Growth of spinel crystals in vanadium slag and their characterization

被引：38

作者：

Diao, Jiang ^{[1
]}

Xie, Bing ^{[1
]}

Ji, Chengqing ^{[1
]}

Guo, Xu ^{[1
]}

Wang, Yonghong ^{[1
]}

Li, Xiaojun ^{[1
]}

机构：

[1] Chongqing Univ, Coll Mat Sci & Engn, Chongqing 400044, Peoples R China

来源：

CRYSTAL RESEARCH AND TECHNOLOGY | 2009年 / 44卷 / 07期

关键词：

morphology; grain size; growth; spinel; vanadium slag; IRON SPINELS; OXIDATION;

D O I：

10.1002/crat.200900131

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Morphology of vanadium slags were investigated by scanning electron microscopy (SEM). The mineralogical phases were characterized by energy disperse X-ray spectrometry (EDS) and powder X-ray diffraction (XRD). The obtained results show that spinels and silicates are the major phases in the vanadium slag, and V is concentrated in FexV3-xO4 and Mg-x(V, Ti)(3-x)O-4. Both the spinel grain size and volume fraction in the slag with higher V content are much larger than that with lower V content. (Fe, Mn)(2)SiO4 and (Fe, Mn)SiO3 have a higher proportion in the slag with lower V2O3 and higher SiO2 content. The relation among cooling conditions and grain size and volume fraction of spinels is also discussed. It is found that low cooling rate and long holding time benefit spinel crystal growth, especially for the interval of 1200-1250 degrees C. Both mean diameter and volume fraction of spinels could achieve or exceed the industry vanadium slag when holding more than 45 min. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：707 / 712

页数：6

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