High alumina brick is a kind of refractory material, the main component of this refractory brick is al2o3.

In general, if Al2O3 content is high than 90%, we call it corundum brick. Due to the different resources, the national standards are not completely same, for example in Western countries, the limitation of Al2O3 content is 42% for the high alumina brick. And in China, we separate it into 3 classes: first class, Al2O3 content must be higher than 75%, the second class, the Al2O3 content is from 60%-75%. And the third class, Al2O3 content is from 48%-60%.

The high alumina brick is

Aluminium silicate refractory products with Al2O3 content higher than 48%.

A neutral refractory material with a content of over 48% of alumina.Bauxite or other high alumina raw materials formed and calcined.High thermal stability and fire resistance above 1770℃. Good slag resistance, and it used for lining steelmaking electric furnace, glass furnace, cement converter, etc.

High charge soft, low creep high aluminum brick is an advanced refractory made of special bauxite, electric molten corundum, electric fused molstone as the main raw materials. The product has the advantages of small high temperature creep, strong erosion resistance, good thermal shock stability, and is suitable for large and medium-sized hot blast furnace. It opens up the next successful road for the high quality and high grade imported refractory materials of high quality, and has been included in the national "Spark Plan" project.

According to different resource conditions and product requirements, the following types of raw materials can be used: high bauxite mainly composed of hydraulic alumina minerals (alumina, alumina, etc.), silica minerals (including cyanite, ruby, silica, etc.), synthetic raw materials, such as industrial alumina, synthetic mullite, molten corundum, etc.China is rich in high aluminum vanadium soil resources and excellent quality, mainly distributed in Shanxi, Henan, Hebei, Guizhou, Shandong and other places.The high aluminum-vanadium soil produced is mainly a mixture of primary water alumina stone (Al2O3 H2O) and kaolinite.

It is mainly used for the masonry of blast furnace, hot blast furnace, electric furnace furnace roof, blast furnace, reflective furnace and rotary kiln lining.In addition, the high aluminum brick is also widely used as a flat furnace heat storage lattice brick, pouring system with the plug head, water outlet brick.But the price of high aluminum brick is higher than that of clay brick, so the use of clay brick can meet the requirements.