| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Preparation of Spinel-Periclase-Calcium Aluminate Refractory Used in Transitional Zone of Cement Rotary Kiln |
| ZUO Bin, YIN Hongfeng*, LIU Yun, XIN Yalou, LIU Yuchi, YUAN Hudie*
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| College of Materials Science and Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China |
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Abstract The transitional zone of cement rotary kiln has a high surface temperature and large heat dissipation loss due to the difficulty to form the kiln skin and the high thermal conductivity of the refractory used. In this work, spinel-calcium aluminate multiphase lightweight aggregates were synthesized from magnesite, dolomite and industrial alumina, and spinel-periclase-calcium aluminate refractories were fabricated by using synthesized materials as aggregate and sintered magnesia fine powder as the matrix. With the help of scanning electron microscope, X-ray diffractometer and other means, the effects of phase composition of synthetic raw materials on their physical properties at room temperature, refractoriness under load and corrosion resistance of cement materials were investigated. The results show that spinel-aluminate mulitiphase lightweight refractory materials with low water absorption can be synthesized by using magnesite, dolomite and alumina as raw materials fired at 1 650 ℃ for 4 h. The synthetic spinel-calcium aluminate multiphase material can be used as aggregate to prepare spinel-periclase-calcium aluminate refractory with higher compressive strength at room temperature due to thier good combination between synthetic aggregate and magnesia matrix. Spinel-periclase-calcium aluminate refractory can be used in the transition zone of cement rotary kiln due to its good corrosion-resistance to cement.
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Published: 25 June 2024
Online: 2024-07-17
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| Fund:National Natural Science Foundation of China (51572213). |
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2024, Vol. 38 
