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 high alumina brick compares clay brick and the fireproof of half silicon brick wants tall, reach 1750~1790℃, belong to advanced fireproof material, fireproof is taller, the performance is better, the price is opposite also can weighted rise.
Because Al2O3 is high in high aluminum products, mixed mass is less, the formation of fusible vitreous body is less, so the softening temperature under load is higher than that of clay bricks, but because mullite crystals do not form a network, the softening temperature under load is still not as high as that of silicon bricks.
High alumina refractory brick Al2O3 more, close to the neutral refractory, can resist acid slag and alkaline slag erosion, because it contains SiO2, so the ability to resist alkaline slag is weaker than the ability to resist acid slag. This series of refractory bricks are mainly used for lining blast furnace, hot blast furnace, electric furnace, blast furnace, reverberatory furnace and rotary kiln. In addition, high aluminum brick is also widely used as open hearth regenerative lattice brick, pouring system with plug head, shuikou brick. But the price of high alumina refractory brick wants to be taller than clay brick, reason can satisfy the place that asks with clay brick need not use high aluminium brick.
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