First, the difference in content

High aluminum bricks are refractory products with Al2O3 content of more than 48%, with high bauxite clinker as the main raw material, soft clay and waste pulp and paper liquid as the binder, and multi-stage particle ratio of mud, by high pressure molding, drying, high temperature firing. According to the Al2O3 content, high-aluminum bricks can be divided into four grades: super high-aluminum bricks, first-grade high-aluminum bricks, second-grade high-aluminum bricks and third-grade high-aluminum bricks. Super high aluminum brick is Al2O3 not less than 80%, the first high aluminum brick is Al2O3 not less than 75%, the second high aluminum brick is Al2O3 not less than 65%, the third high aluminum brick is Al2O3 not less than 55%.

Clay brick is made of clay clinker as aggregate, refractory clay as a binder made of Al2O3 content of 30-48% refractory products. Clay brick is the most widely used refractory material with the longest history. The raw material of clay brick is clay mineral. Natural fireclay can generally be divided into soft clay and hard clay, in the production process of refractory materials, the former after adding water, good plasticity, easy to sintering, more used as a binder; The latter is mostly used as clinker after calcination.

Second, different characteristics

High alumina brick belongs to neutral refractory material

1, high fire resistance. The refractoriness of high aluminum bricks is higher than that of clay bricks and semi-silicon bricks, up to 1750-1790 degrees, which is a high-grade refractory material.

2, load softening temperature. Because high aluminum products Al2O3 is high, less impurity, the formation of fusible glass body is less, so the load softening temperature is higher than clay bricks, the load softening temperature of high aluminum products is generally more than 1420-1550 degrees. However, because the mullite crystals did not form a network structure, the load softening temperature is still not as high as the silicon brick.

3, slag resistance. High aluminum brick Al2O3 more, close to the neutral refractory, can resist the erosion of acidic slag and alkaline slag, because it contains silicon oxide, so the ability of alkali slag is weaker than the ability of acid slag.

4, chemical erosion resistance. High aluminum refractory products resist acid or alkaline slag, metal erosion and oxidation, reduction reaction are very good, and with the increase of Al2O3 content, the reduction of harmful impurities content and enhance.

Clay bricks are mainly weak acid refractory materials

The refractoriness is 1690℃, which is enhanced with the increase of SiO2 content, so it is mostly used as the lining material of acid kiln. According to the bulk density, it can be divided into ordinary clay bricks, low porosity clay bricks, low creep clay bricks.

Third, the common ground of high aluminum bricks and clay bricks:

The production process is basically the same, the standard size is 230*114*65, and different content of firebricks can be customized according to the drawings.

The price of clay brick and high aluminum brick is much different, you should first determine the material of the firebrick you need before buying, and the price of different materials of firebrick is not the same.