High alumina brick is an important thermal insulation material on the thermal furnace, high alumina brick price reasonable, excellent production, high fireproof, small bulk density, is a high quality refractory products.
High alumina brick price concessions, the refractory products with high temperature creep, erosion resistance, thermal shock stability and other advantages, suitable for large and medium-sized hot blast furnace.And production technology of high alumina brick and clinker clay brick more 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 ℃.
The refractory of high alumina brick is higher than that of clay brick and semisilicate brick, can reach 1750~1790℃, belong to advanced refractory.Because Al2O3 in high aluminum products is high, less impurity mass, forming less fusible vitreous body, so the softening temperature under load is higher than that of clay brick, but because mullite crystal does not form reticular structure, so the softening temperature under load is still not as high as that of silicon brick.
Al2O3 in this series refractory brick is more, close to the neutral refractory material, high alumina brick price concessions, can resist the erosion of acid slag and alkaline slag, because it contains SiO2, so the ability of alkali slag is weaker than the ability of acid slag.
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