钒渣中化学组元对元素分布、物相和钙化提钒过程的影响

余唐霞; 姜涛; 温婧; 孙红艳; 李明; 彭毅

doi:10.1007/s12613-021-2334-y

Volume 29 Issue 12

Dec. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(12): 2144-2151

Tangxia Yu, Tao Jiang, Jing Wen, Hongyan Sun, Ming Li, and Yi Peng, Effect of chemical composition on the element distribution, phase composition and calcification roasting process of vanadium slag, Int. J. Miner. Metall. Mater., 29(2022), No. 12, pp. 2144-2151. https://doi.org/10.1007/s12613-021-2334-y

Cite this article as:

Tangxia Yu, Tao Jiang, Jing Wen, Hongyan Sun, Ming Li, and Yi Peng, Effect of chemical composition on the element distribution, phase composition and calcification roasting process of vanadium slag, Int. J. Miner. Metall. Mater., 29(2022), No. 12, pp. 2144-2151. https://doi.org/10.1007/s12613-021-2334-y

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研究论文

钒渣中化学组元对元素分布、物相和钙化提钒过程的影响

1)
钒钛资源综合利用国家重点实验室, 攀枝花617000, 中国
2)
东北大学冶金学院, 沈阳110819, 中国
3)
多金属矿教育部重点实验室, 沈阳110819, 中国
4)
辽宁省冶金传感器材料及技术重点实验室, 沈阳110819, 中国

通讯作者:
姜涛 E-mail: jiangt@smm.neu.edu.cn

温婧 E-mail: wenjing@smm.neu.edu.cn

文章亮点

(1) 系统地比较了七种不同钒渣的微观形貌和物相。

(2) 探究了钒渣中不同化学组元对钒渣元素分布和物相的影响。

(3) 研究了不同化学组元对钒渣钙化提钒过程的影响。

中文摘要

钒渣中的化学组成对其元素分布和物相组成有重要影响，而物相组成又影响着后序钙化焙烧以及钒的浸出。本文以来自中国不同地区的七种钒渣为原料，使用电子扫描电镜、X射线衍射仪和电感耦合等离子体发射光谱仪，研究了不同组元对钒渣中元素分布、物相组成、钙化焙烧和主要元素浸出率的影响。结果显示：七种钒渣中硅酸盐相均包裹在尖晶石相周围，尖晶石相主要元素从内到外分别为Cr、V和Ti，低铬钒渣的尖晶石相尺寸大于高铬钒渣，高钙高磷钒渣中尖晶石相更为弥散。随着Cr含量增加，含钒尖晶石的最强峰向大角度偏移，且钙化焙烧后有(Fe_0.6Cr_0.4)₂O₃形成。高钙高磷钒渣中过量的Ca与Si生成了Ca₂SiO₄。V浸出率在部分钒渣中超过88%，Cr浸出率均低于5%，Si浸出率在高钙高磷钒渣中高于其他钒渣，Mn浸出率均超过10%，Fe和Ti浸出率较小可忽略。

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Research Article

Effect of chemical composition on the element distribution, phase composition and calcification roasting process of vanadium slag

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Abstract

Abstract

The chemical composition of vanadium slag significantly affects its element distribution and phase composition, which affect the subsequent calcification roasting process and vanadium recovery. In this work, seven kinds of vanadium slags derived from different regions in China were used as the raw materials to study the effects of different components on the vanadium slag’s elements distribution, phase composition, calcification roasting, and leaching rate of major elements using scanning electron microscope, X-ray diffraction analysis, and inductively coupled plasma-optical emission spectroscopy. The results show that the spinel phase is wrapped with silicate phase in all vanadium slag samples. The main elements in the spinel phase are Cr, V, and Ti from the interior to the exterior. The size of spinel phase in low chromium vanadium slag is larger than the other vanadium slags with higher chromium contents. The spinel phase of high-calcium and high-phosphorus vanadium slag is more dispersed. The strongest diffraction peak of vanadium spinel phase in the vanadium slag migrates to a higher diffraction angle, and (Fe_0.6Cr_0.4)₂O₃ is formed after calcification roasting as the chromium content increased. A large amount of Ca₂SiO₄ is produced because excess Ca reacts with Si in high-calcium and high-phosphorus vanadium slag. The vanadium leaching rate reaches 88% in some vanadium slags. The chromium leaching rate is less than 5% in all vanadium slags. The silicon leaching rate of high-calcium and high-phosphorus vanadium slag is much higher than that of the other slags. The leaching rate of manganese is higher than 10%, and the leaching rates of iron and titanium are negligible.
- vanadium slag;
- calcification roasting;
- element distribution;
- phase composition;
- leaching rate

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