What is the effect of steel fiber added to refractory castables:
1.Enhance the toughness of refractory castables.
2.Enhance the wear resistance of refractory castables.
3. Improve the mechanical impact resistance of refractory castables.
4. Improve the thermal shock stability of refractory castables, which is also the main function.
The critical point temperature for adding steel fibers to refractory castables is 1350°C. If the castable is used to zones with service temperature exceeds 1350°C, it will not be able to play its due role,so need steel fibers need to be added. Like some castables used for parts exceeding 1400°C, there is no need to add steel fibers. Not only does it have no good effect, but it increases the cost of the castable. Refractory castable with steel fiber reinforced could be used for parts like the front and rear kiln mouths of cement rotary kiln, lime rotary kiln, and pellet rotary kiln etc.. Because there are many castings at the front and rear kiln mouths, refractory bricks cannot be used for masonry. Steel fiber reinforced refractory castable is more suitable. The material is not only tensile and compressive, but also fatigue-resistant and wear-resistant.
Steel fiber is not only suitable for refractory castables, but also suitable for refractory plastics and high temperature ramming materials. Adding an appropriate amount of steel fiber to the plastic and ramming material can improve the resistance to cracking and peeling. Moreover, during the maintenance process, adding steel fibers can reduce the linear shrinkage of castables, plastics and other unshaped refractory materials. The addition of steel fiber should be appropriate, internal changes in the refractory castable might be caused if too much steel fiber is added. When the refractory castable is sintered at high temperature, if too much fiber added, the expansion coefficient will increase and the thermal conductivity will also increase. Especially during construction, too much steel fiber will cause unnecessary trouble to the construction.
There are many kinds of refractory castables with steel fibers, such as high alumina steel fiber castables, corundum steel fiber castables, mullite steel fiber refractory castables, and silicon carbide steel fiber refractory castables. These are composite Type of refractory castable. The proportion of steel fiber added can be adjusted according to the usage.
