Henan Yutai High Temperature New Material Technology Co., Ltd.

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Steelmaking auxiliaries

Amorphous refractories

Firebrick

Steelmaking auxiliaries

Amorphous refractories

Firebrick

High alumina bricks

High-alumina bricks refer to silicon-aluminum refractory bricks with an aluminum content of ≥48%. High-alumina bricks are widely used in blast furnaces, hot blast furnaces, electric furnaces, anode roasting furnaces, molten iron ladles, rotary kilns, glass kilns and other high-temperature kilns, with a wide range of types, common high-alumina bricks are ordinary high-alumina bricks, low-creep high-alumina bricks, mullite bricks, andalusite bricks.

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Product description

High-alumina bricks refer to silicon-aluminum refractory bricks with an aluminum content of ≥48%. High-alumina bricks are widely used in blast furnaces, hot blast furnaces, electric furnaces, anode roasting furnaces, molten iron ladles, rotary kilns, glass kilns and other high-temperature kilns, with a wide range of types, common high-alumina bricks are ordinary high-alumina bricks, low-creep high-alumina bricks, mullite bricks, andalusite bricks.

High Alumina Brick products

Ordinary high-alumina bricks

The main raw material of ordinary high-alumina bricks is bauxite clinker, and the current production process of high-alumina bricks is mature, and a good high-alumina brick mainly depends on the quality of raw materials, and the quality of bauxite depends on its sintering temperature. Therefore, the sintering temperature of refractory materials is a very important indicator.

Ordinary high-alumina bricks can be roughly divided into three categories,

Grade 3 high-alumina brick with Al2O3 content of 48-60%

Grade 2 high-alumina brick with Al2O3 content of 60-75%

First-class high-alumina bricks, with an Al2O3 content of more than 75.

The load softening temperature of ordinary high-alumina bricks is 1420-1550 degrees, which increases with the increase of aluminum content. When the aluminum content is less than 70%, the load softening temperature increases with the increase of the number ratio of mullite phase and liquid phase, and the number and properties of the liquid phase have a significant impact on the load softening temperature, so reducing the impurity content in the raw material is conducive to improving the load softening temperature and high temperature creep, when the aluminum content is greater than 70%, with the increase of aluminum content, the load softening temperature does not increase significantly.

The thermal shock stability of ordinary high-alumina bricks mainly depends on the chemical mineral composition and microstructure. Generally worse than clay products. Ordinary high-alumina bricks have good acid and alkali resistance, metal erosion and redox reactions, and the indicators are as follows

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Silica bricks

Mullite Insulation Brick

Silica bricks

Mullite Insulation Brick

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