Non-destructive measurement of residuary brick thickness
With the StratoTest 4500C brick thickness measuring device by ElektroPhysik, the residual brick thickness of refractory linings in rotary kilns in the cement and concrete industry can be determined extremely quickly and precisely. The non-destructive, electromagnetic measuring method helps operators of cement plants to reduce time and cost of measurements considerably. Kiln downtimes are significantly reduced by reducing the number of boreholes from up to 200 to just one borehole.
With the StratoTest 4500C, the lining thickness of cement, dolomite, magnesite or fireclay bricks in the rotary kiln can be determined very quickly and without great effort. For this purpose, the StratoTest uses a plate-shaped eddy current probe with a diameter of 33 cm. When this measuring probe approaches the metal kiln shell, which serves as a measuring reflector, the electrical probe values change depending on the distance. The electromagnetic measuring method then displays exactly the mean value of all thickness values in the probe’s area of measurement. The battery-operated measuring device is extremely user-friendly. The handle of the 1860 g probe can be extended to a length of up to 145 cm and is thus individually adjustable.
Electromagnetic measurement principle
To carry out the measurement, a single test hole is drilled in the kiln section to assess the structure and condition of the bricks and the masonry. Furthermore, the height of the bricks up to the steel casing can be determined by means of the borehole. The measuring probe of the StratoTest 4500C is then placed at the drilling point and adjusted to the existing stone thickness by means of the individual calibration option of the gauge. Then, the entire lining can be measured. The electromagnetic measuring method of the StratoTest ensures fast and user-friendly measurement with high accuracy of up to 3% of the measured value. Besides, StratoTest 4500C measures without damage to the lining or any danger for the user.
Exact documentation and reproducibility
The control unit of the StratoTest 4500C can be connected to a PC or laptop via cable or wireless via Bluetooth. All measuring data obtained can be read out as a CSV file and processed directly for documentation purposes.