| High Alumina Andalusite-Mullite Brick |
| Item | SK-36 | SK-37 | SK-38 | SK-40 |
| Refractoriness, ºC | 1790 | 1820 | 1850 | 1920 |
| Chemical composition | Al2O3, % | 55 | 65 | 70 | 82 |
| Fe2O3, % | 2.0 | 2.0 | 2.0 | 2.0 |
| Refractoriness under loading | 0.2Mpa, ºC(≥) | 1450 | 1480 | 1530 | 1600 |
| True porosity, % | 20-23 | 20-23 | 20-22 | 18-20 |
| Bulk density, g/cm3 | 2.25-2.4 | 2.3-2.5 | 2.4-2.6 | 2.5-2.7 |
| Cold crushing strength, MPa | 45 | 50 | 60 | 70 |
High Alumina Andalusite-Mullite Brick is an aluminum silicate material which content of more than 48%
alumina. It is formed and calcined from alumina or other raw
materials with high alumina content. The advantage of this material
are high thermal stability, refractoriness above 1770℃,good slag
resistance.
One of the important working properties of High Alumina Andalusite-Mullite Brick is the structural strength at high temperatures. The
high-temperature creep properties are also measured to reflect the
high-temperature structural strength. From the test, we knew that,
with the increase of the Al2O3 content, the structural strength
also become higher.
When the content of Al2O3 less than 70%, the load softening
temperature depends on the quantity ratio between the mullite
crystal phase and liquid phase. With the increase in the quantity
of mullite, It also increased. Therefore, reducing the content of
impurities in the raw materials is beneficial to improve the
quality of the High Alumina Andalusite-Mullite Brick.
Feature
1.High Alumina Andalusite-Mullite Brick have better thermal conductivity than clay bricks.
2.Because Al2O3 in high aluminum products is high and has less
miscellaneous mass, softening temperature under load is higher than
clay bricks.
3.The thermal shock resistance of High Alumina Andalusite-Mullite Brick is between clay and silica products.
Applications:
1. Furnaces of metallurgy industry, heat treatment furnace
2. Furnaces of chemical industry and construction industry.
3. Furnace of incineration of garbage, recirculating fluidized bed
furnace
Zhengzhou Annec CO., Ltd. was founded in 2003, and has been a
NASDAQ listed corporation since 2011 with ticker identification
ANNC. Annec had become the industrial leader within China in the
areas of refractory production, Engineering for hot blast stove of
blast furnace, and capability for EPC project. Annec has its own
Provincial Enterprise Technology Center and Top Combustion Hot
Blast Stove Research Centre, Annec (Beijing) Engineering &
Technology Co., Ltd and four Manufacturers for Refractories. The
annual output of different type of refractories can reach 150
thousand tons, and undertaken capability of more than 10 turnkey
projects for hot blast stove.
Annec is a national hi-tech company, and is accredited with
ISO9001:2008 quality control system standards, ISO12001:2004
environmental control system standards, and GB/T28001-2011 HAZOPS.
Annec has set up a thorough and effective management system with
practical considerations for her employees and community, and is
persistent in promoting employee self-value and product quality.
With these efforts, Annec was awarded the prestigious 2012
Zhengzhou Mayor Quality Prize.
