Preparation of Aluminum-Zirconium Master Alloy by Aluminothermic Reduction in Cryolite Melt

Liu, Fengguo; Ding, Chenliang; Tao, Wei; Hu, Xianwei; Gao, Bingliang; Shi, Zhongning; Wang, Zhaowen

doi:10.1007/s11837-017-2548-7

Cited by 7 publications

(3 citation statements)

References 24 publications

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“…It is seen that the majority of zirconium in a master alloy is presented by the phases of intermetallic compounds having a zirconium content of 52-53 wt%, which corresponds to the Al 3 Zr compound. 48,49 This is confirmed by Roentgen-phase analysis data (Fig. 11).…”

Section: E32supporting

confidence: 71%

Synthesis of Al-Zr Master Alloys via the Electrolysis of KF-NaF-AlF₃-ZrO₂Melts

Филатов

Pershin

Suzdaltsev

et al. 2018

J. Electrochem. Soc.

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Effects of the KF-NaF-AlF 3 melt composition, ZrO 2 concentration and aluminothermic synthesis parameters on the conversion rate of zirconium to aluminum were investigated. The kinetics of zirconium electroreduction on glassy-carbon obtained from KF-AlF 3 -ZrO 2 melts at a temperature of 750 • C was studied via the cyclic voltammetry method. Parameters of the electrolysis of KF-NaF-AlF 3 -ZrO 2 melts were derived on the basis of obtained results, and the theoretical possibility for the electrolytic production of Al-Zr master alloys (having up to 15 wt% zirconium content) was demonstrated.

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Section: E32supporting

confidence: 71%

Synthesis of Al-Zr Master Alloys via the Electrolysis of KF-NaF-AlF₃-ZrO₂Melts

Филатов

Pershin

Suzdaltsev

et al. 2018

J. Electrochem. Soc.

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“…[6][7][8][9][10][11][12][13][14][15]. Nowadays, aluminothermic reduction is the most common practice used in the production of both kinds of products, pure metals or alloys [16][17][18][19]. However, only recently has the understanding of the kinetics of reaction been addressed for the systems of reaction, as every system is quite different.…”

Section: Introductionmentioning

confidence: 99%

A Kinetic Study on the Preparation of AlNi Alloys by Aluminothermic Reduction of NiO Powders

Beltran¹,

Valdés²,

Torres³

et al. 2018

Metals

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In this work, the experimental results obtained during the preparation of Al-Ni and Al-Ni-Mg alloys using the aluminothermic reduction of NiO by submerged powder injection, assisted with mechanical agitation are presented and discussed. The analyzed variables were melt temperature, agitation speed, and initial magnesium concentration in the molten alloy. For some of the experiments performed, it was found that the Ni concentration increased from 0 to about 3 wt-% after 90 min of treatment at constant temperature and constant agitation speed. In order to determine the values of the kinetic parameters of interest, such as the activation energy and the rate constants, the values of the results obtained were fitted to the kinetic formulae available. Moreover, the kinetics of the reaction were found to be governed by the diffusion of Al and Mg to the NiO boundary layer, where MgAl2O4 or Al2O3 were formed as the main reaction products. Finally, from a thermodynamic study of the system, the main reactions that took place are explained.

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“…Due to the fact that the alloys can be obtained from the cheapest oxide raw materials in one stage on the basis of an existing industrial aluminum electrolyzer, the attention of researchers to this method has been noted for a long time in 1970-1980 years in Norway, USSR, China and other countries. 17,18,23,49 The main advantage of the electrolytic method is the possibility of organization a continuous master alloy production due to the decomposition of oxides from the melt. However, the method has not yet been implemented, also due to the high temperature (960 °C-1000 °C), aggressiveness of the melt as well as a lack of basic research, because when changing the composition of the electrolyte in aluminum electrolyzer, the physical and chemical properties and parameters of the electrolysis changes significantly.…”

mentioning

confidence: 99%

Review—Synthesis of Aluminum Master Alloys in Oxide-Fluoride Melts: A Review

Suzdaltsev

Pershin

Филатов

et al. 2020

J. Electrochem. Soc.

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A review of the existing methods for producing aluminum master alloys with silicon, zirconium, scandium and boron are given. Basic parameters, advantages and disadvantages of the existing methods are analyzed, indicating the need to develop new more energy-efficient technologies. The prospects of obtaining aluminum master alloys in the electrolysis of melts based on the KF-NaF-AlF 3 -Al 2 O 3 -MeO (MeO = SiO 2, ZrO 2 , Sc 2 O 3 , and B 2 O 3 ) system are considered. For this purpose, the results of physical and chemical measurements in these melts are presented, including data on the solubility of Al 2 O 3 , SiO 2, ZrO 2 , Sc 2 O 3 , and B 2 O 3 oxides in KF-NaF-AlF 3 melts, data on the effect of oxide additives on the liquidus temperature of studied melts, as well as data on the kinetics of electrowinning of aluminum and alloying element from KF-AlF 3 -Al 2 O 3 -MeO melts. Based on the measurements, the parameters were selected and electrolysis tests were carried out for obtaining aluminum master alloys with silicon, zirconium, scandium, and boron from its oxides. The composition and structure of the obtained master alloys were studied.

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Preparation of Aluminum-Zirconium Master Alloy by Aluminothermic Reduction in Cryolite Melt

Cited by 7 publications

References 24 publications

Synthesis of Al-Zr Master Alloys via the Electrolysis of KF-NaF-AlF₃-ZrO₂Melts

Synthesis of Al-Zr Master Alloys via the Electrolysis of KF-NaF-AlF₃-ZrO₂Melts

A Kinetic Study on the Preparation of AlNi Alloys by Aluminothermic Reduction of NiO Powders

Review—Synthesis of Aluminum Master Alloys in Oxide-Fluoride Melts: A Review

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Preparation of Aluminum-Zirconium Master Alloy by Aluminothermic Reduction in Cryolite Melt

Cited by 7 publications

References 24 publications

Synthesis of Al-Zr Master Alloys via the Electrolysis of KF-NaF-AlF3-ZrO2Melts

Synthesis of Al-Zr Master Alloys via the Electrolysis of KF-NaF-AlF3-ZrO2Melts

A Kinetic Study on the Preparation of AlNi Alloys by Aluminothermic Reduction of NiO Powders

Review—Synthesis of Aluminum Master Alloys in Oxide-Fluoride Melts: A Review

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Synthesis of Al-Zr Master Alloys via the Electrolysis of KF-NaF-AlF₃-ZrO₂Melts

Synthesis of Al-Zr Master Alloys via the Electrolysis of KF-NaF-AlF₃-ZrO₂Melts