期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 44, 期 2, 页码 1267-1288出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2023.09.064
关键词
Microporous alumina-rich spinel; Corrosion behaviour; Immersion method
The corrosion behavior of lightweight refractories by different slags was studied. The lightweight microporous alumina-rich spinel aggregate showed excellent corrosion resistance, forming an isolation layer at the contact interface with the slag.
A lightweight microporous alumina-rich spinel aggregate with a single phase (Mg0.4Al2.4O4) was prepared to fabricate lightweight refractories with guaranteed corrosion resistance. To explore the corrosion behaviour of slags with different compositions, four types of slags were tested and compared with commercial sintered alumina and lightweight corundum-spinel aggregates. The slag corrosion depth of the lightweight microporous alumina-rich spinel aggregates was significantly lower than that of the other two aggregates. The alumina aggregate formed a calcium aluminate isolation layer with a thickness of 100-150 mu m at the interface. The lightweight corundum-spinel aggregate did not form any isolation layer; however, a 50 mu m reaction layer, composing of spinel and calcium aluminate, exists between aggregate and slag. Nevertheless, at the contact interface between the lightweight microporous alumina-rich spinel aggregate and slag, a uniform isolation layer (approximately 50 mu m thick) forms, preventing direct contact and ensuring excellent corrosion resistance.
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