Aluminum source for electrolytic preparation of aluminum-containing aluminum alloy, preparation method thereof and method for preparing aluminum-containing alloy through aluminum source

Abstract

The invention provides an aluminum source for electrolytic preparation of an aluminum-containing aluminum alloy. The aluminum source comprises complex salt which is formed by aluminum halide and alkali metal halides. The aluminum source comprises problems of easy water absorbing of aluminum halide at a normal temperature, easy sublimation at a high temperature, and high difficulty for controllingthe actual adding amount of the aluminum source. Furthermore the aluminum source has advantages of settling environment harm caused by sublimation of an aluminum halide aluminum source, settling a problem of aluminum hydroxide deposition generation caused by water absorbing of the aluminum halide aluminum source, and prolonging slag removal period of an electrolytic cell and service life of the electrolytic cell. The aluminum source is used for preparing the aluminum-containing alloy and can realize advantages of controlling the content of the aluminum element which enters electrolyte, furtherrealizing element proportion controllability of the aluminum-containing alloy, realizing high stability of element proportions in different batches of aluminum-containing alloy, and saving secondarymelting in preparing a workpiece through the aluminum-containing alloy material. Furthermore the aluminum source according to the invention can reduce sublimation of the aluminum element and reduces environment harm.

Description

technical field [0001] The invention belongs to the field of metallurgy and materials, and in particular relates to an aluminum source for electrolytically preparing an aluminum alloy and a method for preparing an aluminum alloy using the same. Background technique [0002] Magnesium aluminum alloy, lithium aluminum alloy, beryllium aluminum, manganese aluminum, silicon aluminum, tin aluminum, scandium aluminum, yttrium aluminum, zirconium aluminum, rare earth aluminum alloy and other aluminum alloys have unique excellent properties and are widely used in the preparation of new materials or as New materials are used in aerospace, aviation, military industry, transportation vehicles, electronics, 3C and other fields. In recent years, the miniaturization, intelligence, and lightweight development of products have become faster and faster, and the demand for new materials has become more and more urgent. For example, magnesium-aluminum alloy has the characteristics of light we...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: ①The alloy production process is cumbersome: the metals required for alloying need to be obtained through their respective metallurgical processes, and then the target alloy can be obtained through secondary or even multiple smelting; ②The product uniformity is poor: due to the different metals involved in alloying The density difference is large (such as the density of metal magnesium is 1.74g / cm 3 , the density of rare earth metal neodymium is 7.00g / cm 3 ), even if mechanical stirring is used in the high-temperature liquid phase, it is difficult to ensure that the alloying elements can be fully mixed, so the obtained magnesium alloy has a certain composition segregation; The performance of the alloy is quite different; ④The environmental hazard is great: some metals such as magnesium cannot form a dense oxide film at high temperature to isolate the reaction between the metal and oxygen, so good protection measures must be taken during the smelting process, and SF, which is still widely used today 6 The protective gas will pose a huge threat to the environment; ⑤ serious burning loss: the oxidation burning loss of active metals is serious during the heating and smelting process

[0011] (1) Anhydrous aluminum halides, especially anhydrous aluminum chloride, are prone to sublimation and volatilization at the electrolysis temperature, making it impossible to determine the amount of aluminum source added according to the aluminum content of the aluminum alloy, and it is difficult to control the amount of aluminum in the aluminum alloy. The content of aluminum element; in addition, because it is difficult to control the amount of aluminum element that actually enters the aluminum alloy, although the aluminum source added in each batch is the same, the aluminum content of each batch of aluminum alloy is unstable;

[0012] (2) Anhydrous aluminum halides, especially anhydrous aluminum chloride, are very easy to absorb water and form aluminum halides with crystal water. After they are added to the electrolyte, aluminum oxide is easily formed and deposited on the bottom of the electrolytic cell, which is difficult to remove and needs to be broken. Electrolytically clears the alumina that sinks to the bottom, which affects the life of the electrolytic cell

[0013] This field needs to develop an aluminum source for the electrolytic preparation of aluminum alloys, which can solve the problem of sublimation and water absorption in aluminum alloys caused by sublimation and water absorption. The aluminum element in the alloy is unstable and causes the problem of short life of the electrolytic cell

Images