Characteristics of Magnesium-iron-aluminium Composite Oxides and Their Influence on Properties of Magnesia-based Bricks

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Characteristics of Magnesium-iron-aluminium Composite Oxides and Their Influence on Properties of Magnesia-based Bricks

LIAO Yuchao, WANG Xinchao, ZHANG Wei, HE Zizhan, FAN Qingsong, FU Qiuhua

Beijing Science and Technology R&D Center of Puyang Refractories Group Co., Ltd., Beijing 101318, China

Published:2015-06-17

Abstract

Abstract: The composition, structure and micro-morphology of magnesium-iron-aluminum composite oxides were investigated using various methods such as XRF, SEM, EDS, XRD and KMnO₄-titration. Compared to hercynite, the composite oxide s have completely different phases including solid solution (MgO)_0.77(FeO)_0.23, composite spinel MgFe_0.2Al_1.8O₄ and a small amount of MgFe₂O₄. The composite oxides exhibit excellent corrosion resistance to cement clinker and potassium salts. The products produced by magnesite and the composite oxides show better performance than magnesia-hercynite bricks, especially the corrosion resistance and thermal shock resistance.

Key words: magnesium-iron-aluminium composite oxides, solid solution, thermal shock resistance

LIAO Yuchao, WANG Xinchao, ZHANG Wei, HE Zizhan, FAN Qingsong, FU Qiuhua. Characteristics of Magnesium-iron-aluminium Composite Oxides and Their Influence on Properties of Magnesia-based Bricks[J]. .

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Characteristics of Magnesium-iron-aluminium Composite Oxides and Their Influence on Properties of Magnesia-based Bricks

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