Microstructure and Mechanistic analysis of high-calcium fused magnesia molten heap

IF 1.8 4区 材料科学 Q2 MATERIALS SCIENCE, CERAMICS Journal of the Australian Ceramic Society Pub Date : 2024-09-04 DOI:10.1007/s41779-024-01061-3
Xin Zhao, Jiegang You, Jingjing Yue, Xudong Luo, Beiyue Ma
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Abstract

To study the significant influence of the microstructure of high-calcium fused magnesia on MgO-based refractories products. The chemical composition, microstructure, phase composition, and densification of the high-calcium fused magnesia with the selected locations were studied. The results revealed that the high-calcium fused magnesia at the core of the furnace bottom and middle of the electrode had the highest MgO content and the content of various impurities is the least. The bond phase is dicalcium silicate (C2S) and a low melting point silicate phase, and a certain amount of srebrodolskite appears in the upper layer of the molten heap. The longitudinal position from the top to the bottom of the grain size first becomes small and then large. In the horizontal position from the inside to the outside of the grain size firstly becomes large and then small, whose the largest grain size being 938μm. At the bottom of the furnace core of the bulk density is the largest, reaching 3.57g/cm3, the lowest porosity of 1.05%.

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高钙熔融氧化镁熔堆的微观结构和机理分析
研究高钙熔融氧化镁的微观结构对氧化镁基耐火材料产品的重要影响。研究了选定位置的高钙熔融镁砂的化学成分、微观结构、相组成和致密性。结果表明,炉底核心和电极中部的高钙熔融氧化镁中氧化镁含量最高,各种杂质含量最少。结合相为硅酸二钙(C2S)和低熔点硅酸盐相,熔堆上层出现一定量的苏氏闪长岩。纵向位置从上到下晶粒尺寸先变小后变大。横向位置从内到外晶粒尺寸先变大后变小,最大晶粒尺寸为 938μm。炉心底部的体积密度最大,达到 3.57g/cm3,孔隙率最低,为 1.05%。
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来源期刊
Journal of the Australian Ceramic Society
Journal of the Australian Ceramic Society Materials Science-Materials Chemistry
CiteScore
3.70
自引率
5.30%
发文量
123
期刊介绍: Publishes high quality research and technical papers in all areas of ceramic and related materials Spans the broad and growing fields of ceramic technology, material science and bioceramics Chronicles new advances in ceramic materials, manufacturing processes and applications Journal of the Australian Ceramic Society since 1965 Professional language editing service is available through our affiliates Nature Research Editing Service and American Journal Experts at the author''s cost and does not guarantee that the manuscript will be reviewed or accepted
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