Refractory Materials

Refractory Materials Precise analysis for higher added value in recycling

Refractory materials are used multiple ways in the metal and glass industry, especially in lining ovens and pans. The inorganic, non-metal materials are subject to strong thermal fluctuation in operation and thus often only have a limited service life. After break-out, the fire-proof materials can be grinded and recycled to become new refractory components. This requires, however, a mono-fraction sorting.

BestandteilWertebereichMessgenauigkeit
MgO0 - 100 wt.%1%
Al2O30-100%1%
SiO20-30%5%

Analysis with LIBS

Challenges in the analysis of refractory bricks with spot-focus LIBS systems are the low homogeneity and the partially large graining of the material. FiberLIBS and MopaLIBS systems enable the analysis of the individual broken pieces by statistically summarizing the measured values in a multitude of measurement points on the surface under sampling.
Basing on the analysis data (e.g. content of Al2O3, MgO and SiO2), the user can specify own sorting or quality classes in the system.

Manual Measurement / Sorting

Small volume flows can be sampled and sorted by hand. A hand-held LIBS measurement head is set onto the refractory material to be evaluated. Via a foot switch and pressing the safety measurement tip completely, the measurement starts. The result is shown on a large screen. On the basis of this measurement, the sorting is done e.g. by selecting a chute.
With this procedure, approximately 1 measurement/second can be done.

Automatic Sorting

By integrating a LIBS measurement head into an automated line consisting of supply, separation, surface preparation, analysis, transport and chute units, throughput and reproducibility of the results can be increased significantly compared to the manual procedure.
For the automatic sorting of refractory materials, a throughput of 6-8 t/h is the target.