期刊
CERAMICS INTERNATIONAL
卷 47, 期 14, 页码 20387-20398出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.04.047
关键词
Electric arc furnace (EAF) slag; Magnesia refractory; Magnesiowustite; Penetration; Interfacial reaction; Fluorspar
资金
- Competency Development Program for Industry Specialists from the Korea Institute for Advancement of Technology (KIAT) [P0002019]
- Korea Institute of Energy Technology Evaluation and Planning (KETEP) - Ministry of Trade, Industry & Energy (MOTIE), Korea [20172010106310]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20172010106310] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
The study investigated the interfacial reaction between CaO-SiO2-FeO-Al2O3-MnO-MgO-xCaF2 type electric arc furnace steelmaking slag and magnesia refractory. It was found that the CaF2 content in the slag affects the thickness of the solid solution layer, and by varying the MgO content in the slag, the depth of refractory dissolution and slag penetration were determined. The study also proposed a critical CaF2 content of approximately 3 wt% that had no significant effect on refractory corrosion.
The interfacial reaction between the CaO-SiO2-FeO-Al2O3-MnO-MgO-xCaF2 (CaO/SiO2 = 0.9-1.2, x = 0-10 wt %) type electric arc furnace (EAF) steelmaking slag and magnesia refractory was investigated. Using a microscopic analysis, the thickness of the (Mg,Fe)O, magnesiowustite solid solution (intermediate) layer at the slag/ refractory interface was measured. The thickness of the solid solution layer is affected by both slag penetration and refractory dissolution. Since the CaF2 in the slag affects the interfacial reaction between the slag and the refractory, it impacts the thickness of the solid solution layer. In addition, the depth of refractory dissolution was determined by changing the MgO content in the slag, and the depth of slag penetration was also quantitatively measured. Through these experiments, the refractory corrosion-protection mechanism by the CaF2-containing EAF slag was identified. Finally, the critical CaF2 content (= approx. 3 wt%), which had no significant effect on refractory corrosion, was proposed.
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