Knowledge of the condition and
properties of refractory brick on the roof and sidewalls is essential when
assessing the stability and integrity of furnace. Nondestructive testing and
monitoring of the refractory lining would lead to better safety, longer service
life of the vessels, controlled maintenance and increased production. The
equipment surface temperature appears to be a reliable indicator of the
Infrared cameras are a perfect solution
for a contactless monitoring during operation. Visual evaluation, thermal
modelling based on thermal couple readings and mathematical simulations and
infrared thermography are used for thermal insulator thickness estimation.
Non-destructive testing techniques are the preferable methods to provide details
about the condition of existing structures.
As a step towards predictive
maintenance procedure realisation of high temperature equipment, mathematical
modelling of heat transfer in refractory lining has been undertaken. A numerical
model is used for prediction of the wall temperature fields during the operation
depending on wear thickness and used materials. The calculated lining
temperature fields in combination with the results of temperature measurements
can be used to analyse the wear rates of the equipment.
Keywords: ladle refractory lining, infrared thermography, thermal
modelling, numerical modelling, service life