In recent years, with the popularization and application of circulating fluid bed boiler and boiler furnace and other industrial furnaces, so the it is very strict with the property of wear-resistance. In the past, traditional refractory brick, such as clay bricks, high alumina bricks can not meet the needs of circulating fluid bed boiler and boiling furnace. For example, if the clay bricks used in the parts with serious abrasion, the using life only have 3~6 months. In recent years, many domestic and foreign refractory brick manufacturers have developed and produced wear-resistance refractory material. The wear resistance of the product has been greatly improved than that of the ordinary refractory brick. The wear resistance at normal temperature is generally between 5 and 10cm3. It can be seen that the service life of the product is about 1~2 years. Although the quality of the refractory material has been greatly improved in recent years, the performance of the refractory material is not ideal, but it still affects the normal operation of the circulating fluidized bed. Some manufacturers also have high grade refractory materials such as silicon nitride bonded silicon carbide brick, although the wear resistance is very good (around 1.8cm3 at normal temperature), but the price is very expensive. Today, Rongsheng introduces the high strength abrasion resistant refractory bricks recommended for CFB boilers.
Circulating fluidized bed boiler is a new type of boiler with high efficiency and low pollution. In order to prevent grinding and parts from burning, high strength and wear-resistant refractory bricks are used in many parts of the boiler. The concrete parts are mainly in the wind chamber, the combustor, the cyclone separator, the return feeder, the external bed, the tail flue and so on.
High strength and wear-resistant refractory brick is made of silicon carbide, corundum and bauxite as the main refractory aggregate, adding powder, binder and additive, by mixing, mixing, mold librating pouring or high-pressure press machine pressure), drying, heat treatment (200~500 degrees C) or high temperature (1000~1350 degrees C) and finally cooling.
The Advantages of High Strength wear-Resistance Refractory Brick
High mechanical strength at high temperature.
Good Wear-Resistance
Strong Erosion Resistance
The inner lining of the circulating fluidized bed boiler is an important facility to prevent the heat loss and wear of the metal structure of the boiler heating surface and the circulation part of the boiler. If the refractory brick quality is not good, the lining of the boiler will be seriously damaged. The above is the high strength and wear-resistant refractory brick with favorable price and good wear resistance. The utility model can be used for lining of circulating fluidized bed boilers and large boilers, and can prolong the service life of lining lining of boilers.
