Experimental investigation on the formation mechanism of the TiFe alloy by the molten-salt electrolytic titanium concentrate

Shi, Rui; Bai, Chenguang; Hu, Mingyou; Liu, X.; Du, Jiaojiao

doi:10.2298/jmmb101012002s

Cited by 9 publications

(3 citation statements)

References 8 publications

(11 reference statements)

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“…In Fig. 5c, additional phases (iron titanium and iron titanium oxide phases) are composed and can be seen in 2θ = (42) and (32, 36) 28,29 . The results indicated that iron and aluminum entered into the crystal lattice of titanium dioxide.…”

Section: Xrdmentioning

confidence: 98%

Synthesis and Characterization of Al-TiO2/ZnO and Fe-TiO2/ZnO Photocatalyst and Their Photocatalytic Behaviour

Moradi¹,

Azar²,

Farshid³

et al. 2013

Asian J. Chem.

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The TiO2/ZnO, Al-TiO2/ZnO and Fe-TiO2/ZnO nanocomposites as photocatalysts were prepared by the sol-gel method. The structures and properties were recognized with fourier transform infrared spectroscopy, scanning electron microscopy and X-ray diffraction methods. The XRD studies showed that addition of aluminum and iron to TiO2/ZnO affected on the particle size of nanocomposite. UV-visible spectrophotometry was used to determine dye concentration. The photocatalytic activity of the synthesized nanocomposites was investigated for decolorization of methyl orange and methylene blue in water under UV irradiation in a batch reactor. The results revealed that the photocatalytic activity of the nanocomposites for decolorization of methylene blue was better than methyl orange.

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Section: Xrdmentioning

confidence: 98%

Synthesis and Characterization of Al-TiO2/ZnO and Fe-TiO2/ZnO Photocatalyst and Their Photocatalytic Behaviour

Moradi¹,

Azar²,

Farshid³

et al. 2013

Asian J. Chem.

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“…It has been a hotspot issue to directly prepare titanium or titanium alloy from titanium oxides by the electrochemical reduction. Molten salt electrolytic methods, as a short process and direct preparation of titanium alloys, is becoming an issue with an increased concern, while it has not been used in a real production due to the limits of electrode materials and current efficiency [3][4][5][6][7][8]. Thermite method (also called thermite reduction), using aluminum as a reductant and high-grade ilmenite as raw materials, is another short process of directly producing high titanium 2 of 10 ferroalloy.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of Melt Separation in Preparation of Low-Oxygen High Titanium Ferroalloy Prepared by Multistage and Deep Reduction

Cheng

Zhang

2020

Metals

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A novel method to prepare low-oxygen and high-titanium ferroalloy by multistage and deep reduction was proposed in this study. Specifically, the raw materials, high titanium slag and iron concentrate are firstly reduced by insufficient Al powder to obtain high temperature melt. Secondly, CaO and CaF2 are added into the melt to adjust the basicity of the molten slag. Then, a melt separation under the heat preservation is carried out to intensify the slag-metal separation. Finally, calcium or magnesium is added into the metal melt for a deep reduction. Thereafter, high titanium ferroalloy with an extra-low oxygen content can be obtained. Effects of slag basicity and melt separation time on the slag-metal separation removal were systematically studied. The results indicate that the high titanium ferroalloy, produced by the thermite method, contains a lot of Al2O3 inclusions. This leads to a high oxygen and aluminum content in the alloy. With a melt separation with high basicity slag treatment, the Al2O3 inclusions can be effectively removed from the alloy melt, and the slag-metal separation efficiency is greatly improved. With the addition of high basicity slag during melt separation, Ti content in the alloy is improved from 51.04% to 68.24%. Furthermore, and the Al and O contents are reduced from 10.38% and 9.36% to 4.24% and 1.56%, respectively. However, suboxides, such as Ti2O and Fe0.9536O, still exist after a melt separation. This indicates that a deep reduction is needed to obtain extra-low oxygen high titanium ferroalloy.

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“…This process would inevitably emit large quantities of CO 2 greenhouse gas. It is well known that high-temperature direct electrolysis is a basic method to produce some metals and alloys [1][2][3][4][5]. To solve thoroughly the problem of CO 2 emissions in ironmaking process, several researchers have explored direct electrolysis to prepare iron in recent years, such as the molten salt electrolysis method of G. Haarberg [6] and G.M.…”

Section: Introductionmentioning

confidence: 99%

Study on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing FeO

Gao

Wang

et al. 2013

J min metall B Metall

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A ZrO2-based solid membrane electrolytic cell with controlled oxygen flow was constructed: graphite rod /[O]Fe+C saturated / ZrO2(MgO)/(FeO) slag/iron crucible. The feasibility of extraction of iron from molten oxide slag containing FeO at an applied voltage was investigated by means of the electrolytic cell. The effects of some important process factors on the FeO electrolytic reduction with the controlled oxygen flow were discussed. The results show that: solid iron can be extracted from molten oxide slag containing FeO at 1450ºC and an applied potential of 4V. These factors, such as precipitation and growth of solid iron dendrites, change of the cathode active area on the inner wall of the iron crucible and ion diffusion flux in the molten slag may affect the electrochemical reaction rate. The reduction for Fe2+ ions mainly appears on new iron dendrites of the iron crucible cathode, and a very small amount of iron are also formed on the MSZ (2.18% MgO partially stabilized zirconia) tube/slag interface due to electronic conductance of MSZ tube. Internal electronic current through MSZ tube may change direction at earlier and later electrolytic reduction stage. It has a role of promoting electrolytic reduction for FeO in the molten slag at the earlier stage, but will lower the current efficiency at the later stage. The final reduction ratio of FeO in the molten slag can achieve 99%. A novel electrolytic method with controlled oxygen flow for iron from the molten oxide slag containing FeO was proposed. The theory of electrolytic reduction with the controlled oxygen flow was developed

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Experimental investigation on the formation mechanism of the TiFe alloy by the molten-salt electrolytic titanium concentrate

Cited by 9 publications

References 8 publications

Synthesis and Characterization of Al-TiO2/ZnO and Fe-TiO2/ZnO Photocatalyst and Their Photocatalytic Behaviour

Synthesis and Characterization of Al-TiO2/ZnO and Fe-TiO2/ZnO Photocatalyst and Their Photocatalytic Behaviour

Mechanism of Melt Separation in Preparation of Low-Oxygen High Titanium Ferroalloy Prepared by Multistage and Deep Reduction

Study on electrolytic reduction with controlled oxygen flow for iron from molten oxide slag containing FeO

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