There are many kinds of firebrick, high alumina brick is one of them, belongs to a kind of neutral refractory, in alumina content of 48%. With high stability and slag resistance, it is mainly used in cement rotary furnace, glass furnace, masonry steelmaking furnace and so on. Below we will understand the characteristics and advantages of refractory high alumina bricks, welcome to consult.
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. 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. There are more Al2O3 in the refractory high alumina bricks, 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.
What are the characteristics of high alumina refractory brick? I think you already know this question. High aluminum brick performance is very good, there are many uses, usually used in blast furnace, reverberatory furnace, masonry blast furnace, hot blast furnace, electric furnace top and so on, in general, the requirements are not very high, the choice of clay brick can, high aluminum brick as your requirements a little higher choice.
High charge soft, low creep high alumina brick is made of super grade alumina, fused corundum and fused mullite. The product has the advantages of high temperature creep smaller, strong corrosion resistance, good thermal shock stability and so on. High thermal stability, refractoriness above 1770℃. Good slag resistance, used for lining steelmaking furnace, glass furnace, cement converter, etc. Production technology of the series of refractory brick and clinker clay bricks are similar, the difference is that the ingredients in the clinker ratio is higher, can be as high as 90 ~ 95%, before breaking the clinker grading sorting and screening in addition to iron, firing temperature is higher, such as Ⅰ, Ⅱ high alumina brick with tunnel kiln firing when the general is 1500 ~ 1600 ℃.
Refractory high alumina bricks is mainly used for lining of blast furnace, hot air furnace, electric furnace top, blast furnace, reverberatory furnace and rotary kiln. In addition, high alumina brick is widely used as open hearth grate brick, plug head used in pouring system and water mouth brick. But the price of high alumina brick is higher than that of clay brick, so it is unnecessary to use high alumina brick where the clay brick can meet the requirements.
