Chemical and physical indexes of the outlet flue of cyclone tube for refractory and wear-resisting heat preservation material of circulating fluidized bed boiler

Alumina is 50

Silicon powder 5

The steel powder

30

Additives for 15

Fire resistance >1500℃;Volume density: 2.7g/cm3;

Normal temperature compressive strength >120Mpa;

Normal temperature bending strength >10 Mpa;Wear < 8 cc

Change rate of reburning line is 0.2%.

Maximum operating temperature 1500℃;

4 years

The above

Divided into three layers:

1. High-strength wear-resisting castable, the main raw materials are :(1) bauxite aggregate, which plays a fire-resistant role;(2) corundum powder plays an wear-resisting role.

Two, lightweight insulation castable, composed of floating beads and bauxite aggregate, to play a role in fire insulation.

Three, aluminum silicate fiberboard, the same as the cyclone separator return material legs