Szczegóły publikacji
Opis bibliograficzny
Influence of magnesium aluminate spinel on the thermomechanical properties of alumina-spinel castables / Karina TYRAŁA, Jakub RAMULT, Ryszard PROROK, Dominika MADEJ // W: UNITECR 2019 [Dokument elektroniczny] : 16th biennial worldwide congress : Unified International Technical Conference of Refractories : 13th to 16th October, 2019, Yokohama, Japan : proceedings. — Wersja do Windows. — Dane tekstowe. — Japan : Technical Association of Refractories, [2019]. — S. 266–270. — Wymagania systemowe: Adobe Reader. — Tryb dostępu: http://unitecr2019.org/files/UNITECR2019_Proceedings.pdf [2019-10-14]. — Bibliogr. s. 269–270, Abstr. — Dostęp po zalogowaniu
Autorzy (4)
Słowa kluczowe
Dane bibliometryczne
| ID BaDAP | 125228 |
|---|---|
| Data dodania do BaDAP | 2019-10-18 |
| Rok publikacji | 2019 |
| Typ publikacji | materiały konferencyjne (aut.) |
| Otwarty dostęp |  |
Abstract
Thanks to its good mechanical properties at high temperatures and low coefficient of thermal expansion, spinel (MgAl2O4) containing refractory castables are nowadays widely used as thermal devices of the metallurgical industry. Preformed and in situ spinel containing castables exhibit higher thermal shock resistance and thermomechanical properties in comparison to pure alumina refractories. The in situ spinel formation leads to a volumetric expansion even up to 8 % which is why to improve the flowability and volumetric stability, microsilica is used. The aim of our work is to compare the thermomechanical behaviour of alumina-based spinel-forming and spinel-containing castables. The coarser fractions and the aggregate fines of presynthesized spinel were used. The coarser fractions add thermal shock and corrosion resistance and the aggregate fines optimize the particle size distribution and increase the refractoriness of the product. Corundum-spinel castables were characterized in terms of bulk density, apparent porosity, thermal shock resistance, and refractoriness under load (RUL). All samples were also investigated using XRD and SEM-EDS techniques. Spinel phase content and its performance affects physicochemical and thermomechanical properties of refractory ceramics belonging to the Al2O3-MgOSiO2 system. The presented work fits within the most significant current research trends of cement free castables for steel industry applications.
