Features of Magnesium Aluminum Spinel Brick for Cement Kiln

To solve the problem of environmental pollution, caused by magnesia-chrome brick, used in cement kilns, alkaline products were developed, chromium-free, and magnesium-aluminum spinel brick and magnesium-iron spinel brick can give very good results when used in cement kilns.

Introduction of magnesia alumina spinel brick

Magnesia-alumina spinel brick is made from magnesia-alumina spinel ((MgAl2O4, abbreviated MA)) as a matrix using high quality high purity magnesia and ore, containing Al2O3, by dosing, mixing, blank manufacturing, drying, roasting and other processes. Basic fireproof products.

Application of magnesium aluminum spinel brick

Known for its best resistance to thermal shock, than magnesia brick, it is widely used in cement rotary kilns for masonry, lime rotary kilns, open hearth furnaces, roofs of electric furnaces, etc.. Due to the characteristics of Alcoa spinel brick, it is widely used as masonry materials for high temperature smelting furnace roofing., such as large cement kilns and copper reverberatory kilns, due to which the effect of extending the service life of the furnace is achieved.

Features of magnesia-alumina-spinel brick

1. Magnesium aluminum spinel brick has good thermal shock resistance, withstands water cooling for 20-25 times and can withstand air cooling more than 100 times or even more. This is its most noticeable advantage, much better, than ordinary magnesia bricks.
2. The characteristics of magnesium-aluminum spinel brick are also slightly higher, than magnesia brick. Due to the higher melting point of the magnesia-alumina spinel itself, the softening temperature of magnesia-alumina bricks is improved compared to magnesia bricks, reaching 1650 ~ 1700 ℃
3. The ability of magnesium-aluminum spinel to protect periclase particles from slag erosion is higher, than that of calcium-magnesium olivine, Therefore, the ability of magnesium aluminum spinel bricks to resist alkali slag and iron oxide slag is better, than magnesia bricks.

Why magnesia-alumina spinel bricks have good thermal shock resistance?

Magnesia-alumina spinel bricks are resistant to thermal shock, since magnesia-alumina spinel, and periclase belong to the cubic crystal system, and thermal expansion along each direction of the crystal axis is the same, therefore expansion and contraction are relatively uniform as temperatures fluctuate. Creates less thermal stress.