Status: Need is Open

Real time tracking / Identification of used refractory bricks

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RHI Magnesita is seeking available technologies and solutions to quickly identify different refractory product types after their use in high-temperature applications. This solution will, on the one hand, support manual sorting processes, on the other hand could also ease automated sensor-based sorting.


RHI Magnesita dedicates itself to continuously advance sustainable production of refractory products. Since most primary raw materials by its nature emit CO2 during production, RHI Magnesita plans to massively increase the rate of used secondary raw materials in refractory products to lower the carbon footprint and to conserve natural resources. However, due to the diversity of product types used in linings of individual aggregates, an efficient technology or solution, which allows for a fast sorting of recyclable materials, needs to be established.

The retrieved material, after the breakout of the linings, features soiled surfaces, and single bricks are likely to be partially fragmented. As these products find their application in extreme harsh environments, facing temperatures higher 1200 °C, corrosive media, mechanical stresses and thermo shocks, suitable identification techniques are limited. Marking of the brick’s cold face (T < 900 °C) would be a possible attempt to improve sorting results.





The used product types mainly differ in their chemistry, more precise in their content of MgO, Al2O3, SiO2 and C . Currently, manual sorting mainly depends on the experience of the employee, who differentiates on base of strength needed for cleavage, fracture surface appearance and color.

Key success Criteria
  • The used solution does not affect the product’s refractoriness
  • The used solution allows fast identification of single bricks
  • The used solution allows to differentiate up to eight different product types
  • The used solution is applicable at industrial scale
  • Optional: The used solution allows to identify the material, even if brick is fragmented
Possible Approaches
  • Use of marker materials in the product formulation
  • Heat resistant paints or grooves at cold face
  • Visual image analysis of fractured surfaces
  • Fast chemical analysis of secondary raw materials
Due Date
Mar 15

Client Point of Contact

Juan Rosenzweig
Gallery Moderator(s)
Oliver Worsfold
Request Number
Preferred Collaboration Types
Area of Interest