Industry 40% Al2O3 Mullite High Alumina Refractory Bricks

Mullite Dense 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 high alumina bricks, 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 Mullite Dense Brick and 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 Mullite Dense 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% aluminum silicate refractory products.

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, Mullite Dense Brick is a high grade refractory material made of super grade bauxite, fused corundum and fused mullite.

Application:

Mullite Dense Brick used for lining blast furnaces, hot blast stoves, electric furnace tops, blast furnaces, reverberatory furnaces, and rotary kilns. In addition, high alumina bricks are also widely used as open hearth regenerative checker bricks, plugs for pouring systems, nozzle bricks, etc. However, the price of high alumina bricks is higher than that of clay bricks, so it is not necessary to use high alumina bricks where clay bricks can meet the requirements.

1. Iron&steel making industry:

Blast furnace,hot blast furnace(stove),pellet shaft furnace,hot metal ladle,steel ladle, tundish,heating furnace,soaking pit furnace,heat treatment furnace,refining furnace,reheating furnace,metal mixter furnace,annealing furnace, cupola furnace,electric arc furnace,induction furnace,AOD furnace,VOD furnace,etc thermal technology equipment.

2. Non-ferrous Metal industry:

Smelting furnace,refining furnace,reverberatory furnace,converter furnace.

3. Building materials industry:

Cement kiln,glass kiln,ceramic kiln,lime kilns,kiln car,tunnel kiln

4. Energy & Incineration:Coke oven,general boiler,power,generation,boiler,circulating fluidized bed boiler,electric furnace,carbon rosating furnace,waste incinerators.

5. Others: Petrochemical industry furnace.