Steel fibres in refractory construction

Steel fibres in refractory construction

Refractory concrete is exposed to frequent temperature changes with high tensile stresses to the material. Due to its stability and machinability, concrete is the ideal material for refractory construction, although it can only take slight drawing stresses. This results in a low standing time for the refractory construction, frequent periods of shut down for repairs and low furnace availability. For achievement of long service life of the refractory lining even at high and changing temperatures, steel fibres are added to the concrete. These fibres are homogeneously distributed in the material and evenly cushion the tensile stress.

In comparison to conventional lining, this extends the service life of the refractory concretes many times, meaning you have fewer repairs, you avoid furnace downtimes, you lower the operating costs and you increase your furnace´s economy. Steel fibres make an essential improvement to the concrete and mortar properties in terms of their support and crack behaviour.

Here are the benefits at a glance:

  • high resistance to thermal shocks
  • high tension-, compression-, tensile bending-, shearing-, impact-, shock- and fatigue strength
  • flexible crack limitation
  • high resistance against bursting
  • high resistance against vibration
  • increased supporting strength for the monolithic cross section