Determination of dissolution time of Al2O3 and MgO inclusions in synthetic Al2O3‐CaO‐MgO slags
Determination of dissolution time of Al2O3 and MgO inclusions in synthetic Al2O3‐CaO‐MgO slags
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DOI：
10.1034/j.1600-0692.2003.20631.x
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发表时间：
2003-08
期刊：
影响因子：
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通讯作者：
K. Yi;C. Tse;J. Park;M. Valdez;A. Cramb;S. Sridhar
中科院分区：
文献类型：
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作者：
K. Yi;C. Tse;J. Park;M. Valdez;A. Cramb;S. Sridhar
利用共焦扫描激光显微镜（CSLM）原位研究了CaO-Al 2 O3-MgO合成渣中Al 2 O3和MgO夹杂物的溶解过程。通过解析速率表达式阐明了溶出机制。引入一组参数来区分溶解过程的反应控制和扩散控制。结果发现，而Al 2 O3夹杂物的溶解速率是有限的扩散，MgO的溶解似乎是有限的表面反应。对于Al 2 O3和MgO，溶解速率和表观活化能增加时，渣组成稍微偏离溶解物种的饱和极限在相图中。
The dissolution of Al 2 O 3 and MgO inclusions in synthetic CaO-Al 2 O 3 -MgO slags have been investigated in situ with a confocal scanning laser microscope (CSLM). The dissolution mechanisms were elucidated by using analytical-rate expressions. A set of parameters is introduced to distinguish between reaction control and diffusion control of the dissolution process. It was found that whereas Al 2 O 3 inclusion dissolution rates are limited by diffusion, MgO dissolution appears to be limited by surface reaction. For both Al 2 O 3 and MgO, the dissolution rate and the apparent activation energy increased when the slag composition was slightly shifted away from the saturation limit of the dissolving species in the phase diagrams.