Preparation of Al-Sc Alloy by LiF-ScF3-ScCl3 Molten Salt Electrolysis

2011 ◽  
Vol 675-677 ◽  
pp. 1125-1128 ◽  
Author(s):  
Rui Guo ◽  
Xiu Jing Zhai ◽  
Ting An Zhang
Keyword(s):  
Molten Salt ◽  
Base Alloy ◽  
Process Condition ◽  
Cell Voltage ◽  
Scandium Oxide ◽  
Raw Material ◽  
Electrolysis Time ◽  
Molten Salt Electrolysis ◽  
Aluminum Base Alloy ◽  
Aluminum Base

The paper studied the preparation of Al-Sc alloy by molten salt electrolysis. LiF-ScF3-ScCl3 as the electrolyte, Sc2O3 as raw material, liquid Al as cathode and graphite as anode. The process condition of preparating Al-Sc alloy includes the influence of current density, electrolysis time, temperature of electrolysis, Back EMF, content of Sc in alloy and current efficiency.The content of Sc in alloy prepared by this method has reached to the maximum of 3.437%. The components of alloys showed by SEM were uniform, it is applicable for commercial purposes. Preparation of Al-Sc alloys with scandium oxide as raw materials, it not only reduce environment pollution, but also decease the cost of production. It is reported in many documents, preparing aluminum base alloy by the method of molten salt electrolysis[1-3], people could make many alloys such as Al-Ce、Al-La、Al-RE、Al-Ti、Al-Si-Ti in the aluminum cell, also the method to prepare some rare earth alloys such as Al-Sr、Nd-Fe、La-Ni was reported[4,5]. Use the method of electrolysis to produce some aluminum base alloy with high-melting-point , difficult to restore , high-priced element is a good method because it is technological process is brief, economy is rational, the technology is feasible, this viewpoint is broadly approved in the world[6]. It isn’t necessary to use high-priced Sc as raw material in preparing Al-Sc alloy with molten salt electrolysis, it could control the Sc amounts in the alloy through the different current efficiency and electrolysis time, production in this method could be continuous or semi-continuous, so it is easy to be automatic controlled. A new molten salt system is used in this paper, we use molten salt electrolysis to produce Al-Sc alloy, take scandium oxide as raw material, through the study of the effect of the current intensity，electrolysis time and the electrolysis temperature , Back EMF and cell voltage, the final production Al-Sc alloy contains Sc 2~6%.

ALUMINUM A413.0

Alloy Digest ◽  
1984 ◽  
Vol 33 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Shear Strength ◽  
Physical Properties ◽  
Tensile Properties ◽  
Base Alloy ◽  
Heat Treating ◽  
Aluminum Base Alloy ◽  
Thin Walled ◽  
High Silicon ◽  
Aluminum Base

Abstract ALUMINUM A413.0 is a high-silicon (nominally 12%), aluminum-base alloy. It is recommended for applications where excellent castability and resistance to corrosion are required. Typical uses comprise miscellaneous thin-walled and intricately designed castings for such items as meter cases and automobile fittings. This datasheet provides information on composition, physical properties, elasticity, tensile properties, and shear strength as well as fatigue. It also includes information on corrosion resistance as well as casting, heat treating, machining, and joining. Filing Code: Al-251. Producer or source: Various aluminum companies.

Electrochemical recovery of Ni metallic in molten salts from spent lithium-ion battery

2020 ◽  
Vol 18 (8) ◽  
Author(s):  
Jinglong Liang ◽  
Jing Wang ◽  
Hui Li ◽  
Chenxiao Li ◽  
Hongyan Yan ◽  
...  
Keyword(s):  
Molten Salt ◽  
Lithium Ion Battery ◽  
Electrochemical Reduction ◽  
Lithium Ion ◽  
Cell Voltage ◽  
Metallic Nickel ◽  
Molten Salt Electrolysis ◽  
Reduction Behavior ◽  
Urgent Task ◽  
Constant Cell

AbstractMassive deployment of lithium-ion battery inevitably causes a large amount of solid waste. To be sustainably implemented, technologies capable of reducing environmental impacts and recovering resources from spent lithium-ion battery have been an urgent task. The electrochemical reduction of LiNiO2 to metallic nickel has been reported, which is a typical cathode material of lithium-ion battery. In this paper, the electrochemical reduction behavior of LiNiO2 is studied at 750 °C in the eutectic NaCl-CaCl2 molten salt, and the constant cell voltage electrolysis of LiNiO2 is carried out. The results show that Ni(III) is reduced to metallic nickel by a two-step process, Ni(III) → Ni(II) → Ni, which is quasi-reversible controlled by diffusion and electron transfer. After electrolysis for 6 h at 1.4 V, the surface of LiNiO2 cathode is reduced to metallic nickel, with NiO and a small amount of Li0.4Ni1.6O2 detected inside the partially reduced cathode. After prolonging the electrolysis time to 12 h, LiNiO2 is fully electroreduced to metallic nickel, achieving a high current efficiency of 98.60%. The present work highlights that molten salt electrolysis could be an effective protocol for reclamation of spent lithium-ion battery.

Research on Effect Factors of Current Efficiency in the Process of Sponge Titanium Production by Electrolytic Method

2013 ◽  
Vol 873 ◽  
pp. 72-76
Author(s):  
Guang Qiang Ma ◽  
Ming Zou ◽  
Qi Ling Wang
Keyword(s):  
Current Efficiency ◽  
Molten Salt ◽  
Current Density ◽  
Research Result ◽  
Raw Material ◽  
Salt System ◽  
Anodic Current Density ◽  
Molten Salt Electrolysis ◽  
Sponge Titanium ◽  
Molten Salt System

This paper systematically analyzes the various factors that affect the current efficiency in the process of sponge titanium production by vacuum molten salt electrolysis method. The research result shows that firstly, when electrolysis is undertaken in CaCl2 molten salt system under the condition that the pressure is under 101Pa, temperature is at 850°C, space between electrodes is 5 cm, cathodic current density is 1.05 A.cm-2 and anodic current density is 0.8A.cm-2 , the reoxidation of sponge titanium can be effectively avoided, the loss of electric current can be reduced and current efficiency can be greatly improved. Secondly, current efficiency can be greatly improved when mix molten salt system CaCl2+A is adopted, which can greatly reduce the electrolysis temperature and the resistance of molten salt. Thirdly, current efficiency can be greatly improved through selecting appropriate vacuum degree, appropriate molten salt system, appropriate space between electrodes, appropriate current density; in addition, keeping tidy reduction cell inside and adopting high-purity molten salt and raw material TiO2 are another ways for current efficiency improvement.

Study of Back Electromotive Force in the Preparation of Al-Ca Alloy by Molten Salt Electrolysis Method

2011 ◽  
Vol 233-235 ◽  
pp. 2765-2768
Author(s):  
Yi Yong Wang ◽  
Hui Jin ◽  
Fa Yu Wu ◽  
Ji Dong Li ◽  
Zhi Ying Wang
Keyword(s):  
Molten Salt ◽  
Current Density ◽  
Electromotive Force ◽  
Control Method ◽  
Cell Voltage ◽  
Feeding Period ◽  
Technological Parameters ◽  
Molten Salt Electrolysis ◽  
Potential Control ◽  
Electrolysis Method

Al-Ca master alloy was prepared by molten salt electrolysis method, using a mixed molten salt system of CaCl2-CaF2and feeding CaO as electrolysis material. The technological parameters such as back electromotive force (BEMF), cell voltage, and current were measured by testing device of molten salt electrolysis. The effects of current density, CaO addition, electrolysis time and feeding period on the back electromotive force in the electrolysis process are studied. The results indicate that back electromotive force increases with current density increasing, the feeding period is 30min measured by potential control method. Finally, the Al-Ca alloy with the Ca content of 11.6wt% can be obtained by electrolyzing for 1h at the current of 7A and at 740.

A physical model for the aging of an aluminum-base alloy reinforced with nitride particles

2006 ◽  
Vol 42 (10) ◽  
pp. 1065-1071 ◽  
Author(s):  
J. L. Ortiz ◽  
V. Amigó ◽  
O. Olvera ◽  
A. Manzano ◽  
Yu. V. Vorobiev
Keyword(s):  
Physical Model ◽  
Base Alloy ◽  
Aluminum Base Alloy ◽  
Aluminum Base

Research on Removal of Sulfide Inclusion in Steel Surface by Molten Salt Electrolysis

2010 ◽  
Vol 152-153 ◽  
pp. 834-838
Author(s):  
Li Guang Zhu ◽  
Hua Gao ◽  
Ying Xu ◽  
Ling Wang ◽  
Xin Sheng Liu
Keyword(s):  
Cyclic Voltammetry ◽  
Molten Salt ◽  
Steel Surface ◽  
Sulfide Inclusion ◽  
Metallographic Analysis ◽  
Electrolysis Time ◽  
Direct Proportion ◽  
Molten Salt Electrolysis ◽  
Density Graphite ◽  
Graphite Rod

Steel including sulfide inclusion was used as cathode, while high density graphite rod was used as anode. Sulfide inclusion in steel surface was removed by molten salt electrolysis in molten CaCl2 at 850 under the stationary voltage. The influences of the voltage and electrolytic time on the process of reaction were investigated. The distributions of the sulfide inclusion were investigated by SEM. The desulfurated ratio was investigated by quantitative metallographic analysis, Cyclic voltammetry was performed to characterize reactions of cathode. The results show that the voltage and the time of electrolysis were in direct proportion with desulfurated ratio. The higher voltage and the longer electrolysis time is, the greater the desulfurated ratio is.

Aluminothermic Reduction-Molten Salt Electrolysis Using Inert Anode for Oxygen and Al-Base Alloy Extraction from Lunar Soil Simulant

JOM ◽  
2017 ◽  
Vol 69 (10) ◽  
pp. 1963-1969 ◽  
Author(s):  
Kaiyu Xie ◽  
Zhongning Shi ◽  
Junli Xu ◽  
Xianwei Hu ◽  
Bingliang Gao ◽  
...  
Keyword(s):  
Molten Salt ◽  
Base Alloy ◽  
Inert Anode ◽  
Lunar Soil ◽  
Aluminothermic Reduction ◽  
Molten Salt Electrolysis

A New Aluminum-Base Alloy with Potential Cryogenic Applications

1986 ◽  
pp. 437-442 ◽  
Author(s):  
J. C. Ho ◽  
C. E. Oberly ◽  
H. L. Gegel ◽  
W. M. Griffith ◽  
J. T. Morgan ◽  
...  
Keyword(s):  
Base Alloy ◽  
Aluminum Base Alloy ◽  
Aluminum Base
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