Phase equilibrium,microstructure and properties of some magnesite-chromite refractories |
| |
Authors: | M A Serry A G M Othman L G Girgis W Weisweiler |
| |
Affiliation: | (1) Ceramic Department, National Research Centre, Dokki, Cairo, Egypt;(2) Institute of Chemical Technology, University of Karlsruhe, D-76128 Karlsruhe, Germany |
| |
Abstract: | The effect of phase equilibrium and microstructure of magnesite-chromite batches containing from 0 to 100% Egyptian chrome ore, with intervals of 10%, on their physical properties was studied. The phase equilibrium data were calculated using the phase relationships within the system M-M2S-CMS-MR (M=MgO, S=SiO2, C=CaO, R=R2O3). A computerized electron-probe microanalyser was applied to study the microstructure as well as microchemistry of the fired magnesite-chromite co-clinkers. Some physical and technological properties of the co-clinkered briquettes were also investigated by determining densification parameters, spalling resistance and load-bearing capacity.It is concluded that dense, spalling resistant and refractory magnesite, magnesite-chrome and chrome-magnesite refractories could be produced by co-clinkering of magnesite-chromite batches of 1000, 7030 and 3070 weight ratios, respectively, at 1600 °C. The prepared co-clinkers were subsequently graded, moulded and refired up to 1700 °C in order to obtain direct-bonded bricks. Meanwhile, dense chromite refractories with lower refractory quality could be processed by firing the Egyptian chrome ore up to 1600 °C. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|