Direct Extraction of Titanium Alloys/Composites from Titanium Compounds Ores in Molten CaCl2
2017
Source PublicationMATERIALS TRANSACTIONS
ISSN1345-9678
Volume58
Issue3
Pages331-340
Status已发表
DOI10.2320/matertrans.MK201603
Abstract

Molten salt electroreduction process provides a simple approach for the facile production of alloys and composites. In this work, the solid oxide membrane (SOM)-assisted molten salt electroreduction process has been used to produce titanium alloys/composites directly from complex titanium compounds ores. The Ti-bearing blast-furnace slag, high titanium slag and natural ilmenite were used as raw materials. The SOM-assisted electroreduction process was carried out in molten calcium chloride (CaCl2) at 950-1000 degrees C and 3.8 V. The reaction mechanisms of the electroreduction process including the compounding process, the electroreduction process and the impurity-removal process were discussed. The results indicate that Ti5Si3, Ti5Si3/TiC, Ti5Si3/Ti3SiC2, Fe/TiC and TiAl3 alloys/composites can be directly electrosynthesized from different titanium compounds ores. CaTiO3 and Ca12Al14O33 compounds will be commonly generated as intermediate products during the electroreduction process in molten CaCl2. Impurities elements such as Ca and Mg can be removed during the electroreduction process. In addition, it is suggested that element Fe will be firstly generated during electroreduction process and thus can further improve the electronic conductivity of the ilmenite compounds pellets, Fe/TiC composites can be facilely produced from natural ilmenite.

KeywordTitanium Compounds Ores Electroreduction Molten Salts Titanium Alloys Composites
Publication PlaceSENDAI
Conference PlaceHokkaido Univ, Hokkaido, JAPAN
Conference DateJUL 10-14, 2016
Indexed BySCI ; ISTP
Language英语
WOS Research AreaMaterials Science ; Metallurgy & Metallurgical Engineering
WOS SubjectMaterials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS IDWOS:000398132300007
PublisherJAPAN INST METALS
EISSN1347-5320
Citation statistics
Document Type会议论文
Identifierhttps://kms.shanghaitech.edu.cn/handle/2MSLDSTB/6345
Collection个人在本单位外知识产出
Affiliation
1.Shanghai Univ, Sch Mat Sci & Engn, Shanghai Key Lab Adv Ferromet, State Key Lab Adv Special Steel, Shanghai 200072, Peoples R China
2.Guizhou Univ, Sch Met & Mat, Guiyang 550025, Peoples R China
3.Aberystwyth Univ, Inst Math & Phys, Aberystwyth SY23 3BZ, Dyfed, Wales
Recommended Citation
GB/T 7714
Zou, Xingli,Li, Shangshu,Lu, Xionggang,et al. Direct Extraction of Titanium Alloys/Composites from Titanium Compounds Ores in Molten CaCl2[C]. SENDAI:JAPAN INST METALS,2017:331-340.
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