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High alumina brick

LMM YOTAI PRODUCT

LMM TOTAI offer a complete product and service portfolio for all steelmaking processes.
From basic and non-basic bricks and mixes, slide gate plates, isostatic products and prefab components to special machinery, mechanisms and repair systems.

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High alumina brick is a kind of refractory material, and the main component of this refractory brick is Al2O3.
If the Al2O3 content is higher than 90%, it is called corundum brick. Due to different resources, the standards of different countries are not completely consistent. For example, European countries stipulate that the lower limit of Al2O3 content for high alumina refractories is 42%. In China, high alumina bricks are usually divided into three grades according to the Al2O3 content in them: Grade I – Al2O3 content >75%; Grade II – Al2O3 content is 60-75%; Grade III – Al2O3 content is 48-60%.

High-alumina-brick

Characteristics
a. Refractory
The refractoriness of high alumina bricks is higher than that of clay bricks and semi-silica bricks, reaching 1750~1790℃, and is a high-grade refractory material.
b. Load softening temperature
Because high alumina products contain high Al2O3, low impurities, and less fusible glass, the load softening temperature is higher than that of clay bricks, but because mullite crystals do not form a network structure, the load softening temperature is still not as high as that of silica bricks.
c. Slag resistance
High alumina bricks contain more Al2O3, which is close to neutral refractory materials and can resist the erosion of acidic slag and alkaline slag. Because they contain SiO2, their ability to resist alkaline slag is weaker than that of acidic slag.

Use
Mainly used for masonry of blast furnaces, hot blast furnaces, electric furnace roofs, blast furnaces, reverberatory furnaces, and rotary kiln linings. In addition, high alumina bricks are also widely used as open-hearth heat storage checker bricks, plugs for pouring systems, and nozzle bricks.

LMM YOTAI established in 2007. Our production technology comes from Japanese Yotai. As an experienced and international player in the refractories industry. We have succeeded in expanding both the breadth of its product range and the depth of its services. From raw material selection, refractory portofio & optimization, installation & services & recycle of used refractories on site to further reduce client’s Opex & Capex in refractory consumption per ton steel output, meanwhile improve product quality of client.

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