Direct magnesiothermic reduction of titanium dioxide to titanium powder through combustion synthesis

Nersisyan, Hayk H.; Won, H.I.; Won, C.W.; Jo, Ahrae; Kim, J.H.

doi:10.1016/j.cej.2013.08.104

Cited by 42 publications

(15 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…However, the purification processes to produce TiCl 4 , including the high temperature chlorination process from TiO 2 -bearing minerals involves a series of highly energy intensive and costly processes [4]. Motivated by the aim to avoid the high temperature chlorination process, there have been many investigations involving the use of commercial TiO 2 [5,6], titania slag, synthetic rutile, or up-graded Ti slag (~95% or higher TiO 2 content) [7] as the precursor. Intuitively TiO 2 would be a lower cost precursor than TiCl 4 because the chlorination step could be avoided.…”

Section: Introductionmentioning

confidence: 99%

A novel chemical pathway for energy efficient production of Ti metal from upgraded titanium slag

Zhang

Fang

Yang

et al. 2016

Chemical Engineering Journal

View full text Add to dashboard Cite

The developments of energy efficient, low cost titanium metal production processes have challenged the metallurgical industry and research community around the world for several decades. The strong affinity of titanium to oxygen dictates that the conventional Ti metal production processes are energy-intensive. In this paper, a new approach that is designed to minimize energy consumption and overall cost for Ti production is presented. The overall approach is based on a chemical pathway that synergistically integrating a series of low cost unit processes to produce Ti that can match the quality of the product produced by the Kroll process commercially to date. The key steps include production of purified TiO 2 with controlled sizes and morphologies, Mg reduction in the presence of hydrogen to form porous TiH 2 , heat treatment to close the pores, and Ca de-oxygenation to reduce oxygen content to less than 0.15wt%. The results show that this approach can indeed produce Ti metal powder that has high purity, low oxygen, and meets the specifications by ASTM for general purpose Ti sponge, directly from upgraded titanium slag (UGS) without the high temperature © 2015. This manuscript version is made available under the Elsevier user license http://www.elsevier.com/open-access/userlicense/1.0/ 2 chlorination step.

show abstract

Section: Introductionmentioning

confidence: 99%

A novel chemical pathway for energy efficient production of Ti metal from upgraded titanium slag

Zhang

Fang

Yang

et al. 2016

Chemical Engineering Journal

View full text Add to dashboard Cite

show abstract

“…In this study, as an alternative reducing agent to substitute metallic calcium, metallic magnesium powder is used. Nersisyan et al have synthesized Ti powders containing a small amount of oxygen from titanium dioxide through combustion synthesis directly utilizing magnesiothermic reduction [19,20].…”

Section: Introductionmentioning

confidence: 99%

Combustion synthesis of TiFe by utilizing magnesiothermic reduction

Deguchi

Yasuda

Chen

et al. 2015

Journal of Alloys and Compounds

View full text Add to dashboard Cite

“…For magnesium, there is a reducing limit ( 2 mass% oxygen left in titanium at 750 C) when reduction is done in Ar. The lowest oxygen achieved in the literature has been 1.5 mass% 26) , which is still far from the standard speci cation for titanium. Therefore, most of the thermochemical reduction of TiO 2 has been conducted by using calcium.…”

Section: Introductionmentioning

confidence: 89%

Hydrogen Assisted Magnesiothermic Reduction (HAMR) of Commercial TiO<sub>2</sub> to Produce Titanium Powder with Controlled Morphology and Particle Size

et al. 2017

View full text Add to dashboard Cite

A two-step thermochemical reduction was developed to remove oxygen from commercial titanium dioxide, TiO 2 , producing metallic titanium powder. The rst step was to remove >95% of the oxygen by Mg reduction in a hydrogen atmosphere, followed by a de-oxygenation step. The goal is to produce Ti powder that meets the standard speci cations for titanium. Several ancillary steps including granulation and heat treatment were introduced to modify the powder morphology, particle size and powder density to make the powder suitable for a range of applications. Detailed compositional analysis indicated that the nal product meets the ASTM B299 for general-purpose titanium sponge. The powder can be irregularly shaped or spherical with different granulation treatments.

show abstract

Direct magnesiothermic reduction of titanium dioxide to titanium powder through combustion synthesis

Cited by 42 publications

References 4 publications

A novel chemical pathway for energy efficient production of Ti metal from upgraded titanium slag

A novel chemical pathway for energy efficient production of Ti metal from upgraded titanium slag

Combustion synthesis of TiFe by utilizing magnesiothermic reduction

Hydrogen Assisted Magnesiothermic Reduction (HAMR) of Commercial TiO<sub>2</sub> to Produce Titanium Powder with Controlled Morphology and Particle Size

Contact Info

Product

Resources

About