Henan refractory products manufacturer factory supply cement wedge shape high alumina refractory bricks

Henan refractory products manufacturer factory supply cement wedge shape high alumina refractory bricks

High alumina refractory brick, that is, alumina content in 48% or more of an aluminum silicate refractory. Made of bauxite or other raw materials of higher alumina content after molding and calcining. High thermal stability, refractoriness above 1770℃ . Good slag resistance.

It can be classified according to its mineral composition, generally divided into five categories: low Mullite (silystone), Mullite, Mullite- corundum corundum - mullite and corundum .

Usually divided into three categories:

Ⅰ: Al2O3 content of 75% or more;

Ⅱ: Al2O3 content is 60% ~ 75%;

Ⅲ: Al2O3 content is 48% ~ 60%;

One of the important properties of high alumina refractory brick is its structural strength at high temperature. The high temperature creep is also measured to reflect the high temperature structural strength. The results show that the softening temperature of load increases with the increase of Al2O3 content.

For high alumina refractory bricks with Al2O3 content below 70%, the softening temperature under load depends on the amount ratio between the crystalline and liquid phases, which increases with the increase of the amount of mullite. The quantity and properties of liquid phase have obvious influence on the softening temperature under load. Therefore, reducing the content of impurities in the raw material is conducive to improving the softening temperature of load and high-temperature creep.

High alumina refractory brick Features

A. Fire resistance

The fireproof degree of high alumina brick is higher than that of clay brick and semisilicite brick, up to 1750~1790℃, which belongs to senior refractory material.

B.Refractoriness under load

Because Al2O3 is high in high aluminum products, less hybrid mass and less vitreous, the softening temperature of load is higher than that of clay bricks. However, the softening temperature of load is still lower than that of silicon bricks due to the lack of mesh structure formed by mullite crystallization.

C. Slag resistance

There are more Al2O3 in the high alumina brick, which is close to the neutral refractory material and can resist the corrosion of acid slag and alkaline slag. Due to the SiO2 contained in the brick, the ability of alkali slag is weaker than acid slag.

Application of High Alumina refractory Bricks

It is mainly used for lining of blast furnace, hot blast furnace, electric furnace top, blast furnace, reverberatory furnace and rotary kiln. In addition, high alumina firebrick is widely used as open hearth grate brick of regenerative type, plug head of pouring system, nozzle brick and so on.

Difference between heavy high alumina refractory brick and light high alumina refractory brick

The weight of heavy high alumina brick, also called high alumina brick, is many times heavier than that of light high alumina brick. In the process of use, it is not for heat insulation and heat preservation, but more importantly for fire-resistant temperature. It is usually in direct contact with the flame in the kiln during use, so heavy high alumina brick usually has the function of high temperature resistance. Select high bauxite clinker combined with refractory clay, according to the multi-stage batching, press molding, high temperature burning. The high alumina brick is divided into three grades according to the alumina content. The alumina content and high temperature resistance of the high alumina brick are guaranteed by adjusting the ratio of high alumina clay to the combined clay.

Henan refractory products manufacturer factory supply cement wedge shape high alumina refractory bricks

Henan refractory products manufacturer factory supply cement wedge shape high alumina refractory bricks

Packaging of wedge shape high alumina bricks

1.on wooden pallets with plastic cover: wooden pallet size :930*930 or 1000*1000mm,
2.Load weight of each pallet: 1.5-2.0 tons,

Shipping of wedge shape high alumina bricks

1.Our packaging is as per customer’s request
2.Normal goods delivered by sea transport
3.Sample shipping by express
4.We will shipping and delivery goods timely, quality and quantity guaranteed, and also in accordance with the contract and customer's requirement completely.

Henan refractory products manufacturer factory supply cement wedge shape high alumina refractory bricks