1.Ceramic fiber material
Ceramic fiber products can meet the requirements of different temperature grades from 1100℃ to1430 ℃. That is to say, it fully meets the requirements of the cracking furnace for the use of ceramic fiber products. Zirconium containing ceramic fibers in the form of layers and folded modules have become the mainstream idea of domestic cracking furnace design.
2. Light high alumina refractory brick
The lightweight high alumina refractory brick has a higher alumina content than, and has good high-temperature structural strength and slag erosion resistance. It is the most traditional design of cracking furnace lining. From the perspective of service life, if there is no brick itself and construction quality problem, the brick lining is the most durable and relatively economical structure among the refractory materials selected for the cracking furnace. Especially in the places where the flow velocity of flue gas is high or the flame scours, the effect is remarkable. In the cracking furnace, the light high alumina refractory brick shall be used in combination with the ceramic fiber as the backing no matter whether it is dry masonry construction or refractory slurry wet masonry construction. With the large-scale design of cracking furnace, the application scope of light high alumina refractory brick in furnace lining is gradually narrowing.
3. Lightweight refractory castable
Lightweight refractory castable is a kind of traditional refractory and thermal insulation material, which is composed of aggregate, binder and some additives for typical wet brick lining structure. Light refractory castables with different temperature grades are applied to the convection section and furnace bottom of ethylene cracking furnace respectively. It can be used alone or in combination with other materials. Simple construction, low cost and good overall performance. However, the castable shall be cured after construction, and the oven drying shall be conducted for a certain time before use, and hot spots are easy to occur at the anchor parts.
