70% High Alumina Andalusite-Mullite Brick Used For The Burner Of Hot Blast Stove

70% High Alumina Andalusite-Mullite Brick​ are produced with selected bauxite chamotte by advanced process and strict quality control. The main mineral components are corundum and mullite phases. Its features are excellent high temperature mechanics and chemical corrosion resistance.

If Al2O3 content is higher than 90%, it is called corundum brick. Due to different resources, national standards are not completely consistent. For example, European countries have stipulated that the lower limit of Al2O3 content for high-alumina refractories is 42%. In China, according to the content of Al2O3 in 70% High Alumina Andalusite-Mullite Brick​ , it is usually divided into three grades: Grade I──Al2O3 content>75%; Grade II──Al2O3 content is 60～75%; Grade III──Al2O3 content is 48～60%.

The production process of 70% High Alumina Andalusite-Mullite Brickand multi-clinker clay bricks are similar.

The difference is that the proportion of clinker in the ingredients is higher, which can be as high as 90-95%.

The clinker needs to be sorted and sieved to remove iron before crushing, and the firing temperature Higher, such as Ⅰ, Ⅱ high alumina bricks are generally 1500～1600℃ when fired in tunnel kiln.

Production practice in China has proved that before crushing, high-aluminum clinker is strictly sorted and classified, and stored in tiers.

The use of bauxite clinker and combined clay fine grinding method can improve product quality.

Production process:

The production methods of 70% High Alumina Andalusite-Mullite Brick and clay bricks are basically the same.

Only some process parameters are different. There are also processes such as crushing → mixing → molding → drying → firing → inspection → packaging.

The compressive stress is better at low temperature, but slightly reduced at high temperature, so the stack in the kiln is less than 1 meter. The production process of high-alumina refractory bricks and multi-clinker clay bricks is similar.

The difference is that the proportion of clinker in the ingredients is higher, which can be as high as 90%-9%. The clinker needs to be sorted and sieved before crushing. The firing temperature is higher. For example, high-alumina refractory bricks such as Ⅰ and Ⅱ are generally 1500～1600℃ when fired in tunnel kiln.

Production practice proves that high-alumina clinker is strictly selected and classified before crushing, and is stored in tiers. The co-fine grinding method of bauxite clinker and combined clay can improve the quality of high-alumina refractory brick

Aluminum oxide (Al2O3) content is higher than 48% 70% High Alumina Andalusite-Mullite Brick

A neutral refractory with an alumina content of more than 48%.Made of bauxite or other raw materials of high alumina content after molding and calcining.High thermal stability, refractoriness in 1770℃ above.Good slag resistance, used for lining steelmaking electric furnace, glass furnace, cement converter, etc.

High charge soft, 70% High Alumina Andalusite-Mullite Brick is a high grade refractory material made of super grade bauxite, fused corundum and fused mullite.

Feature
1. Good Cold Crushing Strength
2. High Refractoriness Under Load
3. Good Thermal Shock Resistance
4. Low Reheating Linear Rate

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
Standard sizing: 230 x 114 x 65 mm others up to the client

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.