Hydrogen assisted magnesiothermic reduction of TiO2
文献类型：期刊论文
| 作者 | Zhang, Ying1,2; Fang, Zhigang Zak1; Xia, Yang1; Sun, Pei1; Van Devener, Brian1; Free, Michael1; Lefler, Hyrum1; Zheng, Shili2 |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2017-01-15 |
| 卷号 | 308页码:299-310 |
| 关键词 | Ti metal powder TiO2 Reduction Deoxygenation Magnesium Hydrogen |
| ISSN号 | 1385-8947 |
| 英文摘要 | The development of low cost titanium metal production processes has challenged the Ti research and industrial communities around the world for decades. The strong affinity of titanium to oxygen dictates that it is very difficult to produce low-oxygen Ti metal from TiO2 directly. In this paper, a hydrogen assisted magnesiothermic reduction (HAMR) process for producing Ti metal powder from TiO2 powder at relatively low temperatures (<= 750 degrees C) is established. The overall approach is based on the thermodynamic tuning of the relative stability of MgO versus that of Ti-O solid solutions by temporarily alloying the system with hydrogen. It is shown that Ti-H-O solid solutions are less stable than their corresponding Ti-O solid solutions, which changes the reaction of Mg with Ti-O from being thermodynamically unfavorable to being favorable. The key steps for producing pure Ti metal powder from TiO2 involve Mg reduction of TiO2 in a hydrogen atmosphere which produces porous TiH2, a heat treatment procedure to consolidate the powder and reduce specific surface area of the powder, and the final step to deoxygenate the powder using Mg in a hydrogen atmosphere to further reduce the oxygen content. This paper systematically examines the changes of oxygen content, phase transformations, and the evolution of the morphology of the particles during the entire process. The results show that this approach has great potential to be a viable method for the production of low-oxygen Ti metal powder from TiO2. In addition, the effect of hydrogen on the oxidation of Ti powder is analyzed using XPS, which reaffirms that titanium hydride is more impervious to surface oxidation than Ti metal, another crucial advantage of using hydrogen atmosphere. (C) 2016 Elsevier B.V. All rights reserved. |
| WOS标题词 | Science & Technology ; Technology |
| 类目[WOS] | Engineering, Environmental ; Engineering, Chemical |
| 研究领域[WOS] | Engineering |
| 关键词[WOS] | O SOLID-SOLUTION ; TITANIUM-DIOXIDE ; CALCIOTHERMIC REDUCTION ; CALCIUM REDUCTANT ; ALLOY POWDER ; DEOXIDATION ; OXIDES ; SOLUBILITY ; CHLORIDE |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000389088000032 |
| 源URL | [http://ir.ipe.ac.cn/handle/122111/21829]  |
| 专题 | 过程工程研究所_湿法冶金清洁生产技术国家工程实验室 |
| 作者单位 | 1.Univ Utah, Dept Met Engn, Salt Lake City, UT 84112 USA 2.Chinese Acad Sci, Key Lab Green Proc & Engn, Natl Engn Lab Hydromet Cleaner Prod Technol, Inst Proc Engn, Beijing 100190, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang, Ying,Fang, Zhigang Zak,Xia, Yang,et al. Hydrogen assisted magnesiothermic reduction of TiO2[J]. CHEMICAL ENGINEERING JOURNAL,2017,308:299-310. |
| APA | Zhang, Ying.,Fang, Zhigang Zak.,Xia, Yang.,Sun, Pei.,Van Devener, Brian.,...&Zheng, Shili.(2017).Hydrogen assisted magnesiothermic reduction of TiO2.CHEMICAL ENGINEERING JOURNAL,308,299-310. |
| MLA | Zhang, Ying,et al."Hydrogen assisted magnesiothermic reduction of TiO2".CHEMICAL ENGINEERING JOURNAL 308(2017):299-310. |
入库方式： OAI收割
来源：过程工程研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。