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Which chemicals will affect refractory ceramic fibers?

Categories: FaqStars: 3Stars Visit: - Release time: 2022-12-07 16:00:00
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     Chemicals that can corrode refractory ceramic fibers include fluorine, fluoride, vanadium and other heavy metals, phosphoric acid, strong alkali, etc.

     (4) Alkali erosion.

     The corrosion of alkali on refractory ceramic fibers is considered to be mainly determined by two factors: time and temperature. The alkali metal reacts with the fiber to form a low melting compound, which makes the fiber shrink or sinter, and finally leads to the damage of the fiber lining. The presence of chemical substances such as V203, S03, etc. will accelerate this damage behavior and cause the furnace lining damage earlier. Alkali erosion generally occurs on the hot surface of the fiber lining and forms a hard shell or "slag" layer after reaction. With the deepening of the reaction, the fiber surface is destroyed and loses its function, and the new surface is exposed to continuous chemical attack.

     (5) Other acid erosion.

     Refractory ceramic fibers are generally considered to have good resistance to hydrochloric acid (HCI), acetic acid (CH3COOH) and nitric acid, and can resist the corrosion of phosphoric acid at low temperatures. However, when aluminum phosphate is formed at high temperature, the fiber will shrink significantly. When the temperature is higher than 540 ° C, the refractory ceramic fibers should be avoided to contact phosphoric acid.

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