Investigation of the influence of impurities typical in secondary raw materials on the behavior of high alumina castables – Part 1: Design of the castables, setting properties and high temperature fracture behavior
Laura Erbar,
Katharina Sarnow,
Olaf Krause,
Erwan Brochen,
Christian Dannert,
Jacek Podwórny,
Karolina Dudek,
Robert Kusiorowski
Affiliations
Laura Erbar
Koblenz University of Applied Sciences, Rheinstraße 56, 56203, Höhr-Grenzhausen, Germany; Corresponding author.
Katharina Sarnow
Koblenz University of Applied Sciences, Rheinstraße 56, 56203, Höhr-Grenzhausen, Germany
Olaf Krause
Koblenz University of Applied Sciences, Rheinstraße 56, 56203, Höhr-Grenzhausen, Germany
Erwan Brochen
Forschungsgemeinschaft Feuerfest e. V. at the European Centre for Refractories, Rheinstraße 58, 56203, Höhr-Grenzhausen, Germany
Christian Dannert
Forschungsgemeinschaft Feuerfest e. V. at the European Centre for Refractories, Rheinstraße 58, 56203, Höhr-Grenzhausen, Germany
Jacek Podwórny
Łukasiewicz - Institute of Ceramics and Building Materials, Refractory Division, ul, Toszecka 99, 44-100, Gliwice, Poland
Karolina Dudek
Łukasiewicz - Institute of Ceramics and Building Materials, Refractory Division, ul, Toszecka 99, 44-100, Gliwice, Poland
Robert Kusiorowski
Łukasiewicz - Institute of Ceramics and Building Materials, Refractory Division, ul, Toszecka 99, 44-100, Gliwice, Poland
The research was carried out using a primary high alumina raw material that was selectively spiked with typical elements found in secondary raw materials. These artificially spiked raw materials were processed into cement-free high alumina monolithics by 1:1 substitution of the corresponding high alumina matrix fraction in the formulation. Regardless of the impurity, the rheology and setting behavior of the developed model refractory castables showed a very high degree of comparability with the reference material. The same workability allowed the production of comparable test pieces for hot wedge splitting tests. The effects on high temperature fracture behavior observed in this study can therefore be attributed solely to the impurities.
