Preparing Titanium Powders by Calcium Vapor Reduction Process of Titanium Dioxide

Xu, Baoqiang; Yang, Bin; Wan, Heli; Sen, Wei; Dai, Yongnian; Liu, Dachun

doi:10.1002/9781118062173.ch63

Cited by 4 publications

(3 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It reduces the consumption of CaCl 2 molten salt compared with electro-deoxidation of titanium dioxide in molten calcium chloride. Recently, Xu et al [14][15][16] improved the PRP method and obtained titanium powders in a simpler way. The new experimental procedures are shown in Figure1 And Jia et al [17] obtained the titanium powders sample with O residue of 1000ppm, N residue of 170ppm.…”

Section: Introductionmentioning

confidence: 99%

Hydrochloric Acid Leaching of Calcium Vapor Reduction Products of TiO₂

Wang

Yang

et al. 2016

Proceedings of the 13th World Conference on Titanium

Self Cite

View full text Add to dashboard Cite

Preparation of titanium powders from TiO 2 by calcium vapor reduction is one of the most active new methods for titanium production, and the acid leaching process of reduction products plays an important role in this process. In this paper, the leaching process of the reduction products for 1kg scale experiment was investigated by XRF, XRD, SEM-EDS, ICP-AES and EDTA complex formation titration. The results show CaO and other impurities can be effectively removed by dilute HCl solution. The leaching rate of titanium decreases with deceasing temperature, initial acid-to-calcium molar ratio and particle size but increasing liquid-to-solid ratio. And the leaching rate of calcium increases with increasing temperature, initial acid-to-calcium molar ratio, liquid-to-solid ratio but decreasing particle size. Residual oxygen in titanium powders is mainly resulted from uncompleted reduction of the intermediate CaTiO 3 besides the Ti-O solid solution.

show abstract

Section: Introductionmentioning

confidence: 99%

Hydrochloric Acid Leaching of Calcium Vapor Reduction Products of TiO₂

Wang

Yang

et al. 2016

Proceedings of the 13th World Conference on Titanium

Self Cite

View full text Add to dashboard Cite

show abstract

“…This process is supposed to realize commercial production and has aroused enough interest. In our previous study [11], a simplified PRP process was put forward, which deleted the sintering procedure and needn't any sponge titanium in reactor.…”

Section: Introductionmentioning

confidence: 99%

“…So, CaTiO 3 phase in pattern (a) derives from the reaction between TiO 2 and CaO, which is the decomposition product CaO from CaCl 2 with crystal water. The formation of titanium suboxide Ti 9 O 17 phase and Ti 2 O 3 phase may be owe to CaCl 2 breaking the structure of Ti-O[19]. In pattern (b), when TiO 2 is reduced by calcium vapor at 1000 ℃ for 4 h, Ti 2 O 3 and Ti 9 O 17 phase, which are the reduction products and CaO, the by-product appear.…”

mentioning

confidence: 99%

Behavior of Intermediate CaTiO<sub>3</sub> in Reduction Process of TiO<sub>2</sub> by Calcium Vapor

Jia

Yang

et al. 2013

KEM

Self Cite

View full text Add to dashboard Cite

Preparing titanium powders by calcium vapor reduction of titanium oxide directly is a new way with short flow sheet and CaTiO3 is the very important intermediate compound in this process. In this paper, the behavior of intermediate CaTiO3 in the reduction process of TiO2 was investigated. The thermodynamic calculation indicated that the Gibbs free energy change of the reaction to produce CaTiO3 by CaO and TiO2 was always negative below 1000 °C; The reaction Gibbs free energy change of the calciothermic reduction of CaTiO3 was lower than that of TiO, which would be the most predominant step from TiO2 to Ti. The experimental results showed that CaTiO3 phase derived from the reaction between TiO2 and the reduction by-product CaO, and the reaction between TiO2 and the decomposition product CaO from the additive of CaCl2 with crystal water as well in the calcium vapor reduction process of titanium oxide. But CaTiO3 could be reduced to Ti much easier than that of TiO2 by calcium vapor.

show abstract

Reduction Product Separation by Vacuum Distillation in the Process of Titanium Sponge Preparation

Li¹,

Li²,

Chen³

et al. 2014

5th International Symposium on High‐Temperature Metallurgical Processing

View full text Add to dashboard Cite

Preparing Titanium Powders by Calcium Vapor Reduction Process of Titanium Dioxide

Cited by 4 publications

References 10 publications

Hydrochloric Acid Leaching of Calcium Vapor Reduction Products of TiO₂

Hydrochloric Acid Leaching of Calcium Vapor Reduction Products of TiO₂

Behavior of Intermediate CaTiO<sub>3</sub> in Reduction Process of TiO<sub>2</sub> by Calcium Vapor

Reduction Product Separation by Vacuum Distillation in the Process of Titanium Sponge Preparation

Contact Info

Product

Resources

About

Preparing Titanium Powders by Calcium Vapor Reduction Process of Titanium Dioxide

Cited by 4 publications

References 10 publications

Hydrochloric Acid Leaching of Calcium Vapor Reduction Products of TiO2

Hydrochloric Acid Leaching of Calcium Vapor Reduction Products of TiO2

Behavior of Intermediate CaTiO<sub>3</sub> in Reduction Process of TiO<sub>2</sub> by Calcium Vapor

Reduction Product Separation by Vacuum Distillation in the Process of Titanium Sponge Preparation

Contact Info

Product

Resources

About

Hydrochloric Acid Leaching of Calcium Vapor Reduction Products of TiO₂

Hydrochloric Acid Leaching of Calcium Vapor Reduction Products of TiO₂