in the furnace part of the blast furnace. The furnace body is in the upper part of the blast furnace, and its diameter is gradually expanded from top to bottom to adapt to the thermal expansion of the furnace material and reduce the friction of the furnace wall against the charge. The furnace body occupies the blast furnace. 50%-60% of the effective height.High alumina brick applicable to metallurgical equipment such as electric furnace top, ironmaking blast furnace, hot blast furnace, non-ferrous smelting, chemical, cement and other industries.
Why Choose High Alumina Brick Use in Blast Furnace
(1) The content of ferric oxide (Fe2O3) is low, mainly to limit the deposition of carbon black and prevent it from reducing the refractoriness due to the formation of low melting point refractory materials with SiO2.
(2) The content of A12O3 should be high to ensure a high degree of refractoriness, so that the brick works well under high temperature.
(3) The load softening start temperature is high. Because the blast furnace masonry works under high temperature and high pressure conditions.
(4) The porosity, especially the apparent porosity, is low, preventing deposition of carbon black and the like and increasing wear resistance.
