M-CZ composites from Egyptian magnesite as a clinker to RCK refractory lining

Processing of magnesia-calcium zirconate (M-CZ) composites as clinker for manufacturing refractory bricks of rotary cement kilns (RCK) were produced from Egyptian magnesite and zirconia. 4.8–24.8wt% of zirconia was added as a modifier to Egyptian magnesite. The mixtures were milled, uni-axially form...

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Bibliographic Details
Published in:Ceramics international 2018-02, Vol.44 (2), p.2274-2282
Main Authors: Ewais, Emad M.M., Bayoumi, Ibrahim M.I., El-korashy, Sabry A.
Format: Article
Language:English
Subjects:
CaO.ZrO2
Mechanical properties
MgO
Refractories
Thermal shock resistance
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Summary:Processing of magnesia-calcium zirconate (M-CZ) composites as clinker for manufacturing refractory bricks of rotary cement kilns (RCK) were produced from Egyptian magnesite and zirconia. 4.8–24.8wt% of zirconia was added as a modifier to Egyptian magnesite. The mixtures were milled, uni-axially formed and fired at 1550°C for 2h. Phase composition, microstructure, physical, mechanical thermal properties and wettability by Portland cement clinker of the obtained specimens were investigated. Addition of 9.8wt% zirconia to Egyptian magnesite gave the highest densification, best homogenous microstructure and the maximum cold crushing strength (174.9MPa). In addition, no free CaO was recorded. This composite can be strongly nominated for lining the RCK.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2017.10.188