| 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.
