A kind of production device and method of lithium-magnesium alloy

Abstract

The invention discloses a production device of a lithium magnesium alloy. The production device of the lithium magnesium alloy comprises a control system, a lifting system, a stirring system, a melting device, an air floation slagging device and a casting mold. The control system is connected with thermocouple, and the thermocouple is fixedly connected to the side wall of the interior of the melting device. The control system is connected with the lifting system and the melting device, and the lifting system is connected into a glove box in an up-and-down-slipping mode. The air floation slagging device is located below the stirring system, and the stirring system and the air floation slagging device can work in the melting device in an up-and-down-lifting mode through the lifting system. Adischarge valve device which can be opened and closed is arranged at the bottom of the melting device in a communicating mode. The casting mold can be movably disposed under the glove box, and the inside of the glove box is filled with protective atmosphere gas. The production device of the lithium magnesium alloy is easy to operate, continuous melting and casting can be carried out, lithium magnesium loss is small, impurities in the alloy are less, the product yield is high and the performance is stable; and uniform distribution of magnesium is achieved, the electrochemical performance is superior, the performance is stable, and subsequent deep processing performance is good.

Description

technical field [0001] The invention relates to a metal alloy production device, in particular to a lithium-magnesium alloy production device. [0002] The present invention also relates to a method for preparing a lithium-magnesium alloy using the above-mentioned lithium-magnesium alloy production device. Background technique [0003] Lithium metal is often used as a negative electrode material for primary or secondary lithium series batteries. Lithium electrodes have the advantages of strong conductivity, active electrochemical properties, strong reducibility, small electrochemical equivalent, and large theoretical specific capacity. Big defects, such as low cycle efficiency, poor safety, etc., especially safety issues. In order to solve the safety problem, people have done a lot of research work on replacing lithium metal negative electrodes with lithium alloys, such as lithium-magnesium alloys, lithium-aluminum alloys, lithium-tin alloys, etc. Experimental research data...

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Problems solved by technology

Invention patent (ZL201710112557.8) discloses a lithium-sulfur secondary battery using a lithium alloy with high magnesium content as the negative electrode material, and the battery has high specific capacity and excellent stability, but does not publish detailed information about the high magnesium content Production method of lithium alloy

The disadvantage of the covering agent protection smelting method is that the metal loss is relatively obvious, and the flux is likely to cause the increase of impurities in the ingot, which reduces the performance of the alloy and has a high risk factor in the operation process.

Moreover, the vacuum induction melting method and the covering agent protection melting method are both one-time melting and casting methods, which have high energy consumption, large material loss, and low yield, which cannot guarantee the uniformity of the lithium-magnesium alloy, which affects the performance of the lithium-magnesium alloy.

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