{"title":"研究钙热还原 TiO2 以绿色生产 Ti 和 TiH2 粉末","authors":"Sung-Hun Park, Jungshin Kang, Ho-Sang Sohn","doi":"10.3365/kjmm.2024.62.3.190","DOIUrl":null,"url":null,"abstract":"To develop an eco-friendly titanium (Ti) production process, the calciothermic reduction of titanium dioxide (TiO2) was investigated. The mechanism involved in the reduction of TiO2 using calcium (Ca) was examined. The influence of a molten salt, calcium chloride (CaCl2), on the calciothermic reduction was investigated by conducting experiments at 1123 – 1223 K in an argon (Ar) atmosphere for the duration of 0.5 – 9 h. When CaCl2 was used as a molten salt, the oxygen (O) concentration in Ti decreased to 0.162 mass% owing to the removal of calcium oxide (CaO) from the surface of the Ti particles. In addition, the use of a CaCl2 – lithium chloride (LiCl) molten salt decreased the reaction temperature to 1073 K and the O concentration in the obtained Ti reached 0.333 mass%. Furthermore, after the calciothermic reduction of TiO2 at 1173 K using a perforated crucible, the residual Ca-containing salt was sufficiently separated in-situ from the crucible, and a mixture of Ti and TiH1.924 was produced via hydrogenation at 1023 K by changing the atmosphere gas from Ar to hydrogen gas (H2). The results of this study demonstrate the feasibility of the calciothermic reduction of TiO2 for the eco-friendly production of Ti and TiH2 powders.","PeriodicalId":17894,"journal":{"name":"Korean Journal of Metals and Materials","volume":null,"pages":null},"PeriodicalIF":1.1000,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Investigation of the Calciothermic Reduction of TiO2 for the Green Production of Ti and TiH2 Powders\",\"authors\":\"Sung-Hun Park, Jungshin Kang, Ho-Sang Sohn\",\"doi\":\"10.3365/kjmm.2024.62.3.190\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"To develop an eco-friendly titanium (Ti) production process, the calciothermic reduction of titanium dioxide (TiO2) was investigated. The mechanism involved in the reduction of TiO2 using calcium (Ca) was examined. The influence of a molten salt, calcium chloride (CaCl2), on the calciothermic reduction was investigated by conducting experiments at 1123 – 1223 K in an argon (Ar) atmosphere for the duration of 0.5 – 9 h. When CaCl2 was used as a molten salt, the oxygen (O) concentration in Ti decreased to 0.162 mass% owing to the removal of calcium oxide (CaO) from the surface of the Ti particles. In addition, the use of a CaCl2 – lithium chloride (LiCl) molten salt decreased the reaction temperature to 1073 K and the O concentration in the obtained Ti reached 0.333 mass%. Furthermore, after the calciothermic reduction of TiO2 at 1173 K using a perforated crucible, the residual Ca-containing salt was sufficiently separated in-situ from the crucible, and a mixture of Ti and TiH1.924 was produced via hydrogenation at 1023 K by changing the atmosphere gas from Ar to hydrogen gas (H2). The results of this study demonstrate the feasibility of the calciothermic reduction of TiO2 for the eco-friendly production of Ti and TiH2 powders.\",\"PeriodicalId\":17894,\"journal\":{\"name\":\"Korean Journal of Metals and Materials\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":1.1000,\"publicationDate\":\"2024-03-05\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Korean Journal of Metals and Materials\",\"FirstCategoryId\":\"88\",\"ListUrlMain\":\"https://doi.org/10.3365/kjmm.2024.62.3.190\",\"RegionNum\":4,\"RegionCategory\":\"材料科学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q4\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Korean Journal of Metals and Materials","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.3365/kjmm.2024.62.3.190","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
摘要
为了开发一种生态友好型钛(Ti)生产工艺,研究人员对二氧化钛(TiO2)的钙热还原进行了调查。研究了使用钙(Ca)还原二氧化钛的机理。通过在 1123 - 1223 K 的氩(Ar)气氛中进行持续 0.5 - 9 小时的实验,研究了熔盐氯化钙(CaCl2)对钙热还原的影响。当使用 CaCl2 作为熔盐时,由于 Ti 颗粒表面的氧化钙(CaO)被去除,Ti 中的氧(O)浓度降至 0.162 质量%。此外,使用 CaCl2 - 氯化锂(LiCl)熔盐将反应温度降至 1073 K,得到的钛中的 O 浓度达到 0.333 质量%。此外,使用穿孔坩埚在 1173 K 下对 TiO2 进行钙热还原后,残留的含 Ca 盐被充分地从坩埚中就地分离出来,并通过将大气气体从 Ar 改为氢气 (H2) 在 1023 K 下进行氢化生成了 Ti 和 TiH1.924 的混合物。这项研究的结果证明了钙热还原 TiO2 以环保方式生产 Ti 和 TiH2 粉末的可行性。
Investigation of the Calciothermic Reduction of TiO2 for the Green Production of Ti and TiH2 Powders
To develop an eco-friendly titanium (Ti) production process, the calciothermic reduction of titanium dioxide (TiO2) was investigated. The mechanism involved in the reduction of TiO2 using calcium (Ca) was examined. The influence of a molten salt, calcium chloride (CaCl2), on the calciothermic reduction was investigated by conducting experiments at 1123 – 1223 K in an argon (Ar) atmosphere for the duration of 0.5 – 9 h. When CaCl2 was used as a molten salt, the oxygen (O) concentration in Ti decreased to 0.162 mass% owing to the removal of calcium oxide (CaO) from the surface of the Ti particles. In addition, the use of a CaCl2 – lithium chloride (LiCl) molten salt decreased the reaction temperature to 1073 K and the O concentration in the obtained Ti reached 0.333 mass%. Furthermore, after the calciothermic reduction of TiO2 at 1173 K using a perforated crucible, the residual Ca-containing salt was sufficiently separated in-situ from the crucible, and a mixture of Ti and TiH1.924 was produced via hydrogenation at 1023 K by changing the atmosphere gas from Ar to hydrogen gas (H2). The results of this study demonstrate the feasibility of the calciothermic reduction of TiO2 for the eco-friendly production of Ti and TiH2 powders.
期刊介绍:
The Korean Journal of Metals and Materials is a representative Korean-language journal of the Korean Institute of Metals and Materials (KIM); it publishes domestic and foreign academic papers related to metals and materials, in abroad range of fields from metals and materials to nano-materials, biomaterials, functional materials, energy materials, and new materials, and its official ISO designation is Korean J. Met. Mater.