Roasting and leaching behaviors of vanadium and chromium in calcification roasting-acid leaching of high-chromium vanadium slag
文献类型：期刊论文
| 作者 | Wen Jing2; Jiang Tao2; Zhou Mi2; Gao Huiyang2; Liu Jiayi2; Xue Xiangxin2 |
| 刊名 | INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
 |
| 出版日期 | 2018 |
| 卷号 | 25期号:5页码:515-526 |
| 关键词 | CALCIUM-OXIDE SOLID-WASTE OXIDATION EXTRACTION CARBONATE MECHANISM REMOVAL CR(VI) high-chromium vanadium slag calcification roasting roasting behaviors leaching behaviors vanadium extraction |
| ISSN号 | 1674-4799 |
| 其他题名 | Roasting and leaching behaviors of vanadium and chromium in calcification roasting-acid leaching of high-chromium vanadium slag |
| 英文摘要 | Calcification roasting-acid leaching of high-chromium vanadium slag (HCVS) was conducted to elucidate the roasting and leaching behaviors of vanadium and chromium. The effects of the purity of CaO, molar ratio between CaO and V2O5 (n(CaO)/n(V2O5)), roasting temperature, holding time, and the heating rate used in the oxidation-calcification processes were investigated. The roasting process and mechanism were analyzed by X-ray diffraction (XRD), scanning electron microscopy (SEM), and thermogravimetry-differential scanning calorimetry (TG-DSC). The results show that most of vanadium reacted with CaO to generate calcium vanadates and transferred into the leaching liquid, whereas almost all of the chromium remained in the leaching residue in the form of (Fe0.6Cr0.4)(2)O-3. Variation trends of the vanadium and chromium leaching ratios were always opposite because of the competitive reactions of oxidation and calcification between vanadium and chromium with CaO. Moreover, CaO was more likely to combine with vanadium, as further confirmed by thermodynamic analysis. When the HCVS with CaO added in an n(CaO)/n(V2O5) ratio of 0.5 was roasted in an air atmosphere at a heating rate of 10 degrees C/min from room temperature to 950 degrees C and maintained at this temperature for 60 min, the leaching ratios of vanadium and chromium reached 91.14% and 0.49%, respectively; thus, efficient extraction of vanadium from HCVS was achieved and the leaching residue could be used as a new raw material for the extraction of chromium. Furthermore, the oxidation and calcification reactions of the spinel phases occurred at 592 and 630 degrees C for n(CaO)/n(V2O5) ratios of 0.5 and 5, respectively. |
| 资助项目 | [National Natural Science Foundation of China] ; [National Basic Research Program of China] ; [Fundamental Funds for the Central Universities] |
| 语种 | 英语 |
| CSCD记录号 | CSCD:6242210 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/155103]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 作者单位 | 1.中国科学院金属研究所 2.东北大学 |
| 推荐引用方式 GB/T 7714 | Wen Jing,Jiang Tao,Zhou Mi,et al. Roasting and leaching behaviors of vanadium and chromium in calcification roasting-acid leaching of high-chromium vanadium slag[J]. INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,2018,25(5):515-526. |
| APA | Wen Jing,Jiang Tao,Zhou Mi,Gao Huiyang,Liu Jiayi,&Xue Xiangxin.(2018).Roasting and leaching behaviors of vanadium and chromium in calcification roasting-acid leaching of high-chromium vanadium slag.INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS,25(5),515-526. |
| MLA | Wen Jing,et al."Roasting and leaching behaviors of vanadium and chromium in calcification roasting-acid leaching of high-chromium vanadium slag".INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS 25.5(2018):515-526. |
入库方式： OAI收割
来源：金属研究所
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