Preparation of low-oxygen titanium powder by magnesiothermic reduction of TiO2 assisted by MgCl2-HoCl3 molten salt

IF 4.7 1区材料科学 Q1 METALLURGY & METALLURGICAL ENGINEERING

Transactions of Nonferrous Metals Society of China Pub Date : 2024-11-01 DOI:10.1016/S1003-6326(24)66638-0

Li-guo ZHU , Chong-lin BAI , Ling-xin KONG , Bin YANG , Bao-qiang XU

{"title":"Preparation of low-oxygen titanium powder by magnesiothermic reduction of TiO2 assisted by MgCl2-HoCl3 molten salt","authors":"Li-guo ZHU , Chong-lin BAI , Ling-xin KONG , Bin YANG , Bao-qiang XU","doi":"10.1016/S1003-6326(24)66638-0","DOIUrl":null,"url":null,"abstract":"<div><div>To reduce the production cost of titanium, a new method for direct preparation of low-oxygen titanium powder by the magnesiothermic reduction of TiO2 with the assistance of a MgCl2-HoCl3 molten salt was proposed. Thermodynamic calculations showed that the magnesiothermic reduction of TiO2 was feasible. However, hindrance of the reduction reaction by the reduction by-product of MgO resulted in a considerably high O concentration in the titanium powder. The addition of HoCl3 to the system significantly reduces the activity of MgO to produce low-oxygen titanium powder. Thermochemical deoxidation and reduction experiments were conducted with MgCl2-HoCl3 molten salt in the temperature range of 1023-1273 K. The results showed that titanium powder with oxygen concentration (mass fraction) below 5.00×10-4 can be prepared at the Mg-MgCl2-HoOCl-HoCl3 equilibrium.</div></div>","PeriodicalId":23191,"journal":{"name":"Transactions of Nonferrous Metals Society of China","volume":"34 11","pages":"Pages 3749-3761"},"PeriodicalIF":4.7000,"publicationDate":"2024-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Transactions of Nonferrous Metals Society of China","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1003632624666380","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"METALLURGY & METALLURGICAL ENGINEERING","Score":null,"Total":0}

引用次数: 0

Abstract

To reduce the production cost of titanium, a new method for direct preparation of low-oxygen titanium powder by the magnesiothermic reduction of TiO₂ with the assistance of a MgCl₂-HoCl₃ molten salt was proposed. Thermodynamic calculations showed that the magnesiothermic reduction of TiO₂ was feasible. However, hindrance of the reduction reaction by the reduction by-product of MgO resulted in a considerably high O concentration in the titanium powder. The addition of HoCl₃ to the system significantly reduces the activity of MgO to produce low-oxygen titanium powder. Thermochemical deoxidation and reduction experiments were conducted with MgCl₂-HoCl₃ molten salt in the temperature range of 1023-1273 K. The results showed that titanium powder with oxygen concentration (mass fraction) below 5.00×10^-4 can be prepared at the Mg-MgCl₂-HoOCl-HoCl₃ equilibrium.

查看原文本刊更多论文

求助全文

约1分钟内获得全文求助全文

来源期刊

Transactions of Nonferrous Metals Society of China 工程技术-冶金工程

CiteScore

7.40

自引率

17.80%

发文量

8456

审稿时长

3.6 months

期刊介绍： The Transactions of Nonferrous Metals Society of China (Trans. Nonferrous Met. Soc. China), founded in 1991 and sponsored by The Nonferrous Metals Society of China, is published monthly now and mainly contains reports of original research which reflect the new progresses in the field of nonferrous metals science and technology, including mineral processing, extraction metallurgy, metallic materials and heat treatments, metal working, physical metallurgy, powder metallurgy, with the emphasis on fundamental science. It is the unique preeminent publication in English for scientists, engineers, under/post-graduates on the field of nonferrous metals industry. This journal is covered by many famous abstract/index systems and databases such as SCI Expanded, Ei Compendex Plus, INSPEC, CA, METADEX, AJ and JICST.