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Refractory material is an essential lining material in industrial furnace. In the continuous progress of science and technology, furnace updates from generation to generation which leads to the production process of refractory materials greatly improved. And these improvements are mainly around in the refractoriness, fire resistance, slag resistance, anti stripping and other aspects. Meanwhile, the types and applications of refractory materials have a variety of changes.

Most of the refractory materials are composed of multi elements and materials which have different melting point, when the temperature reaches a certain degree, the liquid phase is appeared at first, with the temperature continuous rising, the materials are completely fused, and so it is a gradual process. The so-called different material brick refers to the main content of the brick, for example, the raw materials of clay refractory materials are mainly clay, and high alumina brick defines the level according to the level of aluminum content.

Refractoriness of zircon brickrefers to the property that refractory’s multiphase reaches to a specific softening degree when at high temperature without any load, which shows the ability of resistance to high temperature. It is a basic scale to measure the ability of resistance to high temperature and basic technical index to show its high temperature property. Meanwhile, refractoriness is an important index to judge whether this refractory product is suitable to buyer’s high temperature furnace. One thing we need to know is that only if the refractoriness of Inorganic non metallic materials up to 1500℃ can be called refractory material.

Below refractoriness are for some common refractory materials:

1. clay brick: 1610～1750℃
2. silica brick：690～1730℃
3. high alumina brick：＞1770～2000℃
4. magnesia refractory：＞2000℃
5. zircon brick: ＞1630～1680℃