Performance index of silica hot repair refractory

The material is a kind of plastic unshaped refractory material, its main component is SiO2, it is made of special clinker and various binders and additives, and it is processed by special technology. Its main physical and chemical properties are as follows:

①Maximum temperature≥1700℃;

②Refractoriness≥1750

③ load softening point ≥ 1710 ℃;

④Pressure strength, (drying at 110℃)≥30MPa; (after drying at 1450℃)≥35Mpa;

⑤Line change rate, (1450℃, 3h)≤0.20%;

⑥True density, 2.33g/cm3;

⑦Use density, 2300g/cm3;

⑧ Apparent porosity, ≤22%.

The main performance characteristics of silica hot repair refractory are as follows:

①Excellent high temperature resistance, refractoriness, load softening temperature and other high temperature indicators are better than high-quality silica bricks.

②It has good corrosion resistance to glass and alkali dust.

③It is processed by a special process. After sintering, the product has a dense structure, low porosity, strong thermal vibration resistance and high temperature volume stability. Therefore, it will not explode and collapse during hot repair, nor will it be caused by SiO2 crystals. The type transformation produces bursts and damages the repaired structure.

④The siliceous hot filling material is plastic mud-like at room temperature, which can be arbitrarily shaped. It hardens immediately after being heated, and is firmly bonded with the original brick. the whole frame.