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Molten salt electrolyte composition for preparing magnesium-rare earth alloy by using water-containing chloride to electrolyze

A technology of magnesium rare earth alloy and molten salt electrolyte, which is applied in the field of molten salt electrolyte composition, can solve the problems of high comprehensive cost and high cost of anhydrous chloride preparation, and achieve the effect of reducing preparation cost

Inactive Publication Date: 2011-10-19
QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] When using molten salt electrolysis to prepare magnesium rare earth alloys, if a chloride molten salt electrolysis system is used, anhydrous chloride is generally used as the electrolytic raw material, but the preparation cost of anhydrous chloride is relatively high, resulting in the use of anhydrous chloride as the raw material. When electrolytically preparing magnesium rare earth alloys from raw materials, the overall cost is relatively high

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Example 1 The molten salt electrolyte composition of magnesium rare earth alloy prepared by the electrolysis of hydrated chloride is composed of potassium chloride, anhydrous magnesium chloride, and anhydrous lanthanum chloride in a mass ratio of 1:0.05:0.5 (kg / kg / kg) mixed.

[0017] Use molten salt electrolyte composition to start the electrolysis furnace, and then add a mixture of magnesium chloride containing 0.5 crystal water and lanthanum chloride containing 0.5 crystal water in a solid manner in the electrolytic tank, and use the metal molybdenum rod as the cathode and graphite The crucible is the anode, and electrolysis is performed under the conditions of a current of 1000 to 1500 A, a voltage of 8 to 12 V, and a temperature of 850 to 1100°C. The obtained product contains 95 wt% of lanthanum, and the current efficiency is 60-70%.

[0018] Among them: the mass ratio of magnesium chloride containing 0.5 crystal water to lanthanum chloride containing 0.5 crystal water...

Embodiment 2

[0020] Example 2 The molten salt electrolyte composition of magnesium rare earth alloy prepared by the electrolysis of hydrated chloride, the molten salt electrolyte composition is composed of potassium chloride, anhydrous magnesium chloride, and anhydrous lanthanum chloride in a mass ratio of 1:0.25:0.10 (kg / kg / kg) mixed.

[0021] Use molten salt electrolyte composition to start the electrolysis furnace, and then add a mixture of magnesium chloride containing 6 crystal water and lanthanum chloride containing 4 crystal water in the electrolytic cell by dripping, to a liquid containing about 50wt% of lanthanum The magnesium lanthanum alloy is a sinking cathode, a graphite crucible is used as an anode, and the product is electrolyzed under the conditions of a current of 1000-1500A, a voltage of 10.0-15.0V, and a temperature of 820-920°C. The product contains 50wt% lanthanum, and the current efficiency is 60-70%.

[0022] Among them: the mass ratio of magnesium chloride containing 6...

Embodiment 3

[0024] Example 3 The molten salt electrolyte composition of magnesium rare earth alloy prepared by the electrolysis of hydrated chloride, the molten salt electrolyte composition is composed of potassium chloride, anhydrous magnesium chloride, and anhydrous scandium chloride in a mass ratio of 1:0.5:0.1 (kg / kg / kg) mixed.

[0025] Use molten salt electrolyte composition to start the electrolysis furnace, and then add a mixture of magnesium chloride containing 6 crystal water and scandium chloride containing 6 crystal water in the electrolytic tank by dripping, with a metal tungsten rod as the cathode, The graphite crucible is the anode, and electrolysis is performed under the conditions of a current of 1500 to 2000 A, a voltage of 10 to 15 V, and a temperature of 820 to 1000°C. The obtained product contains 20 wt% of scandium, and the current efficiency is 60-70%.

[0026] Among them: the mass ratio of magnesium chloride containing 6 crystal water to scandium chloride containing 6 ...

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Abstract

The invention relates to a molten salt electrolyte composition for preparing magnesium-rare earth alloy by using water-containing chloride to electrolyze, wherein the molten salt electrolyte is formed by mixing potassium chloride, anhydrous magnesium chloride, anhydrous rare earth chloride according to the weight ratio of 1: 0.05: 0.50-1: 0.50: 0.05. When the magnesium-rare earth alloy is prepared by using water-containing chloride as raw material to electrolyze, the preparation cost can be effectively reduced, and simultaneously the rare earth content with relatively wider range can be obtained under the condition that water-containing chloride is used as electrolysis raw material to electrolyze.

Description

Technical field [0001] The invention relates to the technical field of preparing magnesium rare earth alloys by molten salt electrolysis, in particular to the molten salt electrolyte composition of magnesium rare earth alloys prepared by the electrolysis of hydrated chlorides. Background technique [0002] Magnesium alloy is known as a lightweight, green metal structural material in the 21st century, and its sustainable development strategy is of great significance. Magnesium rare earth alloys are more attractive among magnesium alloys. Compared with traditional magnesium alloys, magnesium rare earth alloys have the advantages of heat resistance, corrosion resistance, oxidation resistance, and high temperature creep resistance. They can be widely used in aerospace, land transportation, and 3C. Products and other fields and departments. [0003] The preparation methods of magnesium rare earth alloys mainly include mixed melting method, metal thermal reduction method and molten salt...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25C3/36
Inventor 吴志坚孙庆国马海州火焱李权周园叶秀深王世栋葛飞韩继龙都永生年洪恩任秀峰王宏宾张洪杰孟健牛晓东彭秋明王鸿燕杜海唐定骧鲁化一赵连山
Owner QINGHAI INST OF SALT LAKES OF CHINESE ACAD OF SCI
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